RbNa5Be8O11 crystallizes in the triclinic P-1 space group. Rb(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(3), one O(5), and one O(8) atom. There are five inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(10), one O(3), one O(7), and two equivalent O(4) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(11), one O(4), two equivalent O(6), and two equivalent O(9) atoms. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one O(10), one O(3), one O(7), and two equivalent O(8) atoms. In the fourth Na site, Na(4) is bonded in a 5-coordinate geometry to one O(11), one O(3), one O(4), one O(6), and one O(9) atom. In the fifth Na site, Na(5) is bonded in a 6-coordinate geometry to one O(7), one O(8), two equivalent O(1), and two equivalent O(2) atoms. There are eight inequivalent Be sites. In the first Be site, Be(1) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form a mixture of corner and edge-sharing BeO4 tetrahedra. In the second Be site, Be(2) is bonded in a trigonal planar geometry to one O(3), one O(5), and one O(7) atom. In the third Be site, Be(3) is bonded in a trigonal planar geometry to one O(1), one O(10), and one O(8) atom. In the fourth Be site, Be(4) is bonded in a trigonal planar geometry to one O(4), one O(7), and one O(9) atom. In the fifth Be site, Be(5) is bonded to one O(1), one O(5), one O(6), and one O(9) atom to form a mixture of corner and edge-sharing BeO4 tetrahedra. In the sixth Be site, Be(6) is bonded in a trigonal planar geometry to one O(10), one O(11), and one O(3) atom. In the seventh Be site, Be(7) is bonded to one O(1), one O(11), one O(2), and one O(9) atom to form a mixture of corner and edge-sharing BeO4 tetrahedra. In the eighth Be site, Be(8) is bonded to one O(11), one O(2), one O(6), and one O(8) atom to form a mixture of corner and edge-sharing BeO4 tetrahedra. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Rb(1), two equivalent Na(5), one Be(3), one Be(5), and one Be(7) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Na(5), one Be(1), one Be(7), and one Be(8) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Rb(1), one Na(1), one Na(3), one Na(4), one Be(2), and one Be(6) atom. In the fourth O site, O(4) is bonded to one Na(2), one Na(4), two equivalent Na(1), one Be(1), and one Be(4) atom to form distorted edge-sharing ONa4Be2 octahedra. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Rb(1), one Be(1), one Be(2), and one Be(5) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(4), two equivalent Na(2), one Be(1), one Be(5), and one Be(8) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Na(1), one Na(3), one Na(5), one Be(2), and one Be(4) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one Rb(1), one Na(5), two equivalent Na(3), one Be(3), and one Be(8) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(4), two equivalent Na(2), one Be(4), one Be(5), and one Be(7) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Na(1), one Na(3), one Be(3), and one Be(6) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Na(2), one Na(4), one Be(6), one Be(7), and one Be(8) atom.
RbNa5Be8O11 crystallizes in the triclinic P-1 space group. Rb(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(3), one O(5), and one O(8) atom. The Rb(1)-O(1) bond length is 2.81 Å. The Rb(1)-O(10) bond length is 2.91 Å. The Rb(1)-O(3) bond length is 2.95 Å. The Rb(1)-O(5) bond length is 2.84 Å. The Rb(1)-O(8) bond length is 2.82 Å. There are five inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(10), one O(3), one O(7), and two equivalent O(4) atoms. The Na(1)-O(10) bond length is 2.44 Å. The Na(1)-O(3) bond length is 2.50 Å. The Na(1)-O(7) bond length is 2.41 Å. There is one shorter (2.32 Å) and one longer (2.38 Å) Na(1)-O(4) bond length. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(11), one O(4), two equivalent O(6), and two equivalent O(9) atoms. The Na(2)-O(11) bond length is 2.66 Å. The Na(2)-O(4) bond length is 2.44 Å. There is one shorter (2.35 Å) and one longer (2.73 Å) Na(2)-O(6) bond length. There is one shorter (2.43 Å) and one longer (2.57 Å) Na(2)-O(9) bond length. