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Sr(InTe2)2 crystallizes in the tetragonal I4/m space group. The structure is three-dimensional. Sr2+ is bonded in a square co-planar geometry to four equivalent Te2- atoms. All Sr–Te bond lengths are 3.34 Å. In3+ is bonded to four equivalent Te2- atoms to form edge-sharing InTe4 tetrahedra. All In–Te bond lengths are 2.85 Å. Te2- is bonded in a 3-coordinate geometry to one Sr2+ and two equivalent In3+ atoms.
Sr(InTe2)2 crystallizes in the orthorhombic Cccm space group. The structure is three-dimensional. Sr2+ is bonded in a 8-coordinate geometry to eight Te2- atoms. There are four shorter (3.51 Å) and four longer (3.58 Å) Sr–Te bond lengths. In3+ is bonded to four Te2- atoms to form edge-sharing InTe4 tetrahedra. There are a spread of In–Te bond distances ranging from 2.83–2.88 Å. There are two inequivalent Te2- sites. In the first Te2- site, Te2- is bonded in a 4-coordinate geometry to two equivalent Sr2+ and two equivalent In3+ atoms. In the second Te2- site, Te2- is bonded to two equivalent Sr2+ and two equivalent In3+ atoms to form a mixture of distorted corner and edge-sharing TeSr2In2 trigonal pyramids.