schmiederite

Also known as schmeiderite

Schmiederite is a secondary mineral in the oxidized zone of selenium-bearing hydrothermal base metal deposits. Its chemical formula is Pb2Cu2(Se4+O3)(Se6+O4)(OH)4.

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Country: Argentina
Image: Schmiederite-107145.jpg

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Commons category: Schmiederite
Nickel-Strunz 9th edition (updated 2009): 7.BC.65
Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 7.BC.65
streak color: light blue
crystal system: monoclinic crystal system
IMA Mineral Symbol: Scm
chemical formula: Cu₂Pb₂(Se⁴⁺O₃)(Se⁶⁺O₄)(OH)₄
Strunz 8th edition (series ID, updated): VI/B.02

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Schmiederite is a secondary mineral in the oxidized zone of selenium-bearing hydrothermal base metal deposits. Its chemical formula is Pb2Cu2(Se4+O3)(Se6+O4)(OH)4.

It was first described in 1962 for an occurrence in the Cóndor mine, Los Llantenes district, Sierra de Cacheuta, La Rioja Province, Argentina (type locality). It was named for Oscar Schmieder (1891–1980), German geographer.

Excerpted from Wikipedia’s “schmiederite” article, available under the CC BY-SA 4.0 licence.