VS
Name
—
(Na,Ca)₉Fe²⁺Ce₂(Si,Be)₂₀(O,OH,F)₄₈
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
3.5–4
Mohs hardness
—
3.14
Specific gravity
—
—
Streak
—
Vitreous, to dull when altered
Luster
—
—
Cleavage
—
P4_2/n
Space group
—
—
Structural group
—
Smv-Ce · Approved
IMA
—
1971
Named in
—
Brown or orange-brown to grey or reddish brown when altered; colorless to greyish brown in thin section
Typical colors
—
Na · Ca · Fe · Ce · Si · Be · O · H · F
Elements
—