Phyllosilicate mineral

Properties

Chemical formula

(K,Na)₄(Mn²⁺,Mg,Zn)₄₈(Si,Al)₇₂(O,OH)₂₁₆·6H₂O

Group

Silicates

Crystal system

—

Hardness (Mohs)

—

Color

Brown

Luster

—

Streak

—

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

—

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

9.EG.40

Dana classification

—

IMA status

Discredited mineral (D)

IMA symbol

Fkp

Locality

🇺🇸 Buckwheat pit

Type locality

—

Discovery year

—

Source: Wikidata