VS
Name
—
Na₂(Ti,Fe³⁺)Si₄(O,F)₁₁
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Tetragonal
Crystal system
—
5.5–7
Mohs hardness
—
2.64–2.83
Specific gravity
—
White
Streak
—
Vitreous, pearly on {110}
Luster
—
{100} and {110}, good
Cleavage
—
I4/m
Space group
—
—
Structural group
—
Nar · Approved
IMA
—
1901
Named in
—
Honey-yellow to lemon-yellow, reddish brown, brownish gray, tan, pink, may be zoned; green from inclusions
Typical colors
—
Na · Ti · Fe · Si · O · F
Elements
—