RbPrSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Rb(1) is bonded to six equivalent Se(1) atoms to form distorted RbSe6 octahedra that share corners with six equivalent Pr(1)Se6 octahedra, edges with six equivalent Rb(1)Se6 octahedra, and edges with six equivalent Pr(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 10°. Pr(1) is bonded to six equivalent Se(1) atoms to form PrSe6 octahedra that share corners with six equivalent Rb(1)Se6 octahedra, edges with six equivalent Rb(1)Se6 octahedra, and edges with six equivalent Pr(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 10°. Se(1) is bonded to three equivalent Rb(1) and three equivalent Pr(1) atoms to form a mixture of corner and edge-sharing SeRb3Pr3 octahedra. The corner-sharing octahedra are not tilted.
RbPrSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Rb(1) is bonded to six equivalent Se(1) atoms to form distorted RbSe6 octahedra that share corners with six equivalent Pr(1)Se6 octahedra, edges with six equivalent Rb(1)Se6 octahedra, and edges with six equivalent Pr(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 10°. All Rb(1)-Se(1) bond lengths are 3.47 Å. Pr(1) is bonded to six equivalent Se(1) atoms to form PrSe6 octahedra that share corners with six equivalent Rb(1)Se6 octahedra, edges with six equivalent Rb(1)Se6 octahedra, and edges with six equivalent Pr(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 10°. All Pr(1)-Se(1) bond lengths are 3.01 Å. Se(1) is bonded to three equivalent Rb(1) and three equivalent Pr(1) atoms to form a mixture of corner and edge-sharing SeRb3Pr3 octahedra. The corner-sharing octahedra are not tilted.