The Mossbauer and X-Ray Studies of the Spinel Ferrites Cu 0:5 Fe 0:5 Cr 2 Se 4 and Cu 0:2 Fe 0:8 Cr 2 Se 4 Prepared by the Ceramic Method

were prepared as polycrystalline samples using ceramicmethod. The assumed composition was verifled by wavelength-dispersiveX-ray °uorescence spectrometry. The X-ray analysis was carried out in orderto make phase analysis and to compare its results with those obtained withthe M˜ossbauer spectroscopy.PACS numbers: 61.05.cp, 61.66.Fn, 82.80.Ej, 75.50.Gg