van der Waal's radius from Universal Force Field (UFF)

From: skpang(at)ctimail.com
Subject: van der Waal's radius from Universal Force Field (UFF)
Date: Tue, 25 May 2004 00:31:41 +0800 (HKT)

Dear all,
 In Gaussian quantum chemical software, UFF (Universal Force Field)
 radii can be choosen for building a cavity of molecule in SCRF
 calculation.
 Does anybody know how these UFF radii come from, especially the Pt
 atom?
 For example, the UFF radius for Pt atom is 1.72 in Gaussian 98 SCRF=PCM
 calculation.
 Thank you for your attention.
 Best regards,
 Patrick