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Cervantite
Cervantite, also formerly known as '' antimony ochre'''' James Dwight Dana A. M., Brush G. J.'' A system of mineralogy : Descriptive mineralogy, comprising the most recent discoveries. — New York : J. Wiley & Sons, 1884. — is an antimony oxide mineral with formula Sb3+Sb5+O4 ( antimony tetroxide). It was first described in 1850 for an occurrence in Cervantes, Galicia, Spain, and named for the locality. The mineral was questioned and disapproved, but re-approved and verified in 1962 based on material from the Zajaca-Stolice district, Brasina, Serbia. It occurs as a secondary alteration product of antimony bearing minerals, mainly stibnite Stibnite, sometimes called antimonite, is a sulfide mineral, a mineral form of antimony trisulfide ( Sb2 S3). It is a soft, metallic grey crystalline solid with an orthorhombic space group. It is the most important source for the metalloid an .... References Antimony minerals Oxide minerals Orthorhombic minerals Minerals in s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antimony Ochre
Antimony ochre (Antimony ocher in American English) or ''ochre of antimony'' (, ) — a partially obsolete trivial name for secondary antimony minerals of the Oxide mineral, oxide class. Antimony ochres most often have the appearance of a powdery brown-yellow to whitish product of weathering (oxidation) of antimonite or native antimony. Usually they are not a pure mineral (one of the ochres), but a mixture of two or more minerals: cervantite, valentinite, romeite, senarmontite, stibiconite, sometimes with an admixture of limonite or quartz. In the mineralogical sense of the word, antimony ochres are a loosely defined group of secondary antimony minerals of the oxide and hydroxide class. The most common antimony ochres are cervantite, romeite, and stibiconite,''Krivovichev V. G.'' Mineralogical glossary. Scientific editor :uk:Булах Андрій Глібович, A. G. Bulakh. — St.Petersburg: St.Petersburg Univ. Publ. House. 2009. — 556 p. — ISBN 978-5-288-04863-0 but th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxide Mineral
The oxide mineral class includes those minerals in which the oxide anion (O2−) is bonded to one or more metal alloys. The hydroxide-bearing minerals are typically included in the oxide class. Minerals with complex anion groups such as the silicates, sulfates, carbonates and phosphates are classed separately. Simple oxides *XO form **Periclase group *** Periclase *** Manganosite **Zincite group *** Zincite *** Bromellite *** Tenorite *** Litharge * form ** Cuprite **Ice * form **Hematite group ***Corundum ***Hematite *** Ilmenite * form **Rutile group ***Rutile *** Pyrolusite *** Cassiterite ** Baddeleyite ** Uraninite ** Thorianite * form **Spinel group ***Spinel ***Gahnite ***Magnetite *** Franklinite ***Chromite ** Chrysoberyl ** Columbite *Hydroxide subgroup: **Brucite ** Manganite ** Romanèchite **Goethite group: *** Diaspore ***Goethite Nickel–Strunz class 4: oxides IMA-CNMNC proposes a new hierarchical scheme (Mills et al., 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxide Minerals
The oxide mineral class includes those minerals in which the oxide anion (O2−) is bonded to one or more metal alloys. The hydroxide-bearing minerals are typically included in the oxide class. Minerals with complex anion groups such as the Silicate mineral, silicates, Sulfate mineral, sulfates, carbonate mineral, carbonates and Phosphate mineral, phosphates are classed separately. Simple oxides *XO form **Periclase group ***Periclase ***Manganosite **Zincite group ***Zincite ***Bromellite ***Tenorite ***Litharge * form **Cuprite **Ice * form **Hematite group ***Corundum ***Hematite ***Ilmenite * form **Rutile group ***Rutile ***Pyrolusite ***Cassiterite **Baddeleyite **Uraninite **Thorianite * form **Spinel group ***Spinel ***Gahnite ***Magnetite ***Franklinite ***Chromite **Chrysoberyl **Columbite *Hydroxide subgroup: **Brucite **Manganite **Romanèchite **Goethite group: ***Diaspore ***Goethite Nickel–Strunz class 4: oxides Internationa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxide Mineral
The oxide mineral class includes those minerals in which the oxide anion (O2−) is bonded to one or more metal alloys. The hydroxide-bearing minerals are typically included in the oxide class. Minerals with complex anion groups such as the silicates, sulfates, carbonates and phosphates are classed separately. Simple oxides *XO form **Periclase group *** Periclase *** Manganosite **Zincite group *** Zincite *** Bromellite *** Tenorite *** Litharge * form ** Cuprite **Ice * form **Hematite group ***Corundum ***Hematite *** Ilmenite * form **Rutile group ***Rutile *** Pyrolusite *** Cassiterite ** Baddeleyite ** Uraninite ** Thorianite * form **Spinel group ***Spinel ***Gahnite ***Magnetite *** Franklinite ***Chromite ** Chrysoberyl ** Columbite *Hydroxide subgroup: **Brucite ** Manganite ** Romanèchite **Goethite group: *** Diaspore ***Goethite Nickel–Strunz class 4: oxides IMA-CNMNC proposes a new hierarchical scheme (Mills et al., 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antimony Tetroxide
Antimony tetroxide is an inorganic compound An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bondsthat is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as ''inorganic chemistry''. Inorgan ... with the formula Sb2O4. This material, which exists as the mineral cervantite, is white but reversibly yellows upon heating. The material, with empirical formula SbO2, is called antimony tetroxide to signify the presence of two kinds of Sb centers. Formation and structure The material forms when Sb2O3 is heated in air:Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. . :Sb2O3 + 0.5 O2 → Sb2O4 ΔH = −187 kJ/mol At 800 °C, antimony(V) oxide loses oxygen to give the same material: :Sb2O5 → Sb2O4 + 0.5 O2 ΔH = −64 kJ/mol The material is mixed valence, containing both Sb(V) and Sb(III) centers. Two polymorphs are known, one orthorhombic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stibnite
