MgO6SeO3 crystallizes in the trigonal R3 space group. The structure consists of three SeO3 clusters inside a MgO6 framework. In each SeO3 cluster, Se(1) is bonded in a trigonal non-coplanar geometry to three equivalent O(1) atoms. O(1) is bonded in a single-bond geometry to one Se(1) atom. In the MgO6 framework, Mg(1) is bonded in an octahedral geometry to three equivalent O(2) and three equivalent O(3) atoms. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one O(3) atom. In the second O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one O(2) atom.
MgO6SeO3 crystallizes in the trigonal R3 space group. The structure consists of three SeO3 clusters inside a MgO6 framework. In each SeO3 cluster, Se(1) is bonded in a trigonal non-coplanar geometry to three equivalent O(1) atoms. All Se(1)-O(1) bond lengths are 1.64 Å. O(1) is bonded in a single-bond geometry to one Se(1) atom. In the MgO6 framework, Mg(1) is bonded in an octahedral geometry to three equivalent O(2) and three equivalent O(3) atoms. All Mg(1)-O(2) bond lengths are 2.19 Å. All Mg(1)-O(3) bond lengths are 2.20 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one O(3) atom. The O(2)-O(3) bond length is 1.27 Å. In the second O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one O(2) atom.