Formula: CuFeSe2
Origin of name: Locality; Eskeborn adit, Harz Mnts., Germany
Crystal system: Cubic
Crystal class: -42m
Twinning:
Unit cell:
Colour: Brass-yellow
Diaphaneity: Opaque
Luster: Metallic
Habit: Crystals tabular, small; embedded grains, microscopic
Hardness: 2.5
Specific gravity: 5.35
Cleavage: 1; {001} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments: Series with chalcopyrite
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