Synthesis and crystal-chemistry of the synthetic P21/m amphibole Na(NaMg)Mg5Si8O22(OH)2. (Articolo in rivista)

Type

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

Label

• Synthesis and crystal-chemistry of the synthetic P21/m amphibole Na(NaMg)Mg5Si8O22(OH)2. (Articolo in rivista) (literal)

Anno

• 2004-01-01T00:00:00+01:00 (literal)

Alternative label

• Iezzi G., Della Ventura G., Oberti R., Cámara F., Holtz F. (2004)
  Synthesis and crystal-chemistry of the synthetic P21/m amphibole Na(NaMg)Mg5Si8O22(OH)2.
  in The American mineralogist
  (literal)

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

• Iezzi G., Della Ventura G., Oberti R., Cámara F., Holtz F. (literal)

Pagina inizio

• 640 (literal)

Pagina fine

• 646 (literal)

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• 89 (literal)

Rivista

• ?The ?American mineralogist (Rivista)

Note

• ISI Web of Science (WOS) (literal)

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• GIANLUCA IEZZI,1,2,+ GIANCARLO DELLA VENTURA,2,* ROBERTA OBERTI,3 FERNANDO CÁMARA,3 AND FRANÇOIS HOLTZ4 1Bayerisches Geoinstitut, Universität Bayreuth, D-95440 Bayreuth, Germany 2Dipartimento di Scienze Geologiche, Università di Roma Tre, Largo S. Leonardo Murialdo 1, I-00146 Roma, Italy 3CNR-Istituto di Geoscienze e Georisorse, sezione di Pavia, via Ferrata 1, I-27100 Pavia, Italy 4Institut für Mineralogie, Universität Hannover, Welfengarten 1, D-30167, Germany (literal)

Titolo

• Synthesis and crystal-chemistry of the synthetic P21/m amphibole Na(NaMg)Mg5Si8O22(OH)2. (literal)

Abstract

• In the present work, we characterize the amphibole Na(NaMg)Mg5Si8O22(OH)2 synthesized at 0.4 GPa and 750, 800, and 850 °C, and 0.5 GPa, 900 °C. Experiments at 800 and 900 °C yielded crystals suitable for single-crystal data collection. Structure refinement shows that synthetic Na(NaMg)Mg5Si8O22(OH)2 has P21/m symmetry at room T. The two non-equivalent tetrahedral double-chains differ in their degree of stretching and kinking. The infrared spectrum of synthetic Na(NaMg)Mg5Si8O22(OH)2 has two well-defined absorption bands at 3742 and 3715 cm-1 which can be assigned to O-H bands associated with the two independent anion sites (O3A and O3B) in the structure. The higher frequency band is assigned to the shorter O3B-H2 bond, and the lower frequency band is assigned to the longer O3A-H1 bond. The broader shape of the 3743 cm-1 band is consistent with a stronger interaction of the H2 atom with ANa, which is confirmed by structure refinement. Increasing T of synthesis causes a progressive departure from the ideal stoichiometry via the A1BMg1ANa-1BNa-1 substitution, as confirmed by EMPA, structure refinement, and FTIR spectroscopy. (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)
• FERNANDO CAMARA ARTIGAS (Persona)

Insieme di parole chiave

• Parole chiave di "Synthesis and crystal-chemistry of the synthetic P21/m amphibole Na(NaMg)Mg5Si8O22(OH)2." (Insieme di parole chiave)

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Autore CNR di

• ROBERTA MARIA OBERTI (Persona)
• FERNANDO CAMARA ARTIGAS (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 "Synthesis and crystal-chemistry of the synthetic P21/m amphibole Na(NaMg)Mg5Si8O22(OH)2." (Insieme di parole chiave)