RbTbF5 crystallizes in the triclinic P-1 space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 10-coordinate geometry to one F(1), one F(10), one F(14), one F(4), one F(5), one F(8), two equivalent F(11), and two equivalent F(15) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one F(11), one F(3), one F(4), one F(5), one F(6), one F(7), and one F(8) atom. In the third Rb site, Rb(3) is bonded in a 7-coordinate geometry to one F(1), one F(14), one F(3), one F(6), one F(7), and two equivalent F(10) atoms. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 8-coordinate geometry to one F(1), one F(13), one F(2), one F(3), one F(6), one F(7), and two equivalent F(12) atoms. In the second Tb site, Tb(2) is bonded in a 8-coordinate geometry to one F(11), one F(13), one F(14), one F(15), one F(5), one F(9), and two equivalent F(4) atoms. In the third Tb site, Tb(3) is bonded in a 8-coordinate geometry to one F(1), one F(10), one F(15), one F(2), one F(5), one F(6), one F(8), and one F(9) atom. There are fifteen inequivalent F sites. In the first F site, F(1) is bonded to one Rb(1), one Rb(3), one Tb(1), and one Tb(3) atom to form a mixture of corner and edge-sharing FRb2Tb2 tetrahedra. In the second F site, F(2) is bonded in a linear geometry to one Tb(1) and one Tb(3) atom. In the third F site, F(3) is bonded in a 3-coordinate geometry to one Rb(2), one Rb(3), and one Tb(1) atom. In the fourth F site, F(4) is bonded to one Rb(1), one Rb(2), and two equivalent Tb(2) atoms to form a mixture of distorted corner and edge-sharing FRb2Tb2 tetrahedra. In the fifth F site, F(5) is bonded to one Rb(1), one Rb(2), one Tb(2), and one Tb(3) atom to form a mixture of corner and edge-sharing FRb2Tb2 tetrahedra. In the sixth F site, F(6) is bonded to one Rb(2), one Rb(3), one Tb(1), and one Tb(3) atom to form a mixture of corner and edge-sharing FRb2Tb2 tetrahedra. In the seventh F site, F(7) is bonded in a 3-coordinate geometry to one Rb(2), one Rb(3), and one Tb(1) atom. In the eighth F site, F(8) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(2), and one Tb(3) atom. In the ninth F site, F(9) is bonded in a linear geometry to one Tb(2) and one Tb(3) atom. In the tenth F site, F(10) is bonded in a 2-coordinate geometry to one Rb(1), two equivalent Rb(3), and one Tb(3) atom. In the eleventh F site, F(11) is bonded in a 4-coordinate geometry to one Rb(2), two equivalent Rb(1), and one Tb(2) atom. In the twelfth F site, F(12) is bonded in a 2-coordinate geometry to two equivalent Tb(1) atoms. In the thirteenth F site, F(13) is bonded in a linear geometry to one Tb(1) and one Tb(2) atom. In the fourteenth F site, F(14) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(3), and one Tb(2) atom. In the fifteenth F site, F(15) is bonded to two equivalent Rb(1), one Tb(2), and one Tb(3) atom to form a mixture of distorted corner and edge-sharing FRb2Tb2 tetrahedra.
RbTbF5 crystallizes in the triclinic P-1 space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 10-coordinate geometry to one F(1), one F(10), one F(14), one F(4), one F(5), one F(8), two equivalent F(11), and two equivalent F(15) atoms. The Rb(1)-F(1) bond length is 2.90 Å. The Rb(1)-F(10) bond length is 3.40 Å. The Rb(1)-F(14) bond length is 3.12 Å. The Rb(1)-F(4) bond length is 3.04 Å. The Rb(1)-F(5) bond length is 2.87 Å. The Rb(1)-F(8) bond length is 3.02 Å. There is one shorter (3.07 Å) and one longer (3.25 Å) Rb(1)-F(11) bond length. There is one shorter (2.88 Å) and one longer (3.01 Å) Rb(1)-F(15) bond length. