VS
Name
—
NaNa₂(Mg₃Al₂)(Si₇Al)O₂₂(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
5–6
Mohs hardness
—
3.04
Specific gravity
—
—
Streak
—
[Vitreous.]
Luster
—
[Perfect on {110}.]
Cleavage
—
C2/m
Space group
—
Amphibole
Structural group
—
Nyb · Approved
IMA
—
1981
Named in
—
[Bluish.]
Typical colors
—
Na · Mg · Al · Si · O · H
Elements
—