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Fig. 7. Mössbauer spectra of 1a and 4a.
1a {Fe(CH3-pbpy+)2[Ni(CN)4]2·2H2O} a at 80 K and b at 323 K, in comparison to spectra of 4a {Fe(NO2-pbpy+)2[Ni(CN)4]2·2H2O} c at 80 K and d at 295 K.