True mica, phyllosilicate mineral

Properties

Chemical formula

(Ba,Na,K)(Al,Mg)₂(AlSi₃O₁₀)(OH)₂

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.EC.15

Dana classification

—

IMA status

Approved mineral and/or valid name (A)

IMA symbol

Gtr

Locality

🇨🇭 Wasenalp

Type locality

—

Discovery year

—

Source: Wikidata