VS
Name
—
Ni₂Fe³⁺O₂(BO₃)
Formula
—
Mineral Species
Entry type
—
Borates
Chemical class
—
Orthorhombic
Crystal system
—
—
Mohs hardness
—
5.17
Specific gravity
—
—
Streak
—
—
Luster
—
—
Cleavage
—
Pbam
Space group
—
Ludwigite
Structural group
—
Bna · Approved
IMA
—
1974
Named in
—
Reddish brown; in reflected light, gray with brownish tinge, with strong reddish brown internal reflections
Typical colors
—
Ni · Fe · O · B
Elements
—