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Artículo

Synthetic hydroxyapatites doped with Zn(II) studied by X-ray diffraction, infrared, Raman and thermal analysis

Guerra López, José Rodolfo; Echeverría, Gustavo AlbertoIcon ; Guida, Jorge AlbertoIcon ; Viña, Raul OscarIcon ; Punte, Graciela MariaIcon
Fecha de publicación: 01/2015
Editorial: Pergamon-Elsevier Science Ltd
Revista: Journal of Physics and Chemistry of Solids
ISSN: 0022-3697
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Química Inorgánica y Nuclear; Física Atómica, Molecular y Química

Resumen

Calcium hydroxyapatite (CaHap) formation when different amounts of Zn(II) are present in the mother solution has been investigated by atomic absorption, infrared and Raman spectroscopies, X-ray diffraction and thermal analysis (DTA and TG). The studied samples have been synthesized at T=95°C and pH 9 in air. The analysis of the results have shown that the pure CaHap sample crystallizes in the monoclinic form P21/b. Concentrations up to 20% of Zn(II) in the mother solution, equivalent to smaller concentrations in solid (up to 9.1% in wt), favor the formation of the hexagonal apatite, P63/m, while Zn(II) concentrations higher than 20% in solution help an amorphous phase development where vibrational spectra indicated coexistence of two phases: an apatite and ZnNH4PO4·H2O. Infrared data of thermal treated samples endorse that HPO4 2 - ion had not been incorporated in Zn(II) doped samples during the synthesis process. Present results also allow to conclude that Zn(II) cation exhibits a preference to occupy the Ca2 site of the apatite structure and induces water adsorption and a small quantity of CO3 2- cation incorporation, leading to formation of a less crystalline Ca deficient apatite.
Palabras clave: HYDROXYAPATITE CATIONIC SUBSTITUTION , INFRARED AND RAMAN SPECTROSCOPIS , RIETVELD ANALYSIS , SECOND DERIVATIVE SPECTRA , THERMAL TREATMENT
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/180977
DOI: http://dx.doi.org/10.1016/j.jpcs.2015.01.017
Colecciones
Articulos(CEQUINOR)
Articulos de CENTRO DE QUIMICA INORGANICA "DR. PEDRO J. AYMONINO"
Articulos(IFLP)
Articulos de INST.DE FISICA LA PLATA
Citación
Guerra López, José Rodolfo; Echeverría, Gustavo Alberto; Guida, Jorge Alberto; Viña, Raul Oscar; Punte, Graciela Maria; Synthetic hydroxyapatites doped with Zn(II) studied by X-ray diffraction, infrared, Raman and thermal analysis; Pergamon-Elsevier Science Ltd; Journal of Physics and Chemistry of Solids; 81; 1-2015; 57-65
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