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DyIr2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Dy is bonded in a 12-coordinate geometry to twelve equivalent Ir atoms. All Dy–Ir bond lengths are 3.14 Å. Ir is bonded to six equivalent Dy and six equivalent Ir atoms to form a mixture of edge, face, and corner-sharing IrDy6Ir6 cuboctahedra. All Ir–Ir bond lengths are 2.68 Å.
DyIr3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Dy is bonded to twelve equivalent Ir atoms to form a mixture of face and corner-sharing DyIr12 cuboctahedra. All Dy–Ir bond lengths are 2.87 Å. Ir is bonded in a distorted square co-planar geometry to four equivalent Dy atoms.
Dy5Ir3 crystallizes in the tetragonal P4/ncc space group. The structure is three-dimensional. there are two inequivalent Dy sites. In the first Dy site, Dy is bonded to five Ir atoms to form distorted DyIr5 trigonal bipyramids that share corners with four equivalent DyIr4 tetrahedra, corners with eleven equivalent DyIr5 trigonal bipyramids, an edgeedge with one DyIr4 tetrahedra, edges with six equivalent DyIr5 trigonal bipyramids, and faces with two equivalent DyIr5 trigonal bipyramids. There are a spread of Dy–Ir bond distances ranging from 2.89–3.14 Å. In the second Dy site, Dy is bonded to four equivalent Ir atoms to form DyIr4 tetrahedra that share corners with sixteen equivalent DyIr5 trigonal bipyramids, edges with two equivalent DyIr4 tetrahedra, and edges with four equivalent DyIr5 trigonal bipyramids. All Dy–Ir bond lengths are 2.85 Å. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 8-coordinate geometry to eight Dy atoms. In the second Ir site, Ir is bonded in a 8-coordinate geometry to eight equivalent Dy atoms.
Dy3Ir is Cementite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Dy sites. In the first Dy site, Dy is bonded in a 2-coordinate geometry to three equivalent Ir atoms. There are a spread of Dy–Ir bond distances ranging from 2.86–3.25 Å. In the second Dy site, Dy is bonded in a distorted bent 150 degrees geometry to two equivalent Ir atoms. There are one shorter (2.78 Å) and one longer (2.87 Å) Dy–Ir bond lengths. Ir is bonded in a 6-coordinate geometry to eight Dy atoms.