BaZn(SeO3)2 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form distorted BaO6 octahedra that share corners with two equivalent Ba(1)O6 octahedra and corners with three equivalent Zn(1)O4 trigonal pyramids. The corner-sharing octahedral tilt angles are 58°. Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form ZnO4 trigonal pyramids that share corners with three equivalent Ba(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-64°. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(3), one O(5), and one O(6) atom. In the second Se site, Se(2) is bonded in a water-like geometry to one O(1) and one O(4) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ba(1), one Zn(1), and one Se(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ba(1), one Zn(1), and one O(6) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ba(1), one Zn(1), and one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1) and one Se(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Ba(1) and one Se(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one Se(1), and one O(2) atom.
BaZn(SeO3)2 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form distorted BaO6 octahedra that share corners with two equivalent Ba(1)O6 octahedra and corners with three equivalent Zn(1)O4 trigonal pyramids. The corner-sharing octahedral tilt angles are 58°. The Ba(1)-O(1) bond length is 2.65 Å. The Ba(1)-O(2) bond length is 2.71 Å. The Ba(1)-O(3) bond length is 2.98 Å. The Ba(1)-O(5) bond length is 2.73 Å. There is one shorter (2.79 Å) and one longer (2.88 Å) Ba(1)-O(4) bond length. Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form ZnO4 trigonal pyramids that share corners with three equivalent Ba(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-64°. The Zn(1)-O(1) bond length is 1.90 Å. The Zn(1)-O(2) bond length is 1.99 Å. The Zn(1)-O(3) bond length is 1.96 Å. The Zn(1)-O(6) bond length is 2.09 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(3), one O(5), and one O(6) atom. The Se(1)-O(3) bond length is 1.75 Å. The Se(1)-O(5) bond length is 1.67 Å. The Se(1)-O(6) bond length is 2.12 Å. In the second Se site, Se(2) is bonded in a water-like geometry to one O(1) and one O(4) atom. The Se(2)-O(1) bond length is 1.82 Å. The Se(2)-O(4) bond length is 1.76 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ba(1), one Zn(1), and one Se(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ba(1), one Zn(1), and one O(6) atom. The O(2)-O(6) bond length is 1.45 Å. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ba(1), one Zn(1), and one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1) and one Se(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Ba(1) and one Se(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one Se(1), and one O(2) atom.