Geographic Minerals

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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