Sr5(Rh7B5)2 crystallizes in the orthorhombic Fmmm space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 19-coordinate geometry to one Sr(2), two equivalent Rh(4), four equivalent Rh(1), four equivalent Rh(2), and eight equivalent B(1) atoms. In the second Sr site, Sr(2) is bonded in a 20-coordinate geometry to one Sr(1), one Sr(3), two equivalent Rh(4), two equivalent Rh(5), four equivalent Rh(2), four equivalent Rh(3), and six equivalent B(2) atoms. In the third Sr site, Sr(3) is bonded in a 20-coordinate geometry to two equivalent Sr(2), four equivalent Rh(5), eight equivalent Rh(3), and six equivalent B(3) atoms. There are five inequivalent Rh sites. In the first Rh site, Rh(3) is bonded in a distorted square co-planar geometry to two equivalent Sr(2), two equivalent Sr(3), two equivalent B(2), and two equivalent B(3) atoms. In the second Rh site, Rh(4) is bonded in a 4-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), two equivalent B(1), and two equivalent B(2) atoms. In the third Rh site, Rh(5) is bonded in a distorted square co-planar geometry to two equivalent Sr(2); two equivalent Sr(3); two equivalent B(2); and two B(3,3) atoms. In the fourth Rh site, Rh(1) is bonded in a 4-coordinate geometry to four equivalent Sr(1) and four equivalent B(1) atoms. In the fifth Rh site, Rh(2) is bonded in a distorted square co-planar geometry to two equivalent Sr(1), two equivalent Sr(2), two equivalent B(1), and two equivalent B(2) atoms. There are four inequivalent B sites. In the first B site, B(3) is bonded in a 6-coordinate geometry to three equivalent Sr(3), two equivalent Rh(5), and four equivalent Rh(3) atoms. In the second B site, B(1) is bonded in a 5-coordinate geometry to four equivalent Sr(1), one Rh(4), two equivalent Rh(1), and two equivalent Rh(2) atoms. In the third B site, B(2) is bonded in a 6-coordinate geometry to three equivalent Sr(2), one Rh(4), one Rh(5), two equivalent Rh(2), and two equivalent Rh(3) atoms. In the fourth B site, B(3) is bonded in a 6-coordinate geometry to three equivalent Sr(3), two equivalent Rh(5), and four equivalent Rh(3) atoms.
Sr5(Rh7B5)2 crystallizes in the orthorhombic Fmmm space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 19-coordinate geometry to one Sr(2), two equivalent Rh(4), four equivalent Rh(1), four equivalent Rh(2), and eight equivalent B(1) atoms. The Sr(1)-Sr(2) bond length is 3.08 Å. Both Sr(1)-Rh(4) bond lengths are 3.27 Å. All Sr(1)-Rh(1) bond lengths are 3.06 Å. All Sr(1)-Rh(2) bond lengths are 3.32 Å. There are a spread of Sr(1)-B(1) bond distances ranging from 3.00-3.32 Å. In the second Sr site, Sr(2) is bonded in a 20-coordinate geometry to one Sr(1), one Sr(3), two equivalent Rh(4), two equivalent Rh(5), four equivalent Rh(2), four equivalent Rh(3), and six equivalent B(2) atoms. The Sr(2)-Sr(3) bond length is 3.01 Å. Both Sr(2)-Rh(4) bond lengths are 3.13 Å. Both Sr(2)-Rh(5) bond lengths are 3.21 Å. All Sr(2)-Rh(2) bond lengths are 3.15 Å. All Sr(2)-Rh(3) bond lengths are 3.24 Å. There are four shorter (3.25 Å) and two longer (3.31 Å) Sr(2)-B(2) bond lengths. In the third Sr site, Sr(3) is bonded in a 20-coordinate geometry to two equivalent Sr(2), four equivalent Rh(5), eight equivalent Rh(3), and six equivalent B(3) atoms. All Sr(3)-Rh(5) bond lengths are 3.16 Å. All Sr(3)-Rh(3) bond lengths are 3.20 Å. There are four shorter (3.25 Å) and two longer (3.30 Å) Sr(3)-B(3) bond lengths. There are five inequivalent Rh sites. In the first Rh site, Rh(3) is bonded in a distorted square co-planar geometry to two equivalent Sr(2), two equivalent Sr(3), two equivalent B(2), and two equivalent B(3) atoms. Both Rh(3)-B(2) bond lengths are 2.19 Å. Both Rh(3)-B(3) bond lengths are 2.19 Å. In the second Rh site, Rh(4) is bonded in a 4-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), two equivalent B(1), and two equivalent B(2) atoms. Both Rh(4)-B(1) bond lengths are 2.16 Å. Both Rh(4)-B(2) bond lengths are 2.21 Å. In the third Rh site, Rh(5) is bonded in a distorted square co-planar geometry to two equivalent Sr(2); two equivalent Sr(3); two equivalent B(2); and two B(3,3) atoms. Both Rh(5)-B(2) bond lengths are 2.19 Å. Both Rh(5)-B(3,3) bond lengths are 2.20 Å. In the fourth Rh site, Rh(1) is bonded in a 4-coordinate geometry to four equivalent Sr(1) and four equivalent B(1) atoms. All Rh(1)-B(1) bond lengths are 2.15 Å. In the fifth Rh site, Rh(2) is bonded in a distorted square co-planar geometry to two equivalent Sr(1), two equivalent Sr(2), two equivalent B(1), and two equivalent B(2) atoms. Both Rh(2)-B(1) bond lengths are 2.18 Å. Both Rh(2)-B(2) bond lengths are 2.19 Å. There are four inequivalent B sites. In the first B site, B(3) is bonded in a 6-coordinate geometry to three equivalent Sr(3), two equivalent Rh(5), and four equivalent Rh(3) atoms. There are two shorter (3.25 Å) and one longer (3.30 Å) B(3)-Sr(3) bond length. All B(3)-Rh(3) bond lengths are 2.19 Å. In the second B site, B(1) is bonded in a 5-coordinate geometry to four equivalent Sr(1), one Rh(4), two equivalent Rh(1), and two equivalent Rh(2) atoms. In the third B site, B(2) is bonded in a 6-coordinate geometry to three equivalent Sr(2), one Rh(4), one Rh(5), two equivalent Rh(2), and two equivalent Rh(3) atoms. In the fourth B site, B(3) is bonded in a 6-coordinate geometry to three equivalent Sr(3), two equivalent Rh(5), and four equivalent Rh(3) atoms.