MnB4 crystallizes in the orthorhombic Immm space group. Mn(1) is bonded to twelve equivalent B(1) atoms to form a mixture of face and edge-sharing MnB12 cuboctahedra. B(1) is bonded in a 7-coordinate geometry to three equivalent Mn(1) and four equivalent B(1) atoms.
MnB4 crystallizes in the orthorhombic Immm space group. Mn(1) is bonded to twelve equivalent B(1) atoms to form a mixture of face and edge-sharing MnB12 cuboctahedra. There are four shorter (2.05 Å) and eight longer (2.19 Å) Mn(1)-B(1) bond lengths. B(1) is bonded in a 7-coordinate geometry to three equivalent Mn(1) and four equivalent B(1) atoms. There are a spread of B(1)-B(1) bond distances ranging from 1.70-1.88 Å.