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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Cs4Sn2Au7 by Materials Project

Cs4Au7Sn2 crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of three Cs4Au7Sn2 sheets oriented in the (0, 0, 1) direction. there are two inequivalent Cs sites. In the first Cs site, Cs is bonded in a 12-coordinate geometry to three equivalent Au atoms. All Cs–Au bond lengths are 3.72 Å. In the second Cs site, Cs is bonded in a 9-coordinate geometry to twelve Au atoms. There are a spread of Cs–Au bond distances ranging from 3.75–4.09 Å. There are two inequivalent Au sites. In the first Au site, Au is bonded in a 1-coordinate geometry to four Cs, one Au, and one Sn atom. The Au–Au bond length is 2.85 Å. The Au–Sn bond length is 2.69 Å. In the second Au site, Au is bonded to six equivalent Cs and six equivalent Au atoms to form edge-sharing AuCs6Au6 cuboctahedra. Sn is bonded in a 3-coordinate geometry to three equivalent Au atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs3Sn4Au by Materials Project

Cs3AuSn4 crystallizes in the orthorhombic Pmmn space group. The structure is three-dimensional. there are two inequivalent Cs sites. In the first Cs site, Cs is bonded in a 6-coordinate geometry to three Sn atoms. There are one shorter (3.76 Å) and two longer (3.88 Å) Cs–Sn bond lengths. In the second Cs site, Cs is bonded in a 12-coordinate geometry to two equivalent Au and four equivalent Sn atoms. Both Cs–Au bond lengths are 4.01 Å. There are two shorter (3.77 Å) and two longer (4.34 Å) Cs–Sn bond lengths. Au is bonded in a 6-coordinate geometry to two equivalent Cs and four Sn atoms. There are two shorter (2.81 Å) and two longer (2.82 Å) Au–Sn bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a 1-coordinate geometry to four Cs, one Au, and three Sn atoms. There are two shorter (3.00 Å) and one longer (3.07 Å) Sn–Sn bond lengths. In the second Sn site, Sn is bonded in a 2-coordinate geometry to one Cs, one Au, and two equivalent Sn atoms.

36 MATERIALS SCIENCE↗