Photo: Joan Rosell, from rosellminerals.com · CC BY-SA 4.0

Cyclosilicate mineral

Properties

Chemical formula

Na₁₂(Mn,Sr,REE)₃Ca₆Fe²⁺₃Zr₃NbSi₂₅O₇₆Cl₂·H₂O

Group

Silicates

Crystal system

Trigonal

Hardness (Mohs)

—

Color

Yellow

Luster

—

Streak

White

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

R3m

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

Gba

Locality

🇷🇺 Khibiny Mountains

Type locality

—

Discovery year

—

Source: Wikidata