Mn3Cu4Bi4 crystallizes in the cubic Fm-3m space group. Mn(1) is bonded in a distorted q6 geometry to four equivalent Cu(1), two equivalent Bi(2), and four equivalent Bi(1) atoms. Cu(1) is bonded in a 10-coordinate geometry to three equivalent Mn(1), three equivalent Cu(1), one Bi(2), and three equivalent Bi(1) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 8-coordinate geometry to four equivalent Mn(1) and four equivalent Cu(1) atoms. In the second Bi site, Bi(2) is bonded in a distorted q6 geometry to six equivalent Mn(1) and four equivalent Cu(1) atoms.
Mn3Cu4Bi4 crystallizes in the cubic Fm-3m space group. Mn(1) is bonded in a distorted q6 geometry to four equivalent Cu(1), two equivalent Bi(2), and four equivalent Bi(1) atoms. All Mn(1)-Cu(1) bond lengths are 2.73 Å. Both Mn(1)-Bi(2) bond lengths are 3.01 Å. All Mn(1)-Bi(1) bond lengths are 3.04 Å. Cu(1) is bonded in a 10-coordinate geometry to three equivalent Mn(1), three equivalent Cu(1), one Bi(2), and three equivalent Bi(1) atoms. All Cu(1)-Cu(1) bond lengths are 2.65 Å. The Cu(1)-Bi(2) bond length is 2.93 Å. All Cu(1)-Bi(1) bond lengths are 2.82 Å. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 8-coordinate geometry to four equivalent Mn(1) and four equivalent Cu(1) atoms. In the second Bi site, Bi(2) is bonded in a distorted q6 geometry to six equivalent Mn(1) and four equivalent Cu(1) atoms.