Emission Mössbauer spectroscopy in <SUP>57</SUP>Co doped metal acetylacetonates of Al(III), Cr(III), Mn(III), Fe(III) and Co(III)

Metal acetylacetonates of Al(III), Cr(III), Mn(III), Fe(III) and Co(III) were doped with high specific activity carrier free <SUP>57</SUP>Co<SUP>2+</SUP> and their emission Mössbauer spectra taken against enriched Na<SUB>4</SUB>Fe(CN)<SUB>6</SUB>. In the case of Al(III), Cr(III) and Co(III) complexes a simple quadrupole split pattern is obtained, while with Mn(III) and Fe(III) acetylacetonates the spectra corresponds to that of <SUP>57</SUP>Co(AcAc)<SUB>3</SUB>. These results have been discussed