Austinite Mineral Data

Austinite Mineral Data +

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General Austinite Information

Chemical Formula:

CaZn(AsO4)(OH)

Composition:

Molecular Weight = 261.39 gm

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

Empirical Formula:

CaZn(AsO₄)(OH)

Environment:

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

IMA Status:

Valid Species (Pre-IMA) 1935

Locality:

In the USA, in the Western Utah mine, Gold Hill, Tooele Co., Utah; at the Mohawk mine, Clark Mountains, San Bernardino Co., California; from the Table Mountain mine, Galiuro Mountains, Link to MinDat.org Location Data.

Name Origin:

To honor Professor Austin Flint Rogers (1877-1957), American mineralogist, Stanford University, Palo Alto, California, USA.

Synonym:

ICSD 63285

PDF 37-445

Austinite Image

Images:

Austinite

Comments: Green, spherulitic clusters of austinite crystals.
Location: Gold Hill mine, Deep Creek Mts., Tooele County, Utah, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Austinite Crystallography

Axial Ratios:

a:b:c =0.8303:1:0.6561

Cell Dimensions:

a = 7.5092, b = 9.0438, c = 5.9343, Z = 4; V = 403.01 Den(Calc)= 4.31

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 2₁2₁2₁

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.637(1), 2.801(1), 3.171(1),

Forms:

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Crystal Structure:

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Clark L A , Pluth J J , Steele I M , Smith J V , Sutton S R , Mineralogical Magazine , 61 (1997) p.677-683, Crystal structure of austinite, CaZn(AsO4)OH, Locality: Sonora, Mexico

Physical Properties of Austinite

Cleavage:

[110] Good

Color:

Brown, Colorless, Green, Yellowish white, White.

Density:

4.13

Diaphaniety:

Transparent to Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Hardness:

4-4.5 - Between Fluorite and Apatite

Luster:

Subadamantine

Streak:

white

Optical Properties of Austinite

Gladstone-Dale:

CI meas= -0.05 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1783,KPDmeas= 0.186,KC= 0.1772

Optical Data:

Biaxial (+), a=1.759, b=1.763, g=1.783, bire=0.0240, 2V(Calc)=50, 2V(Meas)=47.

Calculated Properties of Austinite

Electron Density:

r_electron=4.09 gm/cc
note: r_Austinite=4.31 gm/cc.

Fermion Index

Fermion Index = 0.01061
Boson Index = 0.98939

Photoelectric:

PE_Austinite= 34.14 barns/electron
U=PE_Austinite x r_electron= 139.61 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Austinite is Not Radioactive

Austinite Classification

Dana Class:

41.5.1.3 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.5)where (A B)2 (XO4) Zq

(41.5.1)Dana Group

41.5.1.1 Adelite CaMg(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.2 Conichalcite CaCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.3 Austinite CaZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.4 Duftite-beta PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.5 Gabrielsonite PbFe(AsO4)(OH) P 2₁m mm2

41.5.1.6 Tangeite CaCu(VO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.7 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.8 Cobaltaustinite CaCo(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.9 Arsendescloizite PbZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.5.1.10 Gottlobite! CaMg(VO4,AsO4)(OH) P 2₁2₁2₁ 2 2 2

Strunz Class:

VII/B.26-40 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb

VII/B.26 - Adelite - Duftite group

VII/B.26-10 Adelite CaMg(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-15 Gottlobite! CaMg(VO4,AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-20 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-30 Cobaltaustinite CaCo(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-40 Austinite CaZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-50 Conichalcite CaCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-60 Tangeite CaCu(VO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-70 Gabrielsonite PbFe(AsO4)(OH) P 2₁m mm2

VII/B.26-80 Duftite-alpha PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-80* Duftite-beta PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

Other Austinite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Print or Cut-and-Paste your Austinite Specimen Label here :

Austinite

CaZn(AsO4)(OH)
Dana No: 41.5.1.3 Strunz No: VII/B.26-40
Locality:

Notes: