VS
Name
—
(K,Sr,Ba,Mn)₁₅₋₁₆(Ca,Na)₃₂[Si₇₀(O,OH)₁₈₀](OH,F)₄·nH₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
5–6
Mohs hardness
—
2.54
Specific gravity
—
white
Streak
—
silky
Luster
—
Good in three directions
Cleavage
—
P2_1/m
Space group
—
—
Structural group
—
Cha · Approved
IMA
—
1977
Named in
—
Purple
Typical colors
—
K · Sr · Ba · Mn · Ca · Na · Si · O · H · F
Elements
—