VS
Name
—
Mg₀.₇(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄·8H₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
1.5
Mohs hardness
—
2.2–2.6
Specific gravity
—
white
Streak
—
Dull to pearly, bronzy
Luster
—
{001}, perfect, typically relic
Cleavage
—
Cc
Space group
—
Clay, Smectite-vermiculite
Structural group
—
Vrm · Grandfathered
IMA
—
1824
Named in
—
Brown, Yellow, Green
Typical colors
—
Mg · Fe · Al · Si · O · H
Elements
—