Formula: Bi2Se2Te
Origin of name: for George Skippen, Canadian geologist
Crystal system: hexagonal
Crystal class: -3 2/m
Twinning:
Unit cell:
Colour: steel-gray
Diaphaneity:
Luster: metallic
Habit: lamellar crystals 0.2 to 1 mm long in massive aggregates
Hardness: 2.5
Specific gravity: 7.94
Cleavage: 1; {0001} perfect
Tenacity:
Streak: black
Synonyms/varieties:
Comments:
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