Photo: David Hospital · CC BY 4.0

Sorosilicate mineral

Properties

Chemical formula

Pb₉Ca₅Mn(Si₂O₇)₄(SiO₄)O

Group

Silicates

Crystal system

Hexagonal

Hardness (Mohs)

—

Color

—

Luster

—

Streak

—

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

trigonal-dipyramidal

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

9.BG.25

Dana classification

78.2.1.1

IMA status

Grandfathered mineral (G)

IMA symbol

Gnm

Locality

🇸🇪 Långban

Type locality

—

Discovery year

—

Source: Wikidata