Yu. M. Vysochanskii, M. I. Gurzan, V. M. Rizak, L. A. Seikovskaya, V. Yu. Slivka, V. G. Furtsev, M. M. Khoma, “Soft phonon spectrum and phase diagram of $\mathrm{Sn}(\mathrm{Pb})_{2}\mathrm{P}_{2}\mathrm{S}(\mathrm{Se})_{6}$ ferroelectrics”, Fizika Tverdogo Tela, 1987, Volume 29, Issue 2,Pages <nobr>530

Soft phonon spectrum and phase diagram of $\mathrm{Sn}(\mathrm{Pb})_{2}\mathrm{P}_{2}\mathrm{S}(\mathrm{Se})_{6}$ ferroelectrics

Yu. M. Vysochanskii, M. I. Gurzan, V. M. Rizak, L. A. Seikovskaya, V. Yu. Slivka, V. G. Furtsev, M. M. Khoma

Uzhgorod State University

UDC: 537.36

Received: 25.08.1986