Substitutions of Praseodymium and Silicon for Calcium
and Phosphorus in Hydroxyapatite Structure

N. V. Starostenko, E. I. Get’man, S. N. Loboda, L. V. Pasechnik, and V. I. Marchenko^†

Donetsk National University, Donetsk, Ukraine

Received March 22, 2011

Abstract—Substituted hydroxyapatite samples of composition Ca_{10 – x}Pr_x(PO₄)_{6 – x}(SiO₄)_x(OH)₂, where x= 0–
6, were studied using X-ray diffraction and IR spectroscopy. Calcium substitutions occurred over the entire
range of compositions studied. The crystal structure of solid solutions was refined by the Rietveld technique.

DOI: 10.1134/S0036023612090197

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