Formula: NiSe
Origin of name: for J. Sederholm, Finnish geologist
Crystal system: hexagonal
Crystal class: 6/m 2/m 2/m
Twinning:
Unit cell:
Colour: yellow to orange yellow (polished section)
Diaphaneity: opaq;ue
Luster:
Habit: massive, embedded grains
Hardness:
Specific gravity: 7.06
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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