Van der Waals radiusvan der Waals radii are established from contact distances between non-bonding atoms in touching molecules or atoms. Unitspm NotesVan der Waals radii may be established from neighbour-neighbour interactions in crystals and from gas critical volumes. Values from tables in different sources differ. Those quoted in WebElements are taken from reference 1 while other marginally different compilations are located in references 2-5. Users of the Chemical Database Service (CDS) at Daresbury who make use of the Cambridge Structural Database System will also find these values reproduced in the "Getting Started" user manual. Literature sources
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