Photo: Modris Baum · Public domain

Titanium-iron(II) oxide mineral

Properties

Chemical formula

Fe²⁺Ti⁴⁺O₃

Group

Oxides

Crystal system

Trigonal

Hardness (Mohs)

5,5

Color

Black

Luster

—

Streak

Black

Density

4,72 g/cm³

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

R-3

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

4.CB.05

Dana classification

4.3.5.1

IMA status

Grandfathered mineral (G)

IMA symbol

Ilm

Locality

🇷🇺 Ilmen Nature Reserve

Type locality

—

Discovery year

—

Source: Wikidata