Infrared spectroscopY and the structure of La0.33Zr2(PO4)3-Yb0.33Zr2(PO4)3 solid solutions
E. Y. Borovikova, V. S. Kurazhkovskaya, D. M. Bykov, A. I. Orlova
Keywords: infrared spectroscopy, factor-group analysis of vibrations, rare earth orthophosphates, NASICON structural type
Pages: 46-50
Abstract
Solid solutions of double orthophosphates of zirconium and rare earth lanthanum and ytterbium (La0.33Zr2(PO4)3-Yb0.33Zr2(PO4)3) that belong to the NASICON (NZP) structural type are synthesized and studied by IR spectroscopy. The factor-group analysis of P-O vibrations in phosphates with (La0.33Zr2(PO4)3) and (Yb0.33Zr2(PO4)3) space groups allows us to assign the intermediate representatives of this series to two different space groups by their IR spectra, which is difficult to perform based on powder X-ray diffraction results. A morphotropic transition → с is found to occur near the La1/18Yb5/18Zr2(PO4)3 composition.
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