|
Liroconite
Liroconite is a complex mineral: Hydrated copper aluminium arsenate hydroxide, with the formula Cu2 Al As O4·4(H2O). It is a vitreous monoclinic mineral, colored bright blue to green, often associated with malachite, azurite, olivenite, and clinoclase. It is quite soft, with a Mohs hardness of 2 - 2.5, and has a specific gravity of 2.9 - 3.0. It was first identified in 1825 in the tin and copper mines of Devon and Cornwall, England. Although it remains quite rare it has subsequently been identified in a variety of locations including France, Germany, Australia, New Jersey and California. The type locality for liroconite is Wheal Gorland in St Day, Cornwall in the United Kingdom. The largest crystal specimen on public display is in the Royal Cornwall Museum in Truro. It occurs as a secondary mineral in copper deposits in association with olivenite, chalcophyllite, clinoclase, cornwallite, strashimirite, malachite, cuprite and limonite. Structure Liroconite crystallizes in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wheal Gorland
Wheal Gorland was a metalliferous mine located just to the north-east of the village of St Day, Cornwall, in England, United Kingdom. It was one of the most important Cornish mines of the late 18th and early 19th centuries, both for the quantity of ore it produced and for the wide variety of uncommon secondary copper minerals found there as a result of supergene enrichment. It is the type locality for the minerals chenevixite, clinoclase, cornwallite, kernowite and liroconite. History The production of the mine was very inconsistent because of the sporadic distribution of its rich ore-bodies: in 1833 George Abbot wrote that it had made profits of over £300,000, produced 1,400 tons of ore per annum, and ranked third, in terms of profits, just behind Dolcoath mine and Consolidated Mines. However, in 1865 Thomas Spargo wrote "now part of St. Day United; idle". In the early 1790s Wheal Gorland was connected to the Great County Adit and its own existing shallow adits were adapte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arsenate Minerals
Arsenate minerals usually refer to the naturally occurring orthoarsenates, possessing the (AsO4)3− anion group and, more rarely, other arsenates with anions like AsO3(OH)2− (also written HAsO42−) (example: pharmacolite Ca(AsO3OH).2H2O) or (very rarely) sO2(OH)2sup>− (example: andyrobertsite). Arsenite minerals are much less common. Both the Dana and the Strunz mineral classifications place the arsenates in with the phosphate minerals. Example arsenate minerals include: * Annabergite Ni3(AsO4)2·8H2O *Austinite CaZn(AsO4)(OH) *Clinoclase Cu3(AsO4)(OH)3 *Conichalcite CaCu(AsO4)(OH) * Cornubite Cu5(AsO4)2(OH)4 *Cornwallite Cu2+5(AsO4)2(OH)2 *Erythrite Co3(AsO4)2·8H2O *Mimetite Pb5(AsO4)3Cl * Olivenite Cu2(AsO4)OH Nickel–Strunz Classification -08- Phosphates 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: **"*" - discredi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated between the Baltic and North seas to the north, and the Alps to the south; it covers an area of , with a population of almost 84 million within its 16 constituent states. Germany borders Denmark to the north, Poland and the Czech Republic to the east, Austria and Switzerland to the south, and France, Luxembourg, Belgium, and the Netherlands to the west. The nation's capital and most populous city is Berlin and its financial centre is Frankfurt; the largest urban area is the Ruhr. Various Germanic tribes have inhabited the northern parts of modern Germany since classical antiquity. A region named Germania was documented before AD 100. In 962, the Kingdom of Germany formed the bulk of the Holy Roman Empire. During the 16th ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuprite
Cuprite is an oxide mineral composed of copper(I) oxide Cu2O, and is a minor ore of copper. Its dark crystals with red internal reflections are in the isometric system hexoctahedral class, appearing as cubic, octahedral, or dodecahedral forms, or in combinations. Penetration twins frequently occur. In spite of its nice color it is rarely used for jewelry because of its low Mohs hardness of 3.5 to 4. It has a relatively high specific gravity of 6.1, imperfect cleavage and is brittle to conchoidal fracture. The luster is sub-metallic to brilliant adamantine. The "chalcotrichite" (from variety typically shows greatly elongated (parallel to 01 capillary or needle like crystals forms. It is a secondary mineral which forms in the oxidized zone of copper sulfide deposits. It frequently occurs in association with native copper, azurite, chrysocolla, malachite, tenorite and a variety of iron oxide minerals.Hurlbut, Cornelius S.; Klein, Cornelis, 1985, ''Manual of Mineralogy,'' 20th ed. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strashimirite
