http://www.cnr.it/ontology/cnr/individuo/prodotto/ID43599
Malayaite Ceramic Pigments: a Combined Optical Spectroscopy and Neutron/X-ray Diffraction Study (Articolo in rivista)
- Type
- Label
- Malayaite Ceramic Pigments: a Combined Optical Spectroscopy and Neutron/X-ray Diffraction Study (Articolo in rivista) (literal)
- Anno
- 2009-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.materresbull.2009.03.006 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Giuseppe Cruciani.; Michele Dondi; Matteo Ardit ; Teodora Stoyanova Lyubenova; Juan B. Carda ; Francesco Matteucci ; Anna Luisa Costa (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://www.sciencedirect.com/science/article/pii/S0025540809000889 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
- In: Materials Research Bulletin, vol. 44 pp. 1778 - 1785. Elsevier Ltd, 2009. (literal)
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Cruciani, Ardit: Department of Earth Sciences, University of Ferrara
Dondi, Matteucci, Costa: CNR-ISTEC, Faenza
Stoyanova Lyubenova, Carda: Dept of Inorganic and Organic Chemistry, University Jaime I Castellon (literal)
- Titolo
- Malayaite Ceramic Pigments: a Combined Optical Spectroscopy and Neutron/X-ray Diffraction Study (literal)
- 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 Cr4+ and Cr3+ ions in the crystal lattice. Spectroscopy data confirm that Cr4+ is replacing Sn4+ in the octahedral site and, in minor amount, Si4+ in the tetrahedral site. In addition, neutron powder diffraction data suggest that Cr3+ substitution for octahedral Sn4+ is charge balanced by formation of oxygen vacancies with no preference over the different oxygen sites. Upon incorporation of Cr ion, the SnO6 octahedra exhibit an off-centre displacement of central cation which in turn induces a rearrangement of both the octahedral and tetrahedral coordination shells. (literal)
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