Structural Phase Transition and Thermal Behavior of C2H5NH3Hg(CN)2Cl

Abstract

C2H5NH3Hg(CN)2Cl belongs to the family of materials with one‐dimension structural character. X‐ray diffraction investigations, calorimetric and dielectric measurements show the occurence of a structural phase transition at Tc = 250 K from a quadratic high temperature form (P4/mmm, Z = 2) to a triclinic low temperature form (P1, Z = 2) and corresponding to a slight deformation of the unit cell when decreasing the temperature.