EuSeO3 is Potassium chlorate structured and crystallizes in the monoclinic P2_1/m space group. Eu(1) is bonded in a 9-coordinate geometry to three equivalent O(1) and six equivalent O(2) atoms. Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to three equivalent Eu(1) and one Se(1) atom. In the second O site, O(2) is bonded to three equivalent Eu(1) and one Se(1) atom to form a mixture of distorted edge and corner-sharing OEu3Se tetrahedra.
EuSeO3 is Potassium chlorate structured and crystallizes in the monoclinic P2_1/m space group. Eu(1) is bonded in a 9-coordinate geometry to three equivalent O(1) and six equivalent O(2) atoms. There is one shorter (2.64 Å) and two longer (2.97 Å) Eu(1)-O(1) bond lengths. There are a spread of Eu(1)-O(2) bond distances ranging from 2.60-2.66 Å. Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1) and two equivalent O(2) atoms. The Se(1)-O(1) bond length is 1.71 Å. Both Se(1)-O(2) bond lengths are 1.72 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to three equivalent Eu(1) and one Se(1) atom. In the second O site, O(2) is bonded to three equivalent Eu(1) and one Se(1) atom to form a mixture of distorted edge and corner-sharing OEu3Se tetrahedra.