Cobaltarthurite (original) (raw)
A valid IMA mineral species
About CobaltarthuriteHide
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Formula:
CoFe3+2(AsO4)2(OH)2 · 4H2O
Minor Mg and Fe(II) may replace Co.
Colour:
Yellowish brown to straw yellow
Crystal System:
Monoclinic
Name:
Named as the cobalt analogue of arthurite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:11113:5
c798e9e9-0e33-4cc5-acad-4a23b29fd6bc
IMA Classification of CobaltarthuriteHide
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Type description reference:
Jambor, J. L., Vinals, J., Groat, L. A., Raudsepp, M. (2002) Cobaltarthurite, Co2+Fe3+2(AsO4)2(OH)2·4H2O, a new member of the arthurite group. The Canadian Mineralogist, 40 (2) 725-732 doi:10.2113/gscanmin.40.2.725
Classification of CobaltarthuriteHide
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8.DC.15
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
42.11.20.5
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Caru | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of CobaltarthuriteHide
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Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Sorry, your browser doesn't support HTML5 audio. | Jolyon Ralph | United Kingdom |
Physical Properties of CobaltarthuriteHide
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Colour:
Yellowish brown to straw yellow
Streak:
White to pale brown
Cleavage:
None Observed
none
Density:
3.22 g/cm3 (Measured)
Optical Data of CobaltarthuriteHide
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RI values:
_n_α = 1.741 _n_β = 1.762 _n_γ = 1.797
δ = 0.056
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Optical Extinction:
Parallel extinction and length slow. Z ≃ c.
Comments:
X = almost colorless; Z = medium yellow.
Comments:
Absorption: Z > X, Y.
Chemistry of CobaltarthuriteHide
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Mindat Formula:
CoFe3+2(AsO4)2(OH)2 · 4H2O
Minor Mg and Fe(II) may replace Co.
Crystallography of CobaltarthuriteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 10.27 Å, b = 9.72 Å, c = 5.545 Å
β = 94.46°
Ratio:
a:b:c = 1.057 : 1 : 0.57
Crystal StructureHide
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X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.04 Å | (100) |
| 10.2 Å | (95) |
| 4.81 Å | (65) |
| 4.24 Å | (60) |
| 2.87 Å | (55) |
| 2.89 Å | (25) |
| 4.51 Å | (20) |
Comments:
Dolores showing, near Pastrana, Spain. Data are from the type description.
Geological EnvironmentHide
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Type Occurrence of CobaltarthuriteHide
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General Appearance of Type Material:
Globular and pellet-like aggregates up to 1.5 mm in diameter, consisting of radial fibers and non-fibrous material.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, Ontario, Canada, NMNMC 83399.
Geological Setting of Type Material:
Oxidation zone of a presumed prior sulfide deposit.
Associated Minerals at Type Locality:
Reference:
Jambor, J.L., Vinals, J., Groat, L.A., Raudsepp, M. (2002) Cobaltarthurite, Co2+Fe3+2(AsO4)2(OH)2.4H2O, a new member of the arthurite group. The Canadian Mineralogist: 40: 725-732.
Synonyms of CobaltarthuriteHide
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Other Language Names for CobaltarthuriteHide
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Relationship of Cobaltarthurite to other SpeciesHide
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Other Members of this group:
Common AssociatesHide
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Associated Minerals Based on Photo Data:
