Summary
B-type carbonated hydroxyapatites, prepared in aqueous media free of alkali ions, fix ammonium ions present in the reaction medium. A small portion of the carbonate ions introduced into the apatite structure enter by the substitution mechanism (CO 2−3 , NH +4 )→(PO 3−4 , Ca2+). With these results for the structural incorporation of ammonium ions, differences in lattice parameters observed among specimens with the same degree of carbonation were attributed to some substitution of NH +4 for Ca2+. The fixed ammonium ions were shown to be the source of the cyanamide and cyanate ions that develop on heating. Above 500°C these apatites lost both the carbonate and the cyanate and cyanamide ions.
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References
Bonel G, Labarthe JC, Vignoles C (1973) Contribution a l'étude structurale des apatites carbonatées de type B, Colloques int. C.N.R.S. no 230. Physico-Chimie et Cristallographie des apatites d'intérêt biologique, 117–125
LeGeros RZ (1967) Crystallography studies of the carbonate substitution in the apatite structure. PhD Thesis, New York University.
Dowker SEP (1980) Infrared spectroscopic studies of thermally treated carbonate containing apatites. PhD Thesis, University of London
Doi Y, Moriwaki Y, Okazaki M, Takahashi J, Joshin K (1982) Carbonate apatites from aqueous and nonaqueous media studied by E. S. R., i.r. and x-ray diffraction: effect of NH +4 ions on crystallographic parameters. J Dent Res 61(2):429–434
Dowker SEP, Elliott JC (1979) Infrared absorption bands from NCO− and NCN2− in heated carbonate containing apatites prepared in the presence of NH +4 ions. Calcif Tissue Int 29: 177–178
Labarthe JC (1973) Contribution a l'étude de la structure et des propriétés des apatites carbonatées de type B phosphocalciques. Thèse de 3eme Cycle, Université Paul Sabatier, Toulouse, France
LeGros R, Godinot C, Torres L, Mathieu J, Bonel G (1982) Sur la stabilité thermique des carbonates du tissus, osseux. Jour Biol Bucale 10:3–9
Holcomb DW, Young RA (1984) Role of acid phosphate in hydroxyapatite lattice expansion. Calcif Tissue Int 36:60–63
Charlot G (1966) Les methodes de la chimie analytique; analyse quantitative et minérale, 5eme ed. Masson, Paris
Pinta M (1971) Spectrométrie d'absorption atomique, t. 1 et 2. Masson, Paris
Gee A, Deitz VR (1953) Determination of phosphate by differential spectrometry. Anal Chem 25: 1320–1324
Bonel G (1972) Contribution à l'étude de la carbonatation des apatites. Ann Chim 7:65–88 and 127–144
Holcomb DW, Young RA (1980) Thermal decomposition of human tooth enamel. Calcif Tissue Int 31:189–201
Dowker SEP, Elliott JC (1983) Infrared study of trapped carbon dioxide in thermally treated apatites J Solid State Chem 47:164–173
Dowker SEP, Elliott JC (1983) Infrared study of the formation, loss, and location of cyanate and cyanamide in thermally treated apatites. J Solid State Chem 49:334–340
Vignoles-Montrejaud M (1984) Contribution à l'étude des apatites carbonatées de type B. Thèse, Toulouse, France
Bernitt DL, Hartman KO, Hisatsune IC (1965) Infrared spectra of isotopic bicarbonate monomer ions. J Chem Phys 42: 3553–3558
American Cyanamid Company (1966) Cyanamide. American Cyanamid Company, Process Chemicals Department, Wayne, New Jersey
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Vignoles, M., Bonel, G. & Young, R.A. Occurrence of nitrogenous species in precipitated B-type carbonated hydroxyapatites. Calcif Tissue Int 40, 64–70 (1987). https://doi.org/10.1007/BF02555707
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DOI: https://doi.org/10.1007/BF02555707