VS
Name
—
FeAs₂
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Orthorhombic
Crystal system
—
5–5.5
Mohs hardness
—
7.4
Specific gravity
—
Grayish black
Streak
—
Metallic. Anisotropism: Strong. R1 –R2: (400) 51.6–59.7, (420) 52.0–59.9, (440) 52.6–59.8, (460) 53.1–58.8
Luster
—
Rarely distinct on {010}, {101}
Cleavage
—
Pnnm
Space group
—
Löllingite
Structural group
—
Lö · Grandfathered
IMA
—
1845
Named in
—
Steel-gray to silver-white
Typical colors
—
Fe · As
Elements
—