Mineralpedia Details for Arsenogorceixite

Named in reference to the mineral as being the arsenate analogue of gorceixite. It is a rare mineral that occurs at the type locality in the Clara mine in the Black Forest of Germany as a secondary mineral in oxidized hydrothermal polymetallic baryte-fluorite deposits. Additional localities include in Australia, the United States, England, Italy, Greece, France, and Belgium. Associated minerals include arsenogoyazite, brochantite, agardite, malachite, barian pharmacosiderite, olivenite, fluorite, baryte, limonite, quartz, mimetite, adamite, beudantite, and tsumcorite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/arsenogorceixite.pdf

Formula

BaAl₃(AsO₃OH)AsO₄(OH)₆ 

Crystal System

Trigonal 

Cleavage

None, None, None 

Luster

Vitreous (Glassy) 

Color

white, yellow, bluish, colorless 

Streak

white 

Class

Trigonal - Hexagonal Scalenohedral 

Hardness

4 

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Mindat

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This mineral, the arsenic analogue of Gorceixite, occurs at Clara as spherulitic crystals coating Quartz much like this specimen. Good rich blue coverage from the type locality.