Goldanskii-Karyagin Effect Observed 50 Years Ago in Metal Dichlorides
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57 Fe Mӧssbauer measurement was done for MgCl 2 , MnCl 2 , FeCl 2 , CoCl 2 , NiCl 2 or CdCl 2 at temperatures 77 K, 201 K and R. T. and for cases of FeCl 2 , CoCl 2 and NiCl 2 more measurements were done at 473 K and 623 K. Observed spectra showed the asymmetry of Quadrupole doublet caused by the Goldanskii-Karyagin Effect as expected by a crystal structure. The asymmetry increased with increasing temperature. We obtained the asymmetry parameter A and then obtained the < u // 2 > - <u ┴ 2 > value for each sample at each temperature.
