An FTIR study of carbonate in synthetic apatites

F. Apfelbaum, H. Diab, I. Mayer*, J. D.B. Featherstone

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations


Synthetic carbonate apatites were prepared by precipitation at either pH 7, pH 9, or with controlled pH fluctuating between 5 and 9. Fourier transform infrared (FTIR) absorption spectra of the compounds were studied. Results showed that the amount of carbonate present during precipitation and pH are the determining factors in the formation of A- or B-type carbonates. At high pH or at low pH and high carbonate content, B-type apatites were obtained and at lower pH and smaller carbonate content, A + B-type apatites were obtained. For low cabonate samples an 866 cm-1 IR band was observed. Analysis of this band led to the assignment of this band primarily to HPO4= for samples prepared under the conditions of the present study.

Original languageAmerican English
Pages (from-to)277-282
Number of pages6
JournalJournal of Inorganic Biochemistry
Issue number4
StatePublished - Mar 1992

Bibliographical note

Funding Information:
This work was supported by U.S.-Israel Binatonial ScienceF oundation, Grant No. 86-00188T. he authors wish to thank A. Givan for help and fruitful d&ussions during FTIR analysis.


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