VS
Name
—
Fe³⁺₆(PO₄)₄O(OH)₄·6H₂O
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Monoclinic
Crystal system
—
3–4
Mohs hardness
—
2.8–3.08
Specific gravity
—
Olive-drab when fresh; yellow, brownish yellow on exposure
Streak
—
Vitreous, pearly on cleavages, resinous on fractures
Luster
—
On {100}, good
Cleavage
—
C2/c
Space group
—
Beraunite
Structural group
—
Bru · Grandfathered
IMA
—
1841
Named in
—
Dull greenish to greenish brown when fresh, may be color banded; reddish brown to hyacinth-red
Typical colors
—
Fe · P · O · H
Elements
—