ScAgSe2 crystallizes in the orthorhombic P2_12_12_1 space group. Sc(1) is bonded to three equivalent Se(1) and three equivalent Se(2) atoms to form a mixture of corner and edge-sharing ScSe6 octahedra. The corner-sharing octahedral tilt angles range from 43-51°. Ag(1) is bonded in a distorted see-saw-like geometry to two equivalent Se(1) and two equivalent Se(2) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to three equivalent Sc(1) and two equivalent Ag(1) atoms to form a mixture of distorted corner and edge-sharing SeSc3Ag2 trigonal bipyramids. In the second Se site, Se(2) is bonded to three equivalent Sc(1) and two equivalent Ag(1) atoms to form a mixture of distorted corner and edge-sharing SeSc3Ag2 trigonal bipyramids.
ScAgSe2 crystallizes in the orthorhombic P2_12_12_1 space group. Sc(1) is bonded to three equivalent Se(1) and three equivalent Se(2) atoms to form a mixture of corner and edge-sharing ScSe6 octahedra. The corner-sharing octahedral tilt angles range from 43-51°. There are a spread of Sc(1)-Se(1) bond distances ranging from 2.73-2.77 Å. There is one shorter (2.70 Å) and two longer (2.73 Å) Sc(1)-Se(2) bond lengths. Ag(1) is bonded in a distorted see-saw-like geometry to two equivalent Se(1) and two equivalent Se(2) atoms. There is one shorter (2.69 Å) and one longer (2.70 Å) Ag(1)-Se(1) bond length. There is one shorter (2.70 Å) and one longer (2.71 Å) Ag(1)-Se(2) bond length. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to three equivalent Sc(1) and two equivalent Ag(1) atoms to form a mixture of distorted corner and edge-sharing SeSc3Ag2 trigonal bipyramids. In the second Se site, Se(2) is bonded to three equivalent Sc(1) and two equivalent Ag(1) atoms to form a mixture of distorted corner and edge-sharing SeSc3Ag2 trigonal bipyramids.