Formula: Bi(Co,Ni)2(AsO4)2(OH,H2O)2
Origin of name: Named for the locality, Dump material of the "Am Roten Berg" mining area, about 5 km SW of Schneeberg, Saxony, Germay
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 9.005, b = 6.211, c = 7.44, β = 115.19°
Colour: Brown, beige
Diaphaneity: Transparent
Luster: Subadamantine
Habit: Microscopic crystals, tabular
Hardness: 4-4.5
Specific gravity:
Cleavage: None
Tenacity: Brittle, conchoidal fracture
Streak: Pale brown
Synonyms/varieties:
Comments:
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