Rb2GaSb2 is Magnesium tetraboride-derived structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to one Ga(1), one Ga(2), one Sb(1), one Sb(3), two equivalent Sb(2), and two equivalent Sb(4) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one Ga(1), one Ga(2), one Sb(2), one Sb(4), two equivalent Sb(1), and two equivalent Sb(3) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a distorted trigonal planar geometry to two equivalent Rb(1), two equivalent Rb(2), one Sb(2), one Sb(3), and one Sb(4) atom. In the second Ga site, Ga(2) is bonded in a 7-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Sb(1), one Sb(3), and one Sb(4) atom. There are four inequivalent Sb sites. In the first Sb site, Sb(3) is bonded in a 8-coordinate geometry to two equivalent Rb(1), four equivalent Rb(2), one Ga(1), and one Ga(2) atom. In the second Sb site, Sb(4) is bonded in a 8-coordinate geometry to two equivalent Rb(2), four equivalent Rb(1), one Ga(1), and one Ga(2) atom. In the third Sb site, Sb(1) is bonded in a 8-coordinate geometry to two equivalent Rb(1), four equivalent Rb(2), one Ga(2), and one Sb(2) atom. In the fourth Sb site, Sb(2) is bonded in a 8-coordinate geometry to two equivalent Rb(2), four equivalent Rb(1), one Ga(1), and one Sb(1) atom.
Rb2GaSb2 is Magnesium tetraboride-derived structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to one Ga(1), one Ga(2), one Sb(1), one Sb(3), two equivalent Sb(2), and two equivalent Sb(4) atoms. The Rb(1)-Ga(1) bond length is 4.00 Å. The Rb(1)-Ga(2) bond length is 3.88 Å. The Rb(1)-Sb(1) bond length is 3.92 Å. The Rb(1)-Sb(3) bond length is 4.15 Å. There is one shorter (4.02 Å) and one longer (4.12 Å) Rb(1)-Sb(2) bond length. There is one shorter (3.84 Å) and one longer (3.98 Å) Rb(1)-Sb(4) bond length. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one Ga(1), one Ga(2), one Sb(2), one Sb(4), two equivalent Sb(1), and two equivalent Sb(3) atoms. The Rb(2)-Ga(1) bond length is 3.76 Å. The Rb(2)-Ga(2) bond length is 3.75 Å. The Rb(2)-Sb(2) bond length is 3.82 Å. The Rb(2)-Sb(4) bond length is 3.64 Å. There is one shorter (3.70 Å) and one longer (3.76 Å) Rb(2)-Sb(1) bond length. There is one shorter (3.76 Å) and one longer (4.05 Å) Rb(2)-Sb(3) bond length. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a distorted trigonal planar geometry to two equivalent Rb(1), two equivalent Rb(2), one Sb(2), one Sb(3), and one Sb(4) atom. The Ga(1)-Sb(2) bond length is 2.60 Å. The Ga(1)-Sb(3) bond length is 2.65 Å. The Ga(1)-Sb(4) bond length is 2.63 Å. In the second Ga site, Ga(2) is bonded in a 7-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Sb(1), one Sb(3), and one Sb(4) atom. The Ga(2)-Sb(1) bond length is 2.58 Å. The Ga(2)-Sb(3) bond length is 2.58 Å. The Ga(2)-Sb(4) bond length is 2.59 Å. There are four inequivalent Sb sites. In the first Sb site, Sb(3) is bonded in a 8-coordinate geometry to two equivalent Rb(1), four equivalent Rb(2), one Ga(1), and one Ga(2) atom. In the second Sb site, Sb(4) is bonded in a 8-coordinate geometry to two equivalent Rb(2), four equivalent Rb(1), one Ga(1), and one Ga(2) atom. In the third Sb site, Sb(1) is bonded in a 8-coordinate geometry to two equivalent Rb(1), four equivalent Rb(2), one Ga(2), and one Sb(2) atom. The Sb(1)-Sb(2) bond length is 2.85 Å. In the fourth Sb site, Sb(2) is bonded in a 8-coordinate geometry to two equivalent Rb(2), four equivalent Rb(1), one Ga(1), and one Sb(1) atom.