Ba2SrMgWO6 crystallizes in the monoclinic C2/m space group. Ba(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. Sr(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share faces with two equivalent W(1)O6 octahedra. W(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form WO6 octahedra that share faces with two equivalent Mg(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ba(1), one Sr(1), one Mg(1), and one W(1) atom to form a mixture of distorted edge, face, and corner-sharing OBa2SrMgW trigonal bipyramids. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Ba(1), one Mg(1), and one W(1) atom.
Ba2SrMgWO6 crystallizes in the monoclinic C2/m space group. Ba(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. The Ba(1)-O(2) bond length is 2.63 Å. There are two shorter (2.72 Å) and two longer (2.73 Å) Ba(1)-O(1) bond lengths. Sr(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. All Sr(1)-O(1) bond lengths are 2.41 Å. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share faces with two equivalent W(1)O6 octahedra. Both Mg(1)-O(2) bond lengths are 2.20 Å. All Mg(1)-O(1) bond lengths are 2.16 Å. W(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form WO6 octahedra that share faces with two equivalent Mg(1)O6 octahedra. Both W(1)-O(2) bond lengths are 2.07 Å. All W(1)-O(1) bond lengths are 2.15 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ba(1), one Sr(1), one Mg(1), and one W(1) atom to form a mixture of distorted edge, face, and corner-sharing OBa2SrMgW trigonal bipyramids. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Ba(1), one Mg(1), and one W(1) atom.