VS
Name
—
Na₀.₃Fe³⁺₂(Si,Al)₄O₁₀(OH)₂·nH₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
1.5–2
Mohs hardness
—
2.2–2.3
Specific gravity
—
greenish-white
Streak
—
Waxy, resinous, dull
Luster
—
{001}, perfect
Cleavage
—
C2/m
Space group
—
Clay, Smectite-vermiculite
Structural group
—
Non · Approved
IMA
—
1827
Named in
—
Green, Yellow, Brown
Typical colors
—
Na · Fe · Si · Al · O · H
Elements
—