Ca2CrOsO6 crystallizes in the monoclinic P2_1/c space group. Ca(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Cr(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Os(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1), one Cr(1), and one Os(1) atom to form distorted corner-sharing OCa2CrOs trigonal pyramids. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ca(1), one Cr(1), and one Os(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ca(1) and one Cr(1) atom.
Ca2CrOsO6 crystallizes in the monoclinic P2_1/c space group. Ca(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There is one shorter (2.41 Å) and one longer (2.46 Å) Ca(1)-O(1) bond length. There is one shorter (2.51 Å) and one longer (2.61 Å) Ca(1)-O(2) bond length. There is one shorter (2.28 Å) and one longer (2.35 Å) Ca(1)-O(3) bond length. Cr(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Cr(1)-O(1) bond lengths are 2.06 Å. Both Cr(1)-O(2) bond lengths are 2.03 Å. Both Cr(1)-O(3) bond lengths are 1.84 Å. Os(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Os(1)-O(1) bond lengths are 1.91 Å. Both Os(1)-O(2) bond lengths are 1.87 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1), one Cr(1), and one Os(1) atom to form distorted corner-sharing OCa2CrOs trigonal pyramids. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ca(1), one Cr(1), and one Os(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ca(1) and one Cr(1) atom.