The sulfate minerals are a class of
mineral
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. ( ...
s that include the
sulfate ion () within their structure. The sulfate minerals occur commonly in primary
evaporite
An evaporite () is a water-soluble sedimentary mineral deposit that results from concentration and crystallization by evaporation from an aqueous solution. There are two types of evaporite deposits: marine, which can also be described as ocea ...
depositional environment
In geology, depositional environment or sedimentary environment describes the combination of physical, chemical, and biological processes associated with the deposition of a particular type of sediment and, therefore, the rock types that will be ...
s, as
gangue
In mining, gangue () is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit. It is thus distinct from overburden, which is the waste rock or materials overlying an ore or mineral body ...
minerals in
hydrothermal
Hydrothermal circulation in its most general sense is the circulation of hot water (Ancient Greek ὕδωρ, ''water'',Liddell, H.G. & Scott, R. (1940). ''A Greek-English Lexicon. revised and augmented throughout by Sir Henry Stuart Jones. with th ...
veins
Veins are blood vessels in humans and most other animals that carry blood towards the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated b ...
and as secondary minerals in the
oxidizing
Redox (reduction–oxidation, , ) is a type of chemical reaction in which the oxidation states of substrate change. Oxidation is the loss of electrons or an increase in the oxidation state, while reduction is the gain of electrons or a d ...
zone of
sulfide mineral
The sulfide minerals are a class of minerals containing sulfide (S2−) or disulfide (S22−) as the major anion. Some sulfide minerals are economically important as metal ores. The sulfide class also includes the selenides, the tellurides, the ...
deposits. The
chromate and
manganate
In inorganic nomenclature, a manganate is any negatively charged molecular entity with manganese as the central atom.. However, the name is usually used to refer to the tetraoxidomanganate(2−) anion, MnO, also known as manganate(VI) because it c ...
minerals have a similar structure and are often included with the sulfates in mineral classification systems.
[Klein, Cornelis and Cornelius S. Hurlbut, 1985, ''Manual of Mineralogy,'' 20th ed., John Wiley and Sons, New York, pp. 347–354 .]
Sulfate minerals include:
*Anhydrous sulfates
**
Barite
Baryte, barite or barytes ( or ) is a mineral consisting of barium sulfate ( Ba S O4). Baryte is generally white or colorless, and is the main source of the element barium. The ''baryte group'' consists of baryte, celestine (strontium sulfate), ...
BaSO
4
**
Celestite SrSO
4
**
Anglesite
Anglesite is a lead sulfate mineral with the chemical formula PbSO4. It occurs as an oxidation product of primary lead sulfide ore, galena. Anglesite occurs as prismatic orthorhombic crystals and earthy masses, and is isomorphous with barite and ...
PbSO
4
**
Anhydrite
Anhydrite, or anhydrous calcium sulfate, is a mineral with the chemical formula CaSO4. It is in the orthorhombic crystal system, with three directions of perfect cleavage parallel to the three planes of symmetry. It is not isomorphous with the ...
CaSO
4
**
Hanksite
Hanksite is a sulfate mineral, distinguished as one of only a handful that contain both carbonate and sulfate ion groups. It has the chemical formula Na22 K( SO4)9( CO3)2 Cl.
Occurrence
It was first described in 1888 for an occurrence in Searl ...
Na
22K(SO
4)
9(CO
3)
2Cl
*Hydroxide and hydrous sulfates
**
Gypsum
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula . It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard or sidewalk chalk, and drywall. ...
CaSO
4·2H
2O
**
Chalcanthite
Chalcanthite (, ) is a richly colored blue-green water-soluble sulfate mineral . It is commonly found in the late-stage oxidation zones of copper deposits. Due to its ready solubility, chalcanthite is more common in arid regions.
Chalcanthite i ...
CuSO
4·5H
2O
**
Kieserite
Kieserite, or magnesium sulfate monohydrate, is a hydrous magnesium sulfate mineral with formula (MgSO4·H2O).
It has a vitreous luster and it is colorless, grayish-white or yellowish. Its hardness is 3.5 and crystallizes in the monoclinic cry ...
MgSO
4·H
2O
**
Starkeyite MgSO
4·4H
2O
**
Hexahydrite
Magnesium sulfate or magnesium sulphate (in English-speaking countries other than the US) is a chemical compound, a salt with the formula , consisting of magnesium cations (20.19% by mass) and sulfate anions . It is a white crystalline solid, s ...
MgSO
4·6H
2O
**
Epsomite
Epsomite, Epsom salt, or magnesium sulfate heptahydrate, is a hydrous magnesium sulfate mineral with formula MgSO4·7H2O.
Epsomite crystallizes in the orthorhombic system as rarely found acicular or fibrous crystals, the normal form is as massiv ...
MgSO
4·7H
2O
**
Meridianiite
Meridianiite is the mineral consisting of magnesium sulfate undecahydrate, . It is colorless transparent crystalline salt that precipitates from solutions saturated in Mg2+ and SO42− ions at temperatures less than 2 °C. The synthetic com ...
MgSO
4·11H
2O
**
Melanterite
Melanterite is a mineral form of hydrous iron(II) sulfate: FeSO4·7H2O. It is the iron analogue of the copper sulfate chalcanthite. It alters to siderotil by loss of water. It is a secondary sulfate mineral which forms from the oxidation of pri ...
FeSO
4·7H
2O
**
Antlerite
Antlerite is a greenish hydrous copper sulfate mineral, with the formula Cu3(SO4)(OH)4. It occurs in tabular, acicular, or fibrous crystals with a vitreous luster. Originally believed to be a rare mineral, antlerite was found to be the primary o ...
