Photo: Robert M. Lavinsky · CC BY-SA 3.0

Hydrous potassium uranyl silicate mineral

Properties

Chemical formula

(K,Na)(UO₂)(SiO₃OH)·1.5H₂O

Group

Silicates

Crystal system

Monoclinic

Hardness (Mohs)

—

Color

Yellow

Luster

—

Streak

White

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

—

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

9.AK.15

Dana classification

—

IMA status

Grandfathered mineral (G)

IMA symbol

Bwd

Locality

—

Type locality

—

Discovery year

—

Source: Wikidata