Electrical conductivity and thermoelectrical parameters of argyrodite-type Cu7 – xPS6 – xIx mixed crystals - A. I. Pogodin; M. M. Luchynets; M. Y. Filep; A. A. Kohutych; T. O. Malakhovska; O. P. Kokhan; Yu. Sabov; I. P. Studenyak; P. Kúš (Ukrainian Journal of Physics, 2021)