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Malayaite ceramic pigments: A combined optical spectroscopy and neutron/X-ray diffraction study
dc.contributor.author | Cruciani, Giuseppe | |
dc.contributor.author | Dondi, Michele | |
dc.contributor.author | Ardit, Matteo | |
dc.contributor.author | Lyubenova, Teodora | |
dc.contributor.author | Carda Castelló, Juan Bautista | |
dc.contributor.author | Matteucci, Francesco | |
dc.contributor.author | Costa, Anna Luisa | |
dc.date.accessioned | 2012-08-07T09:56:02Z | |
dc.date.available | 2012-08-07T09:56:02Z | |
dc.date.issued | 2009 | |
dc.identifier | http://dx.doi.org/10.1016/j.materresbull.2009.03.006 | |
dc.identifier.citation | Materials Research Bulletin, 44, 8, p. 1778-1785 | |
dc.identifier.issn | 255408 | |
dc.identifier.uri | http://hdl.handle.net/10234/43742 | |
dc.description.abstract | 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. | |
dc.language.iso | eng | |
dc.publisher | Elsevier | |
dc.rights.uri | http://rightsstatements.org/vocab/CNE/1.0/ | * |
dc.subject | A. Ceramics | |
dc.subject | C. X-ray diffraction | |
dc.subject | D. Crystal structure | |
dc.subject | D. Optical properties | |
dc.title | Malayaite ceramic pigments: A combined optical spectroscopy and neutron/X-ray diffraction study | |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | http://dx.doi.org/10.1016/j.materresbull.2009.03.006 | |
dc.rights.accessRights | info:eu-repo/semantics/restrictedAccess |
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