| 13 photos of Cobaltarthurite associated with Arseniosiderite | Ca2Fe3+3(AsO4)3O2 · 3H2O |
|---|---|
| 5 photos of Cobaltarthurite associated with Arsenocrandallite | CaAl3(AsO4)(AsO3OH)(OH)6 |
| 5 photos of Cobaltarthurite associated with Barahonaite-(Fe) | (Ca,Cu,Na,Fe3+,Al)12Fe3+2(AsO4)8(OH,Cl)x · nH2O |
| 5 photos of Cobaltarthurite associated with Yukonite | Ca3Fe3+(AsO4)2(OH)3 · 5H2O |
| 2 photos of Cobaltarthurite associated with Olivenite | Cu2(AsO4)(OH) |
| 2 photos of Cobaltarthurite associated with Arsenogoyazite | SrAl3(AsO4)(AsO3OH)(OH)6 |
| 1 photo of Cobaltarthurite associated with Barahonaite-(Al) | (Ca,Cu,Na,Fe3+,Al)12Al2(AsO4)8(OH,Cl)x · nH2O |
Related Minerals - Strunz-mindat GroupingHide
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| 8.DC. | Ianbruceite | Zn2(AsO4)(OH) · 3H2O | Mon. 2/m : _P_21/b |
|---|---|---|---|
| 8.DC. | Césarferreiraite | Fe2+ Fe3+2(AsO4)2(OH)2 · 8H2O | Tric. 1 : _P_1 |
| 8.DC. | Ferrivauxite | Fe3+Al2(PO4)2(OH)3 · 5H2O | Tric. 1 : _P_1 |
| 8.DC.05 | Nissonite | Cu2Mg2(PO4)2(OH)2 · 5H2O | Mon. 2/m : _B_2/b |
| 8.DC.07 | Euchroite | Cu2(AsO4)(OH) · 3H2O | Orth. 222 : _P_212121 |
| 8.DC.10 | Legrandite | Zn2(AsO4)(OH) · H2O | Mon. 2/m : _P_21/b |
| 8.DC.12 | Strashimirite | Cu8(AsO4)4(OH)4 · 5H2O | Mon. |
| 8.DC.15 | Arthurite | CuFe3+2(AsO4)2(OH)2 · 4H2O | Mon. 2/m : _P_21/b |
| 8.DC.15 | Earlshannonite | Mn2+Fe3+2(PO4)2(OH)2 · 4H2O | Mon. 2/m : _P_21/b |
| 8.DC.15 | Ojuelaite | ZnFe3+2(AsO4)2(OH)2 · 4H2O | Mon. 2/m : _P_21/b |
| 8.DC.15 | Whitmoreite | Fe2+Fe3+2(PO4)2(OH)2 · 4H2O | Mon. 2/m : _P_21/b |
| 8.DC.15 | Bendadaite | Fe2+Fe3+2(AsO4)2(OH)2 · 4H2O | Mon. 2/m : _P_21/b |
| 8.DC.15 | Kunatite | CuFe3+2(PO4)2(OH)2 · 4H2O | Mon. 2/m : _P_21/b |
| 8.DC.15 | UM2006-27-PO:FeHZn | ZnFe3+2(PO4)2(OH)2 · 4H2O | Mon. |
| 8.DC.15 | UKI-2006-(PO:AlCuFeH) | Fe2+Al3+2(PO4)2(OH)2 · 4H2O | |
| 8.DC.17 | Kleemanite | ZnAl2(PO4)2(OH)2 · 3H2O | Mon. |
| 8.DC.20 | Bermanite | Mn2+Mn3+2(PO4)2(OH)2 · 4H2O | Mon. 2/m : _P_2/b |
| 8.DC.20 | Coralloite | Mn2+Mn3+2(AsO4)2(OH)2 · 4H2O | Tric. 1 : _P_1 |
| 8.DC.20 | Magnesiobermanite | MgMn3+2(PO4)2(OH)2 · 4H2O | Mon. 2 : _P_21 |
| 8.DC.22 | Kovdorskite | Mg2(PO4)(OH) · 3H2O | Mon. 2/m : _P_21/b |
| 8.DC.25 | Ferristrunzite | Fe3+Fe3+2(PO4)2(OH)3 · 5H2O | Tric. |
| 8.DC.25 | Ferrostrunzite | Fe2+Fe3+2(PO4)2(OH)2 · 6H2O | Tric. |
| 8.DC.25 | Metavauxite | Fe2+Al2(PO4)2(OH)2 · 8H2O | Mon. 2/m : _P_21/b |
| 8.DC.25 | Metavivianite | Fe2+Fe3+2(PO4)2(OH)2 · 6H2O | Tric. 1 : _P_1 |
| 8.DC.25 | Strunzite | Mn2+Fe3+2(PO4)2(OH)2 · 6H2O | Tric. 1 : _P_1 |
| 8.DC.25 | Zincostrunzite | ZnFe3+2(PO4)2(OH)2 · 6.5H2O | Tric. 1 : _P_1 |
| 8.DC.27 | Beraunite | Fe3+6(PO4)4O(OH)4 · 6H2O | Mon. m : B b |
| 8.DC.27 | Tvrdýite | Fe2+Fe3+2 Al3(PO4)4(OH)5(H2O)4 · 2H2O | Mon. 2/m : _B_2/b |
| 8.DC.27 | Zincoberaunite | ZnFe3+5(PO4)4(OH)5 · 6H2O | Mon. 2/m : _B_2/b |
| 8.DC.30 | Gordonite | MgAl2(PO4)2(OH)2 · 8H2O | Tric. 1 : _P_1 |
| 8.DC.30 | Laueite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O | Tric. 1 : _P_1 |
| 8.DC.30 | Mangangordonite | Mn2+Al2(PO4)2(OH)2 · 8H2O | Tric. 1 : _P_1 |
| 8.DC.30 | Paravauxite | Fe2+Al2(PO4)2(OH)2 · 8H2O | Tric. 1 : _P_1 |
| 8.DC.30 | Pseudolaueite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O | Mon. 2/m : _P_21/b |
| 8.DC.30 | Sigloite | Fe3+Al2(PO4)2(OH)3 · 7H2O | Tric. 1 : _P_1 |
| 8.DC.30 | Stewartite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O | Tric. 1 : _P_1 |
| 8.DC.30 | Ushkovite | MgFe3+2(PO4)2(OH)2 · 8H2O | Tric. 1 : _P_1 |
| 8.DC.30 | Ferrolaueite | Fe2+Fe3+2(PO4)2(OH)2 · 8H2O | Tric. 1 : _P_1 |
| 8.DC.30 | Kastningite | (Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2O | Tric. 1 : _P_1 |
