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LaHg2Sn crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two LaHg2Sn 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 3.15 Å. Hg is bonded in a linear geometry to one La and one Sn atom. The Hg–Sn bond length is 2.86 Å. Sn is bonded in a linear geometry to two equivalent Hg atoms.
La2HgSn 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 Sn atoms. All La–Hg bond lengths are 3.41 Å. All La–Sn bond lengths are 3.41 Å. Hg is bonded in a body-centered cubic geometry to eight equivalent La atoms. Sn is bonded in a body-centered cubic geometry to eight equivalent La atoms.
La2HgSn crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two La2HgSn ribbons oriented in the (1, 0, 0) direction. La is bonded in a linear geometry to one Hg and one Sn atom. The La–Hg bond length is 3.09 Å. The La–Sn bond length is 2.96 Å. Hg is bonded in a linear geometry to two equivalent La atoms. Sn is bonded in a linear geometry to two equivalent La atoms.