Recent developments in phonon models and microscopic theories of lattice mechanics have
been reviewed, with particular emphasis on binary ionic solids. In doing so, we have traced …

We present interaction potentials for AgCl and AgBr derived from quantum-mechanical
approximations and fitted to the experimental lattice constant and energy, elastic and …

Using some recently developed interionic potentials the problem of relative stability and
structural phase transition is studied in fifteen alkaline earth chalcogenides. The NaCl …

The deformable-shell model developed by Basu and Sengupta and later substantiated by a
potential form by Sarkar and Sengupta has found wide application in describing the different …

In this report we present a simple statistical-model derivation of the three-body interaction
envisaged in the deformable-shell model developed by Basu and Sengupta. Next the model …

The thallium group of halides have certain characteristic properties compared to the other
alkali-halide crystals. The peculiarities are manifest in connection with the static lattice …

The silver halide crystals have many peculiarities in their physical properties which are
uncommon among the simple ionic solids. The different theoretical models used to calculate …

A microscopic calculation is performed of the phonon spectrum of the alkali halide crystals
KCl and KBr in the approximation where the dielectric matrix is assumed to be of separable …

A theory for the change in polarisabilities of ions in crystal environment from their free ion
values is presented. The contribution to this change is shown to come from the pure third …

The Lundqvist three‐body interaction which was originally deduced for rigid ions is
rederived in the framework of a shell model. Some discrepancies in a previous interpretation …