Materials Data on KHgAs by Materials Project
KHgAs crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. K1+ is bonded to six equivalent As3- atoms to form a mixture of distorted edge, face, and corner-sharing KAs6 octahedra. The corner-sharing octahedral tilt angles are 42°. All K–As bond lengths are 3.70 Å. Hg2+ is bonded in a trigonal planar geometry to three equivalent As3- atoms. All Hg–As bond lengths are 2.67 Å. As3- is bonded in a 3-coordinate geometry to six equivalent K1+ and three equivalent Hg2+ atoms.
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