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Figure 3
XANES spectra of reference compounds. Absorption spectra were obtained for biological cartilage samples previously characterized by FT-IR. Red solid line, carbapatite; red dotted line, amorphous carbonated Ca2+ apatite; black solid line, Ca2+ pyrophosphate dehydrate; blue solid line, non-diffusible tissue Ca2+. Note the pre-peak A (1s → 3d transition), the shoulder B (transition 1s → 4s), the double peaks C1–C2 [1s → 4p transition, whose relative intensities depend on the type of Ca2+, namely, Ca(I) or Ca(II) involved in apatite] and the single C peak for non-diffusible tissue Ca2+.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 18| Part 3| April 2011| Pages 475-480
doi:10.1107/S0909049511006984
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