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Cobaltaustinite

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Formula:
CaCo(AsO4)(OH)
System:
Orthorhombic
Colour:
Dull green
Hardness:
Name:
Named by Ernest H. Nickel and William D. Birch in 1988 after Austin Flint Rogers (1877-1957), American mineralogist at Stanford University, and in allusion to the dominance of Co in the composition.

Classification of Cobaltaustinite

Approved 1987
8.BH.35

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1
41.5.1.8

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
20.10.2

20 : Arsenates (also arsenates with phosphate, but without other anions)
10 : Arsenates of Co and Ni
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First Recorded Occurrence of Cobaltaustinite

Place of Conservation of First Recorded Material:
Western Australian Museum, Perth, Australia;
Museum Victoria, Melbourne, Australia
Geological Setting of First Recorded Material:
Oxidised zone in the Dome Rock copper deposit, as alteration product of arsenides.
Associated Minerals at First Recorded Locality:

Physical Properties of Cobaltaustinite

Sub-Vitreous, Earthy
Diaphaneity (Transparency):
Transparent
Colour:
Dull green
Streak:
Light green
Hardness (Mohs):
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
4.24 g/cm3 (Calculated)

Crystallography of Cobaltaustinite

Crystal System:
Orthorhombic
Class (H-M):
2 2 2 - Disphenoidal
Space Group:
P21 21 21
Space Group Setting:
P21 21 21
Cell Parameters:
a = 7.498Å, b = 9.01Å, c = 5.92Å
Ratio:
a:b:c = 0.832 : 1 : 0.657
Unit Cell Volume:
V 399.94 ų (Calculated from Unit Cell)
Z:
4
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.13 (70)
3.159 (100)
2.801 (50 broad)
2.633 (80)
2.600 (80)
2.532 (40)
1.609 (100)
Comments:
Dome Rock mine, South Australia, Australia

Optical Data of Cobaltaustinite

Type:
Biaxial (+)
RI values:
nα = 1.777 nγ = 1.802
Birefringence:
0.024
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v slight
Pleochroism:
Non-pleochroic

Chemical Properties of Cobaltaustinite

Formula:
CaCo(AsO4)(OH)
Essential elements:
All elements listed in formula:

