The Glaserite-like Structure of Double Sodium and Iron Phosphate Na3Fe(PO4)2

✍ Scribed by V.A. Morozov; B.I. Lazoryak; A.P. Malakho; K.V. Pokholok; S.N. Polyakov; T.P. Terekhina

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 424 KB
• Volume: 160
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2001.9250

✦ Synopsis

The double sodium and iron phosphate Na 3 Fe(PO 4 ) 2 was synthesized and studied by the XRD method, the second harmonic generation technique, and MoK ssbauer and IR spectroscopy. The compound crystallizes into a monoclinic system (space group C2/c) with unit cell parameters a ‫؍‬ 9.0736(2) A > , b ‫؍‬ 5.0344(1) A > , c ‫؍‬ 13.8732(3) A > , ‫؍‬ 91.435(2)3 and is found to be related to the K 3 Na(SO 4 ) 2 structure type. The crystal structure was determined by Rietveld analysis (R wp ‫؍‬ 5.86, R I ‫؍‬ 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. MoK ssbauer spectroscopy shows the presence of highspin Fe 3؉ in octahedral coordination.