CaSrLaSbO6 crystallizes in the orthorhombic Cccm space group. Sr(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(3) atoms. Ca(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. La(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form LaO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-35°. Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form SbO6 octahedra that share corners with six equivalent La(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-35°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent Ca(1), one La(1), and one Sb(1) atom. In the second O site, O(2) is bonded to two equivalent Ca(1), one La(1), and one Sb(1) atom to form distorted OCa2LaSb tetrahedra that share corners with four equivalent O(3)Sr2LaSb tetrahedra, corners with six equivalent O(2)Ca2LaSb tetrahedra, and  an edgeedge with one O(2)Ca2LaSb tetrahedra. In the third O site, O(3) is bonded to two equivalent Sr(1), one La(1), and one Sb(1) atom to form distorted OSr2LaSb tetrahedra that share corners with four equivalent O(2)Ca2LaSb tetrahedra, corners with six equivalent O(3)Sr2LaSb tetrahedra, and  an edgeedge with one O(3)Sr2LaSb tetrahedra.
CaSrLaSbO6 crystallizes in the orthorhombic Cccm space group. Sr(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(3) atoms. All Sr(1)-O(1) bond lengths are 2.98 Å. All Sr(1)-O(3) bond lengths are 2.62 Å. Ca(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. All Ca(1)-O(1) bond lengths are 2.98 Å. All Ca(1)-O(2) bond lengths are 2.60 Å. La(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form LaO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-35°. Both La(1)-O(1) bond lengths are 2.31 Å. Both La(1)-O(2) bond lengths are 2.40 Å. Both La(1)-O(3) bond lengths are 2.37 Å. Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form SbO6 octahedra that share corners with six equivalent La(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-35°. Both Sb(1)-O(1) bond lengths are 2.01 Å. Both Sb(1)-O(2) bond lengths are 2.03 Å. Both Sb(1)-O(3) bond lengths are 2.01 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent Ca(1), one La(1), and one Sb(1) atom. In the second O site, O(2) is bonded to two equivalent Ca(1), one La(1), and one Sb(1) atom to form distorted OCa2LaSb tetrahedra that share corners with four equivalent O(3)Sr2LaSb tetrahedra, corners with six equivalent O(2)Ca2LaSb tetrahedra, and  an edgeedge with one O(2)Ca2LaSb tetrahedra. In the third O site, O(3) is bonded to two equivalent Sr(1), one La(1), and one Sb(1) atom to form distorted OSr2LaSb tetrahedra that share corners with four equivalent O(2)Ca2LaSb tetrahedra, corners with six equivalent O(3)Sr2LaSb tetrahedra, and  an edgeedge with one O(3)Sr2LaSb tetrahedra.