Cu
3SO
4(OH)
4
**
Brochantite
Brochantite is a sulfate mineral, one of a number of cupric sulfates. Its chemical formula is Cu4SO4(OH)6. Formed in arid climates or in rapidly oxidizing copper sulfide deposits, it was named by Armand Lévy for his fellow Frenchman, geologist ...
Cu
4SO
4(OH)
6
**
Alunite KAl
3(SO
4)
2(OH)
6
**
Jarosite
Jarosite is a basic hydrous sulfate of potassium and ferric iron (Fe-III) with a chemical formula of KFe3(SO4)2(OH)6. This sulfate mineral is formed in ore deposits by the oxidation of iron sulfides. Jarosite is often produced as a byproduct du ...
KFe
3(SO
4)
2(OH)
6
Nickel–Strunz classification -07- sulfates
IMA-CNMNC proposes a new hierarchical scheme (Mills et al., 2009). This list uses it to modify the
Classification of Nickel–Strunz (
mindat.org, 10 ed, pending publication).
*Abbreviations:
**"*" – discredited (IMA/CNMNC status).
**"?" – questionable/doubtful (IMA/CNMNC status).
**"REE" –
Rare-earth element
The rare-earth elements (REE), also called the rare-earth metals or (in context) rare-earth oxides or sometimes the lanthanides ( yttrium and scandium are usually included as rare earths), are a set of 17 nearly-indistinguishable lustrous silv ...
(Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu)
**"PGE" –
Platinum-group element (Ru, Rh, Pd, Os, Ir, Pt)
**03.C Aluminofluorides, 06 Borates, 08 Vanadates (04.H V
,6/sup> Vanadates), 09 Silicates:
***Neso: insular (from Greek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
*Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed last common ancestor ...
νησος nēsos, island)
***Soro: grouping (from Greek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
*Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed last common ancestor ...
σωροῦ sōros, heap, mound (especially of corn))
***Cyclo: ring
***Ino: chain (from Greek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
*Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed last common ancestor ...
ις enitive: ινος ''inos'' fibre)
***Phyllo: sheet (from Greek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
*Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed last common ancestor ...
φύλλον ''phyllon'', leaf)
***Tekto: three-dimensional framework
*Nickel–Strunz code scheme: NN.XY.##x
**NN: Nickel–Strunz mineral class number
**X: Nickel–Strunz mineral division letter
**Y: Nickel–Strunz mineral family letter
**##x: Nickel–Strunz mineral/group number, x add-on letter
Class: sulfates, selenates, tellurates
* 07.A Sulfates (selenates, etc.) without Additional Anions, without H2O
** 07.AB With medium-sized cations: 05 Millosevichite
Millosevichite is a rare sulfate mineral with the chemical formula Al2(SO4)3. Aluminium is often substituted by iron. It forms finely crystalline and often porous masses.
It was first described in 1913 for an occurrence in Grotta dell'Allume, Por ...
, 05 Mikasaite; 10 Chalcocyanite, 10 Zincosite*
** 07.AC With medium-sized and large cations: IMA2008-029, 05 Vanthoffite; 10 Efremovite
Efremovite is a rare ammonium sulfate mineral with the chemical formula: (NH4)2Mg2(SO4)3. It is a white to gray cubic mineral. This anhydrous sulfate occurs as constituent in sulfate crusts of burning coal dumps. It is hygroscopic and when expo ...
, 10 Manganolangbeinite, 10 Langbeinite
Langbeinite is a potassium magnesium sulfate mineral with the chemical formula K2Mg2(SO4)3. Langbeinite crystallizes in the isometric-tetartoidal (cubic) system as transparent colorless or white with pale tints of yellow to green and violet cry ...
; 15 Eldfellite, 15 Yavapaiite; 20 Godovikovite
Godovikovite is a rare sulfate mineral with the chemical formula: (NH4)Al(SO4)2. Aluminium can partially be substituted by iron. Hydration of godovikovite gives the ammonium alum, tschermigite. The mineral forms cryptocrystalline, often porous, ...
, 20 Sabieite Sabieite is a mineral with the chemical formula ( N H4) Fe3+( S O4)2. Its type locality is Lone Creek Falls cave, Sabie, Pilgrim's Rest District Ehlanzeni, Mpumalanga Province, South Africa. Its crystals are trigonal to trapezohedral. It is whit ...
; 25 Thenardite, 35 Aphthitalite
Aphthitalite is a potassium sulfate mineral with the chemical formula: (K,Na)3Na(SO4)2.
It was first described in 1835 for an occurrence on Mount Vesuvius, Italy. The name is from the Greek άφθητος, "unalterable", and άλας, "salt", for ...
** 07.AD With only large cations: 05 Arcanite, 05 Mascagnite
Mascagnite is a rare ammonium sulfate mineral ( N H4)2 S O4. It crystallizes in the orthorhombic system typically forming as stalactitic masses exhibiting good cleavage. It is soft (not higher than 2.5 on the Mohs Scale) and water-soluble. Opti ...
; 10 Mercallite, 15 Misenite, 20 Letovicite
Letovicite () is an ammonium sulfate mineral with composition (NH4)3H(SO4)2 (IUPAC: triammonium sulfate hydrogensulfate, Nickel–Strunz classification 07.AD.20).
It is a rare colorless or white monoclinic secondary mineral formed during the burn ...
, 25 Glauberite
Glauberite is a monoclinic sodium calcium sulfate mineral with the formula Na2 Ca( S O4)2.
