Photo: Henk Smeets – tomeikminerals.com · CC BY 4.0

Tectosilicate mineral

Properties

Chemical formula

Na₈(Al₆Si₆)O₂₄(SO₄)·2H₂O

Group

Silicates

Crystal system

Hexagonal

Hardness (Mohs)

—

Color

Colorless

Luster

—

Streak

White

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

P6₃

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

9.FB.05

Dana classification

76.2.5.15

IMA status

Grandfathered mineral (G)

IMA symbol

Vhn

Locality

🇷🇺 Vishnevye mountains

Type locality

—

Discovery year

—

Source: Wikidata