IR-spectra of fluorapatite and fluorchlorapatite

Extraction and characterisation of apatite- and tricalcium phosphate-based materials from cod fish bones

“…3(d); it shows good agreement with what is described in the literature [32]. The peak at 744 cm −1 does not appear in any other spectra; a peak for a comparable wavenumber (740 cm −1 ) was previously reported for pure FAp, and it was assigned to an OH-F stretching mode [9].…”

“…Fig. 3(c) shows the IR spectrum for sample CaCl8; the pattern is characteristic of ClAp, as reported in literature [32], with the general shape of the spectrum different to that of HAp. Furthermore, the peaks at 3570 and 633 cm −1 , associated with the \OH bond, are not present anymore, as this functional group was replaced by chlorine.…”

On the influence of etch pits in the overall dissolution rate of apatite basal sections

“…In infrared spectra, there are usually two bands associated with the phosphate modes. One spans between 800 and 1100 cm −1 mixing the symmetric and antisymmetric stretching, and another between 570 and 640 cm −1 for the antisymmetric bending (Baddiel and Berry 1966;Bhatnagar 1966;Kravitz et al 1968;Adams and Gardner 1974;Leroy et al 2000). For Raman spectroscopy, 7-12 peaks in the range 400-1200 cm −1 are observed, depending on the experimental conditions (Kravitz et al 1968;Adams and Gardner 1974;O'Shea et al 1974;Penel et al 1997;Leroy et al 2000;Comodi et al 2001;Liu et al 2008;Weikusat et al 2011).…”

Fluoride‐Based Bioceramics

“…Many vibrational spectroscopic investigations (FTIR and Raman) concerning FA have been repo rted, in par ticular, in the early works of Baddie l and Berry [15] , Bhatn agar [16] , Levitt et al [17] and Klee [18] . Some studi es also relate, amo ng others , to the far-infrar ed region [19] and to the influenc e of high-pres sure con ditions [20] .…”