It was first described in 1808 for material from the El Castellar Mine, Villarrubia de Santiago, Toledo, Castile-La Mancha, Spain. It was named for the ...
, 30 Anhydrite
Anhydrite, or anhydrous calcium sulfate, is a mineral with the chemical formula CaSO4. It is in the orthorhombic crystal system, with three directions of perfect cleavage parallel to the three planes of symmetry. It is not isomorphous with the ...
; 35 Anglesite
Anglesite is a lead sulfate mineral with the chemical formula PbSO4. It occurs as an oxidation product of primary lead sulfide ore, galena. Anglesite occurs as prismatic orthorhombic crystals and earthy masses, and is isomorphous with barite and ...
, 35 Barite
Baryte, barite or barytes ( or ) is a mineral consisting of barium sulfate ( Ba S O4). Baryte is generally white or colorless, and is the main source of the element barium. The ''baryte group'' consists of baryte, celestine (strontium sulfate), ...
, 35 Celestine, 35 Radiobarite*, 35 Olsacherite; 40 Kalistrontite, 40 Palmierite Palmierite, K2Pb(SO4)2, is a rare sulfate mineral. Its presence was detected in the Voynich manuscript
The Voynich manuscript is an illustrated codex hand-written in an otherwise unknown writing system, referred to as 'Voynichese'. The vellum o ...
* 07.B Sulfates (selenates, etc.) with additional anions, without H2O
** 07.BB With medium-sized cations: 05 Caminite, 10 Hauckite, 15 Antlerite
Antlerite is a greenish hydrous copper sulfate mineral, with the formula Cu3(SO4)(OH)4. It occurs in tabular, acicular, or fibrous crystals with a vitreous luster. Originally believed to be a rare mineral, antlerite was found to be the primary o ...
, 20 Dolerophanite, 25 Brochantite
Brochantite is a sulfate mineral, one of a number of cupric sulfates. Its chemical formula is Cu4SO4(OH)6. Formed in arid climates or in rapidly oxidizing copper sulfide deposits, it was named by Armand Lévy for his fellow Frenchman, geologist ...
, 30 Vergasovaite, 35 Klebelsbergite, 40 Schuetteite, 45 Paraotwayite, 50 Xocomecatlite
Xocomecatlite is a rare tellurate mineral with formula: Cu3(TeO4)(OH)4. It is an orthorhombic mineral which occurs as aggregates or spherules of green needlelike crystals.
It was first described in 1975 for an occurrence in the Oriental mine near ...
, 55 Pauflerite
** 07.BC With medium-sized and large cations: 05 Dansite; 10 Alunite, 10 Ammonioalunite, 10 Ammoniojarosite, 10 Beaverite, 10 Argentojarosite, 10 Huangite, 10 Dorallcharite, 10 Jarosite
Jarosite is a basic hydrous sulfate of potassium and ferric iron (Fe-III) with a chemical formula of KFe3(SO4)2(OH)6. This sulfate mineral is formed in ore deposits by the oxidation of iron sulfides. Jarosite is often produced as a byproduct du ...
, 10 Hydroniumjarosite, 10 Minamiite, 10 Natrojarosite, 10 Natroalunite
Alunite is a hydroxylated aluminium potassium sulfate mineral, formula potassium, Kaluminum, Al3(sulfur, Soxygen, O4)2(Ohydrogen, H)6. It was first observed in the 15th century at Tolfa, near Rome, where it was mined for the manufacture of alum. ...
, 10 Osarizawaite
Osarizawaite is a greenish yellow sulfate mineral with the chemical formula: Pb Cu Al2( S O4)2(O H)6. It has rhombohedral
In geometry, a rhombohedron (also called a rhombic hexahedron or, inaccurately, a rhomboid) is a three-dimensional figu ...
, 10 Plumbojarosite, 10 Walthierite, 10 Schlossmacherite; 15 Yeelimite; 20 Atlasovite, 20 Nabokoite; 25 Chlorothionite; 30 Fedotovite, 30 Euchlorine
Euchlorine (KNaCu3(SO4)3O) is a rare emerald-green colored sulfate mineral found naturally occurring as a sublimate in fumaroles around volcanic eruptions. It was first discovered in fumaroles of the 1868 eruption at Mount Vesuvius in Campania, ...
; 35 Kamchatkite, 40 Piypite
Piypite is a rare potassium, copper sulfate mineral with formula: K2Cu2O(SO4)2. It crystallizes in the tetragonal system and occurs as needlelike crystals and masses. Individual crystals are square in cross-section and often hollow. It is emerald ...
; 45 Klyuchevskite-Duplicate, 45 Klyuchevskite, 45 Alumoklyuchevskite; 50 Caledonite
Caledonite, whose name derives from Caledonia, the historical name of its place of discovery (Scotland), is a richly colored blue-green sulfate-carbonate mineral of lead and copper with an orthorhombic crystal structure. It is an uncommon mineral ...
, 55 Wherryite, 60 Mammothite
Mammothite is a mineral found in the Mammoth mine in Tiger, Arizona, Tiger, Arizona and also in Laurium, Attika, Greece. This mineral was named in 1985 by Donald R. Peacor, Pete J. Dunn, G. Schnorrer-Köhler, and Richard A. Bideaux, for the Mammot ...
; 65 Munakataite, 65 Schmiederite, 65 Linarite
Linarite is a somewhat rare, crystalline mineral that is known among mineral collectors for its unusually intense, pure blue color. It is formed by the oxidation of galena and chalcopyrite and other copper sulfides. It is a combined copper le ...
