[1] COLL MIL ROYAL,DEPT CHIM,ST JEAN,QUEBEC,CANADA
[2] MAX PLANCK INST FESTKORPERFORSCH,D-7000 STUTTGART 80,FED REP GER
[3] VIENNA UNIV,LUDWIG BOLTZMANN INST FESTKORPERFORSCH,A-1010 VIENNA,AUSTRIA
[4] VIENNA UNIV,INST FESTKORPERPHYS,A-1010 VIENNA,AUSTRIA