Cs2Li2B2P4O15 crystallizes in the triclinic P-1 space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 6-coordinate geometry to one O(13), one O(15), one O(2), one O(7), and two equivalent O(10) atoms. In the second Cs site, Cs(2) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(15), one O(2), one O(3), one O(7), and one O(9) atom. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(10), one O(13), one O(15), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(14), one O(2), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. There are two inequivalent B sites. In the first B site, B(1) is bonded to one O(12), one O(14), one O(4), and one O(9) atom to form BO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. In the second B site, B(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form BO4 tetrahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one B(1)O4 tetrahedra, and corners with two equivalent B(2)O4 tetrahedra. In the second P site, P(2) is bonded to one O(12), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one B(1)O4 tetrahedra, and corners with two equivalent B(2)O4 tetrahedra. In the third P site, P(3) is bonded to one O(10), one O(11), one O(8), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent Li(1)O4 tetrahedra. In the fourth P site, P(4) is bonded to one O(11), one O(13), one O(14), and one O(15) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent Li(1)O4 tetrahedra. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cs(2), one B(2), and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Cs(2), one Li(2), and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cs(2), one B(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one B(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one B(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one B(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Cs(2), one Li(2), and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Li(1), one Li(2), and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Cs(2), one B(1), and one P(3) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to two equivalent Cs(1), one Li(1), and one P(3) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one P(3) and one P(4) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Cs(2), one B(1), and one P(2) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 150 degrees geometry to one Cs(1), one Li(1), and one P(4) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Li(2), one B(1), and one P(4) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Cs(2), one Li(1), and one P(4) atom.
Cs2Li2B2P4O15 crystallizes in the triclinic P-1 space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 6-coordinate geometry to one O(13), one O(15), one O(2), one O(7), and two equivalent O(10) atoms. The Cs(1)-O(13) bond length is 3.18 Å. The Cs(1)-O(15) bond length is 3.19 Å. The Cs(1)-O(2) bond length is 3.23 Å. The Cs(1)-O(7) bond length is 3.50 Å. There is one shorter (3.19 Å) and one longer (3.28 Å) Cs(1)-O(10) bond length. In the second Cs site, Cs(2) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(15), one O(2), one O(3), one O(7), and one O(9) atom. The Cs(2)-O(1) bond length is 3.42 Å. The Cs(2)-O(12) bond length is 3.30 Å. The Cs(2)-O(15) bond length is 3.65 Å. The Cs(2)-O(2) bond length is 3.59 Å. The Cs(2)-O(3) bond length is 3.51 Å. The Cs(2)-O(7) bond length is 3.39 Å. The Cs(2)-O(9) bond length is 3.26 Å. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(10), one O(13), one O(15), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. The Li(1)-O(10) bond length is 2.03 Å. The Li(1)-O(13) bond length is 1.96 Å. The Li(1)-O(15) bond length is 1.99 Å. The Li(1)-O(8) bond length is 2.06 Å. In the second Li site, Li(2) is bonded to one O(14), one O(2), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The Li(2)-O(14) bond length is 2.24 Å. The Li(2)-O(2) bond length is 1.99 Å. The Li(2)-O(7) bond length is 1.90 Å. The Li(2)-O(8) bond length is 1.97 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded to one O(12), one O(14), one O(4), and one O(9) atom to form BO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The B(1)-O(12) bond length is 1.48 Å. The B(1)-O(14) bond length is 1.48 Å. The B(1)-O(4) bond length is 1.46 Å. The B(1)-O(9) bond length is 1.49 Å. In the second B site, B(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form BO4 tetrahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. The B(2)-O(1) bond length is 1.48 Å. The B(2)-O(3) bond length is 1.48 Å. The B(2)-O(5) bond length is 1.48 Å. The B(2)-O(6) bond length is 1.46 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one B(1)O4 tetrahedra, and corners with two equivalent B(2)O4 tetrahedra. The P(1)-O(1) bond length is 1.58 Å. The P(1)-O(2) bond length is 1.50 Å. The P(1)-O(3) bond length is 1.57 Å. The P(1)-O(4) bond length is 1.56 Å. In the second P site, P(2) is bonded to one O(12), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one B(1)O4 tetrahedra, and corners with two equivalent B(2)O4 tetrahedra. The P(2)-O(12) bond length is 1.57 Å. The P(2)-O(5) bond length is 1.56 Å. The P(2)-O(6) bond length is 1.56 Å. The P(2)-O(7) bond length is 1.50 Å. In the third P site, P(3) is bonded to one O(10), one O(11), one O(8), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent Li(1)O4 tetrahedra. The P(3)-O(10) bond length is 1.51 Å. The P(3)-O(11) bond length is 1.64 Å. The P(3)-O(8) bond length is 1.51 Å. The P(3)-O(9) bond length is 1.60 Å. In the fourth P site, P(4) is bonded to one O(11), one O(13), one O(14), and one O(15) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent Li(1)O4 tetrahedra. The P(4)-O(11) bond length is 1.64 Å. The P(4)-O(13) bond length is 1.50 Å. The P(4)-O(14) bond length is 1.61 Å. The P(4)-O(15) bond length is 1.51 Å. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cs(2), one B(2), and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Cs(2), one Li(2), and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cs(2), one B(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one B(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one B(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one B(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Cs(2), one Li(2), and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Li(1), one Li(2), and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Cs(2), one B(1), and one P(3) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to two equivalent Cs(1), one Li(1), and one P(3) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one P(3) and one P(4) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Cs(2), one B(1), and one P(2) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 150 degrees geometry to one Cs(1), one Li(1), and one P(4) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Li(2), one B(1), and one P(4) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Cs(2), one Li(1), and one P(4) atom.