CCL: Silica (alpha quartz) configuration

 Sent to CCL by: "Parveen  Sachdeva" [pksiit+*]
 Hi Everybody,
 I want to generate various configurations of SiO2 (alpha quartz) for molecular
 dynamics study. I was trying to find some literature online but did not manage
 much. If anyone can help me suggest some method of generating lattice structures
 or some software that does that it would be great help.
 I want to generates coordinates of SiO2 as nx,ny,nz number of unit cells in each
 direction. I hope I'm able to explain what I am trying to do here.
 thanks for the help in advance.