The electronic states of Fe atoms in Co[Fe(CN)(5)NH3] . xH(2)O were studied
by means of Fe-57 Mossbauer spectroscopy. The Mossbauer spectra of Co[Fe(C
N)(5)NH3] . 6H(2)O show the coexistence of mixed valences for the Fe atoms
and a magnetic relaxation at 4 K. When water molecules were removed, electr
on transfer from Co to Fe occurred.