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DOE OSTI2020

Materials Data on Ac3Eu by Materials Project

Ac3Eu is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ac is bonded to eight equivalent Ac and four equivalent Eu atoms to form AcAc8Eu4 cuboctahedra that share corners with four equivalent EuAc12 cuboctahedra, corners with fourteen equivalent AcAc8Eu4 cuboctahedra, edges with six equivalent EuAc12 cuboctahedra, edges with twelve equivalent AcAc8Eu4 cuboctahedra, faces with four equivalent EuAc12 cuboctahedra, and faces with sixteen equivalent AcAc8Eu4 cuboctahedra. There are a spread of Ac–Ac bond distances ranging from 4.03–4.09 Å. There are two shorter (4.04 Å) and two longer (4.08 Å) Ac–Eu bond lengths. Eu is bonded to twelve equivalent Ac atoms to form EuAc12 cuboctahedra that share corners with six equivalent EuAc12 cuboctahedra, corners with twelve equivalent AcAc8Eu4 cuboctahedra, edges with eighteen equivalent AcAc8Eu4 cuboctahedra, faces with eight equivalent EuAc12 cuboctahedra, and faces with twelve equivalent AcAc8Eu4 cuboctahedra.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on AcEu3 by Materials Project

AcEu3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ac is bonded to twelve equivalent Eu atoms to form AcEu12 cuboctahedra that share corners with six equivalent AcEu12 cuboctahedra, corners with twelve equivalent EuAc4Eu8 cuboctahedra, edges with eighteen equivalent EuAc4Eu8 cuboctahedra, faces with eight equivalent AcEu12 cuboctahedra, and faces with twelve equivalent EuAc4Eu8 cuboctahedra. There are six shorter (3.96 Å) and six longer (4.00 Å) Ac–Eu bond lengths. Eu is bonded to four equivalent Ac and eight equivalent Eu atoms to form EuAc4Eu8 cuboctahedra that share corners with four equivalent AcEu12 cuboctahedra, corners with fourteen equivalent EuAc4Eu8 cuboctahedra, edges with six equivalent AcEu12 cuboctahedra, edges with twelve equivalent EuAc4Eu8 cuboctahedra, faces with four equivalent AcEu12 cuboctahedra, and faces with sixteen equivalent EuAc4Eu8 cuboctahedra. There are a spread of Eu–Eu bond distances ranging from 3.97–4.02 Å.

36 MATERIALS SCIENCE↗