Photo: John Sobolewski (JSS) · CC BY 3.0

Transitional structure between phyllosilicate and other silicate unit, mineral

Properties

Chemical formula

Na₂AlSi₃O₈(OH)

Group

Silicates

Crystal system

Triclinic

Hardness (Mohs)

—

Color

Purple

Luster

—

Streak

White

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

triclinic-pedial

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

9.EH.20

Dana classification

76.3.3.1

IMA status

Grandfathered mineral (G)

IMA symbol

Usg

Locality

🇬🇱 Kangerluarsuk fjord, Ilímaussaq

Type locality

—

Discovery year

—

Source: Wikidata