fcc lattice of binary hard sphere mixture

[h9290218;at;hkusub.hku.hk (Danny Yau)]

 Dear Netters:
 	I would like to investigate the liquid-solid transition state of
 binary hard sphere mixture by using order parameter in Monte-Carlo
 simulation. I need a perfect fcc lattice of binary hard sphere mixture
 for my starting configuration. In Allen's text book, it only provide the
 fcc perfect lattice in pure component. It work ok in binary mixture if
 the reduced density is low(e.g. 0.2). But overlap is occured when
 reduced density is getting high such as 0.9. That what I need in the
 phase transition density of binary mixture. Would anyone has that kind
 of program to create the perfect face-centre-cubic lattice of binary
 mixture(i.e. two different size of the particles,such as NaCl, KCl) in high
 density? Would you please send this program to me or give me any idea to
 get them?
 	Thank in advance for any responds.
 Best wishes,
 --
 Danny Yau                       email: h9290218;at;hkuxa.hku.hk
 Department of chemistry,           or  h9290218;at;hkusub.hku.hk
 The university of Hong Kong.