Formula: Zn2(Te3O8)
Origin of name: Zinc analogue of spiroffite
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 12.72 Å, b = 5.15 Å, c = 11.82 Å, β=99.2°
Colour: Gray
Diaphaneity: Translucent
Luster: Vitreous
Habit: Crystalline aggregates, thin films
Hardness: 2.5
Specific gravity: 5.57 (calculated)
Cleavage:
Tenacity: Brittle, uneven/irregular fracture
Streak: Dark green
Synonyms/varieties:
Comments: Secondary co-oxidation of calaverite. IMA approved 2002
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