K4MnBr6 crystallizes in the trigonal R-3c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to six equivalent Br(1) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to eight equivalent Br(1) atoms. Mn(1) is bonded in an octahedral geometry to six equivalent Br(1) atoms. Br(1) is bonded to one K(1), four equivalent K(2), and one Mn(1) atom to form a mixture of distorted edge, corner, and face-sharing BrK5Mn octahedra. The corner-sharing octahedral tilt angles range from 0-64°.
K4MnBr6 crystallizes in the trigonal R-3c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to six equivalent Br(1) atoms. All K(1)-Br(1) bond lengths are 3.22 Å. In the second K site, K(2) is bonded in a 8-coordinate geometry to eight equivalent Br(1) atoms. There are a spread of K(2)-Br(1) bond distances ranging from 3.36-3.52 Å. Mn(1) is bonded in an octahedral geometry to six equivalent Br(1) atoms. All Mn(1)-Br(1) bond lengths are 2.72 Å. Br(1) is bonded to one K(1), four equivalent K(2), and one Mn(1) atom to form a mixture of distorted edge, corner, and face-sharing BrK5Mn octahedra. The corner-sharing octahedral tilt angles range from 0-64°.