VS
Name
—
Bi₂Te₃
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Hexagonal
Crystal system
—
1.5–2
Mohs hardness
—
7.815
Specific gravity
—
Pale lead-gray
Streak
—
Metallic, splendent on fresh cleavages. Anisotropism: Weak. R1 –R2: (400) 62.3–62.9, (420) 62.4–63.4, (440) 62.4–63.8
Luster
—
Perfect on {0001}
Cleavage
—
R3m
Space group
—
Tetradymite
Structural group
—
Tbi · Grandfathered
IMA
—
1863
Named in
—
Pale lead-gray; in polished section, white
Typical colors
—
Bi · Te
Elements
—