Materials Data on EuAu5 by Materials Project
EuAu5 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Eu3+ is bonded in a distorted hexagonal planar geometry to eighteen Au+0.60- atoms. There are six shorter (3.29 Å) and twelve longer (3.70 Å) Eu–Au bond lengths. There are two inequivalent Au+0.60- sites. In the first Au+0.60- site, Au+0.60- is bonded to four equivalent Eu3+ and eight Au+0.60- atoms to form a mixture of edge, corner, and face-sharing AuEu4Au8 cuboctahedra. There are four shorter (2.85 Å) and four longer (2.88 Å) Au–Au bond lengths. In the second Au+0.60- site, Au+0.60- is bonded in a 3-coordinate geometry to three equivalent Eu3+ and six equivalent Au+0.60- atoms.
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