SSNMR confirms silicate ion substitution in the apatitic structure of 0.8wt% Si hydroxyapatite by Marc-Krystelle Mafina, Rory M. Wilson, Gregory J. Rees, Peter Gierth, Alice C. Sullivan, Karin A. Hing

“…It has been hypothesized that silicon is present in the form of silicate groups site-specifically substituted in the hydroxyapatite lattice for phosphate groups, or that there may be an amorphous silicon-rich phase in the vicinity of the grain boundaries. Solid-state nuclear magnetic resonance (SSNMR) spectroscopy was carried out to view the elemental interactions using phosphorus (31P) and silicon (29Si) probes to confirm or refute the presence of silicate groups in relation to phosphate groups in the bulk material structure. …”
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