Molecular and Crystal Structure Characterization of Calcium-Deficient Apatite

Abstract:

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Calcium-deficient hydroxylapatite (CDHA) powders with Ca/P ratios from1.5 to 1.67 were synthesized by wet-chemical method. Rietveld structure refinement was performed on the X-ray diffraction data and Fourier transform infrared spectroscopy was used to characterize molecular and crystal structure of CDHA. With the decrease of Ca/P ratio, the crystallite size and crystallinity decreased, but the acid phosphate content and amount of vacancies in hydroxyapatite hexagonal structure increased. The disorder of CDHA structure increase indicated calcium-deficiency and HPO4 replacement resulted in disorder of crystal in apatite structure. The more calcium is deficient, the more disorder or imperfect in CDHA structure

Info:

Periodical:

Key Engineering Materials (Volumes 330-332)

Main Theme:

Edited by:

Xingdong Zhang, Xudong Li, Hongsong Fan, Xuanyong Liu

Pages:

119-122

DOI:

10.4028/www.scientific.net/KEM.330-332.119

Citation:

H. H. Zhou et al., "Molecular and Crystal Structure Characterization of Calcium-Deficient Apatite", Key Engineering Materials, Vols. 330-332, pp. 119-122, 2007

Online since:

February 2007

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Price:

$35.00

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