SINGLE-CRYSTAL GROWTH AND STRUCTURE REFINEMENT OF RBAU AND CSAU

Single-crystals of RbAu and CsAu were obtained by the reaction of the alkalimetal azides with gold-powder at 400-degrees-C. The structures were determined from X-ray single-crystal diffraktometer data: space group Pm3m, Z = 1; RbAu, a = 4.098(1) angstrom, R/R(w)(w = 1) = 0.011/0.011, N(F(o)2) greater-than-or-equal-to 3simga(F(o)2) = 41 and N(var.) = 4; CsAu, a = 4.258(1) angstrom, R/R(w)(w = 1) = 0.009/0.010, N(F(o)2) greater-than-or-equal-to 3sigma(F(o)2) = 34 and N(var.) = 4. Both compounds crystallize in the completely ordered CsCl-type with neglible deviations from the ideal 1 : 1-composition.