Summary
It is shown how certain aspects of the composition and structure of carbonated apatites depend strictly on preparation conditions, for example, excess of phosphate or calcium ions in the reaction medium, CO3 2− concentration, pH, ammonia added or not. Depending on those conditions, either one or the other of the two proposed mechanisms of introduction of carbonate ions into the B sites is dominant. The mechanisms are (1) replacement of a phosphate ion by a carbonate ion with the formation of three vacancies, one in a phosphate oxygen site and one each in the neigh-boring Ca2+ and OH− sites; and (2) replacement of a phosphate ion by a carbonate accompanied by a hydroxyl ion. Whether mechanism (1) is observed to dominate over mechanism (2), or vice versa, is accounted for by the relative concentrations of the various ions in the reaction medium. The number of vacancies is decreased by the presence of either, or both, excess calcium ions or ammonia in the reaction medium. A structural-chemical mechanism is advanced for the view that, with the smallest CO3 2− content, the A sites are favored but with increasing carbonate content the B sites become favored and the A-site content becomes less than it is when the total carbonate content is less.
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Elliott JC (1961) The infrared spectrum of the carbonate ion in carbonate-containing apatites (abstract) J Dent Res 40:1284
Emerson WH, Fischer EE (1962) The infrared absorption spectra of carbonate in calcified tissues. Archs Oral Biol 7:671–683
Bonel G (1972) Contribution a l'étude de la carbonation des apatites. Part I. Ann Chim 7:65–87
Bonel G (1972) Contribution a l'étude de la carbonation des apaties. Parts II and III. Ann Chim 7:127–144
Legeros RZ, Trautz OR, Legeros JP, Klein E (March 1970) Paper 177 at 48th General IADR Meeting. New York, pp 16–19
Hallsworth AS, Weatherell JA, Robinson C (1973) Loss of carbonate during the first stages of enamel carries. Caries Res 7:345
Ingram GS (1973) The role of carbonate in dental mineral. Caries Res 7:127
Sobel AE (1960) Interrelationship of tooth composition, body fluids, diet and caries susceptibility, Ann NY Acad Sci 85:96
Elliott JC, Holcomb DW, Young RA (1985) Infrared determination of the degree of substitution of hydroxyl by carbonate ions in human dental enamel. Calcif Tissue Int 37:372–375
Holcomb DW, Young RA (1980) Thermal decomposition of human tooth enamel. Calcif Tissue Int 31:189–201
Bonel G, Montel G (1965) Etude comparée des apatites carbonatées obtenues par differentes methodes de synthèse. Reactivity of Solids 5th Intl Symp, Munich 1964 Elsevier Publishing Co, Amsterdam
Elliott JC (1963) On the interpretation of the carbonate bands in the infra-red spectrum of dental enamel. J Dent Res 42:1081
Dowker SEP, Elliott JC (1979) Infra-red absorption bands from NCO− and NCN2− in heated carbonate-containing apatites prepared in the presence of NH4 + ions. Calcif Tissue Int 29:177–178
Legeros RZ (1967) Crystallography studies of the carbonate substitution in the apatite structure. PhD Thesis, New York University
Bonel G, Labarthe JC, Vignoles C (1973) Contribution a l'étude structurale des apatites carbonatées de type B. Colloques int. CNRF no 230. Physico-Chimie et Cristallographie des apatites d'interet biologique, pp 117–125
Dowker SEP (1980) Infrared spectroscopic studies of thermally treated carbonate containing apatites. PhD Thesis, University of London
Vignoles-Montrejaud M (1984) Contribution a l'étude des apatites carbonatées de type B. Thèse L'Institut National Polytechnique de Toulouse, France
Bacquet G, Vo Guang Truong, Vignoles M, Bonel G (1981) ESR of the F+ centre in B type carbonated hydroxyapatite. Phys Stat Sol (a) 68:K71-K74
Curzon MEJ, Cutress TW (1983b) Trace elements and dental disease. Postgraduate Dental Handbook Series, vol 9. John Wright PSC Inc
Bacquet G, Vo Quang Truong, Vignoles M, Bonel G (1981) EPR detection of acetate ions trapping in B-type carbonated fluorapatites. Solid State Chemistry 39:148–153
Vignoles M, Bonel G, Young RA (1986) Occurrence of nitrogenous species in precipitated B-type carbonated hydroxyapatites. Calcif Tissue Int 40:64–70
Elliott JC (1964) The crystallographic structure of dental enamel and related apatites. PhD Thesis, University of London
LeGeros RZ, Trautz OR, LeGeros JP, Klein E (1968) Carbonate substitution in the apatite structure. Bull Soc Chim France (no special):1712–1718
Bacquet G, Vo Quang Truong, Bonel G, Vignoles M (1980) Resonance paramagnetique électronique du centre F+ dans les fluorapatites carbonatées de type B. Solid State Chemistry 33:189–195
Elliott JC, Mackie PE (1975) Monoclinic hydroxyapatite. Colloques internationaux CNRS No 130, Physico-Chimie et cristallographie des apatites d'interet biologique 71:69–76
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Vignoles, M., Bonel, G., Holcomb, D.W. et al. Influence of preparation conditions on the composition of type B carbonated hydroxyapatite and on the localization of the carbonate ions. Calcif Tissue Int 43, 33–40 (1988). https://doi.org/10.1007/BF02555165
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DOI: https://doi.org/10.1007/BF02555165