The linkage isomerism in several transition metal hexacyanometallates
was studied by Mossbauer, IR and XRD techniques. Ferrous chromicyanide
and manganicyanide transform into Cr3+ ferrocyanide and Mn2+ ferrocya
nide, respectively, through an unstable intermediate ferric salt produ
ced by the mean of an electron transfer which reduces the inner cation
to Cr(II) and Mn(II).