The crystal structure of lead hydroxyapatite, Pb-10(PO4)(6)(OH)(2), is refined on powder XRD data using the Rietveld method. The unit cell is hexagonal, a=b=9.866(3) and c=7.426(2) Angstrom, space group P6(3)/m, Z=1 (relative to the specified formula). Results are discussed and compared with previous structures of hydroxyapatite and partially lead-substituted hydroxyapatites. Now that the entire range of lead substitution is covered, it is possible to detect a coherent trend in the distortions of the crystal packing introduced by the different ability of the two metallic crystal sites to accommodate Pb ions.

Crystal structure of lead hydroxyapatite from powder X-ray diffraction data / Brückner, S.; Lusvardi, Gigliola; Menabue, Ledi; Saladini, Monica. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - ELETTRONICO. - 236:1-2(1995), pp. 209-212. [10.1016/0020-1693(95)04636-N]

Crystal structure of lead hydroxyapatite from powder X-ray diffraction data

LUSVARDI, Gigliola;MENABUE, Ledi;SALADINI, Monica
1995-01-01

Abstract

The crystal structure of lead hydroxyapatite, Pb-10(PO4)(6)(OH)(2), is refined on powder XRD data using the Rietveld method. The unit cell is hexagonal, a=b=9.866(3) and c=7.426(2) Angstrom, space group P6(3)/m, Z=1 (relative to the specified formula). Results are discussed and compared with previous structures of hydroxyapatite and partially lead-substituted hydroxyapatites. Now that the entire range of lead substitution is covered, it is possible to detect a coherent trend in the distortions of the crystal packing introduced by the different ability of the two metallic crystal sites to accommodate Pb ions.
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Crystal structure of lead hydroxyapatite from powder X-ray diffraction data / Brückner, S.; Lusvardi, Gigliola; Menabue, Ledi; Saladini, Monica. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - ELETTRONICO. - 236:1-2(1995), pp. 209-212. [10.1016/0020-1693(95)04636-N]
Brückner, S.; Lusvardi, Gigliola; Menabue, Ledi; Saladini, Monica
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