New phosphate Fe0.5Nb1.5(PO4)3 with an electrically neutral framework. Synthesis and crystal structure |
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| Authors: | I G Trubach A I Orlova A I Beskrovnyi A K Koryttseva M V Zharinova V S Kurazhkovskaya E V Lipatova |
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| Institution: | (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, 119899, Russia |
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| Abstract: | A new iron-niobium phosphate, Fe0.5Nb1.5(PO4)3, has been prepared and studied by X-ray diffraction, electron microprobe analysis, IR spectroscopy, and neutron powder diffraction. On the basis of X-ray powder data, it was found that the synthesized phosphate crystallizes into the sp. gr. R $\bar 3$ c and corresponds to the structural type of sodium-zirconium phosphate NaZr2(PO4)3. The structure was refined by the Rietveld method based on a powder neutron diffraction experiment. The obtained phosphate belongs to complex niobium orthophosphates and has a framework structure with a zero framework charge. |
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