A series of coordination polymers of the type KM[Fe(CN)6] (M=Mn, Fe, Co, Ni, Cu or Zn) have the face-centered cubic unit cell characteristic of Prussian blue analogs. The lattice parameter and magnetic susceptibility data have indicated that these compounds consist of carbon-coordinated low-spin Fe(III) ion and nitrogen-coordinated high-spin M(II) ion. The C≡N stretching, Fe-C stretching and Fe-CN bending frequencies are shifted to the higher frequency side compared with those of corresponding potassium hexacyanoferrates. This shift provides an evidence for the existence of the linkage structure Fe-C≡N-M. The conductivity-temperature curves have the characteristics of semiconductor in the range from room temperature to about 170℃. This property could be interpreted in terms of weak metal-metal interaction through the bridged cyanide group.