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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.