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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on TaCo3 by Materials Project

Co3Ta is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Ta is bonded to twelve equivalent Co atoms to form TaCo12 cuboctahedra that share corners with twelve equivalent TaCo12 cuboctahedra, edges with twenty-four equivalent CoTa4Co8 cuboctahedra, faces with six equivalent TaCo12 cuboctahedra, and faces with twelve equivalent CoTa4Co8 cuboctahedra. All Ta–Co bond lengths are 2.57 Å. Co is bonded to four equivalent Ta and eight equivalent Co atoms to form CoTa4Co8 cuboctahedra that share corners with twelve equivalent CoTa4Co8 cuboctahedra, edges with eight equivalent TaCo12 cuboctahedra, edges with sixteen equivalent CoTa4Co8 cuboctahedra, faces with four equivalent TaCo12 cuboctahedra, and faces with fourteen equivalent CoTa4Co8 cuboctahedra. All Co–Co bond lengths are 2.57 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TaCo2 by Materials Project

Co2Ta is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Ta is bonded in a 12-coordinate geometry to four equivalent Ta and twelve equivalent Co atoms. All Ta–Ta bond lengths are 2.91 Å. All Ta–Co bond lengths are 2.79 Å. Co is bonded to six equivalent Ta and six equivalent Co atoms to form a mixture of edge, face, and corner-sharing CoTa6Co6 cuboctahedra. All Co–Co bond lengths are 2.38 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TaCo2 by Materials Project

Co2Ta is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ta is bonded in a 12-coordinate geometry to four equivalent Ta and twelve Co atoms. There are one shorter (2.87 Å) and three longer (2.93 Å) Ta–Ta bond lengths. There are a spread of Ta–Co bond distances ranging from 2.78–2.80 Å. There are two inequivalent Co sites. In the first Co site, Co is bonded to six equivalent Ta and six equivalent Co atoms to form a mixture of corner, edge, and face-sharing CoTa6Co6 cuboctahedra. All Co–Co bond lengths are 2.38 Å. In the second Co site, Co is bonded to six equivalent Ta and six Co atoms to form a mixture of corner, edge, and face-sharing CoTa6Co6 cuboctahedra. There are two shorter (2.36 Å) and two longer (2.41 Å) Co–Co bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TaCo2 by Materials Project

Co2Ta is Hexagonal Laves-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are four inequivalent Ta sites. In the first Ta site, Ta is bonded in a 12-coordinate geometry to four Ta and twelve Co atoms. All Ta–Ta bond lengths are 2.91 Å. There are a spread of Ta–Co bond distances ranging from 2.77–2.79 Å. In the second Ta site, Ta is bonded in a 12-coordinate geometry to four Ta and twelve Co atoms. There are one shorter (2.86 Å) and three longer (2.91 Å) Ta–Ta bond lengths. There are six shorter (2.77 Å) and six longer (2.79 Å) Ta–Co bond lengths. In the third Ta site, Ta is bonded in a 12-coordinate geometry to four Ta and twelve Co atoms. The Ta–Ta bond length is 2.91 Å. There are a spread of Ta–Co bond distances ranging from 2.77–2.79 Å. In the fourth Ta site, Ta is bonded in a 12-coordinate geometry to four Ta and twelve Co atoms. There are six shorter (2.77 Å) and six longer (2.79 Å) Ta–Co bond lengths. There are three inequivalent Co sites. In the first Co site, Co is bonded to six Ta and six Co atoms to form a mixture of edge, corner, and face-sharing CoTa6Co6 cuboctahedra. All Co–Co bond lengths are 2.38 Å. In the second Co site, Co is bonded to six Ta and six Co atoms to form a mixture of edge, corner, and face-sharing CoTa6Co6 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.35–2.40 Å. In the third Co site, Co is bonded to six Ta and six Co atoms to form a mixture of edge, corner, and face-sharing CoTa6Co6 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ta2Co by Materials Project

