VS
Name
—
NaAl(AsO₄)F
Formula
—
Mineral Species
Entry type
—
Arsenates
Chemical class
—
Monoclinic
Crystal system
—
5–5.5
Mohs hardness
—
3.9–4.07
Specific gravity
—
Cream-yellow to pale yellow
Streak
—
Vitreous, usually dull
Luster
—
On {110}, distinct
Cleavage
—
C2/c
Space group
—
Titanite
Structural group
—
Dur · Grandfathered
IMA
—
1869
Named in
—
Pale to dark red-orange, deep red, orange, orange-brown, pale yellow; in transmitted light
Typical colors
—
Na · Al · As · O · F
Elements
—