How we can build a crystalline structure with Molden? Of course if you already have your molecule in a file format that supports and contains crystal information, just read it in to molden. Molden supports the following file formats with crystal information: FDAT, CSSR, (BioSYM) CAR, MSF (QUANTA), Mol2 (Sybyl), ShelX, MSI, CONTCAR (VASP) If you dont have crystal information for your molecule, here