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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Eu2Al3Ag by Materials Project

Eu2AgAl3 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Eu is bonded in a 12-coordinate geometry to four equivalent Eu, three equivalent Ag, and nine equivalent Al atoms. There are one shorter (3.42 Å) and three longer (3.52 Å) Eu–Eu bond lengths. All Eu–Ag bond lengths are 3.36 Å. All Eu–Al bond lengths are 3.34 Å. Ag is bonded to six equivalent Eu and six equivalent Al atoms to form AgEu6Al6 cuboctahedra that share corners with six equivalent AgEu6Al6 cuboctahedra, corners with twelve equivalent AlEu6Al4Ag2 cuboctahedra, edges with six equivalent AgEu6Al6 cuboctahedra, and faces with eighteen equivalent AlEu6Al4Ag2 cuboctahedra. All Ag–Al bond lengths are 2.84 Å. Al is bonded to six equivalent Eu, two equivalent Ag, and four equivalent Al atoms to form AlEu6Al4Ag2 cuboctahedra that share corners with four equivalent AgEu6Al6 cuboctahedra, corners with fourteen equivalent AlEu6Al4Ag2 cuboctahedra, edges with six equivalent AlEu6Al4Ag2 cuboctahedra, faces with six equivalent AgEu6Al6 cuboctahedra, and faces with twelve equivalent AlEu6Al4Ag2 cuboctahedra. All Al–Al bond lengths are 2.87 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuAlAg4 by Materials Project

EuAg4Al crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Eu is bonded in a 6-coordinate geometry to fifteen Ag and three equivalent Al atoms. There are three shorter (3.36 Å) and twelve longer (3.65 Å) Eu–Ag bond lengths. All Eu–Al bond lengths are 3.36 Å. There are two inequivalent Ag sites. In the first Ag site, Ag is bonded to three equivalent Eu and six equivalent Ag atoms to form distorted AgEu3Ag6 cuboctahedra that share corners with eighteen AgEu3Ag6 cuboctahedra, edges with twelve equivalent AgEu4Al2Ag6 cuboctahedra, and faces with eight AgEu3Ag6 cuboctahedra. All Ag–Ag bond lengths are 2.79 Å. In the second Ag site, Ag is bonded to four equivalent Eu, six Ag, and two equivalent Al atoms to form a mixture of distorted edge, face, and corner-sharing AgEu4Al2Ag6 cuboctahedra. There are two shorter (2.85 Å) and two longer (2.97 Å) Ag–Ag bond lengths. Both Ag–Al bond lengths are 2.75 Å. Al is bonded in a 12-coordinate geometry to three equivalent Eu and six equivalent Ag atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuAl3Ag2 by Materials Project

EuAg2Al3 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Eu is bonded in a distorted hexagonal planar geometry to six equivalent Ag and twelve equivalent Al atoms. All Eu–Ag bond lengths are 3.23 Å. All Eu–Al bond lengths are 3.56 Å. Ag is bonded in a 12-coordinate geometry to three equivalent Eu and six equivalent Al atoms. All Ag–Al bond lengths are 2.74 Å. Al is bonded to four equivalent Eu and four equivalent Ag atoms to form a mixture of distorted edge, face, and corner-sharing AlEu4Ag4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu2(AlAg)5 by Materials Project

Eu2(AgAl)5 crystallizes in the orthorhombic Pmmm space group. The structure is three-dimensional. there are two inequivalent Eu sites. In the first Eu site, Eu is bonded in a distorted hexagonal planar geometry to six Ag and twelve Al atoms. There are two shorter (3.20 Å) and four longer (3.22 Å) Eu–Ag bond lengths. There are four shorter (3.57 Å) and eight longer (3.62 Å) Eu–Al bond lengths. In the second Eu site, Eu is bonded in a 6-coordinate geometry to ten Ag and eight equivalent Al atoms. There are a spread of Eu–Ag bond distances ranging from 3.26–3.57 Å. All Eu–Al bond lengths are 3.61 Å. There are three inequivalent Ag sites. In the first Ag site, Ag is bonded in a 12-coordinate geometry to three Eu, two equivalent Ag, and four equivalent Al atoms. Both Ag–Ag bond lengths are 2.84 Å. All Ag–Al bond lengths are 2.75 Å. In the second Ag site, Ag is bonded in a 12-coordinate geometry to three Eu and six Al atoms. There are four shorter (2.78 Å) and two longer (2.79 Å) Ag–Al bond lengths. In the third Ag site, Ag is bonded to four equivalent Eu, four equivalent Ag, and four equivalent Al atoms to form distorted AgEu4Al4Ag4 cuboctahedra that share corners with four equivalent AgEu4Al4Ag4 cuboctahedra, corners with four equivalent AlEu4Al4Ag4 cuboctahedra, edges with two equivalent AgEu4Al4Ag4 cuboctahedra, and faces with two equivalent AgEu4Al4Ag4 cuboctahedra. All Ag–Al bond lengths are 2.81 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded to four equivalent Eu, four equivalent Ag, and four equivalent Al atoms to form distorted AlEu4Al4Ag4 cuboctahedra that share corners with four equivalent AgEu4Al4Ag4 cuboctahedra, corners with four equivalent AlEu4Al4Ag4 cuboctahedra, edges with two equivalent AlEu4Al4Ag4 cuboctahedra, and faces with two equivalent AlEu4Al4Ag4 cuboctahedra. All Al–Al bond lengths are 2.83 Å. In the second Al site, Al is bonded in a 12-coordinate geometry to four Eu, five Ag, and three Al atoms. There are one shorter (2.76 Å) and one longer (2.77 Å) Al–Al bond lengths.

36 MATERIALS SCIENCE↗