VS
Name
—
K₃Na₄(Fe,Mn,Ti)₂Si₈O₂₀(OH,O)₄·4H₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Triclinic
Crystal system
—
2–3
Mohs hardness
—
2.75
Specific gravity
—
White
Streak
—
Vitreous
Luster
—
{100} and {010}, perfect
Cleavage
—
P-1
Space group
—
Ershovite
Structural group
—
Esh · Approved
IMA
—
1991
Named in
—
Olive-green with brown and yellow tinges
Typical colors
—
K · Na · Fe · Mn · Ti · Si · O · H
Elements
—