; 70 Chenite, 75 Krivovichevite
** 07.BD With only large cations: 05 Sulphohalite; 10 Galeite, 10 Schairerite; 15 Kogarkoite
Kogarkoite is a sodium sulfate fluoride mineral with formula Na3(SO4)F. It has a pale blue color, a specific gravity of about 2.67 and a hardness of 3.5. The crystal is monoclinic and is a type of naturally occurring antiperovskite. Kogarkoite is ...
; 20 Cesanite
Cesanite is the end member of the apatite-wilkeite-ellestadite series that substitutes all of apatite's phosphate ions with sulfate ions and balances the difference in charge by replacing several calcium ions with sodium ions. Currently very few s ...
, 20 Caracolite; 25 Burkeite, 30 Hanksite
Hanksite is a sulfate mineral, distinguished as one of only a handful that contain both carbonate and sulfate ion groups. It has the chemical formula Na22 K( SO4)9( CO3)2 Cl.
Occurrence
It was first described in 1888 for an occurrence in Searl ...
, 35 Cannonite, 40 Lanarkite
Lanarkite is a mineral, a form of lead sulfate with formula Pb2(SO4)O. It was originally found at Leadhills in the Scottish county of Lanarkshire, hence the name. It forms white or light green, acicular monoclinic prismatic crystals, usually mi ...
, 45 Grandreefite, 50 Itoite, 55 Chiluite, 60 Hectorfloresite, 65 Pseudograndreefite, 70 Sundiusite
* 07.C Sulfates (selenates, etc.) without additional anions, with H2O
** 07.CB With only medium-sized cations: 05 Gunningite
Gunningite is one of the minerals in the Kieserite group, with the chemical formula . Its name honours Henry Cecil Gunning (1901–1991) of the Geological Survey of Canada and a professor at the University of British Columbia.
Occurrence
Gunning ...
, 05 Dwornikite, 05 Kieserite
Kieserite, or magnesium sulfate monohydrate, is a hydrous magnesium sulfate mineral with formula (MgSO4·H2O).
It has a vitreous luster and it is colorless, grayish-white or yellowish. Its hardness is 3.5 and crystallizes in the monoclinic cry ...
, 05 Szomolnokite
Szomolnokite (Fe2+SO4·H2O) is a monoclinic iron sulfate mineral forming a complete solid solution with magnesium end-member kieserite (MgSO4·H2O). In 1877 szomolnokite's name was derived by Joseph Krenner from its type locality of oxidized sulfi ...
, 05 Szmikite, 05 Poitevinite, 05 Cobaltkieserite; 07 Sanderite, 10 Bonattite, 15 Boyleite, 15 Aplowite
Aplowite is a very rare mineral with the formula CoSO4•4H2O, a naturally occurring cobalt(II) sulfate
Cobalt(II) sulfate is any of the inorganic compounds with the formula CoSO4(H2O)x. Usually cobalt sulfate refers to the hexa- or heptahydra ...
, 15 Ilesite, 15 Rozenite
Rozenite is a hydrous iron sulfate mineral, Fe2+SO4•4(H2O).
It occurs as a secondary mineral, formed under low humidity at less than as an alteration of copper-free melanterite, which is a post mine alteration product of pyrite or marcasite. It ...
, 15 Starkeyite, 15 IMA2002-034; 20 Chalcanthite
Chalcanthite (, ) is a richly colored blue-green water-soluble sulfate mineral . It is commonly found in the late-stage oxidation zones of copper deposits. Due to its ready solubility, chalcanthite is more common in arid regions.
Chalcanthite i ...
, 20 Jokokuite, 20 Pentahydrite, 20 Siderotil
Siderotil is an iron(II) sulfate hydrate mineral with formula: FeSO4·5H2O which forms by the dehydration of melanterite. Copper commonly occurs substituting for iron in the structure. It typically occurs as fibrous or powdery encrustations, but m ...
; 25 Bianchite, 25 Ferrohexahydrite, 25 Chvaleticeite
Chvaleticeite is a monoclinic hexahydrite manganese magnesium sulfate mineral with formula: (Mn2+, Mg) O46(H2O). It occurs in the oxidized zone of manganese silicate deposits with pyrite and rhodochrosite that have undergone regional and conta ...
, 25 Hexahydrite
Magnesium sulfate or magnesium sulphate (in English-speaking countries other than the US) is a chemical compound, a salt with the formula , consisting of magnesium cations (20.19% by mass) and sulfate anions . It is a white crystalline solid, s ...
, 25 Moorhouseite
Moorhouseite is a rare mineral with the formula CoSO4•6H2O, a naturally occurring cobalt(II) sulfate hexahydrate. It is the lower-hydrate-equivalent of bieberite (heptahydrate) and aplowite
Aplowite is a very rare mineral with the formula CoSO4 ...
, 25 Nickelhexahydrite; 30 Retgersite; 35 Bieberite
Bieberite (CoSO4 · 7H2O) is a pinkish red colored sulfate mineral high in cobalt content. The name is derived from the type locality at the copper deposit in Bieber, Hesse, Germany. It has been described and reported as far back as the 1700s.Sage ...
, 35 Boothite
Boothite is a very rare, naturally occurring mineral containing hydrated copper sulfate: Cu(SO4)·7H2O. It was discovered in the Leona Heights region near Oakland, California
Oakland is the largest city and the county seat of Alameda County, ...
, 35 Mallardite, 35 Melanterite
Melanterite is a mineral form of hydrous iron(II) sulfate: FeSO4·7H2O. It is the iron analogue of the copper sulfate chalcanthite. It alters to siderotil by loss of water. It is a secondary sulfate mineral which forms from the oxidation of pri ...
