Rb2SbBr6 crystallizes in the tetragonal I4_1/a space group. Rb(1) is bonded in a 11-coordinate geometry to two equivalent Br(3), two equivalent Br(4), three equivalent Br(1), and four equivalent Br(2) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in an octahedral geometry to two equivalent Br(3) and four equivalent Br(1) atoms. In the second Sb site, Sb(2) is bonded in an octahedral geometry to two equivalent Br(4) and four equivalent Br(2) atoms. There are four inequivalent Br sites. In the first Br site, Br(4) is bonded to four equivalent Rb(1) and one Sb(2) atom to form a mixture of edge, corner, and face-sharing BrRb4Sb square pyramids. In the second Br site, Br(1) is bonded in a 1-coordinate geometry to three equivalent Rb(1) and one Sb(1) atom. In the third Br site, Br(2) is bonded to four equivalent Rb(1) and one Sb(2) atom to form a mixture of distorted edge, corner, and face-sharing BrRb4Sb square pyramids. In the fourth Br site, Br(3) is bonded in a distorted single-bond geometry to four equivalent Rb(1) and one Sb(1) atom.
Rb2SbBr6 crystallizes in the tetragonal I4_1/a space group. Rb(1) is bonded in a 11-coordinate geometry to two equivalent Br(3), two equivalent Br(4), three equivalent Br(1), and four equivalent Br(2) atoms. There is one shorter (4.02 Å) and one longer (4.03 Å) Rb(1)-Br(3) bond length. There is one shorter (3.74 Å) and one longer (3.75 Å) Rb(1)-Br(4) bond length. There are a spread of Rb(1)-Br(1) bond distances ranging from 3.77-4.09 Å. There are a spread of Rb(1)-Br(2) bond distances ranging from 3.69-3.95 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in an octahedral geometry to two equivalent Br(3) and four equivalent Br(1) atoms. Both Sb(1)-Br(3) bond lengths are 2.67 Å. All Sb(1)-Br(1) bond lengths are 2.68 Å. In the second Sb site, Sb(2) is bonded in an octahedral geometry to two equivalent Br(4) and four equivalent Br(2) atoms. Both Sb(2)-Br(4) bond lengths are 2.76 Å. All Sb(2)-Br(2) bond lengths are 2.75 Å. There are four inequivalent Br sites. In the first Br site, Br(4) is bonded to four equivalent Rb(1) and one Sb(2) atom to form a mixture of edge, corner, and face-sharing BrRb4Sb square pyramids. In the second Br site, Br(1) is bonded in a 1-coordinate geometry to three equivalent Rb(1) and one Sb(1) atom. In the third Br site, Br(2) is bonded to four equivalent Rb(1) and one Sb(2) atom to form a mixture of distorted edge, corner, and face-sharing BrRb4Sb square pyramids. In the fourth Br site, Br(3) is bonded in a distorted single-bond geometry to four equivalent Rb(1) and one Sb(1) atom.