Transitional structure between phyllosilicate and other silicate unit, mineral

Properties

Chemical formula

(Cs,Na,K)Na₆[Be₂Al₃Si₁₅O₃₉]F₂

Group

Silicates

Crystal system

Trigonal

Hardness (Mohs)

—

Color

—

Luster

—

Streak

—

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

P-3m1

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

9.EH.25

Dana classification

78.7.10.2

IMA status

Approved mineral and/or valid name (A)

IMA symbol

Tys

Locality

🇹🇯 Darai-Pioz glacier

Type locality

—

Discovery year

—

Source: Wikidata