Formula: ZnSb2O6
Origin of name: for E. Ordoñez, Mexican geologist
Crystal system: tetragonal
Crystal class: 4/m 2/m 2/m
Twinning: common on {013} repeated
Unit cell: a = 4.667 Å, c = 9.265 Å
Colour: light to dark brown, pearl gray, olive buff to dark olive, light yellow
Diaphaneity:
Luster: adamantine
Habit: crystals tetragonal, small, masses, drusy or stalactitic
Hardness: 6.5
Specific gravity: 6.64
Cleavage: none
Tenacity: conchoidal
Streak:
Synonyms/varieties:
Comments:
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