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IrSn crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ir is bonded to six equivalent Sn atoms to form a mixture of distorted edge, face, and corner-sharing IrSn6 octahedra. The corner-sharing octahedral tilt angles are 51°. All Ir–Sn bond lengths are 2.73 Å. Sn is bonded in a 6-coordinate geometry to six equivalent Ir atoms.
Ir5Sn7 crystallizes in the tetragonal I4mm space group. The structure is three-dimensional. there are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 7-coordinate geometry to seven Sn atoms. There are a spread of Ir–Sn bond distances ranging from 2.72–2.88 Å. In the second Ir site, Ir is bonded in a square pyramidal geometry to five Sn atoms. All Ir–Sn bond lengths are 2.63 Å. There are three inequivalent Sn sites. In the first Sn site, Sn is bonded in a 5-coordinate geometry to five Ir atoms. In the second Sn site, Sn is bonded to four equivalent Ir atoms to form distorted edge-sharing SnIr4 tetrahedra. In the third Sn site, Sn is bonded in a 5-coordinate geometry to five Ir atoms.
IrSn2 is Fluorite structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Ir is bonded in a body-centered cubic geometry to eight equivalent Sn atoms. All Ir–Sn bond lengths are 2.79 Å. Sn is bonded to four equivalent Ir atoms to form a mixture of edge and corner-sharing SnIr4 tetrahedra.
Ir3Sn7 crystallizes in the cubic Im-3m space group. The structure is three-dimensional. Ir is bonded in a 8-coordinate geometry to eight Sn atoms. There are four shorter (2.79 Å) and four longer (2.81 Å) Ir–Sn bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a 4-coordinate geometry to three equivalent Ir and four equivalent Sn atoms. There are one shorter (2.81 Å) and three longer (3.14 Å) Sn–Sn bond lengths. In the second Sn site, Sn is bonded in a 8-coordinate geometry to four equivalent Ir atoms.
IrSn4 crystallizes in the tetragonal I4_1/acd space group. The structure is two-dimensional and consists of four IrSn4 sheets oriented in the (0, 0, 1) direction. Ir is bonded in a 8-coordinate geometry to eight equivalent Sn atoms. There are four shorter (2.78 Å) and four longer (2.79 Å) Ir–Sn bond lengths. Sn is bonded in a 2-coordinate geometry to two equivalent Ir atoms.
IrSn4 crystallizes in the orthorhombic Ccce space group. The structure is two-dimensional and consists of two IrSn4 sheets oriented in the (0, 1, 0) direction. Ir is bonded in a 8-coordinate geometry to eight equivalent Sn atoms. There are four shorter (2.78 Å) and four longer (2.79 Å) Ir–Sn bond lengths. Sn is bonded in a 2-coordinate geometry to two equivalent Ir atoms.