Miersite

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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