Materials Data on RbAu5 by Materials Project
RbAu5 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Rb1+ is bonded in a 6-coordinate geometry to eighteen Au+0.20- atoms. There are six shorter (3.40 Å) and twelve longer (3.73 Å) Rb–Au bond lengths. There are two inequivalent Au+0.20- sites. In the first Au+0.20- site, Au+0.20- is bonded in a 3-coordinate geometry to three equivalent Rb1+ and six equivalent Au+0.20- atoms. All Au–Au bond lengths are 2.84 Å. In the second Au+0.20- site, Au+0.20- is bonded to four equivalent Rb1+ and eight Au+0.20- atoms to form a mixture of edge, corner, and face-sharing AuRb4Au8 cuboctahedra. All Au–Au bond lengths are 2.95 Å.
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