| 8.DC.30 | Maghrebite | MgAl2(AsO4)2(OH)2 · 8H2O | Tric. 1 : _P_1 |
| 8.DC.30 | Nordgauite | MnAl2(PO4)2(F,OH)2 · 5H2O | Tric. 1 : _P_1 |
| 8.DC.30 | Kayrobertsonite | [MnAl2(PO4)2(OH)2(H2O)4] · 2H2O | Tric. 1 : _P_1 |
| 8.DC.30 | Kummerite | Mn2+Fe3+Al(PO4)2(OH)2 · 8H2O | Tric. 1 : _P_1 |
| 8.DC.32 | Tinticite | Fe3+3(PO4)2(OH)3 · 3H2O | Tric. 1 : _P_1 |
| 8.DC.32 | Kamarizaite | Fe3+3(AsO4)2(OH)3 · 3H2O | Tric. 1 : _P_1 |
| 8.DC.35 | Vauxite | Fe2+Al2(PO4)2(OH)2 · 6H2O | Tric. 1 : _P_1 |
| 8.DC.37 | Vantasselite | Al4(PO4)3(OH)3 · 9H2O | Orth. |
| 8.DC.40 | Cacoxenite | Fe3+24AlO6(PO4)17(OH)12 · 75H2O | Hex. 6/m : _P_63/m |
| 8.DC.45 | Gormanite | (Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O | Tric. |
| 8.DC.45 | Souzalite | (Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O | Tric. 1 |
| 8.DC.47 | Kingite | Al3(PO4)2F2(OH) · 7H2O | Tric. |
| 8.DC.50 | Wavellite | Al3(PO4)2(OH,F)3 · 5H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 8.DC.50 | Allanpringite | Fe3+3(PO4)2(OH)3 · 5H2O | Mon. 2/m : _P_21/m |
| 8.DC.50 | Fluorwavellite | Al3(PO4)2(OH)2F · 5H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 8.DC.52 | Kribergite | Al5(PO4)3(SO4)(OH)4 · 4H2O | Tric. 1 : _P_1 |
| 8.DC.55 | Mapimite | Zn2Fe3+3(AsO4)3(OH)4 · 10H2O | Mon. m : B m |
| 8.DC.57 | Ogdensburgite | Ca2Fe3+4(Zn,Mn2+)(AsO4)4(OH)6 · 6H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : C m m m |
| 8.DC.60 | Nevadaite | (Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 8.DC.60 | Cloncurryite | Cu0.5(VO)0.5Al2(PO4)2F2 · 5H2O | Mon. 2/m : _P_21/b |
| 8.DC.62 | Kenngottite | Mn2+3Fe3+4(PO4)4(OH)6(H2O)2 | Mon. 2/m : _P_2/b |
| 8.DC.67 | Molinelloite | Cu(H2O)(OH)V4+O(V5+O4) | Tric. 1 : _P_1 |
| 8.DC.70 | Whitecapsite | H16Fe2+5Fe3+14Sb3+6(AsO4)18O16 · 120H2O | Hex. 6/m : _P_63/m |
| 8.DC.75 | Heimite | PbCu2(AsO4)(OH)3 · 2H2O | Mon. 2/m |
| 8.DC.80 | Lednevite | Cu[PO3(OH)] · H2O | Mon. 2/m : _P_21/b |
Fluorescence of CobaltarthuriteHide
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Other InformationHide
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Notes:
Readily soluble in 1:1 HCl, which rapidly turns yellowish.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for CobaltarthuriteHide
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References for CobaltarthuriteHide
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Reference List:
Jambor, J. L., Vinals, J., Groat, L. A., Raudsepp, M. (2002) Cobaltarthurite, Co2+Fe3+2(AsO4)2(OH)2·4H2O, a new member of the arthurite group. The Canadian Mineralogist, 40 (2) 725-732 doi:10.2113/gscanmin.40.2.725
Localities for CobaltarthuriteHide
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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.
Locality ListHide
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 
- Good crystals or important locality for species. 
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
| Brazil | |
|---|---|
| Pará Marabá ⓘ Salobo Mine | deMelo et al. (2017) |
| Finland | |
| Lapland Enontekiö Miessijoki River ⓘ Rapeli-Kangas claim ? | Tuisku (2010) |
| Italy | |
| Sardinia South Sardinia Province Gonnosfanadiga Fenugu Sibiri Mine ⓘ Pira Inferida | Caboni et al. (2018) |
| Morocco | |
| Drâa-Tafilalet Region Ouarzazate Province Amerzgane Cercle Ouisselsate Caïdat ⓘ Khder Mine | Georges Favreau collection - 2007. +1 other reference |
| Zagora Province Agdz Cercle Tansifte Caïdat Oumlil ⓘ Oumlil Mine (incl. Oumlil East Mine) | Kampf (2004) |
| Spain (TL) | |
| Murcia Mazarrón Pastrana ⓘ La Reconquistada claim (TL) | Lapis 2002 (11) +1 other reference |