Raman scattering and lattice-dynamical calculations of crystalline KNO3.

Abstract

The Raman spectrum of a ${\mathrm{KNO}}_{3}$ single crystal was measured at both room and liquid-nitrogen temperatures. Lattice-dynamical calculations, based on the rigid-ion approximation and empirical potentials, were performed. The possibility of a phase transition at 217 K was investigated by measuring the temperature dependence of the Raman spectrum.