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

Cyclosilicate, mineral

Properties

Chemical formula

Na₁₅Ca₆(Fe²⁺,Mn²⁺)₃Zr₃[Si₂₅O₇₃](O,OH,H₂O)₃(OH,Cl)₂

Group

Silicates

Crystal system

Trigonal

Hardness (Mohs)

—

Color

Red

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

9.CO.10

Dana classification

—

IMA status

Approved mineral and/or valid name (A)

IMA symbol

Eud

Locality

🇬🇱 Kangerluarsuk fjord, Ilímaussaq

Type locality

—

Discovery year

—

Source: Wikidata