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Minerals - Brochantite | TerraCollect

Mineral - Brochantite

BrochantiteCu₄[(OH)₆|(SO₄)]

Chemical Properties

Mineral Class

Sulphates

Toxicity

none

Formula

Cu₄[(OH)₆|(SO₄)]

Unit Cell

a=13.08 b=9.85 c=6.02 β=103° Z=4

Physical Properties

Hardness

3.5 - 4

Streak

green

Density

Very Heavy (>6)

Optical Properties

Color

green

Birefringence

0.072

Luster

Vitreous,

Pearly

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

monoclinic

Point Group

Composition

Elements

Mass

SO₃

17.54

CuO

70.29

H₂O

11.96

Chile (Palache et al. 1952)

Karten-Ebenen

Geologische KarteSatelliten Karte

Cleavage

Perfect after {100}

Fracture

uneven

Tenacity

Brittle

monoclinic-prismatic - 2/m

Space Group

P21/c (14)

Habit

crusty, acicular, prismatic

Formation

Oxidation zone of copper deposits

Paragenesis

Twinning

Rarity

Rather rare

Synonyms

Brochantite