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VS
Muthmannite
Name
—
AuAgTe₂
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Monoclinic
Crystal system
—
2.5
Mohs hardness
—
11.04
Specific gravity
—
Black to gray-black
Streak
—
Bright metallic
Luster
—
One perfect, in zone of elongation
Cleavage
—
P2/m
Space group
—
—
Structural group
—
Mma · Grandfathered
IMA
—
1911
Named in
—
Brassy yellow to pale bronze, pale gray on fresh fracture surface; pale gray in reflected light
Typical colors
—
Au · Ag · Te
Elements
—