l The first derivation of the pseudo Jahn-Teller effect has been given by Opik and Price in 1957 (Proc. Roy. Soc. A238, 425 ) -- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Isaac B. Bersuker | E-mail: Dept. of Chemistry | cmao771 -8 at 8- charon.chpc.utexas.edu Univeristy of Texas at Austin | Vox: (512) 471-4671 Austin, TX 78712 | Fax: (512) 471-8696 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *