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In conclusion then, this brief survey has sought to bring together just some of the diverse problems that are now tractable from a computational point of view. In the forseeable future two areas stand out as ripe for further progress. They are:(i)The development of improved solid state potentials, including many body effects and refinements to the shell model(ii)The application of defect lattice methods...
The methodsdescribed in this section enable us to perform accurate and reliable calculations of the properties of perfect and defective lattices where good potential models of the pair-wise type may be derived. The limitation of the type of potential model which may be effectively used in the calculations has tended to confine their application to the study of ionic and semi-ionic materials; the types...
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