Materials Data on KSnAs by Materials Project
KSnAs is trigonal omega-derived structured and crystallizes in the hexagonal P6_3mc space group. The structure is two-dimensional and consists of two KSnAs sheets oriented in the (0, 0, 1) direction. K1+ is bonded in a 3-coordinate geometry to three equivalent As3- atoms. All K–As bond lengths are 3.33 Å. Sn2+ is bonded in a distorted trigonal non-coplanar geometry to three equivalent As3- atoms. All Sn–As bond lengths are 2.76 Å. As3- is bonded to three equivalent K1+ and three equivalent Sn2+ atoms to form edge-sharing AsK3Sn3 octahedra.
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