Raman spectroscopic study of the natural carbonophosphates

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Marco E. Ciriotti
Messaggi: 28032
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy

Raman spectroscopic study of the natural carbonophosphates

Messaggio da Marco E. Ciriotti » mar 11 mag, 2021 11:46

▪ Kozlov, E.N., Fomina, E.N., Bocharov, V.N., Sidorov, M.Y., Vlasenko, N.S., Shilovskikh, V.V. (2021): A Raman spectroscopic study of the natural carbonophosphates Na3MCO3PO4 (M is Mn, Fe, and Mg), European Journal of Mineralogy, 33, 283–297.

Raman spectra of three natural carbonophosphates (sidorenkite, bonshtedtite, and bradleyite) with the general formula Na3MCO3PO4 (M is Mn, Fe, and Mg) were studied and compared. These spectra showed from 21 to 24 vibrational bands, of which the two most intense (964±5 and 1074±3 cm−1) correspond to the υ1(P–O) and υ1(C–O) modes. These two bands split into doublet peaks due to the occurrence of isomorphic impurities. It was found that the crystallographic orientation of the sample influences the intensity of most bands. Most bands assigned to the same vibrations showed a regular shift (the smallest in sidorenkite spectra, an intermediate in bonshtedtite, and the largest in bradleyite). We propose an algorithm that allows for diagnostics of carbonophosphates in inclusions by their Raman spectra, providing a reliable result even in the absence of energy-dispersive X-ray spectroscopy (EDX) data.
Marco E. Ciriotti

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