Determining metal ion distributions using resonant scattering at very high-energy K-edges: Bi/Pb in Pb5Bi6Se14

Yuegang Zhang, Angus P. Wilkinson, Peter L. Lee, Sarvjit D. Shastri, Deming Shu, Duck Young Chung, Mercouri G. Kanatzidis

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Powder diffraction data collected at ∼86 keV, and just below both the Pb and the Bi K-edges, on an imaging plate detector using synchrotron radiation from the Advanced Photon Source have been used to examine the Pb/Bi distribution over the 11 crystallographically distinct sites in Pb 5Bi6Se14 [space group P21/m, a = 16.0096 (2) Å, b = 4.20148 (4) Å, c = 21.5689 (3) Å and β= 97.537 (1)°]. The scattering factors needed for the analyses were determined both by Kramers-Kronig transformation of absorption spectra and by analyses of diffraction patterns from reference compounds. Even with the relatively low scattering contrast that is available at the K-edges, it was possible to determine the Pb/Bi distribution and probe the presence of cation site vacancies in the material. The current results indicate that resonant scattering measurements at high-energy K-edges are a viable, and perhaps preferable, route to site occupancies when absorption from the sample or sample environment/container is a major barrier to the acquisition of high-quality resonant scattering data at lower-energy edges.

Original languageEnglish
Pages (from-to)433-441
Number of pages9
JournalJournal of Applied Crystallography
Volume38
Issue number3
DOIs
Publication statusPublished - Jun 2005

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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