Rb crystallizes in the orthorhombic C222_1 space group. There are seven inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), one Rb(7), two equivalent Rb(5), and three equivalent Rb(6) atoms. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(4), one Rb(5), one Rb(6), and one Rb(7) atom. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to two equivalent Rb(6), two equivalent Rb(7), and four equivalent Rb(4) atoms. In the fourth Rb site, Rb(4) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(2), two equivalent Rb(3), and two equivalent Rb(7) atoms. In the fifth Rb site, Rb(5) is bonded in a 4-coordinate geometry to one Rb(2), one Rb(7), two equivalent Rb(1), and two equivalent Rb(6) atoms. In the sixth Rb site, Rb(6) is bonded in a 8-coordinate geometry to one Rb(2), one Rb(3), one Rb(7), two equivalent Rb(5), and three equivalent Rb(1) atoms. In the seventh Rb site, Rb(7) is bonded to one Rb(1), one Rb(2), one Rb(3), one Rb(5), one Rb(6), one Rb(7), and two equivalent Rb(4) atoms to form distorted corner-sharing RbRb8 hexagonal bipyramids.
Rb crystallizes in the orthorhombic C222_1 space group. There are seven inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), one Rb(7), two equivalent Rb(5), and three equivalent Rb(6) atoms. The Rb(1)-Rb(1) bond length is 5.24 Å. The Rb(1)-Rb(2) bond length is 5.22 Å. The Rb(1)-Rb(4) bond length is 5.01 Å. The Rb(1)-Rb(7) bond length is 4.96 Å. There is one shorter (4.88 Å) and one longer (4.90 Å) Rb(1)-Rb(5) bond length. There are a spread of Rb(1)-Rb(6) bond distances ranging from 5.09-5.17 Å. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(4), one Rb(5), one Rb(6), and one Rb(7) atom. The Rb(2)-Rb(4) bond length is 4.84 Å. The Rb(2)-Rb(5) bond length is 4.59 Å. The Rb(2)-Rb(6) bond length is 4.98 Å. The Rb(2)-Rb(7) bond length is 4.97 Å. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to two equivalent Rb(6), two equivalent Rb(7), and four equivalent Rb(4) atoms. Both Rb(3)-Rb(6) bond lengths are 5.10 Å. Both Rb(3)-Rb(7) bond lengths are 4.89 Å. There are two shorter (5.11 Å) and two longer (5.17 Å) Rb(3)-Rb(4) bond lengths. In the fourth Rb site, Rb(4) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(2), two equivalent Rb(3), and two equivalent Rb(7) atoms. There is one shorter (4.84 Å) and one longer (4.91 Å) Rb(4)-Rb(7) bond length. In the fifth Rb site, Rb(5) is bonded in a 4-coordinate geometry to one Rb(2), one Rb(7), two equivalent Rb(1), and two equivalent Rb(6) atoms. The Rb(5)-Rb(7) bond length is 4.32 Å. There is one shorter (5.08 Å) and one longer (5.14 Å) Rb(5)-Rb(6) bond length. In the sixth Rb site, Rb(6) is bonded in a 8-coordinate geometry to one Rb(2), one Rb(3), one Rb(7), two equivalent Rb(5), and three equivalent Rb(1) atoms. The Rb(6)-Rb(7) bond length is 4.75 Å. In the seventh Rb site, Rb(7) is bonded to one Rb(1), one Rb(2), one Rb(3), one Rb(5), one Rb(6), one Rb(7), and two equivalent Rb(4) atoms to form distorted corner-sharing RbRb8 hexagonal bipyramids. The Rb(7)-Rb(7) bond length is 4.20 Å.