A new structural model for Pb-deficient PbWO4

Authors
Moreau, JM Gladyshevskii, RE Galez, P Peigneux, JP Korzhik, MV
Citation
Jm. Moreau et al., A new structural model for Pb-deficient PbWO4, J ALLOY COM, 284(1-2), 1999, pp. 104-107
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF ALLOYS AND COMPOUNDS
ISSN journal
09258388 → ACNP
Volume
284
Issue
1-2
Year of publication
1999
Pages
104 - 107
Database
ISI
SICI code
0925-8388(19990304)284:1-2<104:ANSMFP>2.0.ZU;2-F
Abstract
A previously reported structure proposal for Pb-deficient PbWO4 (Pb7W8O32-x , space group P4/nnc) could be rejected based on neutron powder diffraction data. A new model in agreement with X-ray and neutron diffraction data is proposed (tetragonal, tP48, space group P-4-h(10)g(2)dcba, a=7.7208(1), c=1 2.0417(2) Angstrom). It is a superstructure of the scheelite type with part ial vacancies on a one-fold lead site, leading to the composition Pb7.5W8O3 2. (C) 1999 Elsevier Science S.A. All rights reserved.