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Cobaltaustinite

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Cobaltaustinite

Aghbar open pit, Aghbar, Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Cobaltaustinite

Aghbar Mine, Aghbar, Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Cobaltaustinite, etc.

Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Cobaltaustinite

Aghbar open pit, Aghbar, Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Cobaltaustinite

Aghbar Mine, Aghbar, Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Cobaltaustinite, etc.

Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Cobaltaustinite

Aghbar open pit, Aghbar, Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Cobaltaustinite

Aghbar Mine, Aghbar, Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Formula:
CaCoAsO4(OH)
System:
Orthorhombic
Colour:
Dull green
Lustre:
Sub-Vitreous, Earthy
Hardness:
4½
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.
Adelite-Descloizite Group. Cobaltaustinite-Conichalcite Series.
The Co-analogue of Austinite and Nickelaustinite.


Classification of Cobaltaustinite

IMA status:
Approved
Approval Year:
1987
Strunz 8th ed.:
7/B.26-30
Nickel-Strunz 10th (pending) ed.:
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
Dana 8th ed.:
41.5.1.8

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
Hey's CIM Ref.:
20.10.2

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

Physical Properties of Cobaltaustinite

Lustre:
Sub-Vitreous, Earthy
Diaphaneity (Transparency):
Transparent
Colour:
Dull green
Streak:
Light green
Hardness (Mohs):
4½
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
4.24 g/cm3 (Calculated)

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

IMA Formula:
CaCoAsO4(OH)
Elements listed in formula:
As, Ca, Co, H, O - search for minerals with similar chemistry

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 = 7.498 Å, b = 9.01 Å, c = 5.92 Å
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

Type Occurrence of Cobaltaustinite

Type Locality:
Dome Rock Copper Mine, Boolcoomatta Reserve (Boolcoomata Station; Boolcoomatta), Olary Province, South Australia, Australia
Place of Conservation of Type Material:
Western Australian Museum, Perth, Australia;
Museum Victoria, Melbourne, Australia
Geological Setting of Type Material:
Oxidised zone in the Dome Rock copper deposit, as alteration product of arsenides.
Associated Minerals at Type Locality:
ScoroditeRoselite-βErythriteConichalciteChenevixite
Arthurite

Relationship of Cobaltaustinite to other Species

Series:
Forms a series with Conichalcite (see here)
Member of:
Adelite-Descloizite Group
Other Members of Group:
AdeliteCaMg(AsO4)(OH)
ArsendescloizitePbZn(AsO4)(OH)
AustiniteCaZn(AsO4)(OH)
ČechitePbFe2+(VO4)(OH)
ConichalciteCaCu(AsO4)(OH)
DescloizitePbZn(VO4)(OH)
DuftitePbCu(AsO4)(OH)
GabrielsonitePbFe(AsO4)(OH)
GottlobiteCaMg(VO4,AsO4)(OH)
HermannroseiteCaCu(PO4)(OH)
MottramitePbCu(VO4)(OH)
NickelaustiniteCaNi(AsO4)(OH)
PyrobelonitePbMn2+(VO4)(OH)
TangeiteCaCu(VO4)(OH)
VuagnatiteCaAl(SiO4)(OH)
Related Minerals - Nickel-Strunz Grouping):
8.BH.05ThadeuiteCaMg3(PO4)2(OH,F)2
8.BH.10DurangiteNaAlAsO4F
8.BH.10IsokiteCaMgPO4F
8.BH.10LacroixiteNaAl(PO4)F
8.BH.10MaxwelliteNaFe3+AsO4F
8.BH.10PanasqueiraiteCaMgPO4(OH)
8.BH.10TilasiteCaMgAsO4F
8.BH.15DrugmanitePb2Fe3+(PO4)(PO3OH)(OH)2
8.BH.20BjarebyiteBaMn22+Al2(PO4)3(OH)3
8.BH.20CirroliteCa3Al2(PO4)3(OH)3
8.BH.20KulaniteBaFe22+Al2(PO4)3(OH)3
8.BH.20PenikisiteBaMg2Al2(PO4)3(OH)3
8.BH.20PerloffiteBaMn22+Fe23+(PO4)3(OH)3
8.BH.20JohntomaiteBaFe22+Fe23+(PO4)3(OH)3
8.BH.25BertossaiteLi2CaAl4(PO4)4(OH)4
8.BH.25PalermoiteLi2SrAl4(PO4)4(OH)4
8.BH.30CarminitePbFe23+(AsO4)2(OH)2
8.BH.30SewarditeCaFe23+(AsO4)2(OH)2
8.BH.35AdeliteCaMgAsO4(OH)
8.BH.35ArsendescloizitePbZnAsO4(OH)
8.BH.35AustiniteCaZnAsO4(OH)
8.BH.35ConichalciteCaCuAsO4(OH)
8.BH.35DuftitePbCuAsO4(OH)
8.BH.35GabrielsonitePbFeAsO4(OH)
8.BH.35NickelaustiniteCaNiAsO4(OH)
8.BH.35TangeiteCaCuVO4(OH)
8.BH.35GottlobiteCaMg(VO4)(OH)
8.BH.35HermannroseiteCaCu(PO4)(OH)
8.BH.40ČechitePbFe2+VO4(OH)
8.BH.40DescloizitePbZnVO4(OH)
8.BH.40MottramitePbCuVO4(OH)
8.BH.40PyrobelonitePbMn2+VO4(OH)
8.BH.45BayldoniteCu3PbO(AsO3OH)2(OH)2
8.BH.45VésigniéiteCu3Ba(VO4)2(OH)2
8.BH.50PaganoiteNiBi3+OAsO4
8.BH.55JagoweriteBaAl2(PO4)2(OH)2
8.BH.60AttakoliteCaMn2+Al4(HSiO4)(PO4)3(OH)4
8.BH.65LeningraditePbCu3(VO4)2Cl2
Related Minerals - Hey's Index Grouping:
20.10.1ErythriteCo3(AsO4)2 · 8H2O
20.10.3RoseliteCa2Co(AsO4)2 · 2H2O
20.10.4β-RoseliteCa2Co(AsO4)2 · 2H2O
20.10.5WendwilsoniteCa2Mg(AsO4)2 · 2H2O
20.10.6CobaltkoritnigiteCo(AsO3OH) · H2O
20.10.7AerugiteNi8.5(AsO4)2As5+O8
20.10.8XanthiositeNi3(AsO4)2
20.10.9AnnabergiteNi3(AsO4)2 · 8H2O
20.10.10SmolyaninoviteCo3Fe23+(AsO4)4 · 11H2O
20.10.11NickelaustiniteCaNiAsO4(OH)

Other Names for Cobaltaustinite

Synonyms:

IMA1987-042

Name in Other Languages:
Varieties:

Cuprian Cobaltaustinite

Other Information

Fluorescence in UV light:
Not fluorescent
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

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https://www.mindat.org/min-1099.html
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    • Localities for Cobaltaustinite

    This 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 (TL)
     
    • 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; Vera Munro-Smith (2006) Cobalt Mineralisation in Selected Australian Deposits. PhD thesis, University of Western Sydney.
        • 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
     
    • Drâa-Tafilalet 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
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