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SmAg is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sm is bonded in a body-centered cubic geometry to eight equivalent Ag atoms. All Sm–Ag bond lengths are 3.22 Å. Ag is bonded in a body-centered cubic geometry to eight equivalent Sm atoms.
SmAg3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Sm is bonded in a distorted body-centered cubic geometry to fourteen Ag atoms. There are eight shorter (3.05 Å) and six longer (3.52 Å) Sm–Ag bond lengths. There are two inequivalent Ag sites. In the first Ag site, Ag is bonded to four equivalent Sm and four equivalent Ag atoms to form a mixture of distorted corner, edge, and face-sharing AgSm4Ag4 tetrahedra. All Ag–Ag bond lengths are 3.05 Å. In the second Ag site, Ag is bonded in a 8-coordinate geometry to six equivalent Sm and eight equivalent Ag atoms.
SmAg3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Sm is bonded to twelve equivalent Ag atoms to form a mixture of face and corner-sharing SmAg12 cuboctahedra. There are six shorter (3.16 Å) and six longer (3.23 Å) Sm–Ag bond lengths. Ag is bonded in a 4-coordinate geometry to four equivalent Sm atoms.
Sm3Ag is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Sm sites. In the first Sm site, Sm is bonded to eight Sm and four equivalent Ag atoms to form distorted SmSm8Ag4 cuboctahedra that share corners with twelve equivalent SmSm8Ag4 cuboctahedra, edges with eight equivalent SmSm8Ag4 cuboctahedra, edges with eight equivalent AgSm12 cuboctahedra, faces with four equivalent AgSm12 cuboctahedra, and faces with ten equivalent SmSm8Ag4 cuboctahedra. There are four shorter (3.34 Å) and four longer (3.50 Å) Sm–Sm bond lengths. All Sm–Ag bond lengths are 3.50 Å. In the second Sm site, Sm is bonded in a square co-planar geometry to eight equivalent Sm and four equivalent Ag atoms. All Sm–Ag bond lengths are 3.34 Å. Ag is bonded to twelve Sm atoms to form AgSm12 cuboctahedra that share corners with four equivalent AgSm12 cuboctahedra, edges with eight equivalent AgSm12 cuboctahedra, edges with sixteen equivalent SmSm8Ag4 cuboctahedra, faces with four equivalent AgSm12 cuboctahedra, and faces with eight equivalent SmSm8Ag4 cuboctahedra.