In5Bi3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent In sites. In the first In site, In(1) is bonded to two equivalent Bi(1) and four equivalent Bi(2) atoms to form corner-sharing InBi6 octahedra. The corner-sharing octahedral tilt angles range from 0-44°. In the second In site, In(2) is bonded in a 9-coordinate geometry to four equivalent In(2), two equivalent Bi(1), and three equivalent Bi(2) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 10-coordinate geometry to two equivalent In(1) and eight equivalent In(2) atoms. In the second Bi site, Bi(2) is bonded in a 8-coordinate geometry to two equivalent In(1) and six equivalent In(2) atoms.
In5Bi3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent In sites. In the first In site, In(1) is bonded to two equivalent Bi(1) and four equivalent Bi(2) atoms to form corner-sharing InBi6 octahedra. The corner-sharing octahedral tilt angles range from 0-44°. Both In(1)-Bi(1) bond lengths are 3.37 Å. All In(1)-Bi(2) bond lengths are 3.21 Å. In the second In site, In(2) is bonded in a 9-coordinate geometry to four equivalent In(2), two equivalent Bi(1), and three equivalent Bi(2) atoms. There are a spread of In(2)-In(2) bond distances ranging from 3.35-3.48 Å. Both In(2)-Bi(1) bond lengths are 3.42 Å. There is one shorter (3.31 Å) and two longer (3.34 Å) In(2)-Bi(2) bond lengths. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 10-coordinate geometry to two equivalent In(1) and eight equivalent In(2) atoms. In the second Bi site, Bi(2) is bonded in a 8-coordinate geometry to two equivalent In(1) and six equivalent In(2) atoms.