Mg2Rh5B2Ge crystallizes in the tetragonal P4/mbm space group. Mg(1) is bonded in a 15-coordinate geometry to two equivalent Mg(1), two equivalent Rh(2), eight equivalent Rh(1), and three equivalent B(1) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 8-coordinate geometry to four equivalent Mg(1), two equivalent B(1), and two equivalent Ge(1) atoms. In the second Rh site, Rh(2) is bonded in a distorted body-centered cubic geometry to four equivalent Mg(1) and four equivalent B(1) atoms. B(1) is bonded in a 9-coordinate geometry to three equivalent Mg(1), two equivalent Rh(2), and four equivalent Rh(1) atoms. Ge(1) is bonded in a body-centered cubic geometry to eight equivalent Rh(1) atoms.
Mg2Rh5B2Ge crystallizes in the tetragonal P4/mbm space group. Mg(1) is bonded in a 15-coordinate geometry to two equivalent Mg(1), two equivalent Rh(2), eight equivalent Rh(1), and three equivalent B(1) atoms. Both Mg(1)-Mg(1) bond lengths are 2.94 Å. Both Mg(1)-Rh(2) bond lengths are 2.75 Å. There are four shorter (2.83 Å) and four longer (2.94 Å) Mg(1)-Rh(1) bond lengths. There is one shorter (2.67 Å) and two longer (2.86 Å) Mg(1)-B(1) bond lengths. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 8-coordinate geometry to four equivalent Mg(1), two equivalent B(1), and two equivalent Ge(1) atoms. Both Rh(1)-B(1) bond lengths are 2.17 Å. Both Rh(1)-Ge(1) bond lengths are 2.58 Å. In the second Rh site, Rh(2) is bonded in a distorted body-centered cubic geometry to four equivalent Mg(1) and four equivalent B(1) atoms. All Rh(2)-B(1) bond lengths are 2.22 Å. B(1) is bonded in a 9-coordinate geometry to three equivalent Mg(1), two equivalent Rh(2), and four equivalent Rh(1) atoms. Ge(1) is bonded in a body-centered cubic geometry to eight equivalent Rh(1) atoms.