Yellow pyroantimonates Pb-Sb, Pb-Sb-Sn and Pb-Sb-Zn were synthesized by solid-state reactions at high temperature and characterized by X-ray diffraction and Raman spectroscopy. The lattice size of cubic pyrochlores increases with Sri and Zn doping and with Pb overstoichiometry, indicating the replacement of Sb(5+) by the larger cations. This fact permits the understanding of the corresponding Raman spectral modifications as a consequence of the changes in the local symmetry of the Sb-O polyhedra, justifying the exploitation of Raman spectroscopy to noninvasively identify structural modifications of pyroantimonate pigments in artworks.
Raman scattering features of lead pyroantimonate compounds. Part I: XRD and Raman characterization of Pb(2)Sb(2)O(7) doped with tin and zinc
Rosi F;Miliani C;
2009
Abstract
Yellow pyroantimonates Pb-Sb, Pb-Sb-Sn and Pb-Sb-Zn were synthesized by solid-state reactions at high temperature and characterized by X-ray diffraction and Raman spectroscopy. The lattice size of cubic pyrochlores increases with Sri and Zn doping and with Pb overstoichiometry, indicating the replacement of Sb(5+) by the larger cations. This fact permits the understanding of the corresponding Raman spectral modifications as a consequence of the changes in the local symmetry of the Sb-O polyhedra, justifying the exploitation of Raman spectroscopy to noninvasively identify structural modifications of pyroantimonate pigments in artworks.File | Dimensione | Formato | |
---|---|---|---|
prod_183302-doc_27085.pdf
accesso aperto
Descrizione: 2009_JRS_yellow_1
Dimensione
178.42 kB
Formato
Adobe PDF
|
178.42 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.