Ru7B3 crystallizes in the hexagonal P6_3mc space group. There are three inequivalent Ru sites. In the first Ru site, Ru(2) is bonded in a 3-coordinate geometry to three equivalent B(1) atoms. In the second Ru site, Ru(1) is bonded in a 3-coordinate geometry to three equivalent B(1) atoms. In the third Ru site, Ru(3) is bonded in a distorted water-like geometry to two equivalent B(1) atoms. B(1) is bonded in a 6-coordinate geometry to one Ru(2), two equivalent Ru(3), and three equivalent Ru(1) atoms.
Ru7B3 crystallizes in the hexagonal P6_3mc space group. There are three inequivalent Ru sites. In the first Ru site, Ru(2) is bonded in a 3-coordinate geometry to three equivalent B(1) atoms. All Ru(2)-B(1) bond lengths are 2.17 Å. In the second Ru site, Ru(1) is bonded in a 3-coordinate geometry to three equivalent B(1) atoms. There is one shorter (2.12 Å) and two longer (2.19 Å) Ru(1)-B(1) bond lengths. In the third Ru site, Ru(3) is bonded in a distorted water-like geometry to two equivalent B(1) atoms. Both Ru(3)-B(1) bond lengths are 2.14 Å. B(1) is bonded in a 6-coordinate geometry to one Ru(2), two equivalent Ru(3), and three equivalent Ru(1) atoms.