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The infrared spectra of a series of cadmium substituted calcium hydroxylapatites of the type Ca 10-x Cd x (PO 4 ) 6 (OH) 2 , were investigated in order to obtain insight on the effect of the Cd(II) ion on the vibrational properties of the PO 4  3-  and OH -  groups. The effect of the substitutional process on the strength of the P–O bonds was also checked by Raman Spectroscopy and an analysis of the behaviour of the deuterated Ca 5 Cd 5 (PO 4 ) 6 (OD) 2  phase was undertaken. The strength of the P–O bonds shows a linear dependence on the Cd(II) content, whereas the OH-vibrational modes present a more complex behaviour.

zeitschrift für naturforschung b

Schwingungsspektroskopische Untersuchung einiger gemischter Calcium/Cadmium-Hydroxylapatite / Vibrational-Spectroscopic Investigation on Some Mixed Calcium/Cadmium-Hydroxylapatites