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BaIn2 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Ba is bonded in a 12-coordinate geometry to twelve equivalent In atoms. There are a spread of Ba–In bond distances ranging from 3.60–3.96 Å. In is bonded in a 10-coordinate geometry to six equivalent Ba and four equivalent In atoms. There are a spread of In–In bond distances ranging from 3.05–3.15 Å.
BaIn4 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ba is bonded in a 8-coordinate geometry to sixteen In atoms. There are eight shorter (3.85 Å) and eight longer (3.98 Å) Ba–In bond lengths. There are two inequivalent In sites. In the first In site, In is bonded in a 8-coordinate geometry to four equivalent Ba and four equivalent In atoms. All In–In bond lengths are 3.01 Å. In the second In site, In is bonded in a 9-coordinate geometry to four equivalent Ba and five In atoms. The In–In bond length is 2.86 Å.
BaIn crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Ba sites. In the first Ba site, Ba is bonded in a 8-coordinate geometry to eight equivalent In atoms. There are a spread of Ba–In bond distances ranging from 3.52–3.98 Å. In the second Ba site, Ba is bonded in a 2-coordinate geometry to eight equivalent In atoms. There are a spread of Ba–In bond distances ranging from 3.60–4.11 Å. In is bonded in a 11-coordinate geometry to eight Ba and three equivalent In atoms. There are one shorter (3.33 Å) and two longer (3.49 Å) In–In bond lengths.
Ba9In4 crystallizes in the tetragonal I4/m space group. The structure is three-dimensional. there are three inequivalent Ba sites. In the first Ba site, Ba is bonded in a square co-planar geometry to four equivalent In atoms. All Ba–In bond lengths are 3.65 Å. In the second Ba site, Ba is bonded in a 3-coordinate geometry to three equivalent In atoms. There are two shorter (3.70 Å) and one longer (3.72 Å) Ba–In bond lengths. In the third Ba site, Ba is bonded in a distorted trigonal planar geometry to three equivalent In atoms. There are one shorter (3.58 Å) and two longer (3.69 Å) Ba–In bond lengths. In is bonded in a 7-coordinate geometry to seven Ba atoms.
Ba2In is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Ba sites. In the first Ba site, Ba is bonded in a 3-coordinate geometry to three equivalent In atoms. There are one shorter (3.73 Å) and two longer (3.79 Å) Ba–In bond lengths. In the second Ba site, Ba is bonded to four equivalent In atoms to form a mixture of distorted edge and corner-sharing BaIn4 tetrahedra. There are a spread of Ba–In bond distances ranging from 3.61–3.68 Å. In is bonded in a 7-coordinate geometry to seven Ba atoms.