Formula: (Ag,Cu)I
Origin of name: For Henry Miers, English mineralogist
Crystal system: Cubic
Crystal class: -43m
Twinning: On {111}
Unit cell: a = 6.504 Å
Colour: Canary-yellow
Diaphaneity:
Luster: Adamantine
Habit: Crystals tetrahedral or rarely cubo-octahedral; crusts; aggregates
Hardness: 2.5
Specific gravity: 5.64
Cleavage: 1; {001} perfect
Tenacity: Conchoidal; brittle
Streak: Canary yellow
Synonyms/varieties:
Comments:
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