Structural relaxation around Cr3+ at the Na(Al1-xCrx)P2O7 octahedral site: an XRPD and EAS study (Articolo in rivista)

Type

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

Label

• Structural relaxation around Cr3+ at the Na(Al1-xCrx)P2O7 octahedral site: an XRPD and EAS study (Articolo in rivista) (literal)

Anno

• 2014-01-01T00:00:00+01:00 (literal)

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

• 10.1515/zkri-2014-1757 (literal)

Alternative label

• Ardit, Matteo; Dondi, Michele; Zanelli, Chiara; Cruciani, Giuseppe (2014)
  Structural relaxation around Cr3+ at the Na(Al1-xCrx)P2O7 octahedral site: an XRPD and EAS study
  in Zeitschrift für Kristallographie
  (literal)

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

• Ardit, Matteo; Dondi, Michele; Zanelli, Chiara; Cruciani, Giuseppe (literal)

Pagina inizio

• 687 (literal)

Pagina fine

• 697 (literal)

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

• 229 (literal)

Rivista

• Zeitschrift für Kristallographie (Rivista)

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

• 11 (literal)

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

• 10 (literal)

Note

• ISI Web of Science (WOS) (literal)

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

• Univ Ferrara; CNR (literal)

Titolo

• Structural relaxation around Cr3+ at the Na(Al1-xCrx)P2O7 octahedral site: an XRPD and EAS study (literal)

Abstract

• The isovalent substitution of chromium for aluminium at octahedral site along the Na(Al1-xCrx)P2O7 pyrophosphate solid solution has been investigated by means of the combined application of X-ray powder diffraction (XRPD) and electronic absorption spectroscopy (EAS). In agreement with the structural refinements, deconvolution of the optical spectra revealed a progressive decreasing of the crystal field strength parameter 10Dq moving toward the NaCrP2O7 end-member, meaning that the local chromium-oxygen bond distance increased along the join with the amount of chromium. The calculated structural relaxation coefficient around the substituent ion Cr3+ was epsilon=0.97 (i.e., very close to that predicted by the Hard Spheres model). A detailed comparison with compact crystal structures (i.e., perovskite, garnet, spinel, clinopyroxene, and corundum) as well as with other pyrophosphate compounds with II-NaMP2O7 structure-type (with M=Al, Cr, Fe, V, Ti, Mo and In) highlighted that compounds belonging to the Na(Al1-xCrx)P2O7 solid solution - characterized by a network connectivity which is basically a framework topology - undergo a structural relaxation that is confined within the first shell (i.e., occurs at the octahedral site), while P2O7 dimers act as rigid units. (literal)

Prodotto di

• Tecnologie innovative per l'edilizia (SP.P01.037.003) (Modulo)
• Institute of science and technology for ceramics (ISTEC) (Istituto)

Autore CNR

• CHIARA ZANELLI (Persona)
• MICHELE DONDI (Unità di personale interno)

Insieme di parole chiave

• Parole chiave di "Structural relaxation around Cr3+ at the Na(Al1-xCrx)P2O7 octahedral site: an XRPD and EAS study" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute of science and technology for ceramics (ISTEC) (Istituto)
• Tecnologie innovative per l'edilizia (SP.P01.037.003) (Modulo)

Autore CNR di

• MICHELE DONDI (Unità di personale interno)
• CHIARA ZANELLI (Persona)

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

• Zeitschrift für Kristallographie (Rivista)

Insieme di parole chiave di

• Parole chiave di "Structural relaxation around Cr3+ at the Na(Al1-xCrx)P2O7 octahedral site: an XRPD and EAS study" (Insieme di parole chiave)