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Burnell, Victoria A., Readman, Jennifer E. 
ORCID: 0000-0002-8170-5533, Tang, Chiu C., Parker, Julia E., Thompson, Stephen P. and Hriljac, Joseph A.
(2010)
Synthesis and structural characterisation using Rietveld and pair distribution function analysis of layered mixed titanium–zirconium phosphates.
Journal of Solid State Chemistry, 183
(9).
pp. 2196-2204.
ISSN 00224596
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Official URL: http://dx.doi.org/10.1016/j.jssc.2010.07.028
Abstract
Crystalline metal (IV) phosphates with variable zirconium-to-titanium molar ratios of general formula (Ti1−xZrx)(HPO4)2·H2O have been prepared by precipitation of soluble salts of the metals with phosphoric acid and heating the amorphous solids in 12 M H3PO4 in an autoclave. The new materials are structurally characterised by Rietveld analysis of synchrotron X-ray powder diffraction data and pair distribution function (PDF) analysis of high energy synchrotron X-ray total scattering data. A broad range of zirconium–titanium phosphate solid solutions were formed showing isomorphous substitution of titanium by zirconium in the α-titanium phosphate lattice and vice versa for titanium substitution into the α-zirconium phosphate lattice. In both cases the solubility is partial with the coexistence of two substituted phases observed in samples with nominal compositions between the solubility limits.
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