Universal basis sets from all-electron calculations can be adapted to
be used along with pseudopotentials by the generator coordinate method
(GCM). Calculations carried out with Hay and Wadt or Steven, Bash and
Krauss pseudopotentials along with a universal basis set are in agree
ment with all-electron calculations and also with improved basis sets
specially developed to be used with pseudopotential. The support provi
ded by GCM allows a simple procedure to enlarge or reduce the size of
the universal basis set as well as a systematic procedure to include p
olarization functions. (C) 1997 Elsevier Science B.V.