Dy(Mo3Se4)2 crystallizes in the trigonal R-3 space group. Dy(1) is bonded in a body-centered cubic geometry to two equivalent Se(1) and six equivalent Se(2) atoms. Mo(1) is bonded in a 5-coordinate geometry to one Se(1) and four equivalent Se(2) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 4-coordinate geometry to one Dy(1) and three equivalent Mo(1) atoms. In the second Se site, Se(2) is bonded in a 5-coordinate geometry to one Dy(1) and four equivalent Mo(1) atoms.
Dy(Mo3Se4)2 crystallizes in the trigonal R-3 space group. Dy(1) is bonded in a body-centered cubic geometry to two equivalent Se(1) and six equivalent Se(2) atoms. Both Dy(1)-Se(1) bond lengths are 2.81 Å. All Dy(1)-Se(2) bond lengths are 3.11 Å. Mo(1) is bonded in a 5-coordinate geometry to one Se(1) and four equivalent Se(2) atoms. The Mo(1)-Se(1) bond length is 2.54 Å. There are a spread of Mo(1)-Se(2) bond distances ranging from 2.59-2.75 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 4-coordinate geometry to one Dy(1) and three equivalent Mo(1) atoms. In the second Se site, Se(2) is bonded in a 5-coordinate geometry to one Dy(1) and four equivalent Mo(1) atoms.