Formula: KFe2S3
Origin of name: after locality Rasvumchorr deposits, Kola Peninsula, Russia
Crystal system: orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: steel-gray, oxidises dull black
Diaphaneity: opaque
Luster: metallic
Habit: crystals fine acicular, often curved, in aggregates, grains to 2 mm
Hardness: 4.5
Specific gravity: 3.1
Cleavage: 1; {110} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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