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Minerals - Gadolinite-(Y) | TerraCollect

Mineral - Gadolinite-(Y)

Gadolinite-(Y)Y₂Fe²⁺Be₂Si₂O₁₀

Chemical Properties

Mineral Class

Silicates

Toxicity

radioactive

Formula

Y₂Fe²⁺Be₂Si₂O₁₀

Unit Cell

a=10,00 b=7,57 c=4,77 β=91° Z=2

Physical Properties

Hardness

6.5 - 7

Streak

white

Density

Optical Properties

Color

blackbrown

Birefringence

0,050

Luster

Vitreous,

Greasy

Transparency

translucent,

opaque

Pleochroism

Geomineralogical Properties

Crystal System

monoclinic

Composition

Elements

Mass

SiO₂

22,13

ThO₂

0,89

Y₂O₃

22,24

(Dy,La)₂O₃

21,23

Ce₂O₃

11,10

Fe₂O₃

3,47

FeO

10,43

Cleavage

Fracture

conchoidal,

splintery

Tenacity

Brittle

Point Group

Space Group

Habit

blocky, massive, prismatic

Formation

In granitischen Pegmatiten

Paragenesis

Twinning

Rarity

Rarely

Synonyms

Gadolinite-(Y)

BeO

7,19

CaO

0,48

Na₂O

0,46

H₂O

0,86

Colorado

Groups and Members

Gadolinit-Supergruppe

Gadolinit-Gruppe

Gadolinit-Subgruppe