Sr2Bi crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted square co-planar geometry to four equivalent Bi(1) atoms. In the second Sr site, Sr(2) is bonded to five equivalent Bi(1) atoms to form a mixture of distorted edge and corner-sharing SrBi5 square pyramids. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Sr(1) and five equivalent Sr(2) atoms.
Sr2Bi crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted square co-planar geometry to four equivalent Bi(1) atoms. All Sr(1)-Bi(1) bond lengths are 3.54 Å. In the second Sr site, Sr(2) is bonded to five equivalent Bi(1) atoms to form a mixture of distorted edge and corner-sharing SrBi5 square pyramids. There is one shorter (3.40 Å) and four longer (3.70 Å) Sr(2)-Bi(1) bond lengths. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Sr(1) and five equivalent Sr(2) atoms.