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La2HgZn crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two La2HgZn ribbons oriented in the (1, 0, 0) direction. La is bonded in a linear geometry to one Hg and one Zn atom. The La–Hg bond length is 3.12 Å. The La–Zn bond length is 2.94 Å. Hg is bonded in a linear geometry to two equivalent La atoms. Zn is bonded in a linear geometry to two equivalent La atoms.
LaHg2Zn crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two LaHg2Zn ribbons oriented in the (1, 0, 0) direction. La is bonded in a linear geometry to two equivalent Hg atoms. Both La–Hg bond lengths are 3.16 Å. Hg is bonded in a linear geometry to one La and one Zn atom. The Hg–Zn bond length is 2.80 Å. Zn is bonded in a linear geometry to two equivalent Hg atoms.
La2HgZn is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. La is bonded in a body-centered cubic geometry to four equivalent Hg and four equivalent Zn atoms. All La–Hg bond lengths are 3.33 Å. All La–Zn bond lengths are 3.33 Å. Hg is bonded in a body-centered cubic geometry to eight equivalent La atoms. Zn is bonded in a body-centered cubic geometry to eight equivalent La atoms.