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Title: On the existence of PbBi{sub 3}PO{sub 8}

The title compound crystallizes in the tetragonal system, a = 11.733(2) A, c = 15.587(3) A, I4 mm, Z = 10. Data were collected at the Argonne National Laboratory synchrotron source at {lambda} = 0.15359 A. Least squares refinement on F {sup 2} converged to R1 = 0.039. The oxygen coordination polyhedra around Bi and Pb display the distortions typical of 6s{sup 2} lone-pair atoms. One Bi is disordered. Bi-O bonds vary from 2.08(2) to 2.96(1) A. One Pb is in cubic coordination to oxygen and the second Pb is bonded to six oxygen atoms that form a rectangular pyramid and a seventh oxygen is off one of the rectangular faces of the pyramid. Pb-O bonds vary from 2.303(6) to 2.804(17) A. Of the two crystallographically independent P one is in a single tetrahedral coordination while the second is at the center of two disordered tetrahedra. Units of OM{sub 4} tetrahedra, M = Bi/Pb, articulate into a three-dimensional framework by corner and edge sharing that is strengthened by corner sharing with PO{sub 4} moieties.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Department of Chemical Engineering, Texas Materials Institute, University of Texas at Austin, 1 University Station C0400, Austin, TX 78712 (United States). E-mail: steinfink@che.utexas.edu
  2. Department of Chemical Engineering, Texas Materials Institute, University of Texas at Austin, 1 University Station C0400, Austin, TX 78712 (United States)
  3. Department of Chemistry, University of Texas at Austin, Austin, TX 78712 (United States)
  4. R.L. Harlow and Co., Inc., Silver Springs, MD 20906 (United States)
  5. XOR, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439 (United States)
Publication Date:
OSTI Identifier:
20891576
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 40; Journal Issue: 8; Other Information: DOI: 10.1016/j.materresbull.2005.03.031; PII: S0025-5408(05)00095-4; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH PHOSPHATES; CHEMICAL PREPARATION; CRYSTAL GROWTH; CRYSTAL STRUCTURE; LEAD PHOSPHATES; LEAST SQUARE FIT; OXIDES; OXYGEN; SYNCHROTRON RADIATION SOURCES; X-RAY DIFFRACTION