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Minerals - Cornetite | TerraCollect

Mineral - Cornetite

CornetiteCu₃(PO₄)(OH)₃

Chemical Properties

Mineral Class

Phosphates

Toxicity

none

Formula

Cu₃(PO₄)(OH)₃

Unit Cell

a=10.85 b=14.05 c=7.09 Z=8

Physical Properties

Hardness

4.5

Streak

blue

Density

Heavy (3,5-6)

Optical Properties

Color

blue

Birefringence

0.055

Luster

Vitreous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

orthorhombic

Point Group

Composition

Elements

Mass

P₂O₅

19.81

CuO

70.78

H₂O

9.41

Zambia (Palache et al. 1952)

Karten-Ebenen

Geologische KarteSatelliten Karte

Cleavage

Fracture

Tenacity

Brittle

orthorhombic-dipyramidal - 2/m 2/m 2/m

Space Group

Pbca (61)

Habit

dipyramidal, crusty, spherical, kidney-shaped, radial, grape-shaped

Formation

Oxidation zone of copper deposits

Paragenesis

Twinning

Rarity

Rather rare

Synonyms

Cornetite