Moessbauer Study of Pentavalent Iron Stabilized by Means of Oxide Matrices

Yu.D. Perfiliev

J.Radioanal. Nucl. Chem., Articles 2000 (in press)

ABSTRACT. Samples of K3MnO4, V2O5 and K2RuO4 containing a small quantity of 57Fe were prepared and the Moessbauer effect was measured at various temperatures. A single broadened line of the room temperature spectrum of K3MnO4 with a isomer shift of -0.292(1) mm/s with respect to sodium nitroprusside was ascribed to pentavalent iron ion in a tetrahedral site. A similar line ( d= -0,30(1) mm/s ) was observed in the spectrum of V2O5. Two distinct states of Fe5+, the lines of which have isomer shifts of -0.38(1) and -0,15(1) mm/s, were found to form in K2RuO4. They were not stable and disproportionated to the Fe6+ and Fe3+ states.

Coordination Chemistry Laboratory