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Layered mixed tin-titanium phosphates

Published online by Cambridge University Press:  31 January 2011

Camino Trobajo
Affiliation:
Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, 33071 Oviedo, Spain
Maria L. Rodríguez
Affiliation:
Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, 33071 Oviedo, Spain
Marta Suárez
Affiliation:
Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, 33071 Oviedo, Spain
José R. García*
Affiliation:
Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, 33071 Oviedo, Spain
Julio Rodríguez
Affiliation:
Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, 33071 Oviedo, Spain
José B. Parra
Affiliation:
Instituto Nacional del Carbón, C.S.I.C. Apartado 73, 33080 Oviedo, Spain
Miguel A. Salvadó
Affiliation:
Departamento de Química Física y Analítica, Universidad de Oviedo, 33071 Oviedo, Spain
Pilar Pertierra
Affiliation:
Departamento de Química Física y Analítica, Universidad de Oviedo, 33071 Oviedo, Spain
Santiago García-Granda
Affiliation:
Departamento de Química Física y Analítica, Universidad de Oviedo, 33071 Oviedo, Spain
*
a) Author to whom correspondence should be addressed.
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Abstract

Mixed crystalline tin-titanium phosphates with variable tin-to-titanium molar ratio have been prepared by precipitation of soluble salts of the metal (IV) with phosphoric acid and refluxing the amorphous solids in 17 M H3PO4. The new materials are characterized by chemical textural and thermal analysis and x-ray powder diffraction. The tin-titanium phosphates are solid solutions showing an isomorphic substitution of tin by titanium in the α-tin phosphate lattice and tin substitution in the γ-titanium phosphate lattice. In both cases, the solubility is partial. The coexistence of both saturated phases is observed in samples of composition between the solubility limits.

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Copyright
Copyright © Materials Research Society 1998

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