Rb2In3 crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 14-coordinate geometry to one Rb(1), four equivalent Rb(2), one In(2), and eight equivalent In(1) atoms. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to four equivalent Rb(1), four equivalent In(1), and four equivalent In(2) atoms. There are two inequivalent In sites. In the first In site, In(1) is bonded in a 11-coordinate geometry to two equivalent Rb(2), four equivalent Rb(1), two equivalent In(2), and three equivalent In(1) atoms. In the second In site, In(2) is bonded in a 9-coordinate geometry to one Rb(1), four equivalent Rb(2), and four equivalent In(1) atoms.
Rb2In3 crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 14-coordinate geometry to one Rb(1), four equivalent Rb(2), one In(2), and eight equivalent In(1) atoms. The Rb(1)-Rb(1) bond length is 3.50 Å. All Rb(1)-Rb(2) bond lengths are 4.12 Å. The Rb(1)-In(2) bond length is 3.87 Å. All Rb(1)-In(1) bond lengths are 4.13 Å. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to four equivalent Rb(1), four equivalent In(1), and four equivalent In(2) atoms. All Rb(2)-In(1) bond lengths are 4.23 Å. All Rb(2)-In(2) bond lengths are 3.83 Å. There are two inequivalent In sites. In the first In site, In(1) is bonded in a 11-coordinate geometry to two equivalent Rb(2), four equivalent Rb(1), two equivalent In(2), and three equivalent In(1) atoms. Both In(1)-In(2) bond lengths are 3.11 Å. There is one shorter (2.83 Å) and two longer (2.89 Å) In(1)-In(1) bond lengths. In the second In site, In(2) is bonded in a 9-coordinate geometry to one Rb(1), four equivalent Rb(2), and four equivalent In(1) atoms.