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UM1998-07-CO:CaCeF

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Formula:
Ca6Ce16(CO3)22F16
Crystal System:
Trigonal
Regularly interstratified bastnäsite-(Ce)/synchysite-(Ce). Reported as "B10S6-II". Found as regular, mixed-layer structures within parisite-(Ce).

Co-described with 5 similar species: UM1998-04-CO:CaCeF, UM1998-05-CO:CaCeF, UM1998-06-CO:CaCeF, UM1998-08-CO:CaCeF, and UM1998-09-CO:CaCeF. Maximum diameter of this and the other species is ca. 0.5 micron.

Note the extremely large c parameter.


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Classification of UM1998-07-CO:CaCeFHide

Notes:
Unnamed (probably valid)

Chemical Properties of UM1998-07-CO:CaCeFHide

Formula:
Ca6Ce16(CO3)22F16

Crystallography of UM1998-07-CO:CaCeFHide

Crystal System:
Trigonal
Cell Parameters:
a = 7.10 Å, c = 310.86 Å
Ratio:
a:c = 1 : 43.783
Unit Cell V:
13,571.01 ų (Calculated from Unit Cell)
Comment:
Space group is R3m, R32, or R-3m

Other InformationHide

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 UM1998-07-CO:CaCeFHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Wu, X., Meng, D., Pan, Zh., Yang, G. (1998): Transmission electron microscopic study of new, regular, mixed-layer structures in calcium–rareearth fluorocarbonate minerals. Mineral. Mag.: 62: 55–64; in: Jambor, J.L., Kovalenker, V.A., Roberts, A.C. (1998): New mineral names. American Mineralogist: 83: 1119
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification (2012 Update). Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se (2016) (Update: 2012-01)

Internet Links for UM1998-07-CO:CaCeFHide

Localities for UM1998-07-CO:CaCeFHide

ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
China
 
Wu, X., Meng, D., Pan, Zh., Yang, G. (1998): Transmission electron microscopic study of new, regular, mixed-layer structures in calcium–rareearth fluorocarbonate minerals. Mineral. Mag.: 62: 55–64; in: Jambor, J.L., Kovalenker, V.A., Roberts, A.C. (1998): New mineral names. American Mineralogist: 83: 1119
 
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