BABEL input data?

   Dear Netters:
   I have been using BABEL to transform MOPAC output for viewing with
 ALCHEMY.  Now I need to modify some crystallographic data for viewing
 with ALCHEMY.  The BABEL instructions mention "FREE FORM FRACTIONAL"
 input, but I don't have a example of typical data.  I have a list of
 xyz fractional coordinates that I would like to convert to ALCHEMY
 input.  I am not sure how to enter the unit cell dimensions and dir-
 ection cosines for a monoclinic unit cell.
   Regards,  Dave Close.