SrCa is alpha La-derived structured and crystallizes in the trigonal R-3m space group. Sr(1) is bonded to six equivalent Sr(1) and six equivalent Ca(1) atoms to form SrSr6Ca6 cuboctahedra that share corners with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra, faces with six equivalent Sr(1)Sr6Ca6 cuboctahedra, and faces with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra. Ca(1) is bonded to six equivalent Sr(1) and six equivalent Ca(1) atoms to form CaSr6Ca6 cuboctahedra that share corners with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra, faces with six equivalent Ca(1)Sr6Ca6 cuboctahedra, and faces with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra.
SrCa is alpha La-derived structured and crystallizes in the trigonal R-3m space group. Sr(1) is bonded to six equivalent Sr(1) and six equivalent Ca(1) atoms to form SrSr6Ca6 cuboctahedra that share corners with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra, faces with six equivalent Sr(1)Sr6Ca6 cuboctahedra, and faces with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra. All Sr(1)-Sr(1) bond lengths are 4.13 Å. All Sr(1)-Ca(1) bond lengths are 4.13 Å. Ca(1) is bonded to six equivalent Sr(1) and six equivalent Ca(1) atoms to form CaSr6Ca6 cuboctahedra that share corners with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra, faces with six equivalent Ca(1)Sr6Ca6 cuboctahedra, and faces with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra. All Ca(1)-Ca(1) bond lengths are 4.13 Å.