VS
Name
—
Ca₃Mn⁴⁺(SO₄)(CO₃)(OH)₆·12H₂O
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Hexagonal
Crystal system
—
2.5
Mohs hardness
—
1.81–1.95
Specific gravity
—
—
Streak
—
[Vitreous.]
Luster
—
On {1010}, good
Cleavage
—
P6_3
Space group
—
Ettringite
Structural group
—
Jou · Approved
IMA
—
1965
Named in
—
Greenish yellow to greenish orange, pink (aluminous); bright yellow in transmitted light
Typical colors
—
Ca · Mn · S · O · C · H
Elements
—