The transition metal phosphorus trichalcogenides MnPS 3 and the FePS 3 are CdCl 2 type layered compounds, where the transition metal ions form a hexagonal lattice. While these compounds order anti-ferromagnetically at low temperature, the magnetic structures are different. We have reported that these mixtures Mn 0.5 Fe 0.5 PS 3 is a spin glass with a glass transition temperature T g =33.7 K. Then, in this work, we report that the results of the temperature variation of the 57 Fe Mö ssbauer spectra of FePS 3 and Mn 0.5 Fe 0.5 PS 3 , in detail. In the antiferromagnetic state of FePS 3 , the hyperfine magnetic field H int increases with decreasing temperature and the Isomer shift I. S. increases slightly with decreasing temperature. However in Mn 0.5 Fe 0.5 PS 3 , the two broadened peaks are observed and the two peaks became a single peak with decreasing temperature at about 50.0 K, which is higher than T g =33.7 K. In the spin glass Mn 0.5 Fe 0.5 PS 3 , the Mö ssbauer spectra suggest that the magnetic interactions exist far above T g .
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