RbLiMn(BH4)4 crystallizes in the orthorhombic Aea2 space group. Rb(1) is bonded in a 12-coordinate geometry to two equivalent H(1), two equivalent H(2), two equivalent H(3), two equivalent H(5), two equivalent H(7), and two equivalent H(8) atoms. Li(1) is bonded in a 8-coordinate geometry to two equivalent H(1), two equivalent H(2), two equivalent H(3), and two equivalent H(8) atoms. Mn(1) is bonded to two equivalent H(2), two equivalent H(4), two equivalent H(5), and two equivalent H(6) atoms to form distorted MnH8 hexagonal bipyramids that share edges with two equivalent B(1)H4 tetrahedra and edges with two equivalent B(2)H4 tetrahedra. There are two inequivalent B sites. In the first B site, B(1) is bonded to one H(1), one H(2), one H(5), and one H(7) atom to form BH4 tetrahedra that share  an edgeedge with one Mn(1)H8 hexagonal bipyramid. In the second B site, B(2) is bonded to one H(3), one H(4), one H(6), and one H(8) atom to form BH4 tetrahedra that share  an edgeedge with one Mn(1)H8 hexagonal bipyramid. There are eight inequivalent H sites. In the first H site, H(2) is bonded in a distorted single-bond geometry to one Rb(1), one Li(1), one Mn(1), and one B(1) atom. In the second H site, H(3) is bonded in a 2-coordinate geometry to one Rb(1), one Li(1), and one B(2) atom. In the third H site, H(4) is bonded in a distorted L-shaped geometry to one Mn(1) and one B(2) atom. In the fourth H site, H(5) is bonded in a distorted water-like geometry to one Rb(1), one Mn(1), and one B(1) atom. In the fifth H site, H(6) is bonded in an L-shaped geometry to one Mn(1) and one B(2) atom. In the sixth H site, H(7) is bonded in a single-bond geometry to one Rb(1) and one B(1) atom. In the seventh H site, H(8) is bonded in a 2-coordinate geometry to one Rb(1), one Li(1), and one B(2) atom. In the eighth H site, H(1) is bonded in a distorted water-like geometry to one Rb(1), one Li(1), and one B(1) atom.
RbLiMn(BH4)4 crystallizes in the orthorhombic Aea2 space group. Rb(1) is bonded in a 12-coordinate geometry to two equivalent H(1), two equivalent H(2), two equivalent H(3), two equivalent H(5), two equivalent H(7), and two equivalent H(8) atoms. Both Rb(1)-H(1) bond lengths are 3.11 Å. Both Rb(1)-H(2) bond lengths are 2.96 Å. Both Rb(1)-H(3) bond lengths are 2.99 Å. Both Rb(1)-H(5) bond lengths are 3.16 Å. Both Rb(1)-H(7) bond lengths are 3.06 Å. Both Rb(1)-H(8) bond lengths are 3.03 Å. Li(1) is bonded in a 8-coordinate geometry to two equivalent H(1), two equivalent H(2), two equivalent H(3), and two equivalent H(8) atoms. Both Li(1)-H(1) bond lengths are 2.01 Å. Both Li(1)-H(2) bond lengths are 2.22 Å. Both Li(1)-H(3) bond lengths are 2.08 Å. Both Li(1)-H(8) bond lengths are 2.11 Å. Mn(1) is bonded to two equivalent H(2), two equivalent H(4), two equivalent H(5), and two equivalent H(6) atoms to form distorted MnH8 hexagonal bipyramids that share edges with two equivalent B(1)H4 tetrahedra and edges with two equivalent B(2)H4 tetrahedra. Both Mn(1)-H(2) bond lengths are 2.10 Å. Both Mn(1)-H(4) bond lengths are 2.03 Å. Both Mn(1)-H(5) bond lengths are 1.97 Å. Both Mn(1)-H(6) bond lengths are 2.01 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded to one H(1), one H(2), one H(5), and one H(7) atom to form BH4 tetrahedra that share  an edgeedge with one Mn(1)H8 hexagonal bipyramid. The B(1)-H(1) bond length is 1.22 Å. The B(1)-H(2) bond length is 1.24 Å. The B(1)-H(5) bond length is 1.25 Å. The B(1)-H(7) bond length is 1.21 Å. In the second B site, B(2) is bonded to one H(3), one H(4), one H(6), and one H(8) atom to form BH4 tetrahedra that share  an edgeedge with one Mn(1)H8 hexagonal bipyramid. The B(2)-H(3) bond length is 1.22 Å. The B(2)-H(4) bond length is 1.25 Å. The B(2)-H(6) bond length is 1.24 Å. The B(2)-H(8) bond length is 1.22 Å. There are eight inequivalent H sites. In the first H site, H(2) is bonded in a distorted single-bond geometry to one Rb(1), one Li(1), one Mn(1), and one B(1) atom. In the second H site, H(3) is bonded in a 2-coordinate geometry to one Rb(1), one Li(1), and one B(2) atom. In the third H site, H(4) is bonded in a distorted L-shaped geometry to one Mn(1) and one B(2) atom. In the fourth H site, H(5) is bonded in a distorted water-like geometry to one Rb(1), one Mn(1), and one B(1) atom. In the fifth H site, H(6) is bonded in an L-shaped geometry to one Mn(1) and one B(2) atom. In the sixth H site, H(7) is bonded in a single-bond geometry to one Rb(1) and one B(1) atom. In the seventh H site, H(8) is bonded in a 2-coordinate geometry to one Rb(1), one Li(1), and one B(2) atom. In the eighth H site, H(1) is bonded in a distorted water-like geometry to one Rb(1), one Li(1), and one B(1) atom.