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

Sulfate mineral

Properties

Chemical formula

(Cu₁-ₓAlₓ)(SO₄)ₓ/₂(OH)₂ · nH₂O (x < 0.5, n < 3x/2)

Group

Sulfates

Crystal system

Hexagonal

Hardness (Mohs)

—

Color

—

Luster

—

Streak

—

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

—

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

7.DD.35

Dana classification

31.2.2.1

IMA status

Grandfathered mineral (G)

IMA symbol

Wwd

Locality

—

Type locality

—

Discovery year

—

Source: Wikidata