KPtS2O9 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 9-coordinate geometry to one O(2), one O(5), one O(7), two equivalent O(3), two equivalent O(4), and two equivalent O(8) atoms. Pt(1) is bonded to one O(1), one O(2), one O(5), one O(6), and one O(9) atom to form PtO5 square pyramids that share corners with two equivalent S(1)O4 tetrahedra and corners with two equivalent S(2)O4 tetrahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with two equivalent Pt(1)O5 square pyramids. In the second S site, S(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SO4 tetrahedra that share corners with two equivalent Pt(1)O5 square pyramids. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Pt(1) and one S(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1), one Pt(1), and one S(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent K(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(1) and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one K(1), one Pt(1), and one S(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Pt(1) and one S(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one K(1) and one S(2) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to two equivalent K(1) and one S(2) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one Pt(1) atom.
KPtS2O9 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 9-coordinate geometry to one O(2), one O(5), one O(7), two equivalent O(3), two equivalent O(4), and two equivalent O(8) atoms. The K(1)-O(2) bond length is 2.99 Å. The K(1)-O(5) bond length is 3.19 Å. The K(1)-O(7) bond length is 2.90 Å. There is one shorter (2.83 Å) and one longer (3.11 Å) K(1)-O(3) bond length. There is one shorter (2.93 Å) and one longer (3.02 Å) K(1)-O(4) bond length. There is one shorter (3.01 Å) and one longer (3.08 Å) K(1)-O(8) bond length. Pt(1) is bonded to one O(1), one O(2), one O(5), one O(6), and one O(9) atom to form PtO5 square pyramids that share corners with two equivalent S(1)O4 tetrahedra and corners with two equivalent S(2)O4 tetrahedra. The Pt(1)-O(1) bond length is 2.04 Å. The Pt(1)-O(2) bond length is 2.04 Å. The Pt(1)-O(5) bond length is 2.04 Å. The Pt(1)-O(6) bond length is 2.03 Å. The Pt(1)-O(9) bond length is 1.96 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with two equivalent Pt(1)O5 square pyramids. The S(1)-O(1) bond length is 1.56 Å. The S(1)-O(2) bond length is 1.57 Å. The S(1)-O(3) bond length is 1.45 Å. The S(1)-O(4) bond length is 1.44 Å. In the second S site, S(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SO4 tetrahedra that share corners with two equivalent Pt(1)O5 square pyramids. The S(2)-O(5) bond length is 1.57 Å. The S(2)-O(6) bond length is 1.56 Å. The S(2)-O(7) bond length is 1.45 Å. The S(2)-O(8) bond length is 1.45 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Pt(1) and one S(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1), one Pt(1), and one S(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent K(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(1) and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one K(1), one Pt(1), and one S(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Pt(1) and one S(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one K(1) and one S(2) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to two equivalent K(1) and one S(2) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one Pt(1) atom.