Formula: Ni3Se4
Origin of name: for Otto Trüstedt, Finnish geologist
Crystal system: cubic
Crystal class: 4/m -3 2/m
Twinning:
Unit cell:
Colour: yellowish in reflected light
Diaphaneity:
Luster: metallic
Habit: crystals euhedral, minute
Hardness: about 2.5
Specific gravity: 6.62
Cleavage:
Tenacity:
Streak:
Synonyms/varieties:
Comments: dimorphous with wilkmanite
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