Ca2CrSbO6 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), two equivalent O(4), and four equivalent O(3) atoms. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), two equivalent O(3), and four equivalent O(4) atoms. Cr(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form CrO6 octahedra that share corners with two equivalent Cr(1)O6 octahedra and corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-31°. Sb(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra and corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 31-32°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Ca(2), and two equivalent Sb(1) atoms to form distorted OCa2Sb2 tetrahedra that share corners with two equivalent O(2)Ca2Cr2 tetrahedra and corners with two equivalent O(1)Ca2Sb2 tetrahedra. In the second O site, O(2) is bonded to one Ca(1), one Ca(2), and two equivalent Cr(1) atoms to form distorted OCa2Cr2 tetrahedra that share corners with two equivalent O(2)Ca2Cr2 tetrahedra and corners with two equivalent O(1)Ca2Sb2 tetrahedra. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Ca(2), two equivalent Ca(1), one Cr(1), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Ca(1), two equivalent Ca(2), one Cr(1), and one Sb(1) atom.
Ca2CrSbO6 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), two equivalent O(4), and four equivalent O(3) atoms. The Ca(1)-O(1) bond length is 2.34 Å. The Ca(1)-O(2) bond length is 2.34 Å. Both Ca(1)-O(4) bond lengths are 2.57 Å. There are two shorter (2.39 Å) and two longer (2.73 Å) Ca(1)-O(3) bond lengths. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), two equivalent O(3), and four equivalent O(4) atoms. The Ca(2)-O(1) bond length is 2.47 Å. The Ca(2)-O(2) bond length is 2.31 Å. Both Ca(2)-O(3) bond lengths are 2.68 Å. There are two shorter (2.35 Å) and two longer (2.75 Å) Ca(2)-O(4) bond lengths. Cr(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form CrO6 octahedra that share corners with two equivalent Cr(1)O6 octahedra and corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-31°. Both Cr(1)-O(2) bond lengths are 2.02 Å. Both Cr(1)-O(3) bond lengths are 2.07 Å. Both Cr(1)-O(4) bond lengths are 2.06 Å. Sb(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra and corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 31-32°. Both Sb(1)-O(1) bond lengths are 2.04 Å. Both Sb(1)-O(3) bond lengths are 1.99 Å. Both Sb(1)-O(4) bond lengths are 1.99 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Ca(2), and two equivalent Sb(1) atoms to form distorted OCa2Sb2 tetrahedra that share corners with two equivalent O(2)Ca2Cr2 tetrahedra and corners with two equivalent O(1)Ca2Sb2 tetrahedra. In the second O site, O(2) is bonded to one Ca(1), one Ca(2), and two equivalent Cr(1) atoms to form distorted OCa2Cr2 tetrahedra that share corners with two equivalent O(2)Ca2Cr2 tetrahedra and corners with two equivalent O(1)Ca2Sb2 tetrahedra. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Ca(2), two equivalent Ca(1), one Cr(1), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Ca(1), two equivalent Ca(2), one Cr(1), and one Sb(1) atom.