New data on nordite-(Ce) and the establishment of the nordite supergroup

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Marco E. Ciriotti
Messaggi: 28429
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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New data on nordite-(Ce) and the establishment of the nordite supergroup

Messaggio da Marco E. Ciriotti » ven 14 mag, 2021 17:21

Prossima pubblicazione.

Referenza:
▪ Dal Bo, F., Gulbransen, E.H., Friis, H. (2021): New data on nordite-(Ce) and the establishment of the nordite supergroup. Mineralogical Magazine, 85, (in press).

Abstract:
A nomenclature scheme has been set up for the nordite supergroup of minerals, which have the general formula A2BXYZT6O17 and where A = Na; B = Na, Ca; X = Sr, Ca, Ba; Y = REE, Sr; Z = Zn, Fe, Mn, Mg and T = Si. The nordite supergroup includes nordite-(La), nordite-(Ce), ferronordite-(La), ferronordite-(Ce) and manganonordite-(Ce), as well as meieranite which is considered as an unassigned member of the nordite supergroup. In the known nordite group minerals the Y site is occupied by REE, while in meieranite the Y site is occupied by Sr. The dominant element on the tetrahedral Z site determines the prefix used in the mineral name. New rootname must be given to species with a different dominant element on the A, B or X sites. Nordite supergroup minerals are orthorhombic, although nordite group minerals and meieranite crystallise in the Pcca and P21nb space group, respectively. The proposed nomenclature scheme for the nordite supergroup has been approved by the IMA-CNMNC. In addition, new chemical and structural investigations were performed on nordite-(Ce) from Igdlutalik, South Greenland, leading to the first crystal structure refinement for nordite-(Ce).
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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Marco E. Ciriotti
Messaggi: 28429
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
Contatta:

Re: New data on nordite-(Ce) and the establishment of the nordite supergroup

Messaggio da Marco E. Ciriotti » mer 28 lug, 2021 12:39

Pubblicazione effettuata.

Referenza:
▪ Dal Bo, F., Gulbransen, E.H., Friis, H. (2021): New data on nordite-(Ce) and the establishment of the nordite supergroup. Mineralogical Magazine, 85, 431-437.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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