Changes in the local coordination of trace rare-earth elements in garnets by high-energy XAFS: new data on dysprosium. (Articolo in rivista)

Type

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

Label

• Changes in the local coordination of trace rare-earth elements in garnets by high-energy XAFS: new data on dysprosium. (Articolo in rivista) (literal)

Anno

• 2004-01-01T00:00:00+01:00 (literal)

Alternative label

• Quartieri S.; Dalconi M.C.; Boscherini F.; Oberti R.; D’Acapito F. (2004)
  Changes in the local coordination of trace rare-earth elements in garnets by high-energy XAFS: new data on dysprosium.
  in Physics and chemistry of minerals
  (literal)

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

• Quartieri S.; Dalconi M.C.; Boscherini F.; Oberti R.; D’Acapito F. (literal)

Pagina inizio

• 162 (literal)

Pagina fine

• 167 (literal)

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• 31 (literal)

Rivista

• Physics and chemistry of minerals (Rivista)

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• n.3 (literal)

Note

• ISI Web of Science (WOS) (literal)

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• Dipartimento di Scienze della Terra, Salita Sperone 31, 98166 Messina S. Agata, Italy Dipartimento di Scienze della Terra, C.so Ercole I0 d'Este 32, 44100 Ferrara, Italy INFM and Dipartimento di Fisica, Universita` di Bologna,Viale Berti Pichat 6/2, 40127 Bologna, Italy CNR, Istituto di Geoscienze e Georisorse,sezione di Pavia, via Ferrata 1, 27100 Pavia, Italy INFM, Operative Group in Grenoble,c/o European Synchrotron Radiation Facility,GILDA CRG, BP 220, 38043 Grenoble, France (literal)

Titolo

• Changes in the local coordination of trace rare-earth elements in garnets by high-energy XAFS: new data on dysprosium. (literal)

Abstract

• The site location and local geometry of trace amounts (299 ppm) of dysprosium in a natural melanite garnet from a carbonatitic rock have been studied by high-energy fluorescence-detected X-ray absorption fine-structure spectroscopy (XAFS). Measurements were done at the Dy K-edge (53789 eV). Data analysis shows that Dy (i.r. = 0.98 Å) is incorporated at the X site, similarly to other REE, namely Nd (i.r. = 1.11 Å) and Ce (i.r. = 1.14 Å). Comparison of the XAFS data obtained for these three REE and for Ca shows that, within a given garnet composition, the difference in the local geometry can be modelled in terms of differences in the ionic radii. On the contrary, the local coordination of the individual cations is different in distinct garnet compositions, in contrast to what was suggested by previous atomistic simulations of the garnet structure. Comparison of the local coordination geometries available in the literature shows that the Young modulus of the X site strongly depends on the major-element composition of all the structural sites. Both these points are important for Earth Sciences, and especially for geochemical modelling of trace-element incorporation and partitioning. (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

• Physics and chemistry of minerals (Rivista)

Insieme di parole chiave di

• Parole chiave di "Changes in the local coordination of trace rare-earth elements in garnets by high-energy XAFS: new data on dysprosium." (Insieme di parole chiave)