Formula: PtAs2
Origin of name: for F. Sperry, Canadian chemist
Crystal system: cubic
Crystal class: 2/m -3
Twinning:
Unit cell: a = 5.967 Å
Colour: tin-white
Diaphaneity: opaque
Luster: bright metallic
Habit: crystals cubic or cubo-octahedral, may be highly modified
Hardness: 6 to 7
Specific gravity: 10.46 to 10.6
Cleavage: 1; {001} distinct
Tenacity: conchoidal, brittle
Streak: black
Synonyms/varieties:
Comments:
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