VS
Name
—
Na₇(PO₄)₂F·19H₂O
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Cubic
Crystal system
—
1–2.5
Mohs hardness
—
1.71–1.72
Specific gravity
—
—
Streak
—
Vitreous to greasy, waxy to frosty on exposure
Luster
—
On {111}, imperfect, in slightly altered specimens
Cleavage
—
Fd3c
Space group
—
—
Structural group
—
Nap · Approved
IMA
—
1971
Named in
—
Colorless to white
Typical colors
—
Na · P · O · F · H
Elements
—