Ca2WSbO6 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(3), one O(4), two equivalent O(2), and four equivalent O(1) atoms. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(3), one O(4), two equivalent O(1), and four equivalent O(2) atoms. W(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form WO6 octahedra that share corners with two equivalent W(1)O6 octahedra and corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-39°. 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 two equivalent Sb(1)O6 octahedra and corners with four equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-43°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Ca(2), two equivalent Ca(1), one W(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ca(1), two equivalent Ca(2), one W(1), and one Sb(1) atom. In the third O site, O(3) is bonded to one Ca(1), one Ca(2), and two equivalent Sb(1) atoms to form OCa2Sb2 tetrahedra that share corners with two equivalent O(3)Ca2Sb2 tetrahedra and corners with two equivalent O(4)Ca2W2 trigonal pyramids. In the fourth O site, O(4) is bonded to one Ca(1), one Ca(2), and two equivalent W(1) atoms to form distorted OCa2W2 trigonal pyramids that share corners with two equivalent O(3)Ca2Sb2 tetrahedra and corners with two equivalent O(4)Ca2W2 trigonal pyramids.
Ca2WSbO6 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(3), one O(4), two equivalent O(2), and four equivalent O(1) atoms. The Ca(1)-O(3) bond length is 2.31 Å. The Ca(1)-O(4) bond length is 2.45 Å. Both Ca(1)-O(2) bond lengths are 2.71 Å. There are two shorter (2.40 Å) and two longer (2.82 Å) Ca(1)-O(1) bond lengths. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(3), one O(4), two equivalent O(1), and four equivalent O(2) atoms. The Ca(2)-O(3) bond length is 2.40 Å. The Ca(2)-O(4) bond length is 2.34 Å. Both Ca(2)-O(1) bond lengths are 2.91 Å. There are two shorter (2.34 Å) and two longer (2.85 Å) Ca(2)-O(2) bond lengths. W(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form WO6 octahedra that share corners with two equivalent W(1)O6 octahedra and corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-39°. Both W(1)-O(1) bond lengths are 1.96 Å. Both W(1)-O(2) bond lengths are 2.05 Å. Both W(1)-O(4) bond lengths are 2.13 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 two equivalent Sb(1)O6 octahedra and corners with four equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-43°. Both Sb(1)-O(1) bond lengths are 2.34 Å. Both Sb(1)-O(2) bond lengths are 2.33 Å. Both Sb(1)-O(3) bond lengths are 2.18 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Ca(2), two equivalent Ca(1), one W(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ca(1), two equivalent Ca(2), one W(1), and one Sb(1) atom. In the third O site, O(3) is bonded to one Ca(1), one Ca(2), and two equivalent Sb(1) atoms to form OCa2Sb2 tetrahedra that share corners with two equivalent O(3)Ca2Sb2 tetrahedra and corners with two equivalent O(4)Ca2W2 trigonal pyramids. In the fourth O site, O(4) is bonded to one Ca(1), one Ca(2), and two equivalent W(1) atoms to form distorted OCa2W2 trigonal pyramids that share corners with two equivalent O(3)Ca2Sb2 tetrahedra and corners with two equivalent O(4)Ca2W2 trigonal pyramids.