VS
Name
—
Ca(Si₆Al₂)O₁₆·4H₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
4.5–5
Mohs hardness
—
2.2–2.23
Specific gravity
—
White
Streak
—
Vitreous to pearly, iridescent on {010}. Streak: White
Luster
—
{401}, {100} distinct, {101} imperfect; parting on {010}
Cleavage
—
—
Space group
—
—
Structural group
—
Yug · Approved
IMA
—
1952
Named in
—
Colorless, White, Yellow
Typical colors
—
Ca · Si · Al · O · H
Elements
—