Sr3Nb is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to four equivalent Sr(2) and four equivalent Nb(1) atoms to form a mixture of distorted corner, edge, and face-sharing SrSr4Nb4 tetrahedra. In the second Sr site, Sr(2) is bonded in a 14-coordinate geometry to eight equivalent Sr(1) and six equivalent Nb(1) atoms. Nb(1) is bonded in a body-centered cubic geometry to six equivalent Sr(2) and eight equivalent Sr(1) atoms.
Sr3Nb is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to four equivalent Sr(2) and four equivalent Nb(1) atoms to form a mixture of distorted corner, edge, and face-sharing SrSr4Nb4 tetrahedra. All Sr(1)-Sr(2) bond lengths are 3.72 Å. All Sr(1)-Nb(1) bond lengths are 3.72 Å. In the second Sr site, Sr(2) is bonded in a 14-coordinate geometry to eight equivalent Sr(1) and six equivalent Nb(1) atoms. All Sr(2)-Nb(1) bond lengths are 4.29 Å. Nb(1) is bonded in a body-centered cubic geometry to six equivalent Sr(2) and eight equivalent Sr(1) atoms.