VS
Name
—
Ca(Y,Th)Al₅(SiO₄)₂(PO₄)₂(OH)₇·6H₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Tetragonal
Crystal system
—
3.5–4
Mohs hardness
—
3.07–3.15
Specific gravity
—
—
Streak
—
Dull to greasy
Luster
—
—
Cleavage
—
—
Space group
—
—
Structural group
—
Syk-Y · Approved
IMA
—
1964
Named in
—
White
Typical colors
—
Ca · Y · Th · Al · Si · O · P · H
Elements
—