Thermal properties of molecular crystals through dispersion-corrected quasi-harmonic ab initio calculations: the case of urea.
نویسندگان
چکیده
An ab initio quantum-mechanical theoretical framework is presented to compute the thermal properties of molecular crystals. The present strategy combines dispersion-corrected density-functional-theory (DFT-D), harmonic phonon dispersion, quasi-harmonic approximation to the lattice dynamics for thermal expansion and thermodynamic functions, and quasi-static approximation for anisotropic thermo-elasticity. The proposed scheme is shown to reliably describe thermal properties of the urea molecular crystal by a thorough comparison with experimental data.
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عنوان ژورنال:
- Chemical communications
دوره 52 9 شماره
صفحات -
تاریخ انتشار 2016