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Minerals - Cyanotrichite | TerraCollect

Mineral - Cyanotrichite

CyanotrichiteCu₄Al₂(SO₄)(OH)₁₂ · 2 H₂O

Chemical Properties

Mineral Class

Sulphates

Toxicity

none

Formula

Cu₄Al₂(SO₄)(OH)₁₂ · 2 H₂O

Unit Cell

a=10.16 b=12.61 c=2.90 Z=1

Physical Properties

Hardness

2

Streak

blue

Density

Normal (2-3,5)

Optical Properties

Color

blue

Birefringence

0.067

Luster

Silky

Transparency

translucent,

transparent

Pleochroism

X = Farblos Y = Farblos-Blau Z = Blau

Geomineralogical Properties

Crystal System

monoclinic

Point Group

Composition

Elements

Mass

SO₃

12.19

Al₂O₃

15.59

Fe₂O₃

0.43

CuO

47.50

CaO

0.11

H₂O

23.20

USA (Palache et al. 1952)

Groups and Members

Cyanotrichite-Group

Karten-Ebenen

Geologische KarteSatelliten Karte

Cleavage

Fracture

Tenacity

monoclinic-prismatic - 2/m

Space Group

C2/m (12)

Habit

fibrous, acicular, radial

Formation

Oxidationszone von Kupfer-Lagerstätten

Paragenesis

Twinning

Rarity

Rather rare

Synonyms

Cyanotrichite