2011
DOI: 10.1016/j.molstruc.2011.01.056
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Complementary information on water and hydroxyl groups in nanocrystalline carbonated hydroxyapatites from TGA, NMR and IR measurements

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Cited by 42 publications
(36 citation statements)
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“…Since high temperatures are attainable during milling, we suppose that the proton transfer mechanism was in operation for our samples. It was probably supported by physical diffusion of water molecules to fill voids in the c -axis channels (Kaflak and Kolodziejski 2008, 2011; Wilson et al 2006). …”
Section: Resultsmentioning
confidence: 99%
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“…Since high temperatures are attainable during milling, we suppose that the proton transfer mechanism was in operation for our samples. It was probably supported by physical diffusion of water molecules to fill voids in the c -axis channels (Kaflak and Kolodziejski 2008, 2011; Wilson et al 2006). …”
Section: Resultsmentioning
confidence: 99%
“…They can be coordinated to surface Ca 2+ -sites or can form hydrogen bonds with surface P–OH and P=O sites, and all of them can participate in hydrogen bonding with neighboring water molecules (Bertinetti et al 2007; Bolis et al 2012; Ishikawa et al 1989; Wilson et al 2006). The surface species are involved in a proton exchange via hydrogen bonds (Kaflak-Hachulska et al 2003; Kaflak and Kolodziejski 2007, 2011; Kolodziejski 2005), which process controls the shape and chemical shift of the proton line at 5.4 ppm.
Fig. 3The exemplary solid-state NMR spectra of the apatite powders, shown for HA24: ( a ) 1 H NMR under MAS at 12 kHz; ( b )–( g ) 31 P NMR spectra under MAS at 3.5 kHz.
…”
Section: Resultsmentioning
confidence: 99%
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“…The latter situation has been reported in the heating of some synthetic apatites and some actual bone (Holcomb and Young 1980;Mkukuma et al 2004;Zyman et al 2009). A proposed alternative mechanism for rehydroxylation of apatite (LeGeros et al 1978;Kaflak and Kolodziejski 2011), i.e., the reaction of 2(HPO 4 ) 2-+ (CO 3 ) 2-→ (P 2 O 7 ) 4-+ CO 2 + 2(OH) -, would not affect the amount of water detected by TGA.…”
Section: Possible Underestimation Of the Amount Of Water In Carbonatementioning
confidence: 99%
“…5 ppm and hydroxide ions at ca. 0 ppm [27]. In bone, however, proton signals from the collagen matrix overwhelm mineral signals [21].…”
Section: Introductionmentioning
confidence: 99%