, 35 Zincmelanterite, 35 Alpersite
Alpersite ( IMA symbol: Aps) is a magnesium copper sulfate mineral
The sulfate minerals are a class of minerals that include the sulfate ion () within their structure. The sulfate minerals occur commonly in primary evaporite depositional envi ...
; 40 Epsomite
Epsomite, Epsom salt, or magnesium sulfate heptahydrate, is a hydrous magnesium sulfate mineral with formula MgSO4·7H2O.
Epsomite crystallizes in the orthorhombic system as rarely found acicular or fibrous crystals, the normal form is as massiv ...
, 40 Goslarite
Goslarite is a hydrated zinc sulfate mineral () which was first found in the Rammelsberg mine, Goslar, Harz, Germany. It was described in 1847. Goslarite belongs to the epsomite group which also includes epsomite () and morenosite (). Goslarite i ...
, 40 Morenosite; 45 Alunogen
Alunogen (from French ''alun'', “ alum”), also called feather alum and hair salt is a colourless to white (although often coloured by impurities, such as iron substituting for aluminium) fibrous to needle-like aluminium sulfate mineral. It has ...
, 45 Meta-alunogen; 50 Coquimbite, 50 Paracoquimbite; 55 Rhomboclase, 60 Kornelite, 65 Quenstedtite
Quenstedtite is an uncommon iron sulfate mineral with chemical formula Fe2(SO4)3·11H2O. It forms violet or white triclinic crystals. Found in oxidized zones of pyrite-rich orebodies, especially in arid climates. It was first reported in 1888 f ...
, 70 Lausenite; 75 Lishizhenite, 75 Romerite; 80 Ransomite; 85 Bilinite, 85 Apjohnite, 85 Dietrichite, 85 Halotrichite
Halotrichite, also known as ''feather alum'', is a highly hydrated sulfate of aluminium and iron. Its chemical formula is FeAl2(SO4)4·22H2O. It forms fibrous monoclinic crystals. The crystals are water-soluble.
It is formed by the weathering and ...
, 85 Pickeringite
Pickeringite is a magnesium aluminium sulfate mineral with formula MgAl2(SO4)4·22(H2O). It forms a series with halotrichite.
It forms as an alteration product of pyrite in aluminium rich rocks and in coal seams.
It also occurs in pyrite rich hyd ...
, 85 Redingtonite, 85 Wupatkiite; 90 Meridianiite
Meridianiite is the mineral consisting of magnesium sulfate undecahydrate, . It is colorless transparent crystalline salt that precipitates from solutions saturated in Mg2+ and SO42− ions at temperatures less than 2 °C. The synthetic com ...
, 95 Caichengyunite
** 07.CC With medium-sized and large cations: 05 Krausite, 10 Tamarugite
Tamarugite (sodium, Naaluminium, Al(sulfur, Soxygen, O4)2·6hydrogen, H2O) is a colorless monoclinic sulfate mineral.
Deposits containing tamarugite are geographically dispersed with occurrences of the mineral on all seven continents (Antarctica ...
; 15 Mendozite, 15 Kalinite
Kalinite is a mineral composed of hydrated potassium aluminium sulfate (a type of alum). It is a fibrous monoclinic alum, distinct from isometric potassium alum,American Mineralogist (1923) 8:15 named in 1868. Its name comes from ''kalium'' ...
; 20 Lonecreekite, 20 Alum-(K)
Alum-(K) is a hydrous potassium aluminium sulfate mineral with formula KAl(SO4)2·12(H2O). It is the mineral form of potassium alum and is referred to as potassium alum in older sources. It is a member of the alum group.
It occurs as colorless to ...
, 20 Alum-(Na), 20 Lanmuchangite, 20 Tschermigite
Tschermigite is a mineral form of ammonium alum, formula N H4 Al( S O4)2·12(H2O). It is found in burning coal seams, bituminous shale and fumarole
A fumarole (or fumerole) is a vent in the surface of the Earth or other rocky planet fro ...
; 25 Pertlikite, 25 Monsmedite?, 25 Voltaite, 25 Zincovoltaite; 30 Krohnkite, 35 Ferrinatrite, 40 Goldichite, 45 Loweite; 50 Blodite, 50 Changoite
Changoite is a rare zinc sulfate mineral with the formula Na2Zn(SO4)2·4H2O. Chagoite was discovered in the San Francisco Mine near Sierra Gorda, Antofagasta, Chile. The mineral is a zinc-analogue of blödite, cobaltoblödite, manganoblödite an ...
, 50 Nickelblodite; 55 Mereiterite, 55 Leonite
Leonite is a hydrated double sulfate of magnesium and potassium. It has the formula K2SO4·MgSO4·4H2O. The mineral was named after Leo Strippelmann, who was director of the salt works at Westeregeln in Germany. The mineral is part of the blodit ...
; 60 Boussingaultite, 60 Cyanochroite, 60 Mohrite
Mohrite, (NH4)2Fe(SO4)2 · 6 H2O, is a rare ammonium iron(II) sulfate mineral originally found in the geothermal fields of Tuscany, Italy. This Fe-dominant analogue of boussingaultite is sometimes reported from burning coal dumps where it is a p ...
, 60 Picromerite
Picromerite (synonyms: schoenite, schönite) is a mineral from the class of hydrous sulfates lacking additional anions, and containing medium to large cations according to the Nickel–Strunz classification.
Etymology
The name comes from the Gr ...
