Compare Minerals
Put any two minerals side by side — formula, structure, hardness, density and more. Type to search each slot.
Name
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NaCa₂(Fe²⁺₄Al)(Si₆Al₂)O₂₂(OH)₂
Formula
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Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
5–6
Mohs hardness
—
3.44
Specific gravity
—
—
Streak
—
[Vitreous.]
Luster
—
[Perfect on {110}, with intersections at ~56° and ± »124; partings on {100}, {001}.]
Cleavage
—
—
Space group
—
Amphibole
Structural group
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Fprg · Approved
IMA
—
1961
Named in
—
Bluish green in thin section
Typical colors
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Na · Ca · Fe · Al · Si · O · H
Elements
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