Photo: Modris Baum · Public domain

Phyllosilicate mineral

Properties

Chemical formula

(Na,☐,Ca)₁₂Ca₄(Si,S,B)₁₄B₂O₃₈(OH,Cl)₂F₂·4H₂O

Group

Silicates

Crystal system

Triclinic

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

9.EE.80

Dana classification

—

IMA status

Approved mineral and/or valid name (A)

IMA symbol

Mrt

Locality

🇨🇦 Poudrette quarry

Type locality

—

Discovery year

—

Source: Wikidata