Formula: Pt(Sb,Bi)
Origin of name: for E. Stumpf, Austrian professor
Crystal system: hexagonal
Crystal class: 6/m 2/m 2/m
Twinning:
Unit cell:
Colour: cream in reflected light
Diaphaneity: opaque
Luster: metallic
Habit: microscopic masses
Hardness: about 5
Specific gravity: 13.52
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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