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DyOs3 is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Dy3+ is bonded to twelve equivalent Os1- atoms to form a mixture of corner and face-sharing DyOs12 cuboctahedra. There are six shorter (2.91 Å) and six longer (2.92 Å) Dy–Os bond lengths. Os1- is bonded in a distorted see-saw-like geometry to four equivalent Dy3+ atoms.
Dy3Os 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 3-coordinate geometry to three equivalent Os atoms. There are a spread of Dy–Os bond distances ranging from 2.86–3.17 Å. In the second Dy site, Dy is bonded in a distorted bent 150 degrees geometry to two equivalent Os atoms. There are one shorter (2.77 Å) and one longer (2.82 Å) Dy–Os bond lengths. Os is bonded in a 8-coordinate geometry to eight Dy atoms.
DyOs2 is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Dy3+ is bonded in a 12-coordinate geometry to twelve Os+1.50- atoms. There are nine shorter (3.13 Å) and three longer (3.15 Å) Dy–Os bond lengths. There are two inequivalent Os+1.50- sites. In the first Os+1.50- site, Os+1.50- is bonded to six equivalent Dy3+ and six equivalent Os+1.50- atoms to form a mixture of face, edge, and corner-sharing OsDy6Os6 cuboctahedra. All Os–Os bond lengths are 2.72 Å. In the second Os+1.50- site, Os+1.50- is bonded to six equivalent Dy3+ and six Os+1.50- atoms to form a mixture of face, edge, and corner-sharing OsDy6Os6 cuboctahedra. There are two shorter (2.57 Å) and two longer (2.76 Å) Os–Os bond lengths.