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MgIrZn2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two MgIrZn2 ribbons oriented in the (1, 0, 0) direction. Mg is bonded in a linear geometry to two equivalent Zn atoms. Both Mg–Zn bond lengths are 2.73 Å. Ir is bonded in a linear geometry to two equivalent Zn atoms. Both Ir–Zn bond lengths are 2.45 Å. Zn is bonded in a linear geometry to one Mg and one Ir atom.
MgIrZn2 is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Mg is bonded in a distorted body-centered cubic geometry to six equivalent Ir and eight equivalent Zn atoms. All Mg–Ir bond lengths are 3.10 Å. All Mg–Zn bond lengths are 2.69 Å. Ir is bonded in a distorted body-centered cubic geometry to six equivalent Mg and eight equivalent Zn atoms. All Ir–Zn bond lengths are 2.69 Å. Zn is bonded in a body-centered cubic geometry to four equivalent Mg and four equivalent Ir atoms.
Mg2IrZn crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Mg2IrZn ribbons oriented in the (1, 0, 0) direction. Mg is bonded in a linear geometry to one Ir and one Zn atom. The Mg–Ir bond length is 2.51 Å. The Mg–Zn bond length is 2.76 Å. Ir is bonded in a linear geometry to two equivalent Mg atoms. Zn is bonded in a linear geometry to two equivalent Mg atoms.