Assertion: nanocrystalline apatite | /r/CapableOf | exhibit supplementary bands
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text: However, in addition to the “regular” apatite spectral features observed in HA, nanocrystalline apatites also exhibit supplementary bands which are due to the presence of nonapatitic ionic environments within a surface layer on the nanocrystals, as mentioned in the introduction section; bands due to nonapatitic (labile) and as well as ions have in particular been identified [7, 13, 46, 47, 49–52], and spectral decompositions are then needed to explore in further details each vibrational contribution (see e.g., ).