Synthesis and structural study of Rb2FeZr(PO4)3 phosphate with langbeinite structure |
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| Authors: | I. G. Trubach A. I. Beskrovnyi A. I. Orlova V. A. Orlova V. S. Kurazhkovskaya |
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| Affiliation: | (1) Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950, Russia;(2) Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia;(3) Moscow State University, Vorob’evy gory, Moscow, 119992, Russia |
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| Abstract: | A new orthophosphate of rubidium, iron, and zirconium, crystallizing in the langbeinite structure (cubic system, sp. gr. P213, Z = 4), was synthesized and investigated by X-ray powder diffraction and IR spectroscopy. The structure of the Rb2FeZr(PO4)3 phosphate was refined by the Rietveld method using the neutron powder diffraction data (DN-2 time-of-flight diffractometer; Joint Institute for Nuclear Research, Dubna). This structure is characterized by a mixed framework [FeZr(PO4)3] with Rb atoms located in large cavities. Fe3+ and Zr4+ cations are distributed statistically over two independent crystallographic positions. |
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