Materials Data on Eu(Ag2Sb)2 by Materials Project
EuAg4Sb2 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Eu2+ is bonded to six equivalent Sb3- atoms to form edge-sharing EuSb6 octahedra. All Eu–Sb bond lengths are 3.31 Å. There are two inequivalent Ag1+ sites. In the first Ag1+ site, Ag1+ is bonded in a 1-coordinate geometry to six Ag1+ and four equivalent Sb3- atoms. There are three shorter (2.95 Å) and three longer (3.02 Å) Ag–Ag bond lengths. There are one shorter (2.88 Å) and three longer (3.23 Å) Ag–Sb bond lengths. In the second Ag1+ site, Ag1+ is bonded in a 3-coordinate geometry to three equivalent Ag1+ and three equivalent Sb3- atoms. All Ag–Sb bond lengths are 2.84 Å. Sb3- is bonded in a 10-coordinate geometry to three equivalent Eu2+ and seven Ag1+ atoms.