VS
Name
—
(Ca₃REE)Na₃Nb(Si₂O₇)₂(OF)F₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
5
Mohs hardness
—
3.45
Specific gravity
—
—
Streak
—
Vitreous
Luster
—
{011}, good
Cleavage
—
P2_1/a
Space group
—
Seidozerite-Rinkite
Structural group
—
Nns-Ce · Approved
IMA
—
1987
Named in
—
Colorless
Typical colors
—
Ca · REE · Na · Nb · Si · O · F
Elements
—