dc.creator Levitt, Stephen R. en_US dc.creator Condrate, Robert A. en_US dc.date.accessioned 2006-06-15T16:45:30Z dc.date.available 2006-06-15T16:45:30Z dc.date.issued 1968 en_US dc.identifier 1968-L-10 en_US dc.identifier.uri http://hdl.handle.net/1811/15509 dc.description Author Institution: Department of Ceramic Science, College of Ceramics, State University of New York en_US dc.description.abstract The infrared $(4000-33 cm^{-1})$ and laser Raman spectra have been obtained for the following apatites: fluorapatite $Ca_{10}(PO_{4})_{6}F_{2}$, chlorapatite $Ca_{10}(PO_{4})_{6})Cl_{2}$, hydroxyapatite $Ca_{10}(PO_{4})_{6})(OH)_{2}$, pyromorphite $Pb_{10}(PO_{4})_{6}Cl_{2}$, mimetite $Pb_{10}(AsO_{4})_{6}Cl_{2}$ and vanadinite $Pb_{10}(VO_{4})_{6}Cl_{2}$. Simple site group theory, which has been used by earlier workers investigating the infrared spectra of these solids, does not satisfactorily explain the differences observed between infrared and Raman spectra. However, factor group analysis based upon six distorted tetrahedral groups per unit cell will account for these variations. The comparison of the infrared and Raman spectra has also led to the reassignment of the $\sigma_{2}$-modes to higher frequencies. These results are consistent with those predicted by normal coordinate analysis using a Urey-Bradley force field. en_US dc.format.extent 129605 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title THE INFRARED AND LASER RAMAN SPECTRA OF SEVERAL APATITIES en_US dc.type article en_US
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