Photo: Robert M. Lavinsky · CC BY-SA 3.0

Sorosilicate mineral

Properties

Chemical formula

CaFe³⁺Fe²⁺₂(Si₂O₇)O(OH)

Group

Silicates

Crystal system

Orthorhombic

Hardness (Mohs)

—

Color

—

Luster

—

Streak

Black

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

P2₁/a

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

9.BE.07

Dana classification

56.2.3.3

IMA status

Grandfathered mineral (G)

IMA symbol

Ilv

Locality

🇮🇹 Elba

Type locality

—

Discovery year

—

Source: Wikidata