Cyclosilicate mineral

Properties

Chemical formula

Na₁₅(Na,Ca,Ce)₃(Mn,Ca)₃Fe₃Zr₃Si₂₆O₇₂(OH,O)₄Cl·H₂O

Group

Silicates

Crystal system

Trigonal

Hardness (Mohs)

—

Color

Brown

Luster

—

Streak

White

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

—

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

9.CO.10

Dana classification

64.1.3.3

IMA status

Approved mineral and/or valid name (A)

IMA symbol

Vrk

Locality

🇷🇺 Alluaiv Mountain

Type locality

—

Discovery year

—

Source: Wikidata