VS
Name
—
Na₂(Sb,As)₈S₁₃·2H₂O
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Monoclinic
Crystal system
—
2.5
Mohs hardness
—
3.62
Specific gravity
—
Bright cinnabar-red; powder darkens on exposure
Streak
—
Weakly adamantine
Luster
—
Perfect on {010} and {100}; poor on {001}
Cleavage
—
Cm
Space group
—
—
Structural group
—
Gst · Grandfathered
IMA
—
1956
Named in
—
Cinnabar-red
Typical colors
—
Na · Sb · As · S · H · O
Elements
—