MgLa2ZnBiO6 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form distorted MgO4 tetrahedra that share corners with two equivalent La(2)O6 pentagonal pyramids, corners with two equivalent Zn(1)O4 trigonal pyramids, and  an edgeedge with one La(2)O6 pentagonal pyramid. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. In the second La site, La(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form distorted LaO6 pentagonal pyramids that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Zn(1)O4 trigonal pyramids,  an edgeedge with one Mg(1)O4 tetrahedra, and  an edgeedge with one Zn(1)O4 trigonal pyramid. Zn(1) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form distorted ZnO4 trigonal pyramids that share corners with two equivalent La(2)O6 pentagonal pyramids, corners with two equivalent Mg(1)O4 tetrahedra, and  an edgeedge with one La(2)O6 pentagonal pyramid. Bi(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded to one La(1), one La(2), one Zn(1), and one Bi(1) atom to form distorted OLa2ZnBi tetrahedra that share corners with three equivalent O(2)La2MgBi tetrahedra, corners with two equivalent O(6)La2MgZnBi trigonal bipyramids, corners with two equivalent O(3)La2ZnBi trigonal pyramids,  an edgeedge with one O(6)La2MgZnBi trigonal bipyramid, and  an edgeedge with one O(3)La2ZnBi trigonal pyramid. In the second O site, O(2) is bonded to one Mg(1), one La(1), one La(2), and one Bi(1) atom to form distorted OLa2MgBi tetrahedra that share corners with three equivalent O(1)La2ZnBi tetrahedra, corners with two equivalent O(6)La2MgZnBi trigonal bipyramids, corners with three equivalent O(3)La2ZnBi trigonal pyramids, and  an edgeedge with one O(6)La2MgZnBi trigonal bipyramid. In the third O site, O(3) is bonded to one La(1), one La(2), one Zn(1), and one Bi(1) atom to form distorted OLa2ZnBi trigonal pyramids that share corners with two equivalent O(1)La2ZnBi tetrahedra, corners with three equivalent O(2)La2MgBi tetrahedra, corners with two equivalent O(6)La2MgZnBi trigonal bipyramids,  an edgeedge with one O(1)La2ZnBi tetrahedra, and  an edgeedge with one O(6)La2MgZnBi trigonal bipyramid. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one La(1), one La(2), and one Zn(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one La(1), and one La(2) atom. In the sixth O site, O(6) is bonded to one Mg(1), one La(1), one La(2), one Zn(1), and one Bi(1) atom to form distorted OLa2MgZnBi trigonal bipyramids that share corners with two equivalent O(2)La2MgBi tetrahedra, corners with two equivalent O(1)La2ZnBi tetrahedra, corners with two equivalent O(3)La2ZnBi trigonal pyramids,  an edgeedge with one O(2)La2MgBi tetrahedra,  an edgeedge with one O(1)La2ZnBi tetrahedra, and  an edgeedge with one O(3)La2ZnBi trigonal pyramid.
MgLa2ZnBiO6 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form distorted MgO4 tetrahedra that share corners with two equivalent La(2)O6 pentagonal pyramids, corners with two equivalent Zn(1)O4 trigonal pyramids, and  an edgeedge with one La(2)O6 pentagonal pyramid. The Mg(1)-O(2) bond length is 1.98 Å. The Mg(1)-O(4) bond length is 1.98 Å. The Mg(1)-O(5) bond length is 2.01 Å. The Mg(1)-O(6) bond length is 2.14 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The La(1)-O(1) bond length is 2.67 Å. The La(1)-O(2) bond length is 2.42 Å. The La(1)-O(3) bond length is 2.27 Å. The La(1)-O(4) bond length is 2.43 Å. The La(1)-O(5) bond length is 2.34 Å. The La(1)-O(6) bond length is 2.87 Å. In the second La site, La(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form distorted LaO6 pentagonal pyramids that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Zn(1)O4 trigonal pyramids,  an edgeedge with one Mg(1)O4 tetrahedra, and  an edgeedge with one Zn(1)O4 trigonal pyramid. The La(2)-O(1) bond length is 2.46 Å. The La(2)-O(2) bond length is 2.66 Å. The La(2)-O(3) bond length is 2.53 Å. The La(2)-O(4) bond length is 2.39 Å. The La(2)-O(5) bond length is 2.25 Å. The La(2)-O(6) bond length is 2.55 Å. Zn(1) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form distorted ZnO4 trigonal pyramids that share corners with two equivalent La(2)O6 pentagonal pyramids, corners with two equivalent Mg(1)O4 tetrahedra, and  an edgeedge with one La(2)O6 pentagonal pyramid. The Zn(1)-O(1) bond length is 2.14 Å. The Zn(1)-O(3) bond length is 1.97 Å. The Zn(1)-O(4) bond length is 2.06 Å. The Zn(1)-O(6) bond length is 2.01 Å. Bi(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(6) atom. The Bi(1)-O(1) bond length is 2.20 Å. The Bi(1)-O(2) bond length is 2.33 Å. The Bi(1)-O(3) bond length is 2.67 Å. The Bi(1)-O(6) bond length is 2.65 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded to one La(1), one La(2), one Zn(1), and one Bi(1) atom to form distorted OLa2ZnBi tetrahedra that share corners with three equivalent O(2)La2MgBi tetrahedra, corners with two equivalent O(6)La2MgZnBi trigonal bipyramids, corners with two equivalent O(3)La2ZnBi trigonal pyramids,  an edgeedge with one O(6)La2MgZnBi trigonal bipyramid, and  an edgeedge with one O(3)La2ZnBi trigonal pyramid. In the second O site, O(2) is bonded to one Mg(1), one La(1), one La(2), and one Bi(1) atom to form distorted OLa2MgBi tetrahedra that share corners with three equivalent O(1)La2ZnBi tetrahedra, corners with two equivalent O(6)La2MgZnBi trigonal bipyramids, corners with three equivalent O(3)La2ZnBi trigonal pyramids, and  an edgeedge with one O(6)La2MgZnBi trigonal bipyramid. In the third O site, O(3) is bonded to one La(1), one La(2), one Zn(1), and one Bi(1) atom to form distorted OLa2ZnBi trigonal pyramids that share corners with two equivalent O(1)La2ZnBi tetrahedra, corners with three equivalent O(2)La2MgBi tetrahedra, corners with two equivalent O(6)La2MgZnBi trigonal bipyramids,  an edgeedge with one O(1)La2ZnBi tetrahedra, and  an edgeedge with one O(6)La2MgZnBi trigonal bipyramid. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one La(1), one La(2), and one Zn(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one La(1), and one La(2) atom. In the sixth O site, O(6) is bonded to one Mg(1), one La(1), one La(2), one Zn(1), and one Bi(1) atom to form distorted OLa2MgZnBi trigonal bipyramids that share corners with two equivalent O(2)La2MgBi tetrahedra, corners with two equivalent O(1)La2ZnBi tetrahedra, corners with two equivalent O(3)La2ZnBi trigonal pyramids,  an edgeedge with one O(2)La2MgBi tetrahedra,  an edgeedge with one O(1)La2ZnBi tetrahedra, and  an edgeedge with one O(3)La2ZnBi trigonal pyramid.