VS
Name
—
Na(NaCa)Fe²⁺₅Si₈O₂₂(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
—
Crystal system
—
5–6
Mohs hardness
—
3.46
Specific gravity
—
[White.]
Streak
—
[Vitreous.]
Luster
—
[Perfect on {110}, intersecting at ~56° and ~124°; partings on {100}, {001}.]
Cleavage
—
—
Space group
—
Amphibole
Structural group
—
Frct · Approved
IMA
—
1946
Named in
—
Brown to green
Typical colors
—
Na · Ca · Fe · Si · O · H
Elements
—