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|Glaucocerinite Group > Hydrotalcite Supergroup|
As part of the recent re-evaluation of the nomenclature of the hydrotalcite supergroup (Mills et al., 2012), carrboydite was identified as a questionable species which needs further investigation.
Classification of Carrboydite
|IMA status:||Questionable/Doubtful 2012|
|Strunz 8th edition ID:||6/D.08-90|
|Nickel-Strunz 10th (pending) edition ID:||7.DD.35|
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra
|Dana 8th edition ID:||188.8.131.52|
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
10 : Miscellaneous
|Hey's CIM Ref.:||12.2.22|
12 : Carbonates with other anions
2 : Carbonates with sulphate
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Type Occurrence of Carrboydite
|Type Locality:||Carr Boyd Rocks Ni mine (Carr Boyd Ni mine), Menangina Station, Menzies Shire, Western Australia, Australia|
|Year of Discovery:||1974|
Physical Properties of Carrboydite
Crystallography of Carrboydite
|Cell Parameters:||a = 9.14Å, c = 10.34Å|
|Ratio:||a:c = 1 : 1.131|
|Unit Cell Volume:||V 748.07 Å³ (Calculated from Unit Cell)|
Optical Data of Carrboydite
|RI values:||nω = 1.560 nε = 1.540|
|Maximum Birefringence:||δ = 0.020|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Carrboydite
|Simplified for copy/paste:||[(Ni1-xAlx)(OH)2][SO4]x/2·nH2O|
|Essential elements:||Al, H, Ni, O, S|
|All elements listed in formula:||Al, H, Ni, O, S|
Relationship of Carrboydite to other Species
|Member of:||Glaucocerinite Group > Hydrotalcite Supergroup|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Carrboydite
|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 Carrboydite
American Mineralogist: 61: 366-372.
Mineralogical Magazine: 44: 333-337.
Mills, S.J., Christy, A.G., Genin, J.-M.R., Kameda, T., Colombo, F. (2012): Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine, 76, 1289-1336.
Internet Links for Carrboydite
Localities for Carrboydite
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.
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Locality Updated: Herdade de Trajanes Mine, São Luís, Odemira, Beja District, PortugalFrom Rui Nunes, 20th Dec 2014 22:18:40