VS
Name
—
NaCa₂(Mg₃AlTi⁴⁺)(Si₆Al₂)O₂₂O₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
5–6
Mohs hardness
—
3.2–3.28
Specific gravity
—
white
Streak
—
Vitreous
Luster
—
Perfect on {110}, intersecting at 56± and 124±; partings on {100}, {001}
Cleavage
—
C2/m
Space group
—
Amphibole
Structural group
—
Krs · Approved
IMA
—
1893
Named in
—
Brown, Black
Typical colors
—
Na · Ca · Mg · Al · Ti · Si · O
Elements
—