RbAuI3 crystallizes in the monoclinic C2/m space group. Rb(1) is bonded in a 9-coordinate geometry to three equivalent I(1) and six equivalent I(2) atoms. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a square co-planar geometry to four equivalent I(2) atoms. In the second Au site, Au(2) is bonded in a distorted octahedral geometry to two equivalent I(1) and four equivalent I(2) atoms. There are two inequivalent I sites. In the first I site, I(1) is bonded to three equivalent Rb(1) and one Au(2) atom to form distorted IRb3Au trigonal pyramids that share corners with fourteen equivalent I(2)Rb3Au2 square pyramids, corners with three equivalent I(1)Rb3Au trigonal pyramids, edges with four equivalent I(2)Rb3Au2 square pyramids, and edges with two equivalent I(1)Rb3Au trigonal pyramids. In the second I site, I(2) is bonded to three equivalent Rb(1), one Au(1), and one Au(2) atom to form distorted IRb3Au2 square pyramids that share corners with nine equivalent I(2)Rb3Au2 square pyramids, corners with seven equivalent I(1)Rb3Au trigonal pyramids, edges with three equivalent I(2)Rb3Au2 square pyramids, edges with two equivalent I(1)Rb3Au trigonal pyramids, and faces with two equivalent I(2)Rb3Au2 square pyramids.
RbAuI3 crystallizes in the monoclinic C2/m space group. Rb(1) is bonded in a 9-coordinate geometry to three equivalent I(1) and six equivalent I(2) atoms. There is one shorter (3.76 Å) and two longer (4.13 Å) Rb(1)-I(1) bond lengths. There are a spread of Rb(1)-I(2) bond distances ranging from 3.89-4.03 Å. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a square co-planar geometry to four equivalent I(2) atoms. All Au(1)-I(2) bond lengths are 2.68 Å. In the second Au site, Au(2) is bonded in a distorted octahedral geometry to two equivalent I(1) and four equivalent I(2) atoms. Both Au(2)-I(1) bond lengths are 2.59 Å. All Au(2)-I(2) bond lengths are 3.34 Å. There are two inequivalent I sites. In the first I site, I(1) is bonded to three equivalent Rb(1) and one Au(2) atom to form distorted IRb3Au trigonal pyramids that share corners with fourteen equivalent I(2)Rb3Au2 square pyramids, corners with three equivalent I(1)Rb3Au trigonal pyramids, edges with four equivalent I(2)Rb3Au2 square pyramids, and edges with two equivalent I(1)Rb3Au trigonal pyramids. In the second I site, I(2) is bonded to three equivalent Rb(1), one Au(1), and one Au(2) atom to form distorted IRb3Au2 square pyramids that share corners with nine equivalent I(2)Rb3Au2 square pyramids, corners with seven equivalent I(1)Rb3Au trigonal pyramids, edges with three equivalent I(2)Rb3Au2 square pyramids, edges with two equivalent I(1)Rb3Au trigonal pyramids, and faces with two equivalent I(2)Rb3Au2 square pyramids.