VS
Name
—
Bi₄Te₃
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Hexagonal
Crystal system
—
—
Mohs hardness
—
8.4
Specific gravity
—
—
Streak
—
Metallic. Anisotropism: Noticeable. R1 –R2: (400) 61.6–62.9, (420) 62.3–63.4, (440) 62.8–64.0, (460) 63.2–64.4
Luster
—
—
Cleavage
—
R-3m
Space group
—
Tetradymite
Structural group
—
Pse · Approved
IMA
—
1853
Named in
—
Tin-white to pale steel-gray
Typical colors
—
Bi · Te
Elements
—