VS
Name
—
Tl₂(Sb,As)₁₀S₁₆
Formula
—
Mineral Species
Entry type
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Sulfosalts
Chemical class
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Orthorhombic
Crystal system
—
—
Mohs hardness
—
4.97
Specific gravity
—
—
Streak
—
Metallic, lively. Anisotropism: Moderate. R1 –R2: (400) 35.9–39.6, (420) 35.2–38.8, (440) 34.5–38.0, (460) 33.7–37.2
Luster
—
—
Cleavage
—
Pna2_1
Space group
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Sartorite
Structural group
—
Pie · Approved
IMA
—
1969
Named in
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Gray-black; in polished section, white, with red internal reflections; dark red in thin section
Typical colors
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Tl · Sb · As · S
Elements
—