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Minerals - Chalcomenite | TerraCollect

Mineral - Chalcomenite

ChalcomeniteCuSeO₃ · 2H₂O

Chemical Properties

Mineral Class

Oxides and Hydrxides

Toxicity

low

Formula

CuSeO₃ · 2H₂O

Unit Cell

a=6.67 b=9.16 c=7.40 Z=4

Physical Properties

Hardness

2 - 2.5

Streak

blueturquoise

Density

Optical Properties

Color

blue

Birefringence

0.020

Luster

Vitreous,

Resinous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

orthorhombic

Point Group

Composition

Elements

Mass

SeO₂

48.12

CuO

35.40

H₂O

15.30

Argentinia

Normal (2-3,5)

Cleavage

Fracture

conchoidal

Tenacity

Brittle

orthorhombic-disphenoidal - 222

Space Group

P212121 (19)

Habit

tufty, crusty, spherical, acicular, kidney-shaped, prismatic, prismatic, radial, tabular

Formation

Secondary, in the oxidation zone of supergene Cu-Se deposits

Paragenesis

Twinning

Rarity

Very rare

Synonyms

Chalcomenite