Mössbauer investigation of the thermal phase transition in RbMnFe(CN)6

One of the Prussian blue analogs, RbMnFe(CN)6, was investigated by Mössbauer spectroscopy in the cooling and warming processes. The thermal phase transition was testified by Mössbauer studies. The high-temperature (HT) phase and low-temperature (LT) phase could be respectively determined to be Mn2+(S = 5/2)-NC-Fe3+(S = 1/2) and Mn3+(S = 2)-NC-Fe2+(S = 0).