TY  - JOUR
T1  - Structure–property relationships in Ag6+x(P1xSix)S5I argyrodite-type solid solutions
AU  - Pogodin, A.I.
AU  - Filep, M.J.
AU  - Shender, I.O.
AU  - Malakhovska, T.O.
AU  - Kokhan, O.P.
AU  - Izai, V.
JO  - Semiconductor Physics, Quantum Electronics & Optoelectronics
VL  - 29
IS  - 1
SP  - 028
EP  - 035
PY  - 2026
DO  - 10.15407/spqeo29.01.028
UR  - https://doi.org/10.15407/spqeo29.01.028
AB  - In this work, single crystals of solid solutions Ag6.25P0.75Si0.25S5I and Ag6.75P0.25Si0.75S5I were obtained and studied. The synthesis was carried out using a one-temperature method, and the crystals were grown by directional crystallization from a melt. The crystal structure was investigated using X-ray diffraction with Rietveld refinement. It was established that the compounds crystallize in space group F-43m with lattice parameters a = 10.549 and 10.604. Electrical properties studied by impedance spectroscopy revealed predominantly ionic conductivity, exceeding the electronic contribution by four orders of magnitude. Increasing silicon content enhances ionic conductivity up to 102 S/cm and reduces activation energy. These effects are attributed to changes in the crystal structure and mobility of Ag+ ions.
KW  - argyrodite
KW  - single crystal
KW  - ionic conductivity
KW  - solid solutions.
ER  -