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K2PtO6 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. K is bonded in a 9-coordinate geometry to nine equivalent O atoms. There are a spread of K–O bond distances ranging from 2.90–2.95 Å. Pt is bonded in an octahedral geometry to six equivalent O atoms. All Pt–O bond lengths are 1.90 Å. O is bonded in a 1-coordinate geometry to three equivalent K and one Pt atom.
K2PtO6 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. K is bonded in a 4-coordinate geometry to seven O atoms. There are a spread of K–O bond distances ranging from 2.73–3.13 Å. Pt is bonded in a linear geometry to two equivalent O atoms. Both Pt–O bond lengths are 1.88 Å. There are three inequivalent O sites. In the first O site, O is bonded to four equivalent K and one O atom to form a mixture of edge and corner-sharing OK4O trigonal bipyramids. The O–O bond length is 1.40 Å. In the second O site, O is bonded in a 1-coordinate geometry to two equivalent K, one Pt, and one O atom. In the third O site, O is bonded in a distorted bent 150 degrees geometry to one K and one O atom. The O–O bond length is 1.28 Å.
K2PtO6 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. K is bonded in a 9-coordinate geometry to nine equivalent O atoms. There are a spread of K–O bond distances ranging from 2.65–2.94 Å. Pt is bonded in an octahedral geometry to six equivalent O atoms. All Pt–O bond lengths are 2.08 Å. O is bonded in a 1-coordinate geometry to three equivalent K, one Pt, and one O atom. The O–O bond length is 1.49 Å.