Relationship of Cobaltaustinite to other Species

Series:
Forms a series with Conichalcite (see here)
Other Members of Group:
AdeliteCaMg(AsO4)(OH)
ArsendescloizitePbZn(AsO4)(OH)
AustiniteCaZn(AsO4)(OH)
ČechitePb(Fe2+,Mn2+)(VO4)(OH)
ConichalciteCaCu(AsO4)(OH)
DescloizitePb(Zn,Cu)(VO4)(OH)
DuftitePbCu(AsO4)(OH)
GabrielsonitePbFe(AsO4)(OH)
GottlobiteCaMg(VO4,AsO4)(OH)
HermannroseiteCaCu(PO4)(OH)
MottramitePbCu(VO4)(OH)
NickelaustiniteCa(Ni,Zn)(AsO4)(OH)
PyrobelonitePbMn2+(VO4)(OH)
TangeiteCaCu(VO4)(OH)
8.BH.05ThadeuiteCa(Mg,Fe2+)3(PO4)2(OH,F)2
8.BH.10DurangiteNaAl(AsO4)F
8.BH.10IsokiteCaMg(PO4)F
8.BH.10LacroixiteNaAl(PO4)F
8.BH.10MaxwelliteNaFe3+(AsO4)F
8.BH.10PanasqueiraiteCaMg(PO4)(OH,F)
8.BH.10TilasiteCaMg(AsO4)F
8.BH.15DrugmanitePb(Fe3+,Al)2(PO4)2(OH)2
8.BH.20Bjarebyite(Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3
8.BH.20CirroliteCa3Al2(PO4)3(OH)3 (?)
8.BH.20KulaniteBa(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3
8.BH.20PenikisiteBa(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3
8.BH.20PerloffiteBa(Mn2+,Fe2+)2Fe23+(PO4)3(OH)3
8.BH.20JohntomaiteBaFe22+Fe23+(PO4)3(OH)3
8.BH.25Bertossaite(Li,Na)2(Ca,Fe2+,Mn2+)Al4(PO4)4(OH,F)4
8.BH.25Palermoite(Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4
8.BH.30CarminitePbFe23+(AsO4)2(OH)2
8.BH.30SewarditeCaFe23+(AsO4)2(OH)2
8.BH.35AdeliteCaMg(AsO4)(OH)
8.BH.35ArsendescloizitePbZn(AsO4)(OH)
8.BH.35AustiniteCaZn(AsO4)(OH)
8.BH.35ConichalciteCaCu(AsO4)(OH)
8.BH.35DuftitePbCu(AsO4)(OH)
8.BH.35GabrielsonitePbFe(AsO4)(OH)
8.BH.35NickelaustiniteCa(Ni,Zn)(AsO4)(OH)
8.BH.35TangeiteCaCu(VO4)(OH)
8.BH.35GottlobiteCaMg(VO4,AsO4)(OH)
8.BH.35HermannroseiteCaCu(PO4)(OH)
8.BH.40ČechitePb(Fe2+,Mn2+)(VO4)(OH)
8.BH.40DescloizitePb(Zn,Cu)(VO4)(OH)
8.BH.40MottramitePbCu(VO4)(OH)
8.BH.40PyrobelonitePbMn2+(VO4)(OH)
8.BH.45BayldonitePbCu3(AsO4)2(OH)2
8.BH.45VésigniéiteBaCu3(VO4)2(OH)2
8.BH.50PaganoiteNiBi(AsO4)O
8.BH.55JagoweriteBaAl2(PO4)2(OH)2
8.BH.60Attakolite(Ca,Sr)Mn(Al,Fe)4(HPO4,PO4)3(SiO4,PO4)(OH)4
8.BH.65LeningraditePbCu3(VO4)2Cl
20.10.1ErythriteCo3(AsO4)2 · 8H2O
20.10.3RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
20.10.4β-RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
20.10.5WendwilsoniteCa2Mg(AsO4)2 · 2H2O
20.10.6Cobaltkoritnigite(Co,Zn)(HAsO4) · H2O
20.10.7AerugiteNi8.5(AsO4)2As5+O8
20.10.8XanthiositeNi3(AsO4)2
20.10.9AnnabergiteNi3(AsO4)2 · 8H2O
20.10.10Smolyaninovite(Co,Ni,Mg,Ca)3(Fe3+,Al)2(AsO4)4 · 11H2O
20.10.11NickelaustiniteCa(Ni,Zn)(AsO4)(OH)

Other Names for Cobaltaustinite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Cobaltaustinite

Reference List:
Nickel, E.H. & W.D. Birch (1988) Cobaltaustinite - a new arsenate mineral from Dome Rock, South Australia: Australian Mineralogist:3:53-57. American Mineralogist (1989) 74: 501 [abstract].

Effenberger, H., Krause, W., and Bernhardt, H.-J. (2002) Structural investigation of adelite and cobaltaustinite, two members of the Adelite-descloizite Group. EMPG IX, Ninth International Symposium on Experimental Mineralogy, Petrology and Geochemistry, Zürich, Switzerland, 24.-27.3, Book of Abstracts (2002), 30.

H. Yang, G. Costin, J. Keogh, R. Lu and R. T. Downs (2007) Cobaltaustinite, CaCo(AsO4)(OH). Acta Crystallographica E63, i53-i55.

Internet Links for Cobaltaustinite

Specimens:
The following Cobaltaustinite specimens are currently listed for sale on minfind.com.

Localities for Cobaltaustinite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Australia
 
  • South Australia
    • Olary Province
      • Boolcoomatta Reserve (Boolcoomata Station; Boolcoomatta)
Nickel, E.H. & W.D. Birch:1988: Cobaltaustinite - a new arsenate mineral from Dome Rock, South Australia": Australian Mineralogist:3:53-57
      • Kalabity homestead area
Jack Leach collection & Museum of Victoria
Germany
 
  • Saxony
    • Erzgebirge
      • Schneeberg District
        • Neustädtel
Lapis 30(7/8):41-70 (2005)
Mineralogical Record: 32: 418.
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
[MinMax website]
        • Agios Konstantinos [St Constantine] (Kamariza)
Katerinopoulos, A. (1996): Bisher nicht bekannte Minerale aus den Lavrion-Bergwerken. Lapis, 21 (11), 39; 62.
Morocco
 
  • Souss-Massa-Draâ Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azer District (Bou Azzer District)
          • Aghbar
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Agoudal
Tomasz Praszkier (2010) Lapis, 35, #11, 29-31.
          • Aït Ahmane
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Bou Azer
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Mineral and/or Locality  
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