Cu 1-х Ag x) 7 GeS 5 I mixed crystals were grown using the Bridgman-Stockbarger method. The hardness dependences on the indentation depth profiles in (Cu 1-x Ag x) 7 GeS 5 I mixed crystals were investigated. The measurements of mechanical parameters were performed at the room temperature by using the micro-indentation method. Variations of the hardness of (Cu 1-x Ag x) 7 GeS 5 I mixed crystals were interpreted in the framework of the deformation gradient model. The influence of cation Cu→Ag substitution on mechanical parameters of (Cu 1-x Ag x) 7 GeS 5 I mixed crystals was studied.

The hardness and Young's modulus dependences on the instrumented indentation depth profiles in Cu 6 PS 5 I single crystals and Cu 6 PS 5 I-based thin films were investigated. The measurements of mechanical parameters were performed at the room temperature by instrumented indentation in the continuous stiffness measurement mode with harmonic modulation of load during its linear increase. The variations of the hardness and Young's modulus in Cu 6 PS 5 І single crystals were interpreted in the framework of deformation gradient model. The decrease of micro-hardness in Cu 6 PS 5 I-based thin film observed with copper content increase was explained by formation of conductive clusters and dendrites.