Ta2Co is Khatyrkite structured and crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. Ta is bonded in a 4-coordinate geometry to four equivalent Co atoms. All Ta–Co bond lengths are 2.62 Å. Co is bonded in a 10-coordinate geometry to eight equivalent Ta and two equivalent Co atoms. Both Co–Co bond lengths are 2.49 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TaCo3 by Materials Project

Co3Ta is beta Cu3Ti-like structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are two inequivalent Ta sites. In the first Ta site, Ta is bonded to twelve Co atoms to form TaCo12 cuboctahedra that share corners with six equivalent TaCo12 cuboctahedra, corners with twelve CoTa4Co8 cuboctahedra, edges with eighteen CoTa4Co8 cuboctahedra, faces with eight equivalent TaCo12 cuboctahedra, and faces with twelve CoTa4Co8 cuboctahedra. There are six shorter (2.58 Å) and six longer (2.60 Å) Ta–Co bond lengths. In the second Ta site, Ta is bonded to twelve Co atoms to form TaCo12 cuboctahedra that share corners with six CoTa4Co8 cuboctahedra, corners with nine equivalent TaCo12 cuboctahedra, edges with twenty-one CoTa4Co8 cuboctahedra, faces with seven TaCo12 cuboctahedra, and faces with twelve CoTa4Co8 cuboctahedra. There are a spread of Ta–Co bond distances ranging from 2.57–2.62 Å. There are nine inequivalent Co sites. In the first Co site, Co is bonded to four Ta and eight Co atoms to form CoTa4Co8 cuboctahedra that share corners with four equivalent TaCo12 cuboctahedra, corners with fourteen CoTa4Co8 cuboctahedra, edges with six TaCo12 cuboctahedra, edges with twelve CoTa4Co8 cuboctahedra, faces with four TaCo12 cuboctahedra, and faces with sixteen CoTa4Co8 cuboctahedra. There are four shorter (2.52 Å) and four longer (2.58 Å) Co–Co bond lengths. In the second Co site, Co is bonded to four Ta and eight Co atoms to form CoTa4Co8 cuboctahedra that share corners with four equivalent TaCo12 cuboctahedra, corners with fourteen CoTa4Co8 cuboctahedra, edges with six TaCo12 cuboctahedra, edges with twelve CoTa4Co8 cuboctahedra, faces with four TaCo12 cuboctahedra, and faces with sixteen CoTa4Co8 cuboctahedra. There are two shorter (2.58 Å) and two longer (2.62 Å) Co–Ta bond lengths. There are four shorter (2.52 Å) and two longer (2.58 Å) Co–Co bond lengths. In the third Co site, Co is bonded to four Ta and eight Co atoms to form distorted CoTa4Co8 cuboctahedra that share corners with two equivalent TaCo12 cuboctahedra, corners with thirteen CoTa4Co8 cuboctahedra, edges with seven TaCo12 cuboctahedra, edges with fourteen CoTa4Co8 cuboctahedra, faces with four TaCo12 cuboctahedra, and faces with fifteen CoTa4Co8 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.44–2.73 Å. In the fourth Co site, Co is bonded to four Ta and eight Co atoms to form distorted CoTa4Co8 cuboctahedra that share corners with two equivalent TaCo12 cuboctahedra, corners with thirteen CoTa4Co8 cuboctahedra, edges with seven TaCo12 cuboctahedra, edges with fourteen CoTa4Co8 cuboctahedra, faces with four TaCo12 cuboctahedra, and faces with fifteen CoTa4Co8 cuboctahedra. There are two shorter (2.52 Å) and one longer (2.55 Å) Co–Co bond lengths. In the fifth Co site, Co is bonded to four Ta and eight Co atoms to form distorted CoTa4Co8 cuboctahedra that share corners with two equivalent TaCo12 cuboctahedra, corners with thirteen CoTa4Co8 cuboctahedra, edges with seven TaCo12 cuboctahedra, edges with fourteen CoTa4Co8 cuboctahedra, faces with four TaCo12 cuboctahedra, and faces with fifteen CoTa4Co8 cuboctahedra. The Co–Ta bond length is 2.