Strashimirite ( IMA symbol: Ssh) is a rare monoclinic mineral containing arsenic, copper, hydrogen, and oxygen. It has the chemical formula Cu8(AsO4)4(OH)4·5(H2O). This mineral was discovered in Zapachitsa (Zapacica) copper deposit, Svoge, Sofia Oblast, Bulgaria in 1960, by the Bulgarian mineralogist Jordanka Minceva-Stefanova. She named the mineral after Strashimir Dimitrov (1892-1960), Professor in Mineralogy and Petrography at Sofia University "St Kliment Ohridski", Bulgaria. The International Mineralogical Association approved it as a new mineral in 1968. It occurs as a secondary mineral phase in the oxidation zone of copper arsenide deposits. It occurs associated with tyrolite, cornwallite, clinoclase, euchroite, olivenite, parnauite, goudeyite, arthurite, metazeunerite, chalcophyllite, cyanotrichite, scorodite, pharmacosiderite, brochantite, azurite, malachite and chrysocolla. Although it remains quite rare, strashimirite has subsequently been identified in a num ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornwallite
Cornwallite is an uncommon copper arsenate mineral with formula Cu5(AsO4)2(OH)4. It forms a series with the phosphate pseudomalachite and is a dimorph of the triclinic cornubite. It is a green monoclinic mineral which forms as radial to fibrous encrustations. Discovery and occurrence It was first described in 1846, for an occurrence in Wheal Gorland, St Day United Mines of the St Day District, Cornwall, England. It occurs as secondary mineral in the oxidized zone of copper sulfide deposits. Associated minerals include olivenite, cornubite, arthurite, clinoclase, chalcophyllite, strashimirite, lavendulan, tyrolite, spangolite, austinite, conichalcite, brochantite, azurite and malachite. See also * Kernowite Kernowite is a mineral which was first described in 2020. It is named for Cornwall, which in the Cornish language is ''Kernow''. Description Kernowite is a complex arsenate mineral with the composition . It was first described in 2020, and is ..., another mineral na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chalcophyllite
Chalcophyllite is a rare secondary copper arsenate mineral occurring in the oxidized zones of some arsenic-bearing copper deposits. It was first described from material collected in Germany. At one time chalcophyllite from Wheal Tamar in Cornwall, England, was called tamarite, but this name is now discredited (not to be confused with the amphibole mineral taramite, which is quite different). At Wheal Gorland a specimen exhibiting partial replacement of liriconite, , by chalcophyllite has been found. The mineral is named from the Greek, ''chalco'' "copper" and ''fyllon'', "leaf", in allusion to its composition and platy structure. It is a classic Cornish mineral that can be confused with tabular spangolite. Formula Two different formulae are quoted in the literature for chalcophyllite, (molar mass 3098 g) and (molar mass 2956 g). The difference reflects the fact that the water content varies at room temperature based on relative humidity. Unit cell Chalcophyllite crystall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truro
Truro (; kw, Truru) is a City status in the United Kingdom, cathedral city and civil parishes in England, civil parish in Cornwall, England. It is Cornwall's county town, sole city and centre for administration, leisure and retail trading. Its population was 18,766 in the 2011 census. People of Truro can be called Truronians. It grew as a trade centre through its port and as a stannary town for tin mining. It became mainland Britain's southernmost city in 1876, with the founding of the Diocese of Truro. Sights include the Royal Cornwall Museum, Truro Cathedral (completed 1910), the Hall for Cornwall and Cornwall's High Court of Justice, Courts of Justice. Toponymy Truro's name may derive from the Cornish language, Cornish ''tri-veru'' meaning "three rivers", but authorities such as the ''Oxford Dictionary of English Place Names'' have doubts about the "tru" meaning "three". An expert on Cornish place-names, Oliver Padel, in ''A Popular Dictionary of Cornish Place-names'', calle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Cornwall Museum
