On Tuesday 17 January 2006 17:51, Nichols A. Romero wrote: > I was doing vc-relax on a vdW bonded system you shouldn't. Van der Waals bonded systems are not well described by DFT. Paolo -- Paolo Giannozzi e-mail: giannozz at nest.sns.it Scuola Normale Superiore Phone: +39/050-509876, Fax:-563513 Piazza dei Cavalieri 7 I-56126 Pisa, Italy