KCoP3O9 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(13), one O(14), one O(15), one O(16), one O(18), one O(4), one O(5), and one O(7) atom. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(1), one O(15), one O(2), one O(3), one O(4), one O(8), and one O(9) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(5), one O(8), and one O(9) atom. In the second Co site, Co(2) is bonded to one O(10), one O(13), one O(14), one O(18), one O(3), and one O(7) atom to form CoO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  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  a cornercorner with one P(6)O4 tetrahedra. There are six inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(17), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and  a cornercorner with one P(6)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the second P site, P(2) is bonded to one O(16), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 38°. In the third P site, P(3) is bonded to one O(12), one O(13), one O(17), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(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 are 40°. In the fourth P site, P(4) is bonded to one O(10), one O(11), one O(12), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 28°. In the fifth P site, P(5) is bonded to one O(1), one O(14), one O(16), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(6)O4 tetrahedra. The corner-sharing octahedral tilt angles are 35°. In the sixth P site, P(6) is bonded to one O(15), one O(18), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 27°. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(2), one Co(1), and one P(5) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(2), one Co(1), and one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(2), one Co(2), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one K(1), one Co(1), one P(5), and one P(6) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(1) and one P(6) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one K(1), one Co(2), and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one K(2), one Co(1), and one P(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one K(2), one Co(1), and one P(3) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Co(2) and one P(4) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one P(1) and one P(4) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one P(3) and one P(4) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one K(1), one Co(2), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one K(1), one Co(2), and one P(5) atom. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one P(6) atom. In the sixteenth O site, O(16) is bonded in a bent 120 degrees geometry to one K(1), one P(2), and one P(5) atom. In the seventeenth O site, O(17) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the eighteenth O site, O(18) is bonded in a 3-coordinate geometry to one K(1), one Co(2), and one P(6) atom.
KCoP3O9 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(13), one O(14), one O(15), one O(16), one O(18), one O(4), one O(5), and one O(7) atom. The K(1)-O(13) bond length is 2.70 Å. The K(1)-O(14) bond length is 2.84 Å. The K(1)-O(15) bond length is 3.11 Å. The K(1)-O(16) bond length is 3.26 Å. The K(1)-O(18) bond length is 2.74 Å. The K(1)-O(4) bond length is 2.63 Å. The K(1)-O(5) bond length is 3.22 Å. The K(1)-O(7) bond length is 2.62 Å. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(1), one O(15), one O(2), one O(3), one O(4), one O(8), and one O(9) atom. The K(2)-O(1) bond length is 3.03 Å. The K(2)-O(15) bond length is 2.78 Å. The K(2)-O(2) bond length is 2.90 Å. The K(2)-O(3) bond length is 3.03 Å. The K(2)-O(4) bond length is 2.73 Å. The K(2)-O(8) bond length is 2.95 Å. The K(2)-O(9) bond length is 3.03 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(5), one O(8), and one O(9) atom. The Co(1)-O(1) bond length is 2.07 Å. The Co(1)-O(2) bond length is 1.95 Å. The Co(1)-O(5) bond length is 2.51 Å. The Co(1)-O(8) bond length is 2.04 Å. The Co(1)-O(9) bond length is 2.08 Å. In the second Co site, Co(2) is bonded to one O(10), one O(13), one O(14), one O(18), one O(3), and one O(7) atom to form CoO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  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  a cornercorner with one P(6)O4 tetrahedra. The Co(2)-O(10) bond length is 2.14 Å. The Co(2)-O(13) bond length is 2.23 Å. The Co(2)-O(14) bond length is 2.14 Å. The Co(2)-O(18) bond length is 2.03 Å. The Co(2)-O(3) bond length is 2.04 Å. The Co(2)-O(7) bond length is 2.19 Å. There are six inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(17), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and  a cornercorner with one P(6)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. The P(1)-O(11) bond length is 1.57 Å. The P(1)-O(17) bond length is 1.59 Å. The P(1)-O(6) bond length is 1.57 Å. The P(1)-O(7) bond length is 1.49 Å. In the second P site, P(2) is bonded to one O(16), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 38°. The P(2)-O(16) bond length is 1.72 Å. The P(2)-O(2) bond length is 1.55 Å. The P(2)-O(3) bond length is 1.53 Å. The P(2)-O(4) bond length is 1.50 Å. In the third P site, P(3) is bonded to one O(12), one O(13), one O(17), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(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 are 40°. The P(3)-O(12) bond length is 1.62 Å. The P(3)-O(13) bond length is 1.49 Å. The P(3)-O(17) bond length is 1.65 Å. The P(3)-O(9) bond length is 1.51 Å. In the fourth P site, P(4) is bonded to one O(10), one O(11), one O(12), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 28°. The P(4)-O(10) bond length is 1.47 Å. The P(4)-O(11) bond length is 1.66 Å. The P(4)-O(12) bond length is 1.61 Å. The P(4)-O(8) bond length is 1.51 Å. In the fifth P site, P(5) is bonded to one O(1), one O(14), one O(16), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(6)O4 tetrahedra. The corner-sharing octahedral tilt angles are 35°. The P(5)-O(1) bond length is 1.52 Å. The P(5)-O(14) bond length is 1.50 Å. The P(5)-O(16) bond length is 1.57 Å. The P(5)-O(5) bond length is 1.67 Å. In the sixth P site, P(6) is bonded to one O(15), one O(18), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 27°. The P(6)-O(15) bond length is 1.48 Å. The P(6)-O(18) bond length is 1.49 Å. The P(6)-O(5) bond length is 1.62 Å. The P(6)-O(6) bond length is 1.69 Å. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(2), one Co(1), and one P(5) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(2), one Co(1), and one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(2), one Co(2), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one K(1), one Co(1), one P(5), and one P(6) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(1) and one P(6) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one K(1), one Co(2), and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one K(2), one Co(1), and one P(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one K(2), one Co(1), and one P(3) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Co(2) and one P(4) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one P(1) and one P(4) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one P(3) and one P(4) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one K(1), one Co(2), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one K(1), one Co(2), and one P(5) atom. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one P(6) atom. In the sixteenth O site, O(16) is bonded in a bent 120 degrees geometry to one K(1), one P(2), and one P(5) atom. In the seventeenth O site, O(17) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the eighteenth O site, O(18) is bonded in a 3-coordinate geometry to one K(1), one Co(2), and one P(6) atom.