Lattice Dynamics in KNO3, Phases I, II and III
Since potassium nitrate is known to possess ferroelectric properties in one of its three phases, a renewal of interest of this material has been recently stimulated. The appearance of the ferroelectric phase transition in some materials has been related to the lattice dynamical properties of the crystal[l] and one may therefore expect that a detailed study of the lattice dynamics of the different crystallographic varieties of KNO3 would lead to a better understanding of its ferroelectric phase transistion.
KeywordsNormal Mode Ionic Mode Infrared Absorption Ferroelectric Phase Rotational Mode
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