Vibrational Spectra of Hydrothermally Prepared Hydroxyapatites |
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Authors: | K. C. BLAKESLEE ROBERT A. CONDRATE SR. |
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Affiliation: | Department of Ceramic Science, State University of New York, College of Ceramics at Alfred University, Alfred, New York 14802 |
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Abstract: | Apatites can be used as bioceramic materials for tooth and bone implants. Infrared (4000 to 400 cm−1) and laser-Raman spectra were obtained for hydrothermally prepared hydroxyapatites with the general formula X10(PO4)6(OH)2 where X= Ca2+ Sr2+, Ba2+, or Pb2+ Fundamental vibrational modes were identified and empirical band assignments made. Analysis of the vibrational spectra led to the reassignment of the v2 mode to a higher wave-number, lower-intensity band (e.g. ∼470 cm−1 for Ca hydroxyapatite). Effects of solid-state interaction were noted in the vibrational spectra and interpreted by factor-group analysis. An "effective" factor group C6h, which neglects the locations of the OH− ions, best describes the vibrational spectra of the hydroxyapatites. |
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