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Hf2TcZn crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Hf2TcZn ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to one Tc and one Zn atom. The Hf–Tc bond length is 2.23 Å. The Hf–Zn bond length is 2.96 Å. Tc is bonded in a linear geometry to two equivalent Hf atoms. Zn is bonded in a linear geometry to two equivalent Hf atoms.
Hf2TcZn is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Hf is bonded in a body-centered cubic geometry to four equivalent Tc and four equivalent Zn atoms. All Hf–Tc bond lengths are 2.85 Å. All Hf–Zn bond lengths are 2.85 Å. Tc is bonded in a body-centered cubic geometry to eight equivalent Hf atoms. Zn is bonded in a body-centered cubic geometry to eight equivalent Hf atoms.