BaO(SrO) is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. Ba(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form BaO6 octahedra that share corners with six equivalent Ba(1)O6 octahedra, edges with four equivalent Ba(1)O6 octahedra, and edges with eight equivalent Sr(1)O6 octahedra. The corner-sharing octahedra are not tilted. Sr(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form SrO6 octahedra that share corners with six equivalent Sr(1)O6 octahedra, edges with four equivalent Sr(1)O6 octahedra, and edges with eight equivalent Ba(1)O6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ba(1) and four equivalent Sr(1) atoms to form OBa2Sr4 octahedra that share corners with six equivalent O(1)Ba2Sr4 octahedra, edges with four equivalent O(1)Ba2Sr4 octahedra, and edges with eight equivalent O(2)Ba4Sr2 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to four equivalent Ba(1) and two equivalent Sr(1) atoms to form OBa4Sr2 octahedra that share corners with six equivalent O(2)Ba4Sr2 octahedra, edges with four equivalent O(2)Ba4Sr2 octahedra, and edges with eight equivalent O(1)Ba2Sr4 octahedra. The corner-sharing octahedra are not tilted.
BaO(SrO) is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. Ba(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form BaO6 octahedra that share corners with six equivalent Ba(1)O6 octahedra, edges with four equivalent Ba(1)O6 octahedra, and edges with eight equivalent Sr(1)O6 octahedra. The corner-sharing octahedra are not tilted. Both Ba(1)-O(1) bond lengths are 2.71 Å. All Ba(1)-O(2) bond lengths are 2.72 Å. Sr(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form SrO6 octahedra that share corners with six equivalent Sr(1)O6 octahedra, edges with four equivalent Sr(1)O6 octahedra, and edges with eight equivalent Ba(1)O6 octahedra. The corner-sharing octahedra are not tilted. Both Sr(1)-O(2) bond lengths are 2.71 Å. All Sr(1)-O(1) bond lengths are 2.72 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ba(1) and four equivalent Sr(1) atoms to form OBa2Sr4 octahedra that share corners with six equivalent O(1)Ba2Sr4 octahedra, edges with four equivalent O(1)Ba2Sr4 octahedra, and edges with eight equivalent O(2)Ba4Sr2 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to four equivalent Ba(1) and two equivalent Sr(1) atoms to form OBa4Sr2 octahedra that share corners with six equivalent O(2)Ba4Sr2 octahedra, edges with four equivalent O(2)Ba4Sr2 octahedra, and edges with eight equivalent O(1)Ba2Sr4 octahedra. The corner-sharing octahedra are not tilted.