In is alpha structured and crystallizes in the cubic I-43m space group. There are four inequivalent In sites. In the first In site, In(1) is bonded in a tetrahedral geometry to four equivalent In(2) atoms. In the second In site, In(2) is bonded in a 10-coordinate geometry to one In(1), three equivalent In(4), and six equivalent In(3) atoms. In the third In site, In(3) is bonded in a 10-coordinate geometry to two equivalent In(2), three equivalent In(3), and five equivalent In(4) atoms. In the fourth In site, In(4) is bonded in a 12-coordinate geometry to one In(2), five equivalent In(3), and six equivalent In(4) atoms.
In is alpha structured and crystallizes in the cubic I-43m space group. There are four inequivalent In sites. In the first In site, In(1) is bonded in a tetrahedral geometry to four equivalent In(2) atoms. All In(1)-In(2) bond lengths are 3.36 Å. In the second In site, In(2) is bonded in a 10-coordinate geometry to one In(1), three equivalent In(4), and six equivalent In(3) atoms. All In(2)-In(4) bond lengths are 3.27 Å. All In(2)-In(3) bond lengths are 3.45 Å. In the third In site, In(3) is bonded in a 10-coordinate geometry to two equivalent In(2), three equivalent In(3), and five equivalent In(4) atoms. There is one shorter (3.12 Å) and two longer (3.17 Å) In(3)-In(3) bond lengths. There are a spread of In(3)-In(4) bond distances ranging from 3.15-3.32 Å. In the fourth In site, In(4) is bonded in a 12-coordinate geometry to one In(2), five equivalent In(3), and six equivalent In(4) atoms. There are two shorter (3.46 Å) and four longer (3.54 Å) In(4)-In(4) bond lengths.