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All sourcesNASA NTRSDOE OSTI
DOE OSTI2019

Materials Data on UCuSi by Materials Project

UCuSi crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. U3+ is bonded in a 8-coordinate geometry to two equivalent U3+ and six equivalent Si4- atoms. Both U–U bond lengths are 2.78 Å. All U–Si bond lengths are 2.94 Å. Cu1+ is bonded in a trigonal planar geometry to three equivalent Si4- atoms. All Cu–Si bond lengths are 2.59 Å. Si4- is bonded in a 11-coordinate geometry to six equivalent U3+, three equivalent Cu1+, and two equivalent Si4- atoms. Both Si–Si bond lengths are 2.78 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on UCuSi by Materials Project

UCuSi crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. U3+ is bonded to six equivalent Si4- atoms to form a mixture of edge, corner, and face-sharing USi6 octahedra. The corner-sharing octahedral tilt angles are 46°. All U–Si bond lengths are 3.10 Å. Cu1+ is bonded in a trigonal planar geometry to three equivalent Si4- atoms. All Cu–Si bond lengths are 2.44 Å. Si4- is bonded in a 9-coordinate geometry to six equivalent U3+ and three equivalent Cu1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on UCuSi by Materials Project

UCuSi crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. U3+ is bonded to six equivalent Si4- atoms to form a mixture of distorted face, edge, and corner-sharing USi6 pentagonal pyramids. All U–Si bond lengths are 3.04 Å. Cu1+ is bonded in a trigonal planar geometry to three equivalent Si4- atoms. All Cu–Si bond lengths are 2.33 Å. Si4- is bonded in a 9-coordinate geometry to six equivalent U3+ and three equivalent Cu1+ atoms.

36 MATERIALS SCIENCE↗