CENTRO DE QUIMICA INORGANICA "DR. PEDRO J. AYMONINO"
Unidad Ejecutora - UE
Spectroscopic characterization of mixed cation diphosphates of the type MIFeIIIP2O7 (with MI = Li, Na, K, Rb, Cs, Ag)
B. S. PARAJÓN-COSTA; R. C. MERCADER; E. J. BARAN
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
PERGAMON-ELSEVIER SCIENCE LTD
Lugar: Amsterdam; Año: 2013 vol. 74 p. 354 - 354
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.