X-Ray absorption spectroscopy investigations combined with ab initio structural simulations of ternary forms (Pb–Sb–Zn and Pb–Sb–Fe) of the pigment Naples yellow (Pb2Sb2O7) allowed to achieve a detailed insight into the incorporation route of Zn and Fe ions inside the pigment lattice. The study of newly synthesised yellow pyroantimonates provided direct evidence that Zn and Fe ions enter the pyrochlore octahedral sites replacing Sb ions. Experimental results were discussed considering, also, the information provided by Raman spectroscopy used in this study as a sensitive probe of the pyrochlore lattice distortions in modified yellow pyroantimonates. Finally, by exploiting the non-invasiveness of the X-ray absorption spectroscopy technique, the same structural arrangement has been unambiguously observed for Zn cations in a modified Naples yellow pigment of a Renaissance ceramic shard.

Modified Naples yellow in Renaissance majolica:study of Pb-Sb-Zn and Pb-Sb-Fe ternary pyroantimonates by X-ray absorption spectroscopy

BRUNETTI, Brunetto Giovanni;
2011

Abstract

X-Ray absorption spectroscopy investigations combined with ab initio structural simulations of ternary forms (Pb–Sb–Zn and Pb–Sb–Fe) of the pigment Naples yellow (Pb2Sb2O7) allowed to achieve a detailed insight into the incorporation route of Zn and Fe ions inside the pigment lattice. The study of newly synthesised yellow pyroantimonates provided direct evidence that Zn and Fe ions enter the pyrochlore octahedral sites replacing Sb ions. Experimental results were discussed considering, also, the information provided by Raman spectroscopy used in this study as a sensitive probe of the pyrochlore lattice distortions in modified yellow pyroantimonates. Finally, by exploiting the non-invasiveness of the X-ray absorption spectroscopy technique, the same structural arrangement has been unambiguously observed for Zn cations in a modified Naples yellow pigment of a Renaissance ceramic shard.
2011
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11391/920370
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact