VS
Name
—
Ca₃Al₇.₇Si₃P₄O₂₃.₅(OH)₁₄.₁·8H₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Hexagonal
Crystal system
—
5
Mohs hardness
—
2.64
Specific gravity
—
White
Streak
—
Dull, vitreous on cleavage surface
Luster
—
Imperfect on {0001}
Cleavage
—
P-3m1
Space group
—
Perhamite
Structural group
—
Phm · Approved
IMA
—
1975
Named in
—
Light brown, white
Typical colors
—
Ca · Al · Si · P · O · H
Elements
—