Malayaite ceramic pigments: A combined optical spectroscopy and neutron/X-ray diffraction study
Impacte
Scholar |
Altres documents de l'autoria: Cruciani, Giuseppe; Dondi, Michele; Ardit, Matteo; Lyubenova, Teodora; Carda Castelló, Juan Bautista; Matteucci, Francesco; Costa, Anna Luisa
Metadades
Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7053
comunitat-uji-handle3:10234/8639
comunitat-uji-handle4:
INVESTIGACIONAquest recurs és restringit
http://dx.doi.org/10.1016/j.materresbull.2009.03.006 |
Metadades
Títol
Malayaite ceramic pigments: A combined optical spectroscopy and neutron/X-ray diffraction studyAutoria
Data de publicació
2009Editor
ElsevierISSN
255408Cita bibliogràfica
Materials Research Bulletin, 44, 8, p. 1778-1785Tipus de document
info:eu-repo/semantics/articleParaules clau / Matèries
Resum
Ceramic pigments based on the Cr-doped malayaite structure were synthesized by solid state reaction and characterized by optical spectroscopy and combined X-ray and neutron powder diffraction in order to elucidate the ... [+]
Ceramic pigments based on the Cr-doped malayaite structure were synthesized by solid state reaction and characterized by optical spectroscopy and combined X-ray and neutron powder diffraction in order to elucidate the still unclear chromium substitution mechanisms. The results show that coloration is actually due to simultaneous occurrence of Cr<sup>4+</sup> and Cr<sup>3+</sup> ions in the crystal lattice. Spectroscopy data confirm that Cr<sup>4+</sup> is replacing Sn<sup>4+</sup> in the octahedral site and, in minor amount, Si<sup>4+</sup> in the tetrahedral site. In addition, neutron powder diffraction data suggest that Cr<sup>3+</sup> substitution for octahedral Sn<sup>4+</sup> is charge balanced by the formation of oxygen vacancies with no preference over the different oxygen sites. Upon incorporation of Cr ion, the SnO<sub>6</sub> octahedra exhibit an off-centre displacement of central cation which in turn induces a rearrangement of both the octahedral and tetrahedral coordination shells. © 2009 Elsevier Ltd. All rights reserved. [-]
Drets d'accés
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/restrictedAccess
info:eu-repo/semantics/restrictedAccess
Apareix a les col.leccions
- QUIO_Articles [705]