Norrby also provides a set of programs for new force field development and some relevant examples. The potentials are in a form suitable for us in the GULP and Marvin programs, but may be relevant to other environments as well.
Documentation is contained within the distribution.
The potentials are in a form suitable for us in the GULP and Marvin programs, but may be relevant to other environments as well. Files are expressed in XMD format, which is also described therein. The potentials are divided into separate files for the atomic density function, the embedding energy and the pair interaction energy. Documentation, in the form of a PDF version of the paper reporting these potentials, is also available for free download. The package can also be used to test the accuracy of force-field optimized molecular geometries.