Geographic Minerals

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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Arsenolite: Properties and Occurrence

Arsenolite: Properties and Occurrence

Arsenolite is an arsenic mineral, chemical formula As4O6. It is formed as an oxidation product of arsenic sulfides. It is an uncommon mineral that occurs as a product of the oxidization of arsenic-bearing sulfides in hydrothermal veins and can be formed during mine fires and in burning coal seams.....

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Arsenoclasite

Arsenoclasite

Arsenoclasite (originally arsenoklasite) is a red or dark orange-brown mineral with formula Mn5(AsO4)2(OH)4. It is a mineral consisting of a basic manganese arsenate. It is containing arsenic, hydrogen, manganese, and oxygen. It is not radioactive. The mineral was discovered in 1931 in Långban, .....

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Arseniosiderite: Properties and Occurrence

Arseniosiderite: Properties and Occurrence

Arseniosiderite (formula- Ca2Fe3+3(AsO4)3O2·3H2O) is a rare arsenate mineral formed by the oxidation of other arsenic-containing minerals, such as scorodite or arsenopyrite. It is a rare secondary mineral formed by the oxidation of earlier arsenic-bearing minerals, typically scorodite or arsenop.....

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Arsenic: Properties and Occurrence

Arsenic: Properties and Occurrence

Arsenic is a chemical element with symbol ‘As’ and atomic number 33. The element takes its name from the Latin word “arsenicum” or the Greek word “arrenikos” meaning masculine, alluding to the mineral’s potent properties. It occurs in many minerals, usually in combination with sulfu.....

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Armalcolite: Properties and Occurrence

Armalcolite: Properties and Occurrence

Armalcolite is a titanium-rich mineral with the chemical formula (Mg, Fe2+)Ti2O5. These tiny gray crystals were named for astronauts Armstrong, Aldrin, and Collins, who collected them on the moon. A few samples have been mined on Earth. It is not Radioactive. It was first found at Tranquility Bas.....

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