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Minerals - Chevkinite-(Ce) | TerraCollect

Mineral - Chevkinite-(Ce)

Chevkinite-(Ce)(Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂(Si₂O₇)₂O₈

Chemical Properties

Mineral Class

Silicates

Toxicity

radioactive

Formula

(Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂(Si₂O₇)₂O₈

Unit Cell

Physical Properties

Hardness

5 - 5.5

Streak

brown

Density

Heavy (3,5-6)

Optical Properties

Color

black

Birefringence

0.083

Luster

Metallic

Transparency

opaque

Pleochroism

Geomineralogical Properties

Crystal System

monoclinic

Point Group

Groups and Members

Chevkinite-Group

Chevkinite-Subgroup

Cleavage

Fracture

conchoidal

Tenacity

Brittle

monoclinic-prismatic - 2/m

Space Group

C2/m (12)

Habit

tabular

Formation

In igneous rocks and their pegmatites

Paragenesis

Twinning

Rarity

Rarely

Synonyms

Chevkinite-(Ce), Chevkinite