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Mineral - Austinite

AustiniteCaZn(AsO₄)(OH)
Chemical Properties
Mineral Class
Arsenates
Toxicity
middle
Formula
CaZn(AsO₄)(OH)
Unit Cell
a=7.51 b=9.04 c=5.93 Z=4
Physical Properties
Hardness
4 - 4.5
Streak
white
Density
Heavy (3,5-6)
Cleavage
Good after {011}
Fracture
Tenacity
Brittle
Optical Properties
Color
whitebrownyellowgreen
Birefringence
0,024
Luster
Silky,
Adamantine
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
orthorhombic-disphenoidal - 222
Space Group
P2 1 2 1 2 1 (19)
Habit
leafy, crusty, spherical, tabular
Formation
In the oxidation zone of arsenic deposits
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Austinite
Composition
Elements
Mass
P₂O₅
0.90
As₂O₅
42.85
FeO
0.49
CuO
0.88
ZnO
30.10
CaO
21.33
H₂O
3.45
Greece (Williams & de Azevedo 1967)
Groups and Members
Adelite-Descloizite-Group

Name and first discovery: Named after the American mineralogist and professor at Stanford University Austin Flint Rogers (1877-1957). First described in 1935.

Chemism: 

Synonyms: 

Varieties: Cobaltaustinite, Cuproaustinite

Abbreviation: Aus

 

Famous locations

(TL) Type locality                           (analysis) Chemical element distribution, see above

 

USA

(TL) Gold Hill Mine, Gold Hill, Tooele County, Utah, USA

 

Australia

Beltana Mine, Puttapa, South Australia, Australia

 

Greece

Kamariza Mines, Lavrion Mining District, Attica, Greece

 

Mexico

Ojuela Mine, Mapimí, Durango, Mexico

 

Namibia

Tsumeb Mine, Oshikoto, Namibia

 

Spain

Cogolla Alta Mine, Belalcázar, Andalusia, Spain

 

 

Literature

Williams, S.A. and J. de Azevedo (1967) Austinite from Gold Hill, Utah. Amer. Mineral., 52, 1224-1226