VS
Name
—
(Na,Pb,Ca,REE,U)₂Nb₂O₆F
Formula
—
Mineral Species
Entry type
—
Halides
Chemical class
—
Cubic
Crystal system
—
4–4.5
Mohs hardness
—
5.275
Specific gravity
—
Light yellow
Streak
—
Adamantine
Luster
—
None
Cleavage
—
Fd-3m
Space group
—
Pyrochlore-Pyrochlore
Structural group
—
Fnpcl · Approved
IMA
—
2013
Named in
—
Brownish yellow to reddish orange
Typical colors
—
Na · Pb · Ca · REE · U · Nb · O · F
Elements
—