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one O(10), one O(3), one O(7), and two equivalent O(8) atoms. The Na(3)-O(10) bond length is 2.50 Å. The Na(3)-O(3) bond length is 2.50 Å. The Na(3)-O(7) bond length is 2.37 Å. There is one shorter (2.32 Å) and one longer (2.50 Å) Na(3)-O(8) bond length. In the fourth Na site, Na(4) is bonded in a 5-coordinate geometry to one O(11), one O(3), one O(4), one O(6), and one O(9) atom. The Na(4)-O(11) bond length is 2.66 Å. The Na(4)-O(3) bond length is 2.39 Å. The Na(4)-O(4) bond length is 2.47 Å. The Na(4)-O(6) bond length is 2.71 Å. The Na(4)-O(9) bond length is 2.69 Å. In the fifth Na site, Na(5) is bonded in a 6-coordinate geometry to one O(7), one O(8), two equivalent O(1), and two equivalent O(2) atoms. The Na(5)-O(7) bond length is 2.90 Å. The Na(5)-O(8) bond length is 2.41 Å. There is one shorter (2.43 Å) and one longer (2.68 Å) Na(5)-O(1) bond length. There is one shorter (2.57 Å) and one longer (2.67 Å) Na(5)-O(2) bond length. There are eight inequivalent Be sites. In the first Be site, Be(1) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form a mixture of corner and edge-sharing BeO4 tetrahedra. The Be(1)-O(2) bond length is 1.66 Å. The Be(1)-O(4) bond length is 1.61 Å. The Be(1)-O(5) bond length is 1.65 Å. The Be(1)-O(6) bond length is 1.72 Å. In the second Be site, Be(2) is bonded in a trigonal planar geometry to one O(3), one O(5), and one O(7) atom. The Be(2)-O(3) bond length is 1.54 Å. The Be(2)-O(5) bond length is 1.56 Å. The Be(2)-O(7) bond length is 1.55 Å. In the third Be site, Be(3) is bonded in a trigonal planar geometry to one O(1), one O(10), and one O(8) atom. The Be(3)-O(1) bond length is 1.59 Å. The Be(3)-O(10) bond length is 1.55 Å. The Be(3)-O(8) bond length is 1.56 Å. In the fourth Be site, Be(4) is bonded in a trigonal planar geometry to one O(4), one O(7), and one O(9) atom. The Be(4)-O(4) bond length is 1.57 Å. The Be(4)-O(7) bond length is 1.55 Å. The Be(4)-O(9) bond length is 1.59 Å. In the fifth Be site, Be(5) is bonded to one O(1), one O(5), one O(6), and one O(9) atom to form a mixture of corner and edge-sharing BeO4 tetrahedra. The Be(5)-O(1) bond length is 1.67 Å. The Be(5)-O(5) bond length is 1.63 Å. The Be(5)-O(6) bond length is 1.65 Å. The Be(5)-O(9) bond length is 1.64 Å. In the sixth Be site, Be(6) is bonded in a trigonal planar geometry to one O(10), one O(11), and one O(3) atom. The Be(6)-O(10) bond length is 1.55 Å. The Be(6)-O(11) bond length is 1.55 Å. The Be(6)-O(3) bond length is 1.54 Å. In the seventh Be site, Be(7) is bonded to one O(1), one O(11), one O(2), and one O(9) atom to form a mixture of corner and edge-sharing BeO4 tetrahedra. The Be(7)-O(1) bond length is 1.65 Å. The Be(7)-O(11) bond length is 1.64 Å. The Be(7)-O(2) bond length is 1.66 Å. The Be(7)-O(9) bond length is 1.69 Å. In the eighth Be site, Be(8) is bonded to one O(11), one O(2), one O(6), and one O(8) atom to form a mixture of corner and edge-sharing BeO4 tetrahedra. The Be(8)-O(11) bond length is 1.65 Å. The Be(8)-O(2) bond length is 1.77 Å. The Be(8)-O(6) bond length is 1.65 Å. The Be(8)-O(8) bond length is 1.62 Å. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Rb(1), two equivalent Na(5), one Be(3), one Be(5), and one Be(7) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Na(5), one Be(1), one Be(7), and one Be(8) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Rb(1), one Na(1), one Na(3), one Na(4), one Be(2), and one Be(6) atom. In the fourth O site, O(4) is bonded to one Na(2), one Na(4), two equivalent Na(1), one Be(1), and one Be(4) atom to form distorted edge-sharing ONa4Be2 octahedra. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Rb(1), one Be(1), one Be(2), and one Be(5) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(4), two equivalent Na(2), one Be(1), one Be(5), and one Be(8) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Na(1), one Na(3), one Na(5), one Be(2), and one Be(4) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one Rb(1), one Na(5), two equivalent Na(3), one Be(3), and one Be(8) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(4), two equivalent Na(2), one Be(4), one Be(5), and one Be(7) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Na(1), one Na(3), one Be(3), and one Be(6) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Na(2), one Na(4), one Be(6), one Be(7), and one Be(8) atom.