Photo: Wikimedia Commons · Public domain

Mixed oxide from the spinel group with the formula FeO·Cr2O3

Properties

Chemical formula

Fe²⁺Cr₂O₄

Group

Oxides

Crystal system

Cubic

Hardness (Mohs)

5,5

Color

Black

Luster

—

Streak

Brown

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

Fd-3m

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

4.BB.05

Dana classification

7.2.3.3

IMA status

Grandfathered mineral (G)

IMA symbol

Chr

Locality

—

Type locality

—

Discovery year

—

Source: Wikidata