, 60 Nickelboussingaultite; 65 Polyhalite
Polyhalite is an evaporite mineral, a hydrated sulfate of potassium, calcium and magnesium with formula: . Polyhalite crystallizes in the triclinic system, although crystals are very rare. The normal habit is massive to fibrous. It is typically c ...
; 70 Leightonite, 75 Amarillite, 80 Konyaite, 85 Wattevilleite
** 07.CD With only large cations: 05 Matteuccite, 10 Mirabilite
Mirabilite, also known as Glauber's salt, is a hydrous sodium sulfate mineral with the chemical formula Na2SO4·10H2O. It is a vitreous, colorless to white monoclinic mineral that forms as an evaporite from sodium sulfate-bearing brines. It is fo ...
, 15 Lecontite, 20 Hydroglauberite, 25 Eugsterite, 30 Gorgeyite; 35 Koktaite, 35 Syngenite
Syngenite is an uncommon potassium calcium sulfate mineral with formula K2Ca(SO4)2·H2O. It forms as prismatic monoclinic crystals and as encrustations.
Discovery and occurrence
It was first described in 1872 for an occurrence as Druse (geology), ...
; 40 Gypsum
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula . It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard or sidewalk chalk, and drywall. ...
, 45 Bassanite
Bassanite is a calcium sulfate mineral with formula CaSO4· H2O or 2CaSO4·H2O. In other words it has half a water molecule per CaSO4 unit, hence its synonym ''calcium sulfate hemihydrate''.
Bassanite was first described in 1910 for an occurrenc ...
, 50 Zircosulfate, 55 Schieffelinite, 60 Montanite, 65 Omongwaite
* 07.D Sulfates (selenates, etc.) with additional anions, with H2O
** 07.DB With only medium-sized cations; insular octahedra and finite groups: 05 Svyazhinite, 05 Aubertite, 05 Magnesioaubertite; 10 Rostite, 10 Khademite; 15 Jurbanite
Jurbanite is a sulfate mineral with the chemical formula aluminum, Alsulfur, Soxygen, O4(Ohydrogen, H)·5water, H2O. Its molecular weight is 230.13 g/mol. It crystallizes in the monoclinic system and is dimorphous with the orthorhombic mineral ros ...
; 20 Minasragrite, 20 Anorthominasragrite, 20 Orthominasragrite; 25 Bobjonesite; 30 Amarantite
Amarantite is an amaranth-red to brownish mineral with the general formula of Fe3+2O(SO4)2·7H2O or Fe3+SO4(OH)·3H2O.
The name comes from the Greek word αμάραντος which means amaranth, an imaginary undying red flower, in allusion to ...
, 30 Hohmannite, 30 Metahohmannite; 35 Aluminocopiapite, 35 Copiapite
Copiapite is a hydrated iron sulfate mineral with formula: Fe2+Fe3+4(SO4)6(OH)2·20(H2O). Copiapite can also refer to a mineral group, the copiapite group.
Copiapite is strictly a secondary mineral forming from the weathering or oxidation of iro ...
, 35 Calciocopiapite, 35 Cuprocopiapite, 35 Ferricopiapite, 35 Magnesiocopiapite, 35 Zincocopiapite
** 07.DC With only medium-sized cations; chains of corner-sharing octahedra: 05 Aluminite
Aluminite is a hydrous aluminium sulfate mineral with formula: Al2SO4(OH)4·7H2O. It is an earthy white to gray-white monoclinic mineral which almost never exhibits crystal form. It forms botryoidal to mammillary clay-like masses. It has a very s ...
, 05 Meta-aluminite; 10 Butlerite, 10 Parabutlerite; 15 Fibroferrite, 20 Xitieshanite; 25 Botryogen
Botryogen is a hydrous magnesium sulfate mineral with formula: MgFe3+(SO4)2(OH)·7H2O. It is also known as ''quetenite''.
It crystallizes in the monoclinic prismatic system and typically occurs as vitreous bright yellow to red botryoidal to renif ...
, 25 Zincobotryogen
Zincobotryogen is a hydrous sulfate mineral with the chemical formula . It forms bright orange red monoclinic prismatic crystals that exhibit a vitreous to greasy luster. Its specific gravity is 2.201 and it has a Mohs hardness of 2.5.
It is a ...
; 30 Chaidamuite, 30 Guildite
** 07.DD With only medium-sized cations; sheets of edge-sharing octahedra: 05 Basaluminite?, 05 Felsobanyaite, 07.5 Kyrgyzstanite, 08.0 Zn-Schulenbergite; 10 Langite, 10 Posnjakite, 10 Wroewolfeite; 15 Spangolite, 20 Ktenasite, 25 Christelite; 30 Campigliaite, 30 Devilline
Devilline is a sulfate mineral with the chemical formula CaCu4(SO4)2(OH)6•3H2O. The name originates from the French chemist's name, Henri Etienne Sainte-Claire Deville (1818–1881).
Devilline crystallizes in the monoclinic system. Crystallogr ...
, 30 Orthoserpierite, 30 Niedermayrite, 30 Serpierite
Serpierite () is a rare, sky-blue coloured hydrated sulfate mineral, often found as a post-mining product. It is a member of the devilline group, which has members aldridgeite , campigliaite , devilline , kobyashevite , lautenthalite and an ...
; 35 Motukoreaite, 35 Mountkeithite, 35 Glaucocerinite, 35 Honessite, 35 Hydrowoodwardite, 35 Hydrohonessite, 35 Shigaite
Shigaite is a mineral with formula NaAl3(Mn2+)6(SO4)2(OH)18·12H2O that typically occurs as small, hexagonal crystals or thin coatings. It is named for Shiga Prefecture, Japan, where it was discovered in 1985. The formula was significantly revised ...
