Ba2MgYBiO6 crystallizes in the monoclinic Cm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 3-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. In the second Ba site, Ba(2) is bonded in a distorted q6 geometry to one O(3), two equivalent O(2), two equivalent O(4), and four equivalent O(1) atoms. Mg(1) is bonded in a distorted trigonal non-coplanar geometry to one O(4) and two equivalent O(1) atoms. Y(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms. Bi(1) is bonded in a distorted octahedral geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Ba(1), two equivalent Ba(2), one Mg(1), one Y(1), and one Bi(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), one Y(1), and one Bi(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), one Y(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Ba(1), two equivalent Ba(2), one Mg(1), one Y(1), and one Bi(1) atom.
Ba2MgYBiO6 crystallizes in the monoclinic Cm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 3-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. The Ba(1)-O(4) bond length is 2.56 Å. Both Ba(1)-O(1) bond lengths are 2.56 Å. Both Ba(1)-O(3) bond lengths are 3.33 Å. There are two shorter (3.32 Å) and two longer (3.37 Å) Ba(1)-O(2) bond lengths. In the second Ba site, Ba(2) is bonded in a distorted q6 geometry to one O(3), two equivalent O(2), two equivalent O(4), and four equivalent O(1) atoms. The Ba(2)-O(3) bond length is 2.83 Å. Both Ba(2)-O(2) bond lengths are 2.88 Å. Both Ba(2)-O(4) bond lengths are 3.20 Å. There are two shorter (3.18 Å) and two longer (3.21 Å) Ba(2)-O(1) bond lengths. Mg(1) is bonded in a distorted trigonal non-coplanar geometry to one O(4) and two equivalent O(1) atoms. The Mg(1)-O(4) bond length is 1.93 Å. Both Mg(1)-O(1) bond lengths are 1.93 Å. Y(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms. The Y(1)-O(3) bond length is 2.14 Å. The Y(1)-O(4) bond length is 2.51 Å. Both Y(1)-O(1) bond lengths are 2.52 Å. Both Y(1)-O(2) bond lengths are 2.14 Å. Bi(1) is bonded in a distorted octahedral geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms. The Bi(1)-O(3) bond length is 2.19 Å. The Bi(1)-O(4) bond length is 2.75 Å. Both Bi(1)-O(1) bond lengths are 2.76 Å. Both Bi(1)-O(2) bond lengths are 2.19 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Ba(1), two equivalent Ba(2), one Mg(1), one Y(1), and one Bi(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), one Y(1), and one Bi(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), one Y(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Ba(1), two equivalent Ba(2), one Mg(1), one Y(1), and one Bi(1) atom.