Ca3Mn2(SbO6)2 crystallizes in the monoclinic Pm space group. There are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(6), one O(7), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(5), one O(8), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. In the third Ca site, Ca(3) is bonded in a 8-coordinate geometry to one O(5), one O(8), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. Mn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 25-33°. Sb(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(7) atom to form SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra and corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 25-33°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), one Mn(1), and one Sb(1) atom. In the second O site, O(2) is bonded to one Ca(2), one Ca(3), one Mn(1), and one Sb(1) atom to form distorted edge-sharing OCa2MnSb trigonal pyramids. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Mn(1), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(3), one Mn(1), and one Sb(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ca(2), one Ca(3), and two equivalent Sb(1) atoms. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Ca(1) and two equivalent Mn(1) atoms. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1) and two equivalent Sb(1) atoms. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Ca(2), one Ca(3), and two equivalent Mn(1) atoms.
Ca3Mn2(SbO6)2 crystallizes in the monoclinic Pm space group. There are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(6), one O(7), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. The Ca(1)-O(6) bond length is 2.37 Å. The Ca(1)-O(7) bond length is 2.31 Å. Both Ca(1)-O(1) bond lengths are 2.69 Å. Both Ca(1)-O(3) bond lengths are 2.37 Å. Both Ca(1)-O(4) bond lengths are 2.54 Å. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(5), one O(8), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. The Ca(2)-O(5) bond length is 2.36 Å. The Ca(2)-O(8) bond length is 2.42 Å. Both Ca(2)-O(1) bond lengths are 2.40 Å. Both Ca(2)-O(2) bond lengths are 2.48 Å. Both Ca(2)-O(3) bond lengths are 2.55 Å. In the third Ca site, Ca(3) is bonded in a 8-coordinate geometry to one O(5), one O(8), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. The Ca(3)-O(5) bond length is 2.44 Å. The Ca(3)-O(8) bond length is 2.33 Å. Both Ca(3)-O(1) bond lengths are 2.61 Å. Both Ca(3)-O(2) bond lengths are 2.33 Å. Both Ca(3)-O(4) bond lengths are 2.73 Å. Mn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 25-33°. The Mn(1)-O(1) bond length is 1.98 Å. The Mn(1)-O(2) bond length is 1.98 Å. The Mn(1)-O(3) bond length is 1.95 Å. The Mn(1)-O(4) bond length is 1.94 Å. The Mn(1)-O(6) bond length is 1.95 Å. The Mn(1)-O(8) bond length is 2.04 Å. Sb(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(7) atom to form SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra and corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 25-33°. The Sb(1)-O(1) bond length is 2.02 Å. The Sb(1)-O(2) bond length is 1.98 Å. The Sb(1)-O(3) bond length is 1.99 Å. The Sb(1)-O(4) bond length is 2.00 Å. The Sb(1)-O(5) bond length is 2.05 Å. The Sb(1)-O(7) bond length is 1.96 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), one Mn(1), and one Sb(1) atom. In the second O site, O(2) is bonded to one Ca(2), one Ca(3), one Mn(1), and one Sb(1) atom to form distorted edge-sharing OCa2MnSb trigonal pyramids. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Mn(1), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(3), one Mn(1), and one Sb(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ca(2), one Ca(3), and two equivalent Sb(1) atoms. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Ca(1) and two equivalent Mn(1) atoms. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1) and two equivalent Sb(1) atoms. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Ca(2), one Ca(3), and two equivalent Mn(1) atoms.