Materials Data on K2PtI5 by Materials Project
K2PtI5 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. K is bonded in a 7-coordinate geometry to seven I atoms. There are a spread of K–I bond distances ranging from 3.63–3.82 Å. Pt is bonded to six I atoms to form corner-sharing PtI6 octahedra. The corner-sharing octahedral tilt angles are 12°. There are a spread of Pt–I bond distances ranging from 2.69–2.90 Å. There are three inequivalent I sites. In the first I site, I is bonded in a distorted T-shaped geometry to two equivalent K and one Pt atom. In the second I site, I is bonded to four equivalent K and one Pt atom to form a mixture of distorted edge and corner-sharing IK4Pt trigonal bipyramids. In the third I site, I is bonded in a rectangular see-saw-like geometry to two equivalent K and two equivalent Pt atoms.