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Minerals - Arhbarite | TerraCollect

Mineral - Arhbarite

ArhbariteCu₂Mg(AsO₄)(OH)₃

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Chemical Properties

Mineral Class

Arsenates

Toxicity

none

Formula

Cu₂Mg(AsO₄)(OH)₃

Unit Cell

a=5.32 b=5.98 c=5.03 α=114° β=97° γ=89° Z=1

Physical Properties

Hardness

5

Streak

blue

Density

Heavy (3,5-6)

Optical Properties

Color

blue

Birefringence

0.020

Luster

Vitreous,

Waxy

Transparency

translucent

Pleochroism

X, Y: Türkis-Blau Z: Dunkelblau

Geomineralogical Properties

Crystal System

triclinic

Point Group

Composition

Elements

Mass

As₂O₅

33.85

MgO

10.20

FeO

0.04

NiO

0.20

CoO

0.24

CuO

47.46

SiO₂

0.10

Map-Layer

Geological MapSatellite Map

Name and first discovery : Named after the type locality, the Aghbar Mine in Morocco. First described in 1981.

Synonyms :

Varieties :

Abbreviation : Arh

literature

Schmetzer, K., Tremmel, G., & Medenbach, O. (1982). Arhbarite, Cu2[OH/AsO4]•6H2O, a new mineral from Bou-Azzer, Morocco. Neues Jahrbuch für Mineralogie Monatshefte , (12), 529-533.

Cleavage

Fracture

nd

Tenacity

Brittle

triclinic-pedial - 1

Space Group

P1 (1)

Habit

spherical, kidney-shaped

Formation

Secondary, in polymetallic metal deposits, if a Mg component is present (usually dolomite)

Paragenesis

Twinning

Rarity

Very rare

Synonyms

Arhbarite

H₂O

7.58

Chile (Schmetzer et al. 1982)