, 35 Natroglaucocerinite, 35 Wermlandite, 35 Nikischerite, 35 Zincaluminite, 35 Woodwardite, 35 Carrboydite, 35 Zincowoodwardite, 35 Zincowoodwardite-3R, 35 Zincowoodwardite-1T; 40 Lawsonbauerite, 40 Torreyite, 45 Mooreite, 50 Namuwite, 55 Bechererite, 60 Ramsbeckite, 65 Vonbezingite, 70 Redgillite; 75 Chalcoalumite, 75 Nickelalumite*; 80 Guarinoite, 80 Theresemagnanite, 80 Schulenbergite; 85 Montetrisaite
** 07.DE With only medium-sized cations; unclassified: 05 Mangazeite; 10 Carbonatecyanotrichite, 10 Cyanotrichite; 15 Schwertmannite
Schwertmannite is an iron-oxyhydroxysulfate mineral with an ideal chemical formula of or . It is an opaque tetragonal mineral typically occurring as brownish yellow encrustations. It has a Mohs hardness of 2.5 - 3.5 and a specific gravity of 3.77 ...
, 20 Tlalocite
Tlalocite is a rare and complex tellurate mineral with the formula Cu10 Zn6( Te O4)2( Te O3)( O H)25 Cl · 27 H2O. It has a Mohs hardness of 1, and a cyan color. It was named after Tlaloc, the Aztec god of rain, in allusion to the high amount o ...
, 25 Utahite, 35 Coquandite, 40 Osakaite, 45 Wilcoxite, 50 Stanleyite, 55 Mcalpineite, 60 Hydrobasaluminite, 65 Zaherite, 70 Lautenthalite
Lautenthalite is a mineral that was named after its location, Lautenthal, Harz mountains, Germany. It can be found in several slag localities. It was approved by the IMA in 1993. It's a member of the devilline group, and it's the lead analogue of ...
, 75 Camérolaite, 80 Brumadoite
** 07.DF With large and medium-sized cations: 05 Uklonskovite, 10 Kainite
Kainite ( or ) (KMg(SO4)Cl·3H2O) is an evaporite mineral in the class of "Sulfates (selenates, etc.) with additional anions, with H2O" according to the Nickel–Strunz classification. It is a hydrated potassium-magnesium sulfate-chloride, natura ...
, 15 Natrochalcite; 20 Metasideronatrite, 20 Sideronatrite; 25 Despujolsite, 25 Fleischerite, 25 Schaurteite, 25 Mallestigite; 30 Slavikite, 35 Metavoltine; 40 Lannonite, 40 Vlodavetsite; 45 Peretaite
Peretaite is a sulfate of antimony and calcium. The mineral, Ca(SbO)4(SO4)2(OH)2
(2(H2O)), was named Peretaite for its locality. It was first discovered in an antimony-bearing vein at Pereta, Tuscany, Italy.
Occurrence
Peretaite occurs in only ...
, 50 Gordaite
Gordaite is a sulfate mineral composed primarily of hydrous zinc sodium sulfate chloride hydroxide with formula: NaZn4(SO4)(OH)6Cl·6H2O. It was named for the Type locality (geology), discovery location in the Sierra Gorda, Chile, Sierra Gorda dist ...
, 55 Clairite, 60 Arzrunite, 65 Elyite, 70 Yecoraite, 75 Riomarinaite, 80 Dukeite, 85 Xocolatlite
** 07.DG With large and medium-sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3: 05 Darapskite; 10 Clinoungemachite, 10 Ungemachite, 10 Humberstonite; 15 Bentorite
Bentorite is a mineral with the chemical formula Ca6(Cr,Al)2(SO4)3(OH)12·26H2O. It is colored violet to light violet. Its crystals are hexagonal to dihexagonal dipyramidal. It is transparent and has vitreous luster. It has perfect cleavage. It ...
, 15 Charlesite
Charlesite is a sulfate mineral of the ettringite group. Charlesite was named in 1945 after Dr. Charles Palache mineralogist and professor at Harvard University for his work on minerals. This mineral is extremely rare, and when it is found it is ...
, 15 Ettringite
Ettringite is a hydrous calcium aluminium sulfate mineral with formula: . It is a colorless to yellow mineral crystallizing in the trigonal system. The prismatic crystals are typically colorless, turning white on partial dehydration. It is part of ...
, 15 Jouravskite, 15 Sturmanite, 15 Thaumasite
Thaumasite is a calcium silicate mineral, containing Si atoms in unusual octahedron, octahedral configuration, with chemical formula calcium, Ca3silicon, Si(Ohydrogen, H)6(carbon, Coxygen, O3)(sulfur, SO4)·12water, H2O, also sometimes more simply ...
, 15 Carraraite, 15 Buryatite; 20 Rapidcreekite
Rapidcreekite is a rare mineral with formula Ca2(SO4)(CO3)·4H2O. The mineral is white to colorless and occurs as groupings of Acicular (crystal habit), acicular (needle-shaped) crystals. It was discovered in 1983 in northern Yukon, Canada, and des ...
