K2Nd(PO3)5 crystallizes in the monoclinic Cc space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one O(11), one O(12), one O(13), one O(14), one O(2), one O(4), one O(6), one O(7), and one O(8) atom. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(11), one O(13), one O(15), one O(2), one O(3), one O(6), one O(7), one O(8), and one O(9) atom. Nd(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(13), one O(14), one O(2), one O(7), one O(8), and one O(9) atom. There are five inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(15), one O(4), and one O(6) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(11), one O(12), one O(5), and one O(8) atom to form corner-sharing PO4 tetrahedra. In the third P site, P(3) is bonded to one O(13), one O(3), one O(4), and one O(7) atom to form corner-sharing PO4 tetrahedra. In the fourth P site, P(4) is bonded to one O(14), one O(15), one O(2), and one O(5) atom to form corner-sharing PO4 tetrahedra. In the fifth P site, P(5) is bonded to one O(1), one O(12), one O(3), and one O(9) atom to form corner-sharing PO4 tetrahedra. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Nd(1) and one P(5) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), one Nd(1), and one P(4) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(2), one P(3), and one P(5) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(1), and one P(3) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one P(2) and one P(4) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one P(1) atom. In the seventh O site, O(7) is bonded in a 1-coordinate geometry to one K(1), one K(2), one Nd(1), and one P(3) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one K(1), one K(2), one Nd(1), and one P(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one K(2), one Nd(1), and one P(5) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Nd(1) and one P(1) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one P(2) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(2), and one P(5) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one K(1), one K(2), one Nd(1), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one K(1), one Nd(1), and one P(4) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 150 degrees geometry to one K(2), one P(1), and one P(4) atom.
K2Nd(PO3)5 crystallizes in the monoclinic Cc space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one O(11), one O(12), one O(13), one O(14), one O(2), one O(4), one O(6), one O(7), and one O(8) atom. The K(1)-O(11) bond length is 2.66 Å. The K(1)-O(12) bond length is 3.20 Å. The K(1)-O(13) bond length is 3.34 Å. The K(1)-O(14) bond length is 3.06 Å. The K(1)-O(2) bond length is 2.91 Å. The K(1)-O(4) bond length is 3.02 Å. The K(1)-O(6) bond length is 2.91 Å. The K(1)-O(7) bond length is 3.18 Å. The K(1)-O(8) bond length is 3.06 Å. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(11), one O(13), one O(15), one O(2), one O(3), one O(6), one O(7), one O(8), and one O(9) atom. The K(2)-O(11) bond length is 2.77 Å. The K(2)-O(13) bond length is 3.10 Å. The K(2)-O(15) bond length is 3.24 Å. The K(2)-O(2) bond length is 3.10 Å. The K(2)-O(3) bond length is 3.14 Å. The K(2)-O(6) bond length is 2.81 Å. The K(2)-O(7) bond length is 3.23 Å. The K(2)-O(8) bond length is 3.12 Å. The K(2)-O(9) bond length is 2.86 Å. Nd(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(13), one O(14), one O(2), one O(7), one O(8), and one O(9) atom. The Nd(1)-O(1) bond length is 2.45 Å. The Nd(1)-O(10) bond length is 2.36 Å. The Nd(1)-O(13) bond length is 2.58 Å. The Nd(1)-O(14) bond length is 2.49 Å. The Nd(1)-O(2) bond length is 2.69 Å. The Nd(1)-O(7) bond length is 2.47 Å. The Nd(1)-O(8) bond length is 2.43 Å. The Nd(1)-O(9) bond length is 2.52 Å. There are five inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(15), one O(4), and one O(6) atom to form corner-sharing PO4 tetrahedra. The P(1)-O(10) bond length is 1.50 Å. The P(1)-O(15) bond length is 1.62 Å. The P(1)-O(4) bond length is 1.63 Å. The P(1)-O(6) bond length is 1.49 Å. In the second P site, P(2) is bonded to one O(11), one O(12), one O(5), and one O(8) atom to form corner-sharing PO4 tetrahedra. The P(2)-O(11) bond length is 1.49 Å. The P(2)-O(12) bond length is 1.63 Å. The P(2)-O(5) bond length is 1.59 Å. The P(2)-O(8) bond length is 1.51 Å. In the third P site, P(3) is bonded to one O(13), one O(3), one O(4), and one O(7) atom to form corner-sharing PO4 tetrahedra. The P(3)-O(13) bond length is 1.50 Å. The P(3)-O(3) bond length is 1.63 Å. The P(3)-O(4) bond length is 1.61 Å. The P(3)-O(7) bond length is 1.50 Å. In the fourth P site, P(4) is bonded to one O(14), one O(15), one O(2), and one O(5) atom to form corner-sharing PO4 tetrahedra. The P(4)-O(14) bond length is 1.51 Å. The P(4)-O(15) bond length is 1.60 Å. The P(4)-O(2) bond length is 1.50 Å. The P(4)-O(5) bond length is 1.60 Å. In the fifth P site, P(5) is bonded to one O(1), one O(12), one O(3), and one O(9) atom to form corner-sharing PO4 tetrahedra. The P(5)-O(1) bond length is 1.50 Å. The P(5)-O(12) bond length is 1.62 Å. The P(5)-O(3) bond length is 1.63 Å. The P(5)-O(9) bond length is 1.50 Å. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Nd(1) and one P(5) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), one Nd(1), and one P(4) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(2), one P(3), and one P(5) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(1), and one P(3) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one P(2) and one P(4) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one P(1) atom. In the seventh O site, O(7) is bonded in a 1-coordinate geometry to one K(1), one K(2), one Nd(1), and one P(3) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one K(1), one K(2), one Nd(1), and one P(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one K(2), one Nd(1), and one P(5) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Nd(1) and one P(1) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one P(2) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(2), and one P(5) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one K(1), one K(2), one Nd(1), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one K(1), one Nd(1), and one P(4) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 150 degrees geometry to one K(2), one P(1), and one P(4) atom.