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Cobaltaustinite

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Formula:
CaCo(AsO
 
4
)(OH)
System:OrthorhombicColour:Dull green
Hardness:
Member of:Adelite-Descloizite Group
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

IMA status:Approved 1987
Strunz 8th edition ID:7/B.26-30
Nickel-Strunz 10th (pending) edition ID: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 edition ID: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
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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

Physical Properties of Cobaltaustinite

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

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:
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
Maximum Birefringence:δ = 0.025

Chart 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(AsO
 
4
)(OH)
Simplified for copy/paste:CaCo(AsO4)(OH)
Essential elements:As, Ca, Co, H, O
All elements listed in formula:As, Ca, Co, H, O

Relationship of Cobaltaustinite to other Species

Series:Forms a series with Conichalcite (see here)
Member of:Adelite-Descloizite Group
Other Members of Group:

- +
Adelite
CaMg(AsO
 
4
)(OH)
Arsendescloizite
PbZn(AsO
 
4
)(OH)
Austinite
CaZn(AsO
 
4
)(OH)
Čechite
Pb(Fe
2+
 
,Mn
2+
 
)(VO
 
4
)(OH)
Conichalcite
CaCu(AsO
 
4
)(OH)
Descloizite
Pb(Zn,Cu)(VO
 
4
)(OH)
Duftite
PbCu(AsO
 
4
)(OH)
Gabrielsonite
PbFe(AsO
 
4
)(OH)
Gottlobite
CaMg(VO
 
4
,AsO
 
4
)(OH)
Hermannroseite
CaCu(PO
 
4
)(OH)
Mottramite
PbCu(VO
 
4
)(OH)
Nickelaustinite
Ca(Ni,Zn)(AsO
 
4
)(OH)
Pyrobelonite
PbMn
2+
 
(VO
 
4
)(OH)
Tangeite
CaCu(VO
 
4
)(OH)
Related Minerals - Nickel-Strunz Grouping):

- +
8.BH.05Thadeuite
Ca(Mg,Fe
2+
 
)
 
3
(PO
 
4
)
 
2
(OH,F)
 
2
8.BH.10Durangite
NaAl(AsO
 
4
)F
8.BH.10Isokite
CaMg(PO
 
4
)F
8.BH.10Lacroixite
NaAl(PO
 
4
)F
8.BH.10Maxwellite
NaFe
3+
 
(AsO
 
4
)F
8.BH.10Panasqueiraite
CaMg(PO
 
4
)(OH,F)
8.BH.10Tilasite
CaMg(AsO
 
4
)F
8.BH.15Drugmanite
Pb(Fe
3+
 
,Al)
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BH.20Bjarebyite
(Ba,Sr)(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Cirrolite
Ca
 
3
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
(?)
8.BH.20Kulanite
Ba(Fe
2+
 
,Mn
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Penikisite
Ba(Mg,Fe
2+
 
,Ca)
 
2
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Perloffite
Ba(Mn
2+
 
,Fe
2+
 
)
 
2
Fe
3+
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Johntomaite
BaFe
2+
2
Fe
3+
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.25Bertossaite
(Li,Na)
 
2
(Ca,Fe
2+
 
,Mn
2+
 
)Al
 
4
(PO
 
4
)
 
4
(OH,F)
 
4
8.BH.25Palermoite
(Li,Na)
 
2
(Sr,Ca)Al
 
4
(PO
 
4
)
 
4
(OH)
 
4
8.BH.30Carminite
PbFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.30Sewardite
CaFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.35Adelite
CaMg(AsO
 
4
)(OH)
8.BH.35Arsendescloizite
PbZn(AsO
 
4
)(OH)
8.BH.35Austinite
CaZn(AsO
 
4
)(OH)
8.BH.35Conichalcite
CaCu(AsO
 
4
)(OH)
8.BH.35Duftite
PbCu(AsO
 
4
)(OH)
8.BH.35Gabrielsonite
PbFe(AsO
 
4
)(OH)
8.BH.35Nickelaustinite
Ca(Ni,Zn)(AsO
 
4
)(OH)
8.BH.35Tangeite
CaCu(VO
 
4
)(OH)
8.BH.35Gottlobite
CaMg(VO
 
4
,AsO
 
4
)(OH)
8.BH.35Hermannroseite
CaCu(PO
 
4
)(OH)
8.BH.40Čechite
Pb(Fe
2+
 
,Mn
2+
 
)(VO
 
4
)(OH)
8.BH.40Descloizite
Pb(Zn,Cu)(VO
 
4
)(OH)
8.BH.40Mottramite
PbCu(VO
 
4
)(OH)
8.BH.40Pyrobelonite
PbMn
2+
 
(VO
 
4
)(OH)
8.BH.45Bayldonite
PbCu
 
3
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.45Vésigniéite
BaCu
 
3
(VO
 
4
)
 
2
(OH)
 
2
8.BH.50Paganoite
NiBi(AsO
 
4
)O
8.BH.55Jagowerite
BaAl
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BH.60Attakolite
(Ca,Sr)Mn(Al,Fe)
 
4
(HPO
 
4
,PO
 
4
)
 
3
(SiO
 
4
,PO
 
4
)(OH)
 
4
8.BH.65Leningradite
PbCu
 
3
(VO
 
4
)
 
2
Cl
Related Minerals - Hey's Index Grouping:

- +
20.10.1Erythrite
Co
 
3
(AsO
 
4
)
 
2
· 8H
 
2
O
20.10.3Roselite
Ca
 
2
(Co
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
20.10.4β-Roselite
Ca
 
2
(Co
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
20.10.5Wendwilsonite
Ca
 
2
Mg(AsO
 
4
)
 
2
· 2H
 
2
O
20.10.6Cobaltkoritnigite
(Co,Zn)(HAsO
 
4
) · H
 
2
O
20.10.7Aerugite
Ni
 
8.5
(AsO
 
4
)
 
2
As
5+
 
O
 
8
20.10.8Xanthiosite
Ni
 
3
(AsO
 
4
)
 
2
20.10.9Annabergite
Ni
 
3
(AsO
 
4
)
 
2
· 8H
 
2
O
20.10.10Smolyaninovite
(Co,Ni,Mg,Ca)
 
3
(Fe
3+
 
,Al)
 
2
(AsO
 
4
)
 
4
· 11H
 
2
O
20.10.11Nickelaustinite
Ca(Ni,Zn)(AsO
 
4
)(OH)

Other Names for Cobaltaustinite

Synonyms:
IMA1987-042
Other Languages:
German:Cobaltaustinit
Kobaltaustinit
Spanish:Cobaltaustinita
Varieties:
Cuprian Cobaltaustinite

Other Information

Fluorescence in UV light:Not fluorescent
Health Warning: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

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Cobaltaustinite details from Handbook of Mineralogy (PDF)
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  • Specimens:The following Cobaltaustinite specimens are currently listed for sale on minfind.com.

    Localities for Cobaltaustinite

    The 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. ? 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
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