VS
Name
—
Al₂(PO₄)(OH)₃
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Monoclinic
Crystal system
—
4.5–5
Mohs hardness
—
2.696
Specific gravity
—
White
Streak
—
Vitreous, pearly on perfect {110} cleavage
Luster
—
{110}, perfect; {201}, good; {001} and {101}, imperfect
Cleavage
—
C2/m
Space group
—
—
Structural group
—
Aul · Grandfathered
IMA
—
1868
Named in
—
Colorless to white, may be yellowish to pale rose, greenish; colorless in transmitted light
Typical colors
—
Al · P · O · H
Elements
—