LuOsB4 crystallizes in the orthorhombic Pbam space group. Lu(1) is bonded in a 18-coordinate geometry to four equivalent Os(1), two equivalent B(4), four equivalent B(1), four equivalent B(2), and four equivalent B(3) atoms. Os(1) is bonded in a 15-coordinate geometry to four equivalent Lu(1), one Os(1), two equivalent B(1), two equivalent B(2), two equivalent B(3), and four equivalent B(4) atoms. There are four inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to four equivalent Lu(1), two equivalent Os(1), one B(4), and two equivalent B(2) atoms. In the second B site, B(2) is bonded in a 9-coordinate geometry to four equivalent Lu(1), two equivalent Os(1), one B(3), and two equivalent B(1) atoms. In the third B site, B(3) is bonded in a 9-coordinate geometry to four equivalent Lu(1), two equivalent Os(1), one B(2), one B(3), and one B(4) atom. In the fourth B site, B(4) is bonded in a 9-coordinate geometry to two equivalent Lu(1), four equivalent Os(1), one B(1), one B(3), and one B(4) atom.
LuOsB4 crystallizes in the orthorhombic Pbam space group. Lu(1) is bonded in a 18-coordinate geometry to four equivalent Os(1), two equivalent B(4), four equivalent B(1), four equivalent B(2), and four equivalent B(3) atoms. There are a spread of Lu(1)-Os(1) bond distances ranging from 2.92-3.10 Å. Both Lu(1)-B(4) bond lengths are 2.60 Å. There are two shorter (2.67 Å) and two longer (2.75 Å) Lu(1)-B(1) bond lengths. There are two shorter (2.69 Å) and two longer (2.74 Å) Lu(1)-B(2) bond lengths. There are two shorter (2.70 Å) and two longer (2.73 Å) Lu(1)-B(3) bond lengths. Os(1) is bonded in a 15-coordinate geometry to four equivalent Lu(1), one Os(1), two equivalent B(1), two equivalent B(2), two equivalent B(3), and four equivalent B(4) atoms. The Os(1)-Os(1) bond length is 2.73 Å. Both Os(1)-B(1) bond lengths are 2.31 Å. Both Os(1)-B(2) bond lengths are 2.23 Å. Both Os(1)-B(3) bond lengths are 2.32 Å. There are two shorter (2.38 Å) and two longer (2.40 Å) Os(1)-B(4) bond lengths. There are four inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to four equivalent Lu(1), two equivalent Os(1), one B(4), and two equivalent B(2) atoms. The B(1)-B(4) bond length is 1.73 Å. There is one shorter (1.76 Å) and one longer (1.87 Å) B(1)-B(2) bond length. In the second B site, B(2) is bonded in a 9-coordinate geometry to four equivalent Lu(1), two equivalent Os(1), one B(3), and two equivalent B(1) atoms. The B(2)-B(3) bond length is 1.84 Å. In the third B site, B(3) is bonded in a 9-coordinate geometry to four equivalent Lu(1), two equivalent Os(1), one B(2), one B(3), and one B(4) atom. The B(3)-B(3) bond length is 1.73 Å. The B(3)-B(4) bond length is 1.73 Å. In the fourth B site, B(4) is bonded in a 9-coordinate geometry to two equivalent Lu(1), four equivalent Os(1), one B(1), one B(3), and one B(4) atom. The B(4)-B(4) bond length is 1.72 Å.