FTIR spectroscopy of Ti-rich pargasites from Lherz and the detection of O2– at the anionic O3 site in amphiboles. (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• FTIR spectroscopy of Ti-rich pargasites from Lherz and the detection of O2– at the anionic O3 site in amphiboles. (Articolo in rivista) (literal)

Anno

• 2007-01-01T00:00:00+01:00 (literal)

Alternative label

• Della Ventura G.; Oberti R.; Hawthorne F.C.; Bellatreccia F. (2007)
  FTIR spectroscopy of Ti-rich pargasites from Lherz and the detection of O2– at the anionic O3 site in amphiboles.
  in The American mineralogist
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Della Ventura G.; Oberti R.; Hawthorne F.C.; Bellatreccia F. (literal)

Pagina inizio

• 1645 (literal)

Pagina fine

• 1651 (literal)

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• 92 (literal)

Rivista

• ?The ?American mineralogist (Rivista)

Note

• ISI Web of Science (WOS) (literal)

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• GIANCARLO DELLA VENTURA,1,2,* ROBERTA OBERTI,2 FRANK C. HAWTHORNE,3 AND FABIO BELLATRECCIA1 1Dipartimento di Scienze Geologiche, Università Roma Tre, Largo S. Leonardo Murialdo 1, I-00146 Roma, Italy 2CNR-Istituto di Geoscienze e Georisorse, Unità di Pavia, via Ferrata 1, I-27100 Pavia, Italy 3Department of Geological Sciences, University of Manitoba, Winnipeg, R3T 2N2 Canada (literal)

Titolo

• FTIR spectroscopy of Ti-rich pargasites from Lherz and the detection of O2– at the anionic O3 site in amphiboles. (literal)

Abstract

• suite of well-characterized Ti-rich pargasites from Lherz (French Pyrenees). All amphiboles studied have fairly constant M-site composition, with [6]Altot ~0.55 atoms per formula unit (apfu), [6]Ti ~0.45 apfu, and [6]Fe3+ ~0.40 apfu. SIMS and SREF data show all samples to have an O3 anion composition of OH ? O2- ? 1.0 apfu, with negligible F. The FTIR spectra show for all samples a broad absorption consisting of several overlapping bands; three main components can be recognized: ~3710, 3686, and 3660 cm-1, respectively, with an asymmetric tail extending to lower frequency. Six Gaussian components can be fi tted to the spectra; comparison with spectra of both synthetic and natural pargasites allows fi ve of these components to be assigned to local confi gurations involving OH-O2- at the O3 site, thus showing that coupling with an O2- anion through an A-cation signifi cantly affects band position. Infrared spectroscopy can detect the presence of O2- in amphiboles in chemically favorable cases, i.e., in the absence of F. Moreover, the FTIR spectra show that all octahedral confi gurations involving M1Ti4+ or M1Fe3+ M3Fe3+ are associated with O2- at both adjacent O3 sites, and that M3Al is locally associated with OH, confi rming SRO models based on structure refi nement results. (literal)

Prodotto di

• Istituto di geoscienze e georisorse (IGG) (Istituto)
• Metodologie integrate per la conoscenza di processi e materiali geologici e del loro impatto sull'uomo e l'ambiente (TA.P04.014.002) (Modulo)

Autore CNR

• ROBERTA MARIA OBERTI (Persona)

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Autore CNR di

• ROBERTA MARIA OBERTI (Persona)

Prodotto

• Istituto di geoscienze e georisorse (IGG) (Istituto)
• Metodologie integrate per la conoscenza di processi e materiali geologici e del loro impatto sull'uomo e l'ambiente (TA.P04.014.002) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• ?The ?American mineralogist (Rivista)

Insieme di parole chiave di

• Parole chiave di "FTIR spectroscopy of Ti-rich pargasites from Lherz and the detection of O2– at the anionic O3 site in amphiboles." (Insieme di parole chiave)