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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on K3Eu by Materials Project

K3Eu is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. K is bonded to eight equivalent K and four equivalent Eu atoms to form distorted KK8Eu4 cuboctahedra that share corners with four equivalent EuK12 cuboctahedra, corners with fourteen equivalent KK8Eu4 cuboctahedra, edges with six equivalent EuK12 cuboctahedra, edges with twelve equivalent KK8Eu4 cuboctahedra, faces with four equivalent EuK12 cuboctahedra, and faces with sixteen equivalent KK8Eu4 cuboctahedra. There are a spread of K–K bond distances ranging from 4.54–4.63 Å. There are two shorter (4.55 Å) and two longer (4.58 Å) K–Eu bond lengths. Eu is bonded to twelve equivalent K atoms to form EuK12 cuboctahedra that share corners with six equivalent EuK12 cuboctahedra, corners with twelve equivalent KK8Eu4 cuboctahedra, edges with eighteen equivalent KK8Eu4 cuboctahedra, faces with eight equivalent EuK12 cuboctahedra, and faces with twelve equivalent KK8Eu4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3Eu by Materials Project

K3Eu is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded in a body-centered cubic geometry to four equivalent K and four equivalent Eu atoms. All K–K bond lengths are 4.41 Å. All K–Eu bond lengths are 4.41 Å. In the second K site, K is bonded in a body-centered cubic geometry to eight equivalent K atoms. Eu is bonded in a body-centered cubic geometry to eight equivalent K atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KEu3 by Materials Project

KEu3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. K is bonded in a body-centered cubic geometry to fourteen Eu atoms. There are eight shorter (4.04 Å) and six longer (4.67 Å) K–Eu bond lengths. There are two inequivalent Eu sites. In the first Eu site, Eu is bonded in a distorted body-centered cubic geometry to four equivalent K and four equivalent Eu atoms. All Eu–Eu bond lengths are 4.04 Å. In the second Eu site, Eu is bonded in a 8-coordinate geometry to six equivalent K and eight equivalent Eu atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KEu3 by Materials Project

KEu3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. K is bonded to twelve equivalent Eu atoms to form KEu12 cuboctahedra that share corners with twelve equivalent KEu12 cuboctahedra, edges with twenty-four equivalent EuK4Eu8 cuboctahedra, faces with six equivalent KEu12 cuboctahedra, and faces with twelve equivalent EuK4Eu8 cuboctahedra. All K–Eu bond lengths are 4.16 Å. Eu is bonded to four equivalent K and eight equivalent Eu atoms to form EuK4Eu8 cuboctahedra that share corners with twelve equivalent EuK4Eu8 cuboctahedra, edges with eight equivalent KEu12 cuboctahedra, edges with sixteen equivalent EuK4Eu8 cuboctahedra, faces with four equivalent KEu12 cuboctahedra, and faces with fourteen equivalent EuK4Eu8 cuboctahedra. All Eu–Eu bond lengths are 4.16 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KEu3 by Materials Project

KEu3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. K is bonded to twelve Eu atoms to form KEu12 cuboctahedra that share corners with four equivalent KEu12 cuboctahedra, corners with eight equivalent EuK4Eu8 cuboctahedra, edges with eight equivalent KEu12 cuboctahedra, edges with sixteen equivalent EuK4Eu8 cuboctahedra, faces with four equivalent KEu12 cuboctahedra, and faces with fourteen EuK4Eu8 cuboctahedra. There are four shorter (4.13 Å) and eight longer (4.20 Å) K–Eu bond lengths. There are two inequivalent Eu sites. In the first Eu site, Eu is bonded to four equivalent K and eight Eu atoms to form EuK4Eu8 cuboctahedra that share corners with twelve equivalent EuK4Eu8 cuboctahedra, edges with eight equivalent KEu12 cuboctahedra, edges with sixteen EuK4Eu8 cuboctahedra, faces with four equivalent KEu12 cuboctahedra, and faces with fourteen EuK4Eu8 cuboctahedra. There are four shorter (4.13 Å) and four longer (4.20 Å) Eu–Eu bond lengths. In the second Eu site, Eu is bonded to four equivalent K and eight equivalent Eu atoms to form distorted EuK4Eu8 cuboctahedra that share corners with four equivalent EuK4Eu8 cuboctahedra, corners with eight equivalent KEu12 cuboctahedra, edges with twenty-four EuK4Eu8 cuboctahedra, faces with six equivalent KEu12 cuboctahedra, and faces with twelve EuK4Eu8 cuboctahedra.

36 MATERIALS SCIENCE↗