Materials Data on YbEu(SiAu)4 by Materials Project
YbEu(AuSi)4 crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Yb2+ is bonded to eight equivalent Au1- atoms to form distorted edge-sharing YbAu8 hexagonal bipyramids. All Yb–Au bond lengths are 3.33 Å. Eu2+ is bonded in a 8-coordinate geometry to eight equivalent Au1- atoms. All Eu–Au bond lengths are 3.37 Å. Au1- is bonded in a 4-coordinate geometry to two equivalent Yb2+, two equivalent Eu2+, and four Si atoms. There are two shorter (2.58 Å) and two longer (2.60 Å) Au–Si bond lengths. There are two inequivalent Si sites. In the first Si site, Si is bonded in a 5-coordinate geometry to four equivalent Au1- and one Si atom. The Si–Si bond length is 2.33 Å. In the second Si site, Si is bonded in a 5-coordinate geometry to four equivalent Au1- and one Si atom. The Si–Si bond length is 2.32 Å.