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Minerals - Clinoclase | TerraCollect

Mineral - Clinoclase

ClinoclaseCu₃[(OH)₃|AsO₄]

Chemical Properties

Mineral Class

Arsenates

Toxicity

middle

Formula

Cu₃[(OH)₃|AsO₄]

Unit Cell

a=12.38 b=6.46 c=7.26 β=99° Z=4

Physical Properties

Hardness

2.5 - 3

Streak

greenblueblue green

Optical Properties

Color

blackblue

Birefringence

0.180

Luster

Vitreous,

Pearly

Transparency

translucent,

transparent

Pleochroism

Blau-Grün

Geomineralogical Properties

Crystal System

monoclinic

Composition

Elements

Mass

P₂O₅

1.50

As₂O₅

27.08

Fe₂O₃

0.49

CuO

62.80

H₂O

7.57

England (Palache et al. 1952)

Karten-Ebenen

Geologische KarteSatelliten Karte

Density

Heavy (3,5-6)

Cleavage

Perfect after {001}

Fracture

uneven

Tenacity

Brittle

Point Group

monoclinic-prismatic - 2/m

Space Group

P21/c (14)

Habit

acicular, kidney-shaped, prismatic, rosette, tabular

Formation

In the oxidation zone of arsenic-rich copper deposits

Paragenesis

Twinning

Rarity

Rarely

Synonyms

Clinoclase