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Neutron diffraction and X-ray absorption study of Ag5Pb2O6

✍ Scribed by K. Yoshii; M. Mizumaki; K. Kato; T. Uruga; H. Abe; A. Nakamura; Y. Shimojo; Y. Ishii; Y. Morii

Publisher: Elsevier Science
Year: 2007
Tongue: English
Weight: 243 KB
Volume: 180
Category: Article
ISSN: 0022-4596
DOI: 10.1016/j.jssc.2006.10.025

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✦ Synopsis

Neutron diffraction and X-ray absorption measurements were carried out for a silver-lead oxide Ag 5 Pb 2 O 6 . The powder neutron diffraction patterns could be fitted to the trigonal P 31m structure, as was found by X-ray diffraction. From the bond-valence-sum (BVS) analysis, the valences of the Ag and Pb ions were estimated to be about 1+ and 3.7+, respectively. The X-ray absorption measurements indicated that the ionic state of Ag is close to 1+, while that of Pb stands between 3+ and 4+. The deviation of the valence of the Pb ion from 4+ suggests a contribution of Pb orbitals to the metallic conduction as well as the possible superconductivity of this material, consistently with a recent band-structure calculation.

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