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Minerals - Hydropyrochlore | TerraCollect

Mineral - Hydropyrochlore

Hydropyrochlore(H₂O, □)₂Nb₂(O,OH)₆(H₂O)

Chemical Properties

Mineral Class

Oxides and Hydrxides

Toxicity

none

Formula

(H₂O, □)₂Nb₂(O,OH)₆(H₂O)

Unit Cell

a=10,60 Z=8

Physical Properties

Hardness

4 - 4.5

Streak

whitegray

Density

Optical Properties

Color

whitegraygreengreen whitegreen grey

Birefringence

Luster

Vitreous,

Greasy

Transparency

opaque

Pleochroism

Geomineralogical Properties

Crystal System

Composition

Elements

Mass

U₃O₈

0,11

Nb₂O₅

78,60

Ta₂O₅

0,06

V₂O₅

0,02

TiO₂

4,12

ZrO₂

0,65

SnO₂

0,01

Normal (2-3,5)

Cleavage

Fracture

uneven

Tenacity

isometric

Point Group

Space Group

Habit

Octahedron

Formation

Als alluviale Lagerstätte aus einem magmatischen Carbonatit-Pluton entstanden

Paragenesis

Twinning

Rarity

Rarely

Synonyms

Hydropyrochlore

ThO₂

0,12

Al₂O₃

0,18

RE₂O₃

0,44

Fe₂O₃

0,21

FeO

0,06

PbO

0,01

MgO

0,10

MnO

0,08

CaO

0,40

BaO

0,28

SrO

2,60

Na₂O

0,36

K₂O

2,72

F

0,38

H₂O

8,50

DR Kongo

Groups and Members

Pyrochlor-Supergruppe

Pyrochlor-Gruppe