Formula: Ag3AuTe2
Origin of name: for W. Petz, mineral chemist
Crystal system: cubic
Crystal class: 432
Twinning:
Unit cell: a = 10.38 Å
Colour: steel-gray to iron-black
Diaphaneity:
Luster: metallic
Habit: crystals small, intergrown with hessite, rare, massive, fine granular to compact
Hardness: 2.5 to 3
Specific gravity: 8.7 to 9.4
Cleavage: 1; {001} ?
Tenacity: subconchoidal, slightly sec
Streak:
Synonyms/varieties:
Comments:
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