Sm2(ReB2)3 is Magnesium tetraboride-derived structured and crystallizes in the monoclinic C2/c space group. Sm(1) is bonded in a 9-coordinate geometry to three equivalent B(1), three equivalent B(3), and four equivalent B(2) atoms. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded in a 6-coordinate geometry to one B(3), two equivalent B(2), and three equivalent B(1) atoms. In the second Re site, Re(2) is bonded in a 8-coordinate geometry to two equivalent B(1), two equivalent B(2), and four equivalent B(3) atoms. There are three inequivalent B sites. In the first B site, B(1) is bonded in a 8-coordinate geometry to three equivalent Sm(1), one Re(2), three equivalent Re(1), and one B(3) atom. In the second B site, B(2) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Re(2), two equivalent Re(1), one B(2), and one B(3) atom. In the third B site, B(3) is bonded in a 9-coordinate geometry to three equivalent Sm(1), one Re(1), two equivalent Re(2), one B(1), one B(2), and one B(3) atom.
Sm2(ReB2)3 is Magnesium tetraboride-derived structured and crystallizes in the monoclinic C2/c space group. Sm(1) is bonded in a 9-coordinate geometry to three equivalent B(1), three equivalent B(3), and four equivalent B(2) atoms. There are a spread of Sm(1)-B(1) bond distances ranging from 2.73-2.97 Å. There are a spread of Sm(1)-B(3) bond distances ranging from 2.72-2.92 Å. There are a spread of Sm(1)-B(2) bond distances ranging from 2.74-3.19 Å. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded in a 6-coordinate geometry to one B(3), two equivalent B(2), and three equivalent B(1) atoms. The Re(1)-B(3) bond length is 2.23 Å. There is one shorter (2.21 Å) and one longer (2.29 Å) Re(1)-B(2) bond length. There are a spread of Re(1)-B(1) bond distances ranging from 2.11-2.29 Å. In the second Re site, Re(2) is bonded in a 8-coordinate geometry to two equivalent B(1), two equivalent B(2), and four equivalent B(3) atoms. Both Re(2)-B(1) bond lengths are 2.26 Å. Both Re(2)-B(2) bond lengths are 2.37 Å. There are two shorter (2.24 Å) and two longer (2.31 Å) Re(2)-B(3) bond lengths. There are three inequivalent B sites. In the first B site, B(1) is bonded in a 8-coordinate geometry to three equivalent Sm(1), one Re(2), three equivalent Re(1), and one B(3) atom. The B(1)-B(3) bond length is 1.83 Å. In the second B site, B(2) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Re(2), two equivalent Re(1), one B(2), and one B(3) atom. The B(2)-B(2) bond length is 1.87 Å. The B(2)-B(3) bond length is 1.82 Å. In the third B site, B(3) is bonded in a 9-coordinate geometry to three equivalent Sm(1), one Re(1), two equivalent Re(2), one B(1), one B(2), and one B(3) atom. The B(3)-B(3) bond length is 1.80 Å.