, 25 Tatarskite, 30 Nakauriite, 35 Chessexite; 40 Carlosruizite, 40 Fuenzalidaite; 45 Chelyabinskite*
* 07.E Uranyl Sulfates
** 07.EA Without cations: 05 Uranopilite, 05 Metauranopilite, 10 Jachymovite
** 07.EB With medium-sized cations: 05 Johannite, 10 Deliensite
** 07.EC With medium-sized and large cations: 05 Cobaltzippeite, 05 Magnesiozippeite, 05 Nickelzippeite, 05 Natrozippeite, 05 Zinc-zippeite, 05 Zippeite; 10 Rabejacite, 15 Marecottite, 20 Pseudojohannite
* 07.J Thiosulfates
** 07.JA Thiosulfates with Pb: 05 Sidpietersite
* 07.X Unclassified Strunz Sulfates (Selenates, Tellurates)
** 07.XX Unknown: 00 Aiolosite, 00 Steverustite, 00 Grandviewite, 00 IMA2009-008, 00 Adranosite, 00 Blakeite
Class: chromates
* 07.F Chromates
** 07.FA Without additional anions: 05 Tarapacaite, 10 Chromatite, 15 Hashemite
The Hashemites ( ar, الهاشميون, al-Hāshimīyūn), also House of Hashim, are the royal family of Jordan, which they have ruled since 1921, and were the royal family of the kingdoms of Hejaz (1916–1925), Syria (1920), and Iraq (1921 ...
, 20 Crocoite
Crocoite is a mineral consisting of lead chromate, Pb Cr O4, and crystallizing in the monoclinic crystal system. It is identical in composition with the artificial product chrome yellow used as a paint pigment.
Description
Crocoite is commo ...
** 07.FB With additional O, V, S, Cl: 05 Phoenicochroite
Phoenicochroite, also known as melanochroite, is a lead chromate mineral with formula Pb2OCrO4. It forms striking orange red crystals. It was first discovered in 1839 in Beryozovskoye deposit, Urals, Russia
Russia (, , ), or the Russia ...
, 10 Santanaite, 15 Wattersite
Wattersite is a rare mercury chromate mineral with the formula Hg+14 Hg+2 Cr+6 O6. It occurs in association with native mercury and cinnabar in a hydrothermally altered serpentinite. It was first described from Clear Creek claim, San Benito Coun ...
, 20 Deanesmithite, 25 Edoylerite
** 07.FC With PO4, AsO4, SiO4: 05 Vauquelinite
Vauquelinite is a complex mineral with the formula Cu Pb2( Cr O4)( PO4)(O H) making it a combined chromate and phosphate of copper and lead. It forms a series with the arsenate mineral fornacite.
It was first described in 1818 in the Beryozovs ...
; 10 Fornacite
Fornacite is a rare lead, copper chromate arsenate hydroxide mineral with the formula: Pb2Cu(CrO4)(AsO4)(OH). It forms a series with the phosphate mineral vauquelinite. It forms variably green to yellow, translucent to transparent crystals in t ...
, 10 Molybdofornacite; 15 Hemihedrite, 15 Iranite
Iranite ( Persian: ایرانیت) is a triclinic lead copper chromate silicate mineral with formula Pb10Cu(CrO4)6(SiO4)2(F,OH)2. It was first described from an occurrence in Iran. It is the copper analogue of hemihedrite (Pb10Zn(CrO4)6(SiO4)2 ...
; 20 Embreyite, 20 Cassedanneite;
** 07.FD Dichromates: 05 Lopezite
Class: molybdates, wolframates and niobates
* 07.G Molybdates, wolframates and niobates
** 07.GA Without additional anions or H2O: 05 Fergusonite
Fergusonite is a mineral comprising a complex oxide of various rare-earth elements. The general chemical formula of fergusonite is (Y,REE)NbO4, where REE = rare-earth elements in solid solution with Y. Yttrium is usually dominant (the mineral in ...
-(Ce), 05 Fergusonite-(Nd)N, 05 Fergusonite-(Y), 05 Powellite
Powellite is a calcium molybdate mineral with formula CaMoO4. Powellite crystallizes with tetragonal - dipyramidal crystal structure as transparent adamantine blue, greenish brown, yellow to grey typically anhedral forms. It exhibits distinct cle ...
, 05 Wulfenite
Wulfenite is a lead molybdate mineral with the formula Pb Mo O4. It can be most often found as thin tabular crystals with a bright orange-red to yellow-orange color, sometimes brown, although the color can be highly variable. In its yellow form ...
, 05 Stolzite, 05 Scheelite
Scheelite is a calcium tungstate mineral with the chemical formula Ca W O4. It is an important ore of tungsten (wolfram). Scheelite is originally named after Swedish chemist K. Scheele (1742-1786). Well-formed crystals are sought by collectors a ...
; 10 Formanite-(Y), 10 Iwashiroite-(Y); 15 Paraniite-(Y)
** 07.GB With additional anions and/or H2O: 05 Lindgrenite, 10 Szenicsite, 15 Cuprotungstite, 20 Phyllotungstite, 25 Rankachite, 30 Ferrimolybdite
Ferrimolybdite is a hydrous iron molybdate mineral with formula: Fe3+2(MoO4)3·8(H2O) or Fe3+2(MoO4)3·n(H2O). It forms coatings and radial aggregates of soft yellow needles which crystallize in the orthorhombic system.
Discovery and occurrence
It ...
, 35 Anthoinite, 35 Mpororoite, 40 Obradovicite-KCu, 45 Mendozavilite-NaFe, 45 Paramendozavilite, 50 Tancaite-(Ce)
* 07.H Uranium and uranyl molybdates and wolframates
** 07.HA With U4+: 05 Sedovite, 10 Cousinite, 15 Moluranite
** 07.HB With U6+: 15 Calcurmolite, 20 Tengchongite, 25 Uranotungstite
References
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