double OEGetPaulingVdWRadius(unsigned int elemno)

Returns the Van der Waals radius for a particular atomic number as tabulated by Linus Pauling [Pauling-1960]. There are several experimental values for Van der Waals radii (see also OEGetBondiVdWRadius) and many additional values used in molecular mechanics forcefields (including united-atom VdW radii), so there is often no definitive notion of Van der Waals radius.