VS
Name
—
KCaCu₅(AsO₄)₄[As(OH)₂O₂]·2H₂O
Formula
—
Mineral Species
Entry type
—
Arsenates
Chemical class
—
Orthorhombic
Crystal system
—
3
Mohs hardness
—
4.011
Specific gravity
—
Pale blue
Streak
—
Vitreous
Luster
—
Good on (100)
Cleavage
—
Pnma
Space group
—
Andyrobertsite
Structural group
—
Carb · Approved
IMA
—
1997
Named in
—
Electric blue; greenish blue in transmitted light
Typical colors
—
K · Ca · Cu · As · O · H
Elements
—