Formula: Ag5-xTe3
Origin of name: for A. Stütz, Austrian mineralogist (1747-1806)
Crystal system: hexagonal
Crystal class: 6/m 2/m 2/m
Twinning:
Unit cell: a = 13.49, c = 8.48
Colour: dark lead-gray, rapidly tarnishes to dark bronze to iridescent
Diaphaneity: opaque
Luster: metallic
Habit: crystals hexagonal equant, modified, rare, massive, compact, granular
Hardness: 3.5
Specific gravity: 8.0
Cleavage: none
Tenacity: brittle
Streak: lead gray
Synonyms/varieties: Stuetzite
Comments:
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