Materials Data on NaIO4 by Materials Project
NaIO4 crystallizes in the monoclinic C2 space group. The structure is two-dimensional and consists of one NaIO4 sheet oriented in the (0, 0, 1) direction. Na is bonded to seven O atoms to form distorted edge-sharing NaO7 pentagonal bipyramids. There are a spread of Na–O bond distances ranging from 2.31–2.76 Å. There are four inequivalent O sites. In the first O site, O is bonded to three equivalent Na and one I atom to form a mixture of distorted edge and corner-sharing ONa3I trigonal pyramids. The O–I bond length is 1.83 Å. In the second O site, O is bonded in a 3-coordinate geometry to two equivalent Na and one I atom. The O–I bond length is 1.83 Å. In the third O site, O is bonded in a single-bond geometry to one I atom. The O–I bond length is 1.86 Å. In the fourth O site, O is bonded in an L-shaped geometry to two equivalent Na atoms. I is bonded in a distorted trigonal non-coplanar geometry to three O atoms.