Optical properties of the Cr$_{5}$S$_{6}$ single crystal

Results of the investigation of optical density spectra of Cr$_{5}$S$_{6}$ single crystals in the infrared region have been presented. A comparative analysis of the temperature dependences of the magnetization and the light absorption has been performed. Physical mechanisms to explain the specific features of the spectral and temperature dependences of the optical density have been proposed.