NaPtP2O9 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 3-coordinate geometry to one O(11), one O(16), and one O(17) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(12), one O(13), one O(15), one O(18), one O(4), and one O(6) atom. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(9) atom to form PtO5 square pyramids that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. In the second Pt site, Pt(2) is bonded to one O(10), one O(5), one O(6), one O(7), and one O(8) atom to form PtO5 square pyramids that share corners with two equivalent P(3)O4 tetrahedra and corners with two equivalent P(4)O4 tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(11), one O(12), and one O(2) atom to form PO4 tetrahedra that share corners with two equivalent Pt(1)O5 square pyramids. In the second P site, P(2) is bonded to one O(13), one O(14), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with two equivalent Pt(1)O5 square pyramids. In the third P site, P(3) is bonded to one O(15), one O(16), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Pt(2)O5 square pyramids. In the fourth P site, P(4) is bonded to one O(17), one O(18), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Pt(2)O5 square pyramids. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Pt(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Pt(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Pt(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Na(2), one Pt(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Pt(2) and one P(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(2), one Pt(2), and one P(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Pt(2) and one P(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Pt(2) and one P(4) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one Pt(1) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one Pt(2) atom. In the eleventh O site, O(11) is bonded in a distorted bent 150 degrees geometry to one Na(1) and one P(1) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Na(2) and one P(1) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Na(2) and one P(2) atom. In the fourteenth O site, O(14) is bonded in a single-bond geometry to one P(2) atom. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one Na(2) and one P(3) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one Na(1) and one P(3) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one P(4) atom. In the eighteenth O site, O(18) is bonded in a 1-coordinate geometry to one Na(2) and one P(4) atom.
NaPtP2O9 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 3-coordinate geometry to one O(11), one O(16), and one O(17) atom. The Na(1)-O(11) bond length is 2.33 Å. The Na(1)-O(16) bond length is 2.39 Å. The Na(1)-O(17) bond length is 2.50 Å. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(12), one O(13), one O(15), one O(18), one O(4), and one O(6) atom. The Na(2)-O(12) bond length is 2.72 Å. The Na(2)-O(13) bond length is 2.41 Å. The Na(2)-O(15) bond length is 2.76 Å. The Na(2)-O(18) bond length is 2.53 Å. The Na(2)-O(4) bond length is 2.97 Å. The Na(2)-O(6) bond length is 2.73 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(9) atom to form PtO5 square pyramids that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. The Pt(1)-O(1) bond length is 1.98 Å. The Pt(1)-O(2) bond length is 2.00 Å. The Pt(1)-O(3) bond length is 2.01 Å. The Pt(1)-O(4) bond length is 2.01 Å. The Pt(1)-O(9) bond length is 1.98 Å. In the second Pt site, Pt(2) is bonded to one O(10), one O(5), one O(6), one O(7), and one O(8) atom to form PtO5 square pyramids that share corners with two equivalent P(3)O4 tetrahedra and corners with two equivalent P(4)O4 tetrahedra. The Pt(2)-O(10) bond length is 1.97 Å. The Pt(2)-O(5) bond length is 2.01 Å. The Pt(2)-O(6) bond length is 1.98 Å. The Pt(2)-O(7) bond length is 2.00 Å. The Pt(2)-O(8) bond length is 1.98 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(11), one O(12), and one O(2) atom to form PO4 tetrahedra that share corners with two equivalent Pt(1)O5 square pyramids. The P(1)-O(1) bond length is 1.61 Å. The P(1)-O(11) bond length is 1.51 Å. The P(1)-O(12) bond length is 1.52 Å. The P(1)-O(2) bond length is 1.60 Å. In the second P site, P(2) is bonded to one O(13), one O(14), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with two equivalent Pt(1)O5 square pyramids. The P(2)-O(13) bond length is 1.52 Å. The P(2)-O(14) bond length is 1.52 Å. The P(2)-O(3) bond length is 1.60 Å. The P(2)-O(4) bond length is 1.60 Å. In the third P site, P(3) is bonded to one O(15), one O(16), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Pt(2)O5 square pyramids. The P(3)-O(15) bond length is 1.53 Å. The P(3)-O(16) bond length is 1.51 Å. The P(3)-O(5) bond length is 1.61 Å. The P(3)-O(6) bond length is 1.61 Å. In the fourth P site, P(4) is bonded to one O(17), one O(18), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Pt(2)O5 square pyramids. The P(4)-O(17) bond length is 1.50 Å. The P(4)-O(18) bond length is 1.53 Å. The P(4)-O(7) bond length is 1.60 Å. The P(4)-O(8) bond length is 1.61 Å. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Pt(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Pt(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Pt(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Na(2), one Pt(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Pt(2) and one P(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(2), one Pt(2), and one P(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Pt(2) and one P(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Pt(2) and one P(4) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one Pt(1) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one Pt(2) atom. In the eleventh O site, O(11) is bonded in a distorted bent 150 degrees geometry to one Na(1) and one P(1) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Na(2) and one P(1) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Na(2) and one P(2) atom. In the fourteenth O site, O(14) is bonded in a single-bond geometry to one P(2) atom. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one Na(2) and one P(3) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one Na(1) and one P(3) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one P(4) atom. In the eighteenth O site, O(18) is bonded in a 1-coordinate geometry to one Na(2) and one P(4) atom.