RbBr
Ahtee M
Annales Academiae Scientiarum Fennicae Series A6: Physica 313 (1969) 1-11
Lattice constants of some binary alkali halide solid solutions.
_database_code_amcsd 0011998
6.8768 6.8768 6.8768 90 90 90 Fm3m
atom  x  y  z
Rb    0  0  0
Br   .5 .5 .5