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Phyllosilicate mineral

Properties

Chemical formula

(K,Na,Ca)₂Mn₈(Si,Al)₁₂(O,OH)₃₂·8H₂O

Group

Silicates

Crystal system

—

Hardness (Mohs)

—

Color

—

Luster

—

Streak

—

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

—

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

9.EG.30

Dana classification

—

IMA status

Grandfathered mineral (G)

IMA symbol

Gnp

Locality

🇸🇪 Harstigen mine

Type locality

—

Discovery year

—

Source: Wikidata