BaZn(SeO3)2 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 11-coordinate geometry to one O(4), one O(6), two equivalent O(1), two equivalent O(3), two equivalent O(5), and three equivalent O(2) atoms. Zn(1) is bonded in a tetrahedral geometry to one O(1), one O(3), one O(4), and one O(6) atom. 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(1), one O(2), and one O(3) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Ba(1) and one Se(2) atom. In the second O site, O(6) is bonded in a bent 120 degrees geometry to one Ba(1), one Zn(1), and one Se(2) atom. In the third O site, O(1) is bonded to two equivalent Ba(1), one Zn(1), and one Se(1) atom to form distorted corner-sharing OBa2ZnSe tetrahedra. In the fourth O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Ba(1) and one Se(1) atom. In the fifth O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Zn(1), and one Se(1) atom. In the sixth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Zn(1), and one Se(2) atom.
BaZn(SeO3)2 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 11-coordinate geometry to one O(4), one O(6), two equivalent O(1), two equivalent O(3), two equivalent O(5), and three equivalent O(2) atoms. The Ba(1)-O(4) bond length is 2.85 Å. The Ba(1)-O(6) bond length is 3.41 Å. There is one shorter (2.88 Å) and one longer (2.91 Å) Ba(1)-O(1) bond length. There is one shorter (3.01 Å) and one longer (3.09 Å) Ba(1)-O(3) bond length. Both Ba(1)-O(5) bond lengths are 2.86 Å. There are a spread of Ba(1)-O(2) bond distances ranging from 2.91-3.24 Å. Zn(1) is bonded in a tetrahedral geometry to one O(1), one O(3), one O(4), and one O(6) atom. The Zn(1)-O(1) bond length is 2.02 Å. The Zn(1)-O(3) bond length is 2.01 Å. The Zn(1)-O(4) bond length is 1.99 Å. The Zn(1)-O(6) bond length is 1.97 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(1), one O(2), and one O(3) atom. The Se(1)-O(1) bond length is 1.75 Å. The Se(1)-O(2) bond length is 1.69 Å. The Se(1)-O(3) bond length is 1.75 Å. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(5), and one O(6) atom. The Se(2)-O(4) bond length is 1.74 Å. The Se(2)-O(5) bond length is 1.69 Å. The Se(2)-O(6) bond length is 1.75 Å. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Ba(1) and one Se(2) atom. In the second O site, O(6) is bonded in a bent 120 degrees geometry to one Ba(1), one Zn(1), and one Se(2) atom. In the third O site, O(1) is bonded to two equivalent Ba(1), one Zn(1), and one Se(1) atom to form distorted corner-sharing OBa2ZnSe tetrahedra. In the fourth O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Ba(1) and one Se(1) atom. In the fifth O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Zn(1), and one Se(1) atom. In the sixth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Zn(1), and one Se(2) atom.