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InGe3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. In is bonded to twelve equivalent Ge atoms to form a mixture of face and corner-sharing InGe12 cuboctahedra. All In–Ge bond lengths are 3.11 Å. Ge is bonded in a distorted square co-planar geometry to four equivalent In atoms.
InGe3 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. In is bonded to twelve Ge atoms to form a mixture of face, edge, and corner-sharing InGe12 cuboctahedra. There are four shorter (3.02 Å) and eight longer (3.22 Å) In–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 8-coordinate geometry to four equivalent In and four equivalent Ge atoms. All Ge–Ge bond lengths are 3.02 Å. In the second Ge site, Ge is bonded in a square co-planar geometry to four equivalent In atoms.