Materials Data on K4HgP2 by Materials Project
K4HgP2 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to four equivalent P3- atoms to form a mixture of edge and corner-sharing KP4 tetrahedra. There are one shorter (3.25 Å) and three longer (3.45 Å) K–P bond lengths. In the second K1+ site, K1+ is bonded in a trigonal non-coplanar geometry to three equivalent P3- atoms. All K–P bond lengths are 3.40 Å. Hg2+ is bonded in a linear geometry to two equivalent P3- atoms. Both Hg–P bond lengths are 2.42 Å. P3- is bonded in a body-centered cubic geometry to seven K1+ and one Hg2+ atom.
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