Eu(CuSb)2 crystallizes in the tetragonal P4/nmm space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Cu(2), four equivalent Sb(1), and four equivalent Sb(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 8-coordinate geometry to four equivalent Eu(1) and four equivalent Sb(2) atoms. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Sb(2), and four equivalent Sb(1) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to four equivalent Eu(1) and four equivalent Cu(2) atoms to form a mixture of distorted edge and face-sharing SbEu4Cu4 tetrahedra. In the second Sb site, Sb(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Cu(2), and four equivalent Cu(1) atoms.
Eu(CuSb)2 crystallizes in the tetragonal P4/nmm space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Cu(2), four equivalent Sb(1), and four equivalent Sb(2) atoms. All Eu(1)-Cu(1) bond lengths are 3.39 Å. All Eu(1)-Cu(2) bond lengths are 3.49 Å. All Eu(1)-Sb(1) bond lengths are 3.60 Å. All Eu(1)-Sb(2) bond lengths are 3.40 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 8-coordinate geometry to four equivalent Eu(1) and four equivalent Sb(2) atoms. All Cu(1)-Sb(2) bond lengths are 2.65 Å. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Sb(2), and four equivalent Sb(1) atoms. The Cu(2)-Sb(2) bond length is 2.53 Å. All Cu(2)-Sb(1) bond lengths are 2.67 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to four equivalent Eu(1) and four equivalent Cu(2) atoms to form a mixture of distorted edge and face-sharing SbEu4Cu4 tetrahedra. In the second Sb site, Sb(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Cu(2), and four equivalent Cu(1) atoms.