Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Cobaltarthurite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
(Co,Mg)Fe23+(AsO4)2(OH)2 · 4H2O
System:
Monoclinic
Colour:
yellowish brown to straw ...
Lustre:
Vitreous, Silky
Hardness:
3½ - 4
Member of:
Name:
Named as the cobalt analogue of Arthurite.
Arthurite Group.
The cobalt analogue of Arthurite.

Classification of Cobaltarthurite

Approved 2001
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
mindat.org URL:
http://www.mindat.org/min-11113.html
Please feel free to link to this page.

Type Occurrence of Cobaltarthurite

General Appearance of Type Material:
globular and pellet-like aggregates up to 1.5 mm in diameter, consisiting of radial fibers and non-fibrous material

Physical Properties of Cobaltarthurite

Vitreous, Silky
Diaphaneity (Transparency):
Translucent
Colour:
yellowish brown to straw yellow
Streak:
white to pale brown
Hardness (Mohs):
3½ - 4
Hardness Data:
Measured
Cleavage:
None Observed
none
Density:
3.22 g/cm3 (Measured)    

Crystallography of Cobaltarthurite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 10.27Å, b = 9.72Å, c = 5.545Å
β = 94.46°
Ratio:
a:b:c = 1.057 : 1 : 0.57
Unit Cell Volume:
V 551.85 ų
Z:
2

Optical Data of Cobaltarthurite

Type:
Biaxial (+)
RI values:
nα = 1.741 nβ = 1.762 nγ = 1.797
Max Birefringence:
δ = 0.056
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High

Chemical Properties of Cobaltarthurite

Formula:
(Co,Mg)Fe23+(AsO4)2(OH)2 · 4H2O
Essential elements:
All elements listed in formula:

Relationship of Cobaltarthurite to other Species

Member of:
Other Members of Group:
ArthuriteCuFe23+(AsO4)2(OH)2 · 4H2O
BendadaiteFe2+Fe23+(AsO4)2(OH)2 · 4H2O
EarlshannoniteMn2+Fe23+(PO4)2(OH)2 · 4H2O
KunatiteCuFe23+(PO4)2(OH)2 · 4H2O
OjuelaiteZnFe23+(AsO4)2(OH)2 · 4H2O
UKI-2006-(PO:AlCuFeH)Fe2+Al3(PO4)2(OH)2 · 4H2O
UKI-2006-(PO:FeHZn)ZnFe23+(PO4)2(OH)2 · 4H2O
WhitmoreiteFe2+Fe23+(PO4)2(OH)2 · 4H2O
8.DC.05NissoniteCu2Mg2(PO4)2(OH)2 · 5H2O
8.DC.07EuchroiteCu2(AsO4)(OH) · 3H2O
8.DC.10LegranditeZn2(AsO4)(OH) · H2O
8.DC.12StrashimiriteCu8(AsO4)4(OH)4 · 5H2O
8.DC.15ArthuriteCuFe23+(AsO4)2(OH)2 · 4H2O
8.DC.15EarlshannoniteMn2+Fe23+(PO4)2(OH)2 · 4H2O
8.DC.15OjuelaiteZnFe23+(AsO4)2(OH)2 · 4H2O
8.DC.15WhitmoreiteFe2+Fe23+(PO4)2(OH)2 · 4H2O
8.DC.15BendadaiteFe2+Fe23+(AsO4)2(OH)2 · 4H2O
8.DC.15KunatiteCuFe23+(PO4)2(OH)2 · 4H2O
8.DC.15UKI-2006-(PO:FeHZn)ZnFe23+(PO4)2(OH)2 · 4H2O
8.DC.15UKI-2006-(PO:AlCuFeH)Fe2+Al3(PO4)2(OH)2 · 4H2O
8.DC.17KleemaniteZnAl2(PO4)2(OH)2 · 3H2O
8.DC.20BermaniteMn2+Mn23+(PO4)2(OH)2 · 4H2O
8.DC.20CoralloiteMn2+Mn23+(AsO4)2(OH)2 · 4H2O
8.DC.22KovdorskiteMg2(PO4)(OH) · 3H2O
8.DC.25FerristrunziteFe3+Fe23+(PO4)2(OH)3 · 5H2O
8.DC.25FerrostrunziteFe2+Fe23+(PO4)2(OH)2 · 6H2O
8.DC.25MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
8.DC.25MetavivianiteFe2+Fe23+(PO4)2(OH)2 · 6H2O
8.DC.25StrunziteMn2+Fe23+(PO4)2(OH)2 · 6H2O
8.DC.27BerauniteFe2+Fe53+(PO4)4(OH)5 · 6H2O
8.DC.30GordoniteMgAl2(PO4)2(OH)2 · 8H2O
8.DC.30LaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
8.DC.30MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2O
8.DC.30ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
8.DC.30PseudolaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
8.DC.30SigloiteFe3+Al2(PO4)2(OH)3 · 7H2O
8.DC.30StewartiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
8.DC.30UshkoviteMgFe23+(PO4)2(OH)2 · 8H2O
8.DC.30FerrolaueiteFe2+Fe23+(PO4)2(OH)2 · 8H2O
8.DC.30Kastningite(Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2O
8.DC.30MaghrebiteMgAl2(AsO4)2(OH)2 · 8H2O
8.DC.30NordgauiteMnAl2(PO4)2(F,OH)2 · 5H2O
8.DC.32TinticiteFe3+5.34(PO4)3.62(VO4)0.38(OH)4 · 6.7H2O
8.DC.35VauxiteFe2+Al2(PO4)2(OH)2 · 6H2O
8.DC.37VantasseliteAl4(PO4)3(OH)3 · 9H2O
8.DC.40CacoxeniteFe243+Al(PO4)17O6(OH)12 · 17H2O
8.DC.45Gormanite(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O
8.DC.45Souzalite(Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O
8.DC.47KingiteAl3(PO4)2F2(OH) · 7H2O
8.DC.50WavelliteAl3(PO4)2(OH,F)3 · 5H2O
8.DC.50AllanpringiteFe33+(PO4)2(OH)3 · 5H2O
8.DC.52KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2O
8.DC.55MapimiteZn2Fe33+(AsO4)3(OH)4 · 10H2O
8.DC.57OgdensburgiteCa2Fe43+(Zn,Mn2+)(AsO4)4(OH)6 · 6H2O
8.DC.60Nevadaite(Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2O
8.DC.60Cloncurryite(Cu,VO)Al2(PO4)2(F,OH)2 · 4.5-5H2O

