Geographic Minerals

Aubertite

Aubertite

Aubertite is a mineral with the chemical formula CuAl(SO4)2Cl·14H2O. It is named after the French geophysicist J. Aubert, who was the first to collect samples of this mineral. It appears as an azure blue mineral, which is soluble in water. The sample was collected by J. Aubert (born 1929), assis.....

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Atheneite: Properties and Occurrence

Atheneite: Properties and Occurrence

Atheneite is a rare palladium, mercury arsenide mineral with formula (Pd, Hg)3As associated with palladium-gold deposits. It is not radioactive. It was named after the Greek goddess Pallas Athene, in allusion to its palladium content. Atheneite is an opaque gray-white mineral with a metallic lust.....

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Athabascaite: Properties and Occurrence

Athabascaite: Properties and Occurrence

Athabascaite is a member of the copper selenide minerals and forms with other copper selenides. It was first discovered by S. Kaiman in 1949 while he was researching radioactive materials around Lake Athabasca. Kaiman was conducting research near Uranium City, Saskatchewan where mass amounts of u.....

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Atacamite: Properties and Occurrence

Atacamite: Properties and Occurrence

Atacamite is a copper halide mineral: a copper(II) chloride hydroxide with formula Cu2Cl(OH)3. It is an unusual and attractive halide mineral. It is polymorphous with two other minerals; paratacamite and botallackite. It was first described for deposits in the Atacama Desert of Chile in 1801 by D.....

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Astrophyllite: Properties and Occurrence

Astrophyllite: Properties and Occurrence

Astrophyllite [Formula: (K, Na)3(Fe++, Mn)7Ti2Si8O24(O, OH)7] is a very rare, brown to golden-yellow hydrous potassium iron titanium silicate mineral. It is a unique and rare formation of titanium silicate. Its name comes from a Greek word meaning “star leaf” because that is what the formatio.....

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Asisite: Properties and Occurrence

Asisite: Properties and Occurrence

Asisite (Formula- Pb7SiO8Cl2) is a yellow tetragonal mineral. It is a very rare lead oxyhalide found only at the Kombat mine. Asisite was named after the Asis farm located at the Kombat mine, Namibia. It is found at Kombat Mine, Kombat, Grootfontein District, Otjozondjupa Region, Namibia. It was .....

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Ashoverite

Ashoverite

Ashoverite is one of three polymorphs of zinc hydroxide, Zn(OH)2. It is a rare mineral first found in a limestone quarry near Ashover, Derbyshire, England, in 1988. It has also been found in the Harz mountain range in Germany, and in Namibia. The mineral was discovered after samples of the polymo.....

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Ashburtonite

Ashburtonite

Ashburtonite is a rare lead copper silicate-bicarbonate mineral with formula: HPb4Cu2+4Si4O12 (HCO3)4(OH)4Cl. It contains tetragonal-dipyramidal blue mineral containing carbon, chlorine, copper, hydrogen, lead, oxygen, and silicon. It is not radioactive. It occurs at the type locality at a weathe.....

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Artroeite: Properties and Occurrence

Artroeite: Properties and Occurrence

Artroeite, formula – [PbAlF3(OH)2] is a mineral found in Arizona. It is named for the late American chemist Arthur Roe (1912–1993). The structure was solved by direct methods and refined to R = 0.022 using X-ray diffractometer data (1096 independent reflections). In the structure, edge-s.....

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Artinite

Artinite

Artinite is a hydrated magnesium carbonate mineral with formula: Mg2(CO3)(OH)2·3H2O. It is a somewhat rare carbonate mineral. It forms as a crust of acicular to fibrous crystal aggregates sometimes collected into tight perfectly spherical balls. In fact, a specimen of artinite without serpentine.....

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Arthurite: Properties and Occurrence

Arthurite: Properties and Occurrence

Arthurite is a mineral composed of divalent copper and iron ions in combination with trivalent arsenate, phosphate and sulfate ions with hydrogen and oxygen. It is a rare copper iron arsenate. Localities include in England, Germany, Portugal, Spain, Chile, the United States, and Australia among a.....

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Arsenopyrite: Properties and Occurrence

Arsenopyrite: Properties and Occurrence

Arsenopyrite is an iron arsenic sulfide (FeAsS). It is the most prevalent mineral containing the element arsenic. It is an iron arsenic sulfide mineral which is the most common arsenic-bearing mineral found worldwide. The mineral was named for the presence of arsenic in its composition. Arsenopyr.....

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