MgEu2Se4 crystallizes in the tetragonal I-42d space group. Mg(1) is bonded in a square co-planar geometry to four equivalent Se(1) atoms. Eu(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. Se(1) is bonded to one Mg(1) and four equivalent Eu(1) atoms to form a mixture of distorted face, corner, and edge-sharing SeEu4Mg trigonal bipyramids.
MgEu2Se4 crystallizes in the tetragonal I-42d space group. Mg(1) is bonded in a square co-planar geometry to four equivalent Se(1) atoms. All Mg(1)-Se(1) bond lengths are 2.71 Å. Eu(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. There are a spread of Eu(1)-Se(1) bond distances ranging from 2.95-3.23 Å. Se(1) is bonded to one Mg(1) and four equivalent Eu(1) atoms to form a mixture of distorted face, corner, and edge-sharing SeEu4Mg trigonal bipyramids.