Semiconductor Physics, Quantum Electronics & Optoelectronics, 22 (1), P. 26-33 (2019).
DOI: https://doi.org/10.15407/spqeo22.01.026

Synthesis and characterization of new potassium-containing argyrodite-type compounds
I.P. Studenyak1, A.I. Pogodin1, V.I. Studenyak1, O.P. Kokhan1, Yu.M. Azhniuk1,2, C. Cserháti3, S. Kökényesi3, D. R.T. Zahn4

1Uzhhorod National University, Faculty of Physics 3, Narodna Sq., 88000 Uzhhorod, Ukraine
2Institute of Electron Physics, National Academy of Sciences of Ukraine, Uzhhorod, Ukraine
3Department of Experimental Physics, Faculty of Science and Technology, University of Debrecen, 18/a Bem Sq., 4026 Debrecen, Hungary,
4Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany E-mail: studenyak@dr.com

Abstract. Potassium halogenthiophosphates K6PS5Br and K6PS5Cl as well as halogen-free K7PS6 compound were synthesized using the two-step technique from elemental substances as well as potassium halides. The elemental composition of the obtained samples was determined using energy-dispersive X-ray spectroscopy. Raman spectra of K6PS5Br and K6PS5Cl show themselves to be much similar to those of chemically related Cu6PS5Br and Cu6PS5Cl argyrodite crystals. The much richer spectra of K6PS5Br and K6PS5Cl as well as K7PS6, however, reveal that their structure most likely differs from the cubic structure of Cu6PS5Br and Cu6PS5Cl argyrodites.

Keywords: argyrodite, synthesis, scanning electron microscopy, Raman spectroscopy.

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