The Glaserite-like Structure of Double Sodium and Iron Phosphate Na3Fe(PO4)2 |
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| Authors: | V A Morozov B I Lazoryak A P Malakho K V Pokholok S N Polyakov T P Terekhina |
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| Institution: | a Chemical Department, Moscow State University, 119899, Moscow, Russia;b Skobeltsin Institute of Nuclear Physic, Moscow State University, 119899, Moscow, Russia |
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| Abstract: | The double sodium and iron phosphate Na3Fe(PO4)2 was synthesized and studied by the XRD method, the second harmonic generation technique, and Mössbauer and IR spectroscopy. The compound crystallizes into a monoclinic system (space group C2/c) with unit cell parameters a=9.0736(2) Å, b=5.0344(1) Å, c=13.8732(3) Å, β=91.435(2)° and is found to be related to the K3Na(SO4)2 structure type. The crystal structure was determined by Rietveld analysis (Rwp=5.86, RI=2.03). Iron cations occupy the M (Na) position while sodium cations occupy the X (K) and Y (K) positions of the glaserite-like structure. Mössbauer spectroscopy shows the presence of high-spin Fe3+ in octahedral coordination. |
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| Keywords: | phosphates iron sodium X-ray diffraction rietveld IR spectroscopy Mö ssbauer spectroscopy |
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