Crystal structure of the double magnesium zirconium orthophosphate at temperatures of 298 and 1023 K |
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Authors: | E R Gobechiya M V Sukhanov V I Pet’kov Yu K Kabalov |
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Institution: | (1) Lomonosov Moscow State University, Leninskie gory, Moscow, 119992, Russia;(2) Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950, Russia |
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Abstract: | Double magnesium zirconium orthophosphate Mg0.5Zr2(PO4)3 is synthesized by the sol-gel method. The compound prepared is characterized using electron probe microanalysis and X-ray diffraction. The crystal structure of the orthophosphate is refined by the Rietveld method in space group P21/n (Z = 4) at temperatures of 298 K a = 12.4218(2) Å, b = 8.9025(2) Å, c = 8.8218(2) Å, β = 90.466(1)°] and 1023 K a = 12.4273(5) Å, b = 8.9453(4) Å, c = 8.8405(4) Å, β = 90.320(3)°]. It is demonstrated that an increase in the temperature leads to an anisotropic expansion of the unit cell of the phosphate structure, but the structural type remains unchanged. |
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