Xtal Lattice Needed

Uncle Al UncleAl0 at hate.spam.net
Sun Jan 28 19:45:24 EST 2001

Uncle Al requests identities of chiral crystals meeting the following

   1) heavy atom-containing (Ta, W, Au, Hg, Pb, Bi; Th but not U), 
   2) ionic or intermetallic (molecular probably packs too loosely), 
   3) with a unit cell volume less than 130 cubic angstroms
   4) with a simple chiral space group (only screw axes 3(1), 3(2),
4(1), 4(3), 6(1), 6(2), 6(3), 6(4), or 6(5) would be nice; *no* rich
symmetries like P2(1)3, P3(2)21, P3(2)1, P3(1)21, P2(1)2(1)2(1),
P4(1)2(1)2, P4(3)2(1)2, etc.)
   5) and not ferroelectric (excludes most perovskites and ferrites;
pyroelectric is OK)

If you have a winner, please post in reply. 

Uncle Al
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