VS
Name
—
Mg₁₇Si₂₀O₅₄(OH)₆
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
2.25
Mohs hardness
—
3.08
Specific gravity
—
—
Streak
—
—
Luster
—
Perfect on {110}, intersecting at ~45° and 135±; breakage along {100} and {010} may be due to parting
Cleavage
—
A2_1ma
Space group
—
—
Structural group
—
Chs · Approved
IMA
—
1977
Named in
—
Colorless to very light pinkish brown; in thin section, colorless
Typical colors
—
Mg · Si · O · H
Elements
—