Thermodynamic Properties and Phase Transitions of Thallous Cyanide Crystal

Abstract
The heat capacities of TlCN crystal were measured from 15 to 300°K with an adiabatic calorimeter. Three regions of anomalously high heat capacity were discovered. Thermodynamic functions of the crystal were calculated by the graphical integration of the heat capacity data. 205Tl nuclear magnetic resonance was observed as functions of temperature and applied static magnetic field. Their second moment values could be interpreted in terms of the anisotropic chemical shift tensor.