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VS
Martinandresite
Name
—
Ba₂(Al₄Si₁₂O₃₂)·10H₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
4.5
Mohs hardness
—
2.482
Specific gravity
—
White
Streak
—
Vitreous to porcelaneous
Luster
—
Indistinct, presumably on {010} and in a direction across (010)
Cleavage
—
Pmmn
Space group
—
—
Structural group
—
Mad · Approved
IMA
—
2017
Named in
—
White or tan
Typical colors
—
Ba · Al · Si · O · H
Elements
—