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VS
Retgersite
Name
—
Ni(SO₄)·6H₂O
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Tetragonal
Crystal system
—
2.5
Mohs hardness
—
2.04
Specific gravity
—
Pale green
Streak
—
Vitreous
Luster
—
On {001}, perfect; on {110}, in traces, microscopically observed
Cleavage
—
P4_12_12
Space group
—
—
Structural group
—
Rtg · Grandfathered
IMA
—
1949
Named in
—
Deep emerald-green tinged with blue; pale green in transmitted light
Typical colors
—
Ni · S · O · H
Elements
—