Stibnite, sometimes called antimonite, is a sulfide mineral, a mineral form of antimony trisulfide ( Sb2 S3). It is a soft, metallic grey crystalline solid with an orthorhombic space group. It is the most important source for the metalloid antimony. The name is derived from the Greek through the Latin as the former name for the mineral and the element antimony. Structure Stibnite has a structure similar to that of arsenic trisulfide, As2S3. The Sb(III) centers, which are pyramidal and three-coordinate, are linked via bent two-coordinate sulfide ions. However, some studies suggest that the actual coordination polyhedra of antimony are SbS7, with (3+4) coordination at the M1 site and (5+2) at the M2 site. Some of the secondary bonds impart cohesion and are connected with packing. Stibnite is grey when fresh, but can turn superficially black due to oxidation in air. Properties The melting point of Sb2S3 is . The band gap is 1.88 eV at room temperature and it is a pho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brasina
Brasina () is a village in Serbia. It is situated in the Mali Zvornik municipality, in the Mačva District of Central Serbia. The village has a Serb ethnic majority with a population of 1,663 (2002 census). Historical population *1948: 953 *1953: 1,098 *1961: 1,303 *1971: 1,410 *1981: 1,497 *1991: 1,592 *2002: 1,663''In Serbian'' Књига 9, ''Становништво, упоредни преглед броја становника 1948, 1953, 1961, 1971, 1981, 1991, 2002, подаци по насељима'', Републички завод за статистику, Београд, мај 2004, References See also *List of places in Serbia This is the list of populated places in Serbia (excluding Kosovo), as recorded by the 2002 census, sorted alphabetically by municipalities. Settlements denoted as " urban" (towns and cities) are marked bold. Population for every settlement is ... Populated places in Mačva District {{MačvaRS-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orthorhombic Minerals
In crystallography, the orthorhombic crystal system is one of the 7 crystal systems. Orthorhombic lattices result from stretching a cubic lattice along two of its orthogonal pairs by two different factors, resulting in a rectangular prism with a rectangular base (''a'' by ''b'') and height (''c''), such that ''a'', ''b'', and ''c'' are distinct. All three bases intersect at 90° angles, so the three lattice vectors remain mutually orthogonal. Bravais lattices There are four orthorhombic Bravais lattices: primitive orthorhombic, base-centered orthorhombic, body-centered orthorhombic, and face-centered orthorhombic. For the base-centered orthorhombic lattice, the primitive cell has the shape of a right rhombic prism;See , row oC, column Primitive, where the cell parameters are given as a1 = a2, α = β = 90° it can be constructed because the two-dimensional centered rectangular base layer can also be described with primitive rhombic axes. Note that the length a of the prim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antimony Minerals
Antimony is a chemical element; it has symbol Sb () and atomic number 51. A lustrous grey metal or metalloid, it is found in nature mainly as the sulfide mineral stibnite (). Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name kohl. The earliest known description of this metalloid in the West was written in 1540 by Vannoccio Biringuccio. China is the largest producer of antimony and its compounds, with most production coming from the Xikuangshan Mine in Hunan. The industrial methods for refining antimony from stibnite are roasting followed by reduction with carbon, or direct reduction of stibnite with iron. The most common applications for metallic antimony are in alloys with lead and tin, which have improved properties for solders, bullets, and plain bearings. It improves the rigidity of lead-alloy plates in lead–acid batteries. Antimony trioxide is a prominent additive for haloge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serbia
, image_flag = Flag of Serbia.svg , national_motto = , image_coat = Coat of arms of Serbia.svg , national_anthem = () , image_map = , map_caption = Location of Serbia (green) and the claimed but uncontrolled territory of Kosovo (light green) in Europe (dark grey) , image_map2 = , capital = Belgrade , coordinates = , largest_city = capital , official_languages = Serbian language, Serbian , ethnic_groups = , ethnic_groups_year = 2022 , religion = , religion_year = 2022 , demonym = Serbs, Serbian , government_type = Unitary parliamentary republic , leader_title1 = President of Serbia, President , leader_name1 = Aleksandar Vučić , leader_title2 = Prime Minister of Serbia, Prime Minister , leader_name2 = Đuro Macut , leader_title3 = Pres ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galicia (Spain)
Galicia ( ; or ; ) is an Autonomous communities of Spain, autonomous community of Spain and nationalities and regions of Spain, historic nationality under Spanish law. Located in the northwest Iberian Peninsula, it includes the provinces of Spain, provinces of La Coruña (province), A Coruña, Lugo (province), Lugo, Ourense (province), Ourense, and Pontevedra (province), Pontevedra. Galicia is located in Atlantic Europe. It is bordered by Portugal to the south, the Spanish autonomous communities of Castile and León and Asturias to the east, the Atlantic Ocean to the west, and the Cantabrian Sea to the north. It had a population of 2,705,833 in 2024 and a total area of . Galicia has over of coastline, including its offshore islands and islets, among them Cíes Islands, Ons Island, Ons, Sálvora, Cortegada Island, which together form the Atlantic Islands of Galicia National Park, and the largest and most populated, A Illa de Arousa. The area now called Galicia was first in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
