DyAgSe2 crystallizes in the orthorhombic P2_12_12_1 space group. Dy(1) is bonded to three equivalent Se(1) and three equivalent Se(2) atoms to form a mixture of edge and corner-sharing DySe6 octahedra. The corner-sharing octahedral tilt angles range from 44-51°. Ag(1) is bonded in a 4-coordinate 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 Dy(1) and two equivalent Ag(1) atoms to form a mixture of distorted edge and corner-sharing SeDy3Ag2 trigonal bipyramids. In the second Se site, Se(2) is bonded to three equivalent Dy(1) and two equivalent Ag(1) atoms to form a mixture of distorted edge and corner-sharing SeDy3Ag2 trigonal bipyramids.
DyAgSe2 crystallizes in the orthorhombic P2_12_12_1 space group. Dy(1) is bonded to three equivalent Se(1) and three equivalent Se(2) atoms to form a mixture of edge and corner-sharing DySe6 octahedra. The corner-sharing octahedral tilt angles range from 44-51°. There are a spread of Dy(1)-Se(1) bond distances ranging from 2.85-2.88 Å. There are a spread of Dy(1)-Se(2) bond distances ranging from 2.85-2.89 Å. Ag(1) is bonded in a 4-coordinate geometry to two equivalent Se(1) and two equivalent Se(2) atoms. There is one shorter (2.69 Å) and one longer (2.71 Å) Ag(1)-Se(1) bond length. Both Ag(1)-Se(2) bond lengths are 2.73 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to three equivalent Dy(1) and two equivalent Ag(1) atoms to form a mixture of distorted edge and corner-sharing SeDy3Ag2 trigonal bipyramids. In the second Se site, Se(2) is bonded to three equivalent Dy(1) and two equivalent Ag(1) atoms to form a mixture of distorted edge and corner-sharing SeDy3Ag2 trigonal bipyramids.