Materials Data on KAg2AsO4 by Materials Project

Abstract

KAg2AsO4 crystallizes in the tetragonal I-42m space group. The structure is three-dimensional. K1+ is bonded in a 8-coordinate geometry to eight equivalent O2- atoms. There are four shorter (2.98 Å) and four longer (2.99 Å) K–O bond lengths. Ag1+ is bonded to four equivalent O2- atoms to form distorted AgO4 trigonal pyramids that share corners with four equivalent AsO4 tetrahedra and corners with four equivalent AgO4 trigonal pyramids. All Ag–O bond lengths are 2.38 Å. As5+ is bonded to four equivalent O2- atoms to form AsO4 tetrahedra that share corners with eight equivalent AgO4 trigonal pyramids. All As–O bond lengths are 1.74 Å. O2- is bonded in a 1-coordinate geometry to two equivalent K1+, two equivalent Ag1+, and one As5+ atom.