A non-central Fielek model for lattice vibrations in platinum

The Fielek model is made simple and more effective by modifying it for (a) purely central and short-range ionic interactions, (b) angular interactions coupling the nearby d shells, (c) easily computable volume interactions and (d) for crystal equilibrium in complicated f.c.c. lattices. The model, involving a minimum number of input data, is tested for its validity in predicting the dispersion relations in platinum.