CsGa2P5O16 crystallizes in the monoclinic Pc space group. Cs(1) is bonded in a 12-coordinate geometry to one O(10), one O(11), one O(13), one O(16), one O(2), one O(3), one O(5), one O(6), one O(7), one O(9), and two equivalent O(14) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(10), one O(12), one O(13), one O(15), one O(16), and one O(6) atom to form GaO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. In the second Ga site, Ga(2) is bonded to one O(11), one O(14), one O(3), one O(5), one O(7), and one O(9) atom to form GaO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. There are five inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), one O(16), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Ga(2)O6 octahedra, corners with two equivalent Ga(1)O6 octahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-49°. In the second P site, P(2) is bonded to one O(1), one O(4), one O(6), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Ga(1)O6 octahedra,  a cornercorner with one Ga(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-52°. In the third P site, P(3) is bonded to one O(14), one O(15), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Ga(1)O6 octahedra, corners with two equivalent Ga(2)O6 octahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 29-45°. In the fourth P site, P(4) is bonded to one O(13), one O(2), one O(4), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Ga(1)O6 octahedra,  a cornercorner with one Ga(2)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 8-59°. In the fifth P site, P(5) is bonded to one O(11), one O(12), one O(2), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Ga(1)O6 octahedra,  a cornercorner with one Ga(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-55°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cs(1), one P(4), and one P(5) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one P(2) and one P(4) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Cs(1), one Ga(2), and one P(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Cs(1), one Ga(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted linear geometry to one Cs(1), one Ga(2), and one P(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one P(3) and one P(5) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(2), and one P(2) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Cs(1), one Ga(1), and one P(1) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(2), and one P(5) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Ga(1) and one P(5) atom. In the thirteenth O site, O(13) is bonded in a 2-coordinate geometry to one Cs(1), one Ga(1), and one P(4) atom. In the fourteenth O site, O(14) is bonded in a 2-coordinate geometry to two equivalent Cs(1), one Ga(2), and one P(3) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one Ga(1) and one P(3) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 150 degrees geometry to one Cs(1), one Ga(1), and one P(1) atom.
CsGa2P5O16 crystallizes in the monoclinic Pc space group. Cs(1) is bonded in a 12-coordinate geometry to one O(10), one O(11), one O(13), one O(16), one O(2), one O(3), one O(5), one O(6), one O(7), one O(9), and two equivalent O(14) atoms. The Cs(1)-O(10) bond length is 3.23 Å. The Cs(1)-O(11) bond length is 3.20 Å. The Cs(1)-O(13) bond length is 3.13 Å. The Cs(1)-O(16) bond length is 3.30 Å. The Cs(1)-O(2) bond length is 3.62 Å. The Cs(1)-O(3) bond length is 3.29 Å. The Cs(1)-O(5) bond length is 3.22 Å. The Cs(1)-O(6) bond length is 3.73 Å. The Cs(1)-O(7) bond length is 3.67 Å. The Cs(1)-O(9) bond length is 3.73 Å. There is one shorter (3.45 Å) and one longer (3.70 Å) Cs(1)-O(14) bond length. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(10), one O(12), one O(13), one O(15), one O(16), and one O(6) atom to form GaO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. The Ga(1)-O(10) bond length is 1.94 Å. The Ga(1)-O(12) bond length is 2.01 Å. The Ga(1)-O(13) bond length is 2.06 Å. The Ga(1)-O(15) bond length is 1.95 Å. The Ga(1)-O(16) bond length is 1.94 Å. The Ga(1)-O(6) bond length is 2.08 Å. In the second Ga site, Ga(2) is bonded to one O(11), one O(14), one O(3), one O(5), one O(7), and one O(9) atom to form GaO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. The Ga(2)-O(11) bond length is 1.98 Å. The Ga(2)-O(14) bond length is 1.99 Å. The Ga(2)-O(3) bond length is 1.91 Å. The Ga(2)-O(5) bond length is 1.96 Å. The Ga(2)-O(7) bond length is 2.13 Å. The Ga(2)-O(9) bond length is 2.03 Å. There are five inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), one O(16), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Ga(2)O6 octahedra, corners with two equivalent Ga(1)O6 octahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-49°. The P(1)-O(1) bond length is 1.65 Å. The P(1)-O(10) bond length is 1.51 Å. The P(1)-O(16) bond length is 1.52 Å. The P(1)-O(3) bond length is 1.53 Å. In the second P site, P(2) is bonded to one O(1), one O(4), one O(6), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Ga(1)O6 octahedra,  a cornercorner with one Ga(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-52°. The P(2)-O(1) bond length is 1.60 Å. The P(2)-O(4) bond length is 1.63 Å. The P(2)-O(6) bond length is 1.50 Å. The P(2)-O(9) bond length is 1.51 Å. In the third P site, P(3) is bonded to one O(14), one O(15), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Ga(1)O6 octahedra, corners with two equivalent Ga(2)O6 octahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 29-45°. The P(3)-O(14) bond length is 1.53 Å. The P(3)-O(15) bond length is 1.52 Å. The P(3)-O(5) bond length is 1.53 Å. The P(3)-O(8) bond length is 1.65 Å. In the fourth P site, P(4) is bonded to one O(13), one O(2), one O(4), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Ga(1)O6 octahedra,  a cornercorner with one Ga(2)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 8-59°. The P(4)-O(13) bond length is 1.51 Å. The P(4)-O(2) bond length is 1.62 Å. The P(4)-O(4) bond length is 1.62 Å. The P(4)-O(7) bond length is 1.48 Å. In the fifth P site, P(5) is bonded to one O(11), one O(12), one O(2), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Ga(1)O6 octahedra,  a cornercorner with one Ga(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-55°. The P(5)-O(11) bond length is 1.52 Å. The P(5)-O(12) bond length is 1.51 Å. The P(5)-O(2) bond length is 1.62 Å. The P(5)-O(8) bond length is 1.58 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cs(1), one P(4), and one P(5) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one P(2) and one P(4) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Cs(1), one Ga(2), and one P(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Cs(1), one Ga(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted linear geometry to one Cs(1), one Ga(2), and one P(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one P(3) and one P(5) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(2), and one P(2) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Cs(1), one Ga(1), and one P(1) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(2), and one P(5) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Ga(1) and one P(5) atom. In the thirteenth O site, O(13) is bonded in a 2-coordinate geometry to one Cs(1), one Ga(1), and one P(4) atom. In the fourteenth O site, O(14) is bonded in a 2-coordinate geometry to two equivalent Cs(1), one Ga(2), and one P(3) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one Ga(1) and one P(3) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 150 degrees geometry to one Cs(1), one Ga(1), and one P(1) atom.