Rb$_{1-x}$Cs$_{x}$NO$_{3}$ ($x$ = 0.025, 0.05, 0.1) single crystals and their high-temperature X-ray study

Polymorphic transformations in Rb$_{0.975}$Cs$_{0.025}$NO$_{3}$, Rb$_{0.950}$Cs$_{0.05}$NO$_{3}$, and Rb$_{0.90}$Cs$_{0.1}$NO$_{3}$ crystals grown by us have been studied by the X-ray diffraction method. Four different modifications are found for crystals in the range from room temperature to the melting point. The transformation temperatures and the unit-cell parameters are determined for the crystals of these modifications.