Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1516408 | Journal of Physics and Chemistry of Solids | 2013 | 6 Pages |
The mixed cation diphosphates of composition MIFeIIIP2O7 have been prepared using the so called co-precipitation method starting with Fe(III) and M(I) nitrate solutions and solid (NH4)H2PO4, and characterized by X-ray powder diffractometry. The infrared and Raman spectra of the compounds were recorded and the results are briefly discussed on the basis of their structural peculiarities. The 57Fe-Mössbauer spectra show that the typical high-spin FeIIIO6 octahedra existent in these compounds exhibit almost no distortion. However, the hyperfine parameters are sensitive to some characteristics of the MI cations and to the different structural types.
► Diphosphates of composition MIFeIIIP2O7 were prepared by the co-precipitation method. ► IR and Raman spectra could be interpreted on the basis of the known structures. ► Small structural differences between these compounds were spectroscopically detected. ► 57Fe-Mössbauer spectra show that the FeIIIO6 octahedra are only weakly distorted.