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A mineral closely related to Cyanotrichite, but often misidentified (old published X-ray powder diffraction data of both species are unreliable; much improved data were recently given by Hager et al. (2009)).
Although the mineral shows a close relation to cyanotrichite, it is even more closely related to camerolaite.
PXRD and chemical analysis are necessary for a correct identification.
Previously, it was thought that quantitative measurements of the carbonate contents were needed for a correct identification, and that qualitative tests were not conclusive, because cyanotrichite can apparently contain small amounts of carbonate. However, Hager et al. (2009) suggest that there is no evidence for solid solution between cyanotrichite and carbonatecyanotrichite; it is also evident that some carbonatecyanotrichite specimens contain no sulfate. This explains previous contradictory results from PXRD and chemical studies of given samples.
The nomenclature situation is still complicated because the crystal structures of neither mineral is presently known.
Visually similar to Khaidarkanite.
Classification of Carbonatecyanotrichite
|Strunz 8th edition ID:||6/D.08-30|
|Strunz 9th edition ID:||7.D0.|
|Nickel-Strunz 10th (pending) edition ID:||7.DE.10|
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
E : With only medium-sized cations; unclassified
|Dana 8th edition ID:||16b.7.7.1|
16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
|Hey's CIM Ref.:||12.2.7|
12 : Carbonates with other anions
2 : Carbonates with sulphate
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Type Occurrence of Carbonatecyanotrichite
|Type Locality:||Balasauskandyk V Deposit, Karatau Range, Southern Kazakhstan Province (Ongtüstik Qazaqstan Oblysy; Yuzhno-Kazakhstanskaya Oblast'), Kazakhstan|
|Year of Discovery:||1963|
Physical Properties of Carbonatecyanotrichite
Crystallography of Carbonatecyanotrichite
|X-Ray Powder Diffraction:|
|Comments:||For type material|
Optical Data of Carbonatecyanotrichite
|RI values:||nα = 1.616 nβ = 1.630 nγ = 1.677|
|2V:||Measured: 55° to 60°, Calculated: 60°|
|Maximum Birefringence:||δ = 0.061|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Carbonatecyanotrichite
|Simplified for copy/paste:||Cu4Al2(CO3,SO4)(OH)12·2H2O|
|Essential elements:||Al, C, Cu, H, O|
|All elements listed in formula:||Al, C, Cu, H, O, S|
Relationship of Carbonatecyanotrichite to other Species
|Structurally related to group(s):|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Carbonatecyanotrichite
|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 Carbonatecyanotrichite
ANKINOVICH, E. A., GEKHT, I. I. & ZAITSEVA, R. I. (1963): A new variety of cyanotrichite - carbonate-cyanotrichite. Zap. Vses. Mineral. Obshch. 92, 458-463.
American Mineralogist: 49: 441.
Gröbner, J. (1997): Mineralien der Cyanotrichit-Gruppe aus Fundorten in Österreich. - Mineralien-Welt 8 (3), 27-30. (in German)
Hager, S. L., Leverett, P. & Williams, P. A. (2009): Possible structural and chemical relationships in the cyanotrichite group. Canadian Mineralogist 47, 635-648.
Internet Links for Carbonatecyanotrichite
Localities for Carbonatecyanotrichite
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: São Pedro, Óbidos, Leiria District, PortugalFrom Rui Nunes, 26th Nov 2014 13:44:31