VS
Name
—
K₂Na(Fe²⁺₄Mg₂Na)Ti₂(Si₄O₁₂)₂O₂(OH)₄
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
3
Mohs hardness
—
3.161
Specific gravity
—
White to yellowish white
Streak
—
Vitreous
Luster
—
Perfect on {001}, moderate on {010}
Cleavage
—
A2
Space group
—
Astrophyllite-Devitoite
Structural group
—
Lbv · Approved
IMA
—
1963
Named in
—
Straw-yellow to orange
Typical colors
—
K · Na · Fe · Mg · Ti · Si · O · H
Elements
—