Alexey I have a quartz(101) surface and a gromacs BKS input file that might get you started at least. Cheers Jim -- View this message in context: http://gromacs.5086.n6.nabble.com/Gromacs-files-to-simulate-SiO2-film-tp4997666p4997673.html Sent from the GROMACS Users Forum mailing list archive at Nabble.com.