VS
Name
—
(Na )Nb₂Na₃Ti(Si₂O₇)₂O₂(OH)₂(H₂O)₄
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Triclinic
Crystal system
—
1.5–3
Mohs hardness
—
2.65–2.89
Specific gravity
—
—
Streak
—
Pearly to silky
Luster
—
Perfect on {001}, distinct on {110}
Cleavage
—
P-1
Space group
—
Seidozerite-Lamprophyllite
Structural group
—
Epi · Approved
IMA
—
1901
Named in
—
White, gray, yellow-gray, tan, light brown; in thin section, colorless
Typical colors
—
Na · Nb · Ti · Si · O · H
Elements
—