Dear Anna, Different occupations signify that the reference configurations with respect to which the pseudopotentials were generated were taken differently. If you would like to know more about what this means I suggest you read the documentation that comes with the generation code.
The other difference is that the one that's called nsp has nonlinear core corrections while the other one doesn't. Best, Hande -- Hande Toffoli Department of Physics Office 439 Middle East Technical University Ankara 06531, Turkey Tel : +90 312 210 3264 http://www.physics.metu.edu.tr/~hande
