Quantifying the A-site occupancy in amphiboles: a Raman study in the OH-stretching region

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Marco E. Ciriotti
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Quantifying the A-site occupancy in amphiboles: a Raman study in the OH-stretching region

Messaggio da Marco E. Ciriotti » lun 26 feb, 2018 11:27

Prossima pubblicazione.

Referenza:
▪ Della Ventura, G., Sbroscia, M., Iezzi, G., Sodo, A. (2018): Quantifying the A-site occupancy in amphiboles: a Raman study in the OH-stretching region. European Journal of Mineralogy, 30, (in press).
Marco E. Ciriotti

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TOSATO FABIO
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Re: Quantifying the A-site occupancy in amphiboles: a Raman study in the OH-stretching region

Messaggio da TOSATO FABIO » lun 26 feb, 2018 19:35

Complimenti agli autori.
Tosato Fabio
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Noi siamo anche quello che non siamo riusciti ad essere.
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Marco E. Ciriotti
Messaggi: 24906
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Re: Quantifying the A-site occupancy in amphiboles: a Raman study in the OH-stretching region

Messaggio da Marco E. Ciriotti » sab 09 giu, 2018 15:54

Referenza:
▪ Della Ventura, G., Sbroscia, M., Iezzi, G., Sodo, A. (2018): Quantifying the A-site occupancy in amphiboles: a Raman study in the OH-stretching region. European Journal of Mineralogy, 30, (in press).

Abstract:
The amphibole group of minerals comprises a large number of species, some of which have typically fibrous shapes and are thus of interest for environmental hazard issues. Their identification is complicated by the presence of light elements (H and Li), multi-valence elements (e.g. Fe, Mn) and a partially vacant structural site. Vibrational spectroscopies are valuable tools to address the quantitative determination of occupancies in amphiboles: however, whilst Fourier-Transform Infra-Red Spectroscopy (FTIR) has been preferentially used in crystal-chemical studies, Raman spectroscopy has been restricted to asbestos identification. In this work we focus our attention on two sets of well-characterised synthetic amphiboles, i.e. on samples along the potassium-richterite − tremolite join, and the Na(NaMg)Mg5Si8O22(OH)2 compound synthesised at different T and P conditions. We show that the Raman spectra in the OH-stretching region are very similar, in terms of band shape and multiplicity to the FTIR spectra; however, the relative intensity of the Raman peaks provides direct quantitative information on the A-site occupancy, a feature that has significant implications as a tool for asbestos studies.
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: 24906
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
Contatta:

Re: Quantifying the A-site occupancy in amphiboles: a Raman study in the OH-stretching region

Messaggio da Marco E. Ciriotti » gio 20 set, 2018 11:48

Referenza:
▪ Della Ventura, G., Sbroscia, M., Iezzi, G., Sodo, A. (2018): Quantifying the A-site occupancy in amphiboles: a Raman study in the OH-stretching region. European Journal of Mineralogy, 30, 429-436.

Abstract:
The amphibole group of minerals comprises a large number of species, some of which have typically fibrous shapes and are thus of interest for environmental hazard issues. Their identification is complicated by the presence of light elements (H and Li), multi-valence elements (e.g. Fe, Mn) and a partially vacant structural site. Vibrational spectroscopies are valuable tools to address the quantitative determination of occupancies in amphiboles: however, whilst Fourier-Transform Infra-Red Spectroscopy (FTIR) has been preferentially used in crystal-chemical studies, Raman spectroscopy has been restricted to asbestos identification. In this work we focus our attention on two sets of well-characterised synthetic amphiboles, i.e. on samples along the potassium-richterite − tremolite join, and the Na(NaMg)Mg5Si8O22(OH)2 compound synthesised at different T and P conditions. We show that the Raman spectra in the OH-stretching region are very similar, in terms of band shape and multiplicity to the FTIR spectra; however, the relative intensity of the Raman peaks provides direct quantitative information on the A-site occupancy, a feature that has significant implications as a tool for asbestos studies.
Marco E. Ciriotti

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

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