Other Names for Cobaltarthurite

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 Cobaltarthurite

Reference List:
Jambor, J. L., Vinals, J., Groat, L. A. and Raudsepp, M. (2002): Cobaltarthurite, Co2+Fe3+2(AsO4)2(OH)2.4H2O, a new member of the arthurite group. Canadian Mineralogist, 40, 725-732.

Raudsepp, M., E. Pani (2002): The crystal structure of cobaltarthurite, Co2+Fe3+2(AsO4)2(OH)2*4H2O, a Rietveld refinement. Can. Mineral. 40, 733-737.

Kampf, A.R. (2005): The crystal structure of cobaltarthurite from the Bou Azzer District, Morocco: the location of hydrogen atoms in the arthurite structure-type. Canadian Mineralogist, 43, 1387-1391.

Internet Links for Cobaltarthurite

Localities for Cobaltarthurite

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.
Finland
 
  • Lapland Region
    • Inari
      • Lemmenjoki
        • Miessijoki River
Tuisku, Pekka 2010. Heavy minerals from gold sluicing in Lapland Gold Rush area and their bearing on the origin of gold bearing tills. Res Terrae, Ser A, N:o 31. Proceedings of the Nordic Mineralogical Network V annual Meeting.
Morocco
 
  • Souss-Massa-Draâ Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azer District (Bou Azzer District)
          • Khder
A.R. Kampf : "Cobaltarthurite from the Bou Azzer district, Morocco", 5th International Conference "Mineralogy & Museums", Paris, Sept. 5-8th 2004, Bull. de Liaison de la Soc. Franç. de Minéralogie et Cristallographie, 2004, Vol 16, N°2.; Georges Favreau collection - 2007
          • Oumlil
A.R. Kampf : "Cobaltarthurite from the Bou Azzer district, Morocco", 5th International Conference "Mineralogy & Museums", Paris, Sept. 5-8th 2004, Bull. de Liaison de la Soc. Franç. de Minéralogie et Cristallographie, 2004, Vol 16, N°2.
Spain (TL)
 
  • Murcia
    • Mazarrón-Águilas
      • Pastrana
Can Min (2002) 40 (2), 725-732; Lapis 2002(11), 29
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2015, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: August 29, 2015 18:06:08 Page generated: August 25, 2015 01:59:09