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Ti2RuIr crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Ti2RuIr ribbons oriented in the (1, 0, 0) direction. Ti is bonded in a linear geometry to one Ru and one Ir atom. The Ti–Ru bond length is 2.18 Å. The Ti–Ir bond length is 2.27 Å. Ru is bonded in a linear geometry to two equivalent Ti atoms. Ir is bonded in a linear geometry to two equivalent Ti atoms.
Ti2RuIr is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Ti is bonded in a body-centered cubic geometry to four equivalent Ru and four equivalent Ir atoms. All Ti–Ru bond lengths are 2.69 Å. All Ti–Ir bond lengths are 2.69 Å. Ru is bonded in a body-centered cubic geometry to eight equivalent Ti atoms. Ir is bonded in a body-centered cubic geometry to eight equivalent Ti atoms.