Materials Data on KFeAs2 by Materials Project
KFeAs2 crystallizes in the tetragonal I-4m2 space group. The structure is three-dimensional. K1+ is bonded in a body-centered cubic geometry to eight equivalent As2- atoms. All K–As bond lengths are 3.54 Å. Fe3+ is bonded to four equivalent As2- atoms to form distorted corner-sharing FeAs4 tetrahedra. All Fe–As bond lengths are 2.23 Å. As2- is bonded in a distorted bent 120 degrees geometry to four equivalent K1+ and two equivalent Fe3+ atoms.
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