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VS
T
Thermessaite-(NH4)
Name
—
(NH₄)₂AlF₃(SO₄)
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Orthorhombic
Crystal system
—
2.185
Mohs hardness
—
2.185
Specific gravity
—
White
Streak
—
Vitreous
Luster
—
None
Cleavage
—
Pbcn
Space group
—
Thermessaite
Structural group
—
Tms-NH4 · Approved
IMA
—
2011
Named in
—
Colorless to white
Typical colors
—
N · H · Al · F · S · O
Elements
—