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Minerals - Chalcophyllit | TerraCollect

Mineral - Chalcophyllit

ChalcophyllitCu₁₈Al₂(AsO₄)₄(SO₄)₃(OH)₂₄ · 36H₂O

Chemical Properties

Mineral Class

Arsenates

Toxicity

middle

Formula

Cu₁₈Al₂(AsO₄)₄(SO₄)₃(OH)₂₄ · 36H₂O

Unit Cell

Physical Properties

Hardness

2

Streak

greenblueblue green

Optical Properties

Color

greenblue

Birefringence

0.066

Luster

Vitreous,

Adamantine

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

trigonal

Density

Normal (2-3,5)

Cleavage

Fracture

Tenacity

Brittle

Point Group

rhombohedral - 3

Space Group

R3 (148)

Habit

tabular

Formation

In the oxidation zone of Cu-rich arsenic deposits

Paragenesis

Twinning

Rarity

Rarely

Synonyms

Chalcophyllit