VS
Name
—
CaCuFe³⁺(AsO₄)₂(OH,H₂O)₂
Formula
—
Mineral Species
Entry type
—
Arsenates
Chemical class
—
Triclinic
Crystal system
—
5
Mohs hardness
—
4.18
Specific gravity
—
Light yellow
Streak
—
Dull for aggregates to subadamantine on fracture surfaces
Luster
—
None
Cleavage
—
P-1
Space group
—
Helmutwinklerite
Structural group
—
Lkr · Approved
IMA
—
1999
Named in
—
Yellow
Typical colors
—
Ca · Cu · Fe · As · O · H
Elements
—