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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on KAu5 by Materials Project

KAu5 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. K1+ is bonded in a 6-coordinate geometry to eighteen Au+0.20- atoms. There are six shorter (3.35 Å) and twelve longer (3.70 Å) K–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 K1+ 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 K1+ and eight Au+0.20- atoms to form a mixture of face, edge, and corner-sharing AuK4Au8 cuboctahedra. All Au–Au bond lengths are 2.90 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KAu2 by Materials Project

KAu2 is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. K is bonded in a 12-coordinate geometry to twelve Au atoms. There are a spread of K–Au bond distances ranging from 3.38–3.52 Å. There are two inequivalent Au sites. In the first Au site, Au is bonded to six equivalent K and six equivalent Au atoms to form a mixture of distorted corner, edge, and face-sharing AuK6Au6 cuboctahedra. All Au–Au bond lengths are 3.00 Å. In the second Au site, Au is bonded to six equivalent K and six Au atoms to form a mixture of corner, edge, and face-sharing AuK6Au6 cuboctahedra. There are two shorter (2.88 Å) and two longer (2.89 Å) Au–Au bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Au3 by Materials Project

K2Au3 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. K is bonded in a 8-coordinate geometry to ten Au atoms. There are a spread of K–Au bond distances ranging from 3.43–3.99 Å. There are two inequivalent Au sites. In the first Au site, Au is bonded to eight equivalent K and four equivalent Au atoms to form a mixture of distorted face and edge-sharing AuK8Au4 cuboctahedra. All Au–Au bond lengths are 2.86 Å. In the second Au site, Au is bonded in a 10-coordinate geometry to six equivalent K and four Au atoms. There are one shorter (2.75 Å) and one longer (2.85 Å) Au–Au bond lengths.

36 MATERIALS SCIENCE↗