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Crystal structures and reference X-ray powder diffraction patterns of Sr4−xCaxPb2O8 (x=1,2,3)

Published online by Cambridge University Press:  10 January 2013

W. Wong-Ng ,
J. A. Kaduk  and
W. Greenwood
W. Wong-Ng
Affiliation:
Ceramics Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
J. A. Kaduk
Affiliation:
Amoco Corporation, Naperville, Illinois 60566
W. Greenwood
Affiliation:
Geology Department, University of Maryland, College Park, Maryland 20742
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Abstract

The crystal structure of the solid solution alkaline earth plumbate phase Sr4−xCaxPb2O8 was investigated using the X-ray Rietveld technique for x=1, 2, and 3. The lattice parameters a, b, c, and V were found to decrease linearly as the Sr at site 4h was replaced by Ca. The structure features chains of edge-sharing PbO6 octahedra, linked by seven-coordinated (Ca/Sr)–O monocapped trigonal prisms. The structure is similar to that of Pb3O4, which can be reformulated as Pb2IIPbIVO4. X-ray diffraction patterns for the solid solution members SrCa3Pb2O8, Sr2Ca2Pb2O8, and Sr3CaPb2O8 were prepared for inclusion in the Powder Diffraction File.

Type
Research Article
Information
Powder Diffraction , Volume 13 , Issue 4 , December 1998 , pp. 232 - 240
Copyright
Copyright © Cambridge University Press 1998

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