MoRu2B4 crystallizes in the orthorhombic Immm space group. Mo(1) is bonded in a 12-coordinate geometry to four equivalent B(1) and eight equivalent B(2) atoms. Ru(1) is bonded in a 7-coordinate geometry to two equivalent B(2) and five equivalent B(1) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to two equivalent Mo(1), five equivalent Ru(1), and two equivalent B(2) atoms. In the second B site, B(2) is bonded in a 9-coordinate geometry to four equivalent Mo(1), two equivalent Ru(1), one B(2), and two equivalent B(1) atoms.
MoRu2B4 crystallizes in the orthorhombic Immm space group. Mo(1) is bonded in a 12-coordinate geometry to four equivalent B(1) and eight equivalent B(2) atoms. All Mo(1)-B(1) bond lengths are 2.55 Å. All Mo(1)-B(2) bond lengths are 2.42 Å. Ru(1) is bonded in a 7-coordinate geometry to two equivalent B(2) and five equivalent B(1) atoms. Both Ru(1)-B(2) bond lengths are 2.21 Å. There are four shorter (2.28 Å) and one longer (2.29 Å) Ru(1)-B(1) bond length. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to two equivalent Mo(1), five equivalent Ru(1), and two equivalent B(2) atoms. Both B(1)-B(2) bond lengths are 1.82 Å. In the second B site, B(2) is bonded in a 9-coordinate geometry to four equivalent Mo(1), two equivalent Ru(1), one B(2), and two equivalent B(1) atoms. The B(2)-B(2) bond length is 1.85 Å.