MgEu6WO12 crystallizes in the trigonal R-3 space group. Mg(1) is bonded in an octahedral geometry to six equivalent O(2) atoms. Eu(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(2) atoms. W(1) is bonded in an octahedral geometry to six equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Eu(1) and one W(1) atom to form a mixture of distorted edge and corner-sharing OEu3W trigonal pyramids. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Mg(1) and three equivalent Eu(1) atoms.
MgEu6WO12 crystallizes in the trigonal R-3 space group. Mg(1) is bonded in an octahedral geometry to six equivalent O(2) atoms. All Mg(1)-O(2) bond lengths are 2.13 Å. Eu(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(2) atoms. There are a spread of Eu(1)-O(1) bond distances ranging from 2.44-2.55 Å. There is one shorter (2.31 Å) and two longer (2.34 Å) Eu(1)-O(2) bond lengths. W(1) is bonded in an octahedral geometry to six equivalent O(1) atoms. All W(1)-O(1) bond lengths are 1.97 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Eu(1) and one W(1) atom to form a mixture of distorted edge and corner-sharing OEu3W trigonal pyramids. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Mg(1) and three equivalent Eu(1) atoms.