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

Sulfate mineral

Properties

Chemical formula

Na₂Ca(SO₄)₂

Group

Sulfates

Crystal system

Monoclinic

Hardness (Mohs)

—

Color

Gray

Luster

—

Streak

White

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

—

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

7.AD.25

Dana classification

28.4.2.1

IMA status

Grandfathered mineral (G)

IMA symbol

Glb

Locality

🇪🇸 Villarrubia de Santiago

Type locality

—

Discovery year

—

Source: Wikidata