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one F(11), one F(3), one F(4), one F(5), one F(6), one F(7), and one F(8) atom. The Rb(2)-F(11) bond length is 2.84 Å. The Rb(2)-F(3) bond length is 2.86 Å. The Rb(2)-F(4) bond length is 2.89 Å. The Rb(2)-F(5) bond length is 2.91 Å. The Rb(2)-F(6) bond length is 2.78 Å. The Rb(2)-F(7) bond length is 2.86 Å. The Rb(2)-F(8) bond length is 2.72 Å. In the third Rb site, Rb(3) is bonded in a 7-coordinate geometry to one F(1), one F(14), one F(3), one F(6), one F(7), and two equivalent F(10) atoms. The Rb(3)-F(1) bond length is 2.85 Å. The Rb(3)-F(14) bond length is 2.78 Å. The Rb(3)-F(3) bond length is 2.85 Å. The Rb(3)-F(6) bond length is 2.82 Å. The Rb(3)-F(7) bond length is 2.87 Å. There is one shorter (2.79 Å) and one longer (3.01 Å) Rb(3)-F(10) bond length. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 8-coordinate geometry to one F(1), one F(13), one F(2), one F(3), one F(6), one F(7), and two equivalent F(12) atoms. The Tb(1)-F(1) bond length is 2.29 Å. The Tb(1)-F(13) bond length is 2.22 Å. The Tb(1)-F(2) bond length is 2.25 Å. The Tb(1)-F(3) bond length is 2.29 Å. The Tb(1)-F(6) bond length is 2.26 Å. The Tb(1)-F(7) bond length is 2.21 Å. Both Tb(1)-F(12) bond lengths are 2.47 Å. In the second Tb site, Tb(2) is bonded in a 8-coordinate geometry to one F(11), one F(13), one F(14), one F(15), one F(5), one F(9), and two equivalent F(4) atoms. The Tb(2)-F(11) bond length is 2.46 Å. The Tb(2)-F(13) bond length is 2.27 Å. The Tb(2)-F(14) bond length is 2.31 Å. The Tb(2)-F(15) bond length is 2.28 Å. The Tb(2)-F(5) bond length is 2.29 Å. The Tb(2)-F(9) bond length is 2.36 Å. Both Tb(2)-F(4) bond lengths are 2.28 Å. In the third Tb site, Tb(3) is bonded in a 8-coordinate geometry to one F(1), one F(10), one F(15), one F(2), one F(5), one F(6), one F(8), and one F(9) atom. The Tb(3)-F(1) bond length is 2.30 Å. The Tb(3)-F(10) bond length is 2.37 Å. The Tb(3)-F(15) bond length is 2.28 Å. The Tb(3)-F(2) bond length is 2.29 Å. The Tb(3)-F(5) bond length is 2.30 Å. The Tb(3)-F(6) bond length is 2.28 Å. The Tb(3)-F(8) bond length is 2.28 Å. The Tb(3)-F(9) bond length is 2.37 Å. There are fifteen inequivalent F sites. In the first F site, F(1) is bonded to one Rb(1), one Rb(3), one Tb(1), and one Tb(3) atom to form a mixture of corner and edge-sharing FRb2Tb2 tetrahedra. In the second F site, F(2) is bonded in a linear geometry to one Tb(1) and one Tb(3) atom. In the third F site, F(3) is bonded in a 3-coordinate geometry to one Rb(2), one Rb(3), and one Tb(1) atom. In the fourth F site, F(4) is bonded to one Rb(1), one Rb(2), and two equivalent Tb(2) atoms to form a mixture of distorted corner and edge-sharing FRb2Tb2 tetrahedra. In the fifth F site, F(5) is bonded to one Rb(1), one Rb(2), one Tb(2), and one Tb(3) atom to form a mixture of corner and edge-sharing FRb2Tb2 tetrahedra. In the sixth F site, F(6) is bonded to one Rb(2), one Rb(3), one Tb(1), and one Tb(3) atom to form a mixture of corner and edge-sharing FRb2Tb2 tetrahedra. In the seventh F site, F(7) is bonded in a 3-coordinate geometry to one Rb(2), one Rb(3), and one Tb(1) atom. In the eighth F site, F(8) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(2), and one Tb(3) atom. In the ninth F site, F(9) is bonded in a linear geometry to one Tb(2) and one Tb(3) atom. In the tenth F site, F(10) is bonded in a 2-coordinate geometry to one Rb(1), two equivalent Rb(3), and one Tb(3) atom. In the eleventh F site, F(11) is bonded in a 4-coordinate geometry to one Rb(2), two equivalent Rb(1), and one Tb(2) atom. In the twelfth F site, F(12) is bonded in a 2-coordinate geometry to two equivalent Tb(1) atoms. In the thirteenth F site, F(13) is bonded in a linear geometry to one Tb(1) and one Tb(2) atom. In the fourteenth F site, F(14) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(3), and one Tb(2) atom. In the fifteenth F site, F(15) is bonded to two equivalent Rb(1), one Tb(2), and one Tb(3) atom to form a mixture of distorted corner and edge-sharing FRb2Tb2 tetrahedra.