Materials Data on Bi4RuI2 by Materials Project
RuBi4I2 crystallizes in the tetragonal I4/m space group. The structure is one-dimensional and consists of two RuBi4I2 ribbons oriented in the (0, 0, 1) direction. Ru is bonded in a 8-coordinate geometry to one Ru and eight Bi atoms. The Ru–Ru bond length is 2.88 Å. There are four shorter (2.80 Å) and four longer (2.94 Å) Ru–Bi bond lengths. There are two inequivalent Bi sites. In the first Bi site, Bi is bonded in a 2-coordinate geometry to two equivalent Ru and two equivalent Bi atoms. Both Bi–Bi bond lengths are 3.04 Å. In the second Bi site, Bi is bonded in a 4-coordinate geometry to two equivalent Ru and two equivalent I atoms. There are one shorter (3.22 Å) and one longer (3.24 Å) Bi–I bond lengths. I is bonded in a 2-coordinate geometry to two equivalent Bi atoms.