RbCu2Br3 crystallizes in the orthorhombic Cmcm space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent Br(2) and six equivalent Br(1) atoms. Cu(1) is bonded to two equivalent Br(1) and two equivalent Br(2) atoms to form a mixture of distorted edge and corner-sharing CuBr4 tetrahedra. There are two inequivalent Br sites. In the first Br site, Br(2) is bonded in a 6-coordinate geometry to two equivalent Rb(1) and four equivalent Cu(1) atoms. In the second Br site, Br(1) is bonded in a 5-coordinate geometry to three equivalent Rb(1) and two equivalent Cu(1) atoms.
RbCu2Br3 crystallizes in the orthorhombic Cmcm space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent Br(2) and six equivalent Br(1) atoms. Both Rb(1)-Br(2) bond lengths are 3.58 Å. There are four shorter (3.49 Å) and two longer (3.67 Å) Rb(1)-Br(1) bond lengths. Cu(1) is bonded to two equivalent Br(1) and two equivalent Br(2) atoms to form a mixture of distorted edge and corner-sharing CuBr4 tetrahedra. Both Cu(1)-Br(1) bond lengths are 2.42 Å. Both Cu(1)-Br(2) bond lengths are 2.58 Å. There are two inequivalent Br sites. In the first Br site, Br(2) is bonded in a 6-coordinate geometry to two equivalent Rb(1) and four equivalent Cu(1) atoms. In the second Br site, Br(1) is bonded in a 5-coordinate geometry to three equivalent Rb(1) and two equivalent Cu(1) atoms.