@article{ajmse2017511,
author={{Yacoubi, A. El and Massit, A. and Moutaoikel, S. El and Rezzouk, A. and Idrissi, B. Chafik El},
title={Rietveld Refinement of the Crystal Structure of Hydroxyapatite Using X-ray Powder Diffraction},
journal={American Journal of Materials Science and Engineering},
volume={5},
number={1},
pages={1--5},
year={2017},
url={http://pubs.sciepub.com/ajmse/5/1/1},
issn={2333-4673},
abstract={The stoichiometric hydroxyapatite, Ca<SUB>10</SUB>(PO<SUB>4</SUB>)<SUB>6</SUB>(OH)<SUB>2</SUB> is prepared by an aqueous precipitation method at room temperature, the main reactants were Ca(OH)<SUB>2</SUB> and H<SUB>3</SUB>PO<SUB>4</SUB> without addition of ammonia solution. The sample was analyzed by Fourier transformed infrared spectroscopy (FTIR) which reveals the presence of a small amount of carbonate due to absorbance of carbon dioxide from the air during synthesis process. The crystal structure was carried out by X-ray powder diffraction data and the Rietveld method using FullPROF software. We confirmed that this material has a hexagonal structure (space group P63/m; Z = 1). Unit-cell parameters with higher precision (a = b = 9.4159(4) ? , c = 6.8819(3) ?, ¦Á = ¦Â = 90¡ã; and ¦Ã = 120¡ã).},
doi={10.12691/ajmse-5-1-1}
publisher={Science and Education Publishing}
}