The Royal Cornwall Museum in Truro holds an extensive mineral collection rooted in Cornwall's mining and engineering heritage (including much of the mineral collection of Philip Rashleigh). The county's artistic heritage is reflected in the museum's art collection. Through the Courtney Library the museum also provides a collection of rare books and manuscripts to help with education, research and the discovery of Cornish life and culture. The museum also highlights Cornwall's relationship with the wider world through one of the most significant British emigrations of the 19th century. The museum hosts a permanent exhibition of ancient Egyptian, Greek, and Roman objects, supported by the British Museum. The museum is part of the Royal Institution of Cornwall (RIC), a learned society and registered charity. The Courtney Library The Courtney Library and Archive holds books, periodicals, archive material and ephemera relating to Cornwall and the South West of England. Museum b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornwall
Cornwall (; kw, Kernow ) is a historic county and ceremonial county in South West England. It is recognised as one of the Celtic nations, and is the homeland of the Cornish people. Cornwall is bordered to the north and west by the Atlantic Ocean, to the south by the English Channel, and to the east by the county of Devon, with the River Tamar forming the border between them. Cornwall forms the westernmost part of the South West Peninsula of the island of Great Britain. The southwesternmost point is Land's End and the southernmost Lizard Point. Cornwall has a population of and an area of . The county has been administered since 2009 by the unitary authority, Cornwall Council. The ceremonial county of Cornwall also includes the Isles of Scilly, which are administered separately. The administrative centre of Cornwall is Truro, its only city. Cornwall was formerly a Brythonic kingdom and subsequently a royal duchy. It is the cultural and ethnic origin of the Cornish dias ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
St Day
St Day ( kw, Sen Day) is a civil parishes in England, civil parish and village in Cornwall, England, United Kingdom. It is situated between the village of Chacewater and the town of Redruth. The electoral ward St Day and Lanner, Cornwall, Lanner had a population at the 2011 census of 4,473. St Day is located in a former Mining in Cornwall, mining area (which included Poldice, Tolcarne, Todpool, Creegbrawse and Crofthandy) and accrued considerable wealth from mining. The parish is at the heart of the Cornwall and West Devon Mining Landscape, a World Heritage Site that includes St Agnes, Cornwall, St Agnes, Chapel Porth and Porthtowan. Industrial history St Day was a centre for the richest and perhaps most famous copper mining district in the world from the 16th century to the 1830s. The population, wealth and activity in St Day declined steadily from about 1870 onwards, today the population is smaller than in 1841. It is now essentially a residential village. The Wheal Gorlan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Locality (geology)
Type locality, also called type area, is the locality where a particular rock type, stratigraphic unit or mineral species is first identified. If the stratigraphic unit in a locality is layered, it is called a stratotype, whereas the standard of reference for unlayered rocks is the type locality. The term is similar to the term type site in archaeology or the term type specimen in biology. Examples of geological type localities Rocks and minerals * Aragonite: Molina de Aragón, Guadalajara, Spain * Autunite: Autun, France * Benmoreite: Ben More (Mull), Scotland * Blairmorite: Blairmore, Alberta, Canada * Boninite: Bonin Islands, Japan * Comendite: Comende, San Pietro Island, Sardinia * Cummingtonite: Cummington, Massachusetts * Dunite: Dun Mountain, New Zealand. * Essexite: Essex County, Massachusetts, US * Fayalite: Horta, Fayal Island, Azores, Portugal * Harzburgite: Bad Harzburg, Germany * Icelandite: Thingmuli (Þingmúli), Iceland * Ijolite: Iivaara, Kuusamo, Finl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
