Cr4AgCdSe8 is Spinel-derived structured and crystallizes in the cubic F-43m space group. Cr(1) is bonded to three equivalent Se(1) and three equivalent Se(2) atoms to form CrSe6 octahedra that share corners with three equivalent Ag(1)Se4 tetrahedra, corners with three equivalent Cd(1)Se4 tetrahedra, and edges with six equivalent Cr(1)Se6 octahedra. Ag(1) is bonded to four equivalent Se(1) atoms to form AgSe4 tetrahedra that share corners with twelve equivalent Cr(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 59°. Cd(1) is bonded to four equivalent Se(2) atoms to form CdSe4 tetrahedra that share corners with twelve equivalent Cr(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 61°. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to three equivalent Cr(1) and one Ag(1) atom to form distorted SeCr3Ag trigonal pyramids that share corners with nine equivalent Se(2)Cr3Cd tetrahedra, corners with three equivalent Se(1)Cr3Ag trigonal pyramids, and edges with three equivalent Se(1)Cr3Ag trigonal pyramids. In the second Se site, Se(2) is bonded to three equivalent Cr(1) and one Cd(1) atom to form distorted SeCr3Cd tetrahedra that share corners with three equivalent Se(2)Cr3Cd tetrahedra, corners with nine equivalent Se(1)Cr3Ag trigonal pyramids, and edges with three equivalent Se(2)Cr3Cd tetrahedra.
Cr4AgCdSe8 is Spinel-derived structured and crystallizes in the cubic F-43m space group. Cr(1) is bonded to three equivalent Se(1) and three equivalent Se(2) atoms to form CrSe6 octahedra that share corners with three equivalent Ag(1)Se4 tetrahedra, corners with three equivalent Cd(1)Se4 tetrahedra, and edges with six equivalent Cr(1)Se6 octahedra. All Cr(1)-Se(1) bond lengths are 2.54 Å. All Cr(1)-Se(2) bond lengths are 2.57 Å. Ag(1) is bonded to four equivalent Se(1) atoms to form AgSe4 tetrahedra that share corners with twelve equivalent Cr(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 59°. All Ag(1)-Se(1) bond lengths are 2.61 Å. Cd(1) is bonded to four equivalent Se(2) atoms to form CdSe4 tetrahedra that share corners with twelve equivalent Cr(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 61°. All Cd(1)-Se(2) bond lengths are 2.64 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to three equivalent Cr(1) and one Ag(1) atom to form distorted SeCr3Ag trigonal pyramids that share corners with nine equivalent Se(2)Cr3Cd tetrahedra, corners with three equivalent Se(1)Cr3Ag trigonal pyramids, and edges with three equivalent Se(1)Cr3Ag trigonal pyramids. In the second Se site, Se(2) is bonded to three equivalent Cr(1) and one Cd(1) atom to form distorted SeCr3Cd tetrahedra that share corners with three equivalent Se(2)Cr3Cd tetrahedra, corners with nine equivalent Se(1)Cr3Ag trigonal pyramids, and edges with three equivalent Se(2)Cr3Cd tetrahedra.