ScAgSe2 is Modderite-derived structured and crystallizes in the trigonal P-3m1 space group. Sc(1) is bonded to six equivalent Se(1) atoms to form ScSe6 octahedra that share corners with twelve equivalent Ag(1)Se6 octahedra, edges with six equivalent Sc(1)Se6 octahedra, and faces with two equivalent Ag(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 48°. Ag(1) is bonded to six equivalent Se(1) atoms to form distorted AgSe6 octahedra that share corners with twelve equivalent Sc(1)Se6 octahedra, edges with six equivalent Ag(1)Se6 octahedra, and faces with two equivalent Sc(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 48°. Se(1) is bonded in a 6-coordinate geometry to three equivalent Sc(1) and three equivalent Ag(1) atoms.
ScAgSe2 is Modderite-derived structured and crystallizes in the trigonal P-3m1 space group. Sc(1) is bonded to six equivalent Se(1) atoms to form ScSe6 octahedra that share corners with twelve equivalent Ag(1)Se6 octahedra, edges with six equivalent Sc(1)Se6 octahedra, and faces with two equivalent Ag(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 48°. All Sc(1)-Se(1) bond lengths are 2.73 Å. Ag(1) is bonded to six equivalent Se(1) atoms to form distorted AgSe6 octahedra that share corners with twelve equivalent Sc(1)Se6 octahedra, edges with six equivalent Ag(1)Se6 octahedra, and faces with two equivalent Sc(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 48°. All Ag(1)-Se(1) bond lengths are 2.87 Å. Se(1) is bonded in a 6-coordinate geometry to three equivalent Sc(1) and three equivalent Ag(1) atoms.