VS
Name
—
Na₂B₄O₆(OH)₂·3H₂O
Formula
—
Mineral Species
Entry type
—
Borates
Chemical class
—
Monoclinic
Crystal system
—
2.5–3
Mohs hardness
—
1.906
Specific gravity
—
White
Streak
—
Vitreous, satiny on fibrous cleavages
Luster
—
On {100} and {001}, perfect; on {102}, fair
Cleavage
—
P2_1/c
Space group
—
—
Structural group
—
Ker · Grandfathered
IMA
—
1927
Named in
—
White, Colorless, Gray
Typical colors
—
Na · B · O · H
Elements
—