Abstract
The static phase transition points of ZnSe and ZnSexS1-x(0.40 ≤ x ≤ 1) single crystals in the high pressure region are determined based on the transformation pressures of Bi I-II, Bi III-V, and ZnS using the cubic anvil method where the pressure-induced variation of resistance is measured. The transition pressures of the samples vary almost linearly with the composition of ZnS in ZnSexS1-x.