Special Issue-Dynamics of Molecular Crystals. Dynamic Aspects of Molecular Crystals Studied by Vibrational Spectroscopy.

Vibrational Spectroscopy and Structural Phase Transitions in Molecular Crystals

Vibrational spectroscopy can give useful informa tian, both structural and dynamical, about phase transitions in molecular crystals. In particular, the data concerning the mechanism of the transformation at molecular level can be obtained. This is illustrated by examples of pure van der Waals crystals such as 3,5-dichloropyridine and 4-methylpyridine, hydrogen bonded malonic acid, inorganic fer...

Molecular Dynamics of Covalent Crystals

A molecular mechanics-like two and three body potential is implemented in the ITAP molecular dynamics program IMD . First results on the simulation of covalent crystals are presented.

Mode anharmonicity in molecular crystals studied by piezomodulated Raman spectrosocpy.

Molecular Crystals and Liquid Crystals

Molecular Crystals and Liquid Crystals

The problem of finding the equilibrium shape of a small particle by the Wulff construction is reviewed briefly, with emphasis on its applications to liquid crystals. The proof of Wulff’s theorem is stated in a concise mathematical form. Some typical equilibrium shapes of liquid crystalline cirops are described. When there is orientational order of the molecules in the liquid crystal but no tran...