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Austinite
Current inventory:  0 gems
 

Austinite

  
Austinite was named t
o honor Professor Austin Flint Rogers (1877-1957), American mineralogist, Stanford University, Palo Alto, California, USA.

Discovered in 1935;   IMA status: Valid (pre-IMA; Grandfathered)

 

Chemistry

 

 

Chemical Formula:

CaZn(AsO4)(OH)

 

Calcium Zinc Arsenate Hydroxide

Molecular Weight:

261.39 gm

Composition:

Calcium

15.33 %

Ca

21.45 %

CaO

 

Zinc

25.02 %

Zn

31.14 %

ZnO

 

Arsenic

28.66 %

As

43.96 %

As2O5

 

Hydrogen

0.39 %

H

3.45 %

H2O

 

Oxygen

30.60 %

O

 

 

 

 

100.00 %

 

100.00 %

= TOTAL OXIDE

 

 

Classification

   

   

Mineral Classification:

Phosphates

Strunz 8th Ed. ID:

7/B.26-40

Nickel-Strunz 10th Ed. ID:

8.BH.35

 

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H
2O
H : With medium-sized and large cations, (OH,etc.):RO
4 = 1:1

Related to:

Adelite-Descloizite Group. Austinite-Conichalcite Series. The zinc analogue of Cobaltausinite and Nickelaustinite.

Members of Group:

Adelite-Descloizite Group: Adelite, Arsendescloizite, Austinite, Cechite, Cobaltaustinite, Conichalcite, Descloizite, Duftite, Gabrielsonite, Gottlobite, Hermannroseite, Mottramite, Nickelaustinite, Pyrobelonite, Tangeite

Varieties:

Cobaltoan Austinite, Cuprian Austinite  

Synonyms:

Brickerite

 

 

Crystal Data

   

   

Crystallography:

Orthorhombic - Disphenoidal

Crystal Habit:

As enantiomorphous bladed crystals exhibiting {011}, {111}, {111}, {010} and several other forms, sometimes forming scepters. Also as radially fibrous crusts and nodules.

Twinning:

Left- and right-handed individuals joined on (100), with (010) and (001) coincident.

 

 

Physical Properties

   

 

Cleavage:

Good on {011}

Fracture:

Irregular/Uneven, Conchoidal

Tenacity:

Brittle

Moh's Hardness:

4.0 - 4.5

Density:

4.13 (g/cm3)

Luminescence:

None

Radioactivity:

Not Radioactive

 

 

Optical Properties

   

   

Color:

Colorless to pale Yellowish White or bright Green; Colorless in transmitted light.

Transparency:

Transparent to Translucent

Luster:

Sub-Adamantine, Silky in aggregates

Refractive Index:

1.759 - 1.783  Biaxial ( + )

Birefringence:

0.0240

Dispersion:

Weak; r > v

Pleochroism:

None

 

 

Occurances

   

   

Geological Setting:

A rare secondary mineral in the oxidized zone of some arsenic-rich base-metal deposits.

Common Associations:

Adamite, Limonite, Quartz, Talmessite (Gold Hill, Utah, USA)

Common Impurities:

None

Type Locality:

Gold Hill Mine (Western Utah Mine), Gold Hill, Gold Hill District (Clifton District), Deep Creek Mts, Tooele County, Utah, USA

Year Discovered:

1935

View mineral photos:

Austinite Mineral Photos and Locations

 

 

More Information

   

   

 

Mindat.org
Webmineral.com

 

 


Austinite is a fairly rare mineral and an extremely rare gem. Mineral specimens are very collectable as they occur as radial clusters of colorless to intense emerald green crystals. Austinite forms in the oxidation zone of zinc ore deposits often associated with
Adamite.

Austinite is found in just a handful of localities. In the USA, at the Type Locality in the Western Utah mine, Gold Hill, Tooele County, Utah; at the Mohawk mine, Clark Mountains, San Bernardino County, California; from the Table Mountain mine, Galiuro Mountains, Pinal County, Arizona; at Sterling Hill, Ogdensburg, Sussex County, New Jersey; in the Tuckerís tunnel uranium deposit, near Durango, Hinsdale County, Colorado. From the Ojuela mine, Mapimi, Durango, Mexico. At the Lili mine, near Lomitos, Bolivia. From the Kamariza mine, Laurium, Greece. At Tsumeb and Guchab, Otavi district, Namibia. In the Puttapa zinc mine, near Beltana, South Australia.
 

  
Austinite
gems for sale:

We have not photographed our Austinite gems yet. Please check back soon.
 

 


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