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Minerals - Torbernite | TerraCollect

Mineral - Torbernite

TorberniteCu(UO₂)₂(PO₄)₂ · 12H₂O

Chemical Properties

Mineral Class

Phosphates

Toxicity

radioactive

Formula

Cu(UO₂)₂(PO₄)₂ · 12H₂O

Unit Cell

a=7.03 c=20.81 Z=2

Physical Properties

Hardness

2 - 2.5

Streak

green

Density

Normal (2-3,5)

Optical Properties

Color

green

Birefringence

0.010

Luster

Vitreous,

Pearly

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

tetragonal

Point Group

Composition

Elements

Mass

UO₃

57.03

P₂O₅

14.50

SiO₂

0.59

CuO

7.73

H₂O

20.30

Germany (Palache et al. 1952)

Groups and Members

Autunite-Group

Karten-Ebenen

Geologische KarteSatelliten Karte

Cleavage

Perfect after {001}

Fracture

Tenacity

Brittle

ditetragonal-dipyramidal - 4/m 2/m 2/m

Space Group

I4/mmm (139)

Habit

leafy, dipyramidal, pyramidal, tabular

Formation

Secondary, through the aqueous oxidation of primary uranium minerals (particularly uraninite) in the oxidation zone of hydrothermal ore deposits in the presence of copper ions and phosphoric acid

Paragenesis

Twinning

Rarity

Rather rare

Synonyms

Torbernite