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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on BaCe by Materials Project

BaCe1 crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Ba is bonded to six equivalent Ba and six equivalent Ce atoms to form BaBa6Ce6 cuboctahedra that share corners with eighteen equivalent BaBa6Ce6 cuboctahedra, edges with six equivalent BaBa6Ce6 cuboctahedra, edges with twelve equivalent CeBa6Ce6 cuboctahedra, faces with eight equivalent BaBa6Ce6 cuboctahedra, and faces with twelve equivalent CeBa6Ce6 cuboctahedra. There are two shorter (3.91 Å) and four longer (3.93 Å) Ba–Ba bond lengths. All Ba–Ce bond lengths are 4.01 Å. Ce is bonded to six equivalent Ba and six equivalent Ce atoms to form CeBa6Ce6 cuboctahedra that share corners with eighteen equivalent CeBa6Ce6 cuboctahedra, edges with six equivalent CeBa6Ce6 cuboctahedra, edges with twelve equivalent BaBa6Ce6 cuboctahedra, faces with eight equivalent CeBa6Ce6 cuboctahedra, and faces with twelve equivalent BaBa6Ce6 cuboctahedra. There are two shorter (3.91 Å) and four longer (3.93 Å) Ce–Ce bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba3Ce by Materials Project

Ba3Ce is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ba is bonded to eight equivalent Ba and four equivalent Ce atoms to form distorted BaBa8Ce4 cuboctahedra that share corners with four equivalent CeBa12 cuboctahedra, corners with fourteen equivalent BaBa8Ce4 cuboctahedra, edges with six equivalent CeBa12 cuboctahedra, edges with twelve equivalent BaBa8Ce4 cuboctahedra, faces with four equivalent CeBa12 cuboctahedra, and faces with sixteen equivalent BaBa8Ce4 cuboctahedra. There are a spread of Ba–Ba bond distances ranging from 4.22–4.47 Å. There are two shorter (4.24 Å) and two longer (4.34 Å) Ba–Ce bond lengths. Ce is bonded to twelve equivalent Ba atoms to form CeBa12 cuboctahedra that share corners with six equivalent CeBa12 cuboctahedra, corners with twelve equivalent BaBa8Ce4 cuboctahedra, edges with eighteen equivalent BaBa8Ce4 cuboctahedra, faces with eight equivalent CeBa12 cuboctahedra, and faces with twelve equivalent BaBa8Ce4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba3Ce by Materials Project

Ba3Ce is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ba sites. In the first Ba site, Ba is bonded to eight Ba and four equivalent Ce atoms to form BaBa8Ce4 cuboctahedra that share corners with twelve equivalent BaBa8Ce4 cuboctahedra, edges with eight equivalent CeBa12 cuboctahedra, edges with sixteen BaBa8Ce4 cuboctahedra, faces with four equivalent CeBa12 cuboctahedra, and faces with fourteen BaBa8Ce4 cuboctahedra. There are four shorter (4.18 Å) and four longer (4.24 Å) Ba–Ba bond lengths. All Ba–Ce bond lengths are 4.24 Å. In the second Ba site, Ba is bonded to eight equivalent Ba and four equivalent Ce atoms to form BaBa8Ce4 cuboctahedra that share corners with four equivalent BaBa8Ce4 cuboctahedra, corners with eight equivalent CeBa12 cuboctahedra, edges with twenty-four BaBa8Ce4 cuboctahedra, faces with six equivalent CeBa12 cuboctahedra, and faces with twelve BaBa8Ce4 cuboctahedra. All Ba–Ce bond lengths are 4.18 Å. Ce is bonded to twelve Ba atoms to form CeBa12 cuboctahedra that share corners with four equivalent CeBa12 cuboctahedra, corners with eight equivalent BaBa8Ce4 cuboctahedra, edges with eight equivalent CeBa12 cuboctahedra, edges with sixteen equivalent BaBa8Ce4 cuboctahedra, faces with four equivalent CeBa12 cuboctahedra, and faces with fourteen BaBa8Ce4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BaCe3 by Materials Project

BaCe3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ba is bonded to twelve equivalent Ce atoms to form a mixture of distorted corner and face-sharing BaCe12 cuboctahedra. There are six shorter (3.63 Å) and six longer (3.88 Å) Ba–Ce bond lengths. Ce is bonded in a 12-coordinate geometry to four equivalent Ba and six equivalent Ce atoms. There are two shorter (2.89 Å) and four longer (3.40 Å) Ce–Ce bond lengths.

36 MATERIALS SCIENCE↗