Photo: Leon Hupperichs · CC BY-SA 3.0

Alunite supergroup, phosphate-sulfate mineral

Properties

Chemical formula

CaAl₃(SO₄)(PO₄)(OH)₆

Group

Sulfates

Crystal system

Trigonal

Hardness (Mohs)

—

Color

White

Luster

—

Streak

White

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

R-3m

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

8.BL.05

Dana classification

43.4.1.8

IMA status

Redefined mineral (Rd)

IMA symbol

Wdh

Locality

🇺🇸 White Mountain Peak

Type locality

—

Discovery year

—

Source: Wikidata