Photo: John Krygier · Public domain

True mica, phyllosilicate mineral

Properties

Chemical formula

KMg₂Al(Al₂Si₂O₁₀)(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.20

Dana classification

—

IMA status

Redefined mineral (Rd)

IMA symbol

Eas

Locality

🇺🇸 Easton

Type locality

—

Discovery year

—

Source: Wikidata