van der Waals radii

[Anthony Stone <AJS1 (- at -) phx.cam.ac.uk>]

 A further issue in the context of van der Waals radii is that atoms in
 molecules are not spherical, so one has to consider whether some sort of
 spherical average is in fact appropriate, or whether the anisotropy needs to
 be taken into account. The paper by Nyburg & Faerman in Acta Cryst B41
 (1985)
 274 gives an analysis of crystal packings that shows the anisotropies very
 clearly. Sally Price and I have reviewed this issue, among others, in J. Phys.
 Chem. 92 (1988) 3325.
 Anthony Stone
 University Chemical Laboratory,         Internet: ajs1 (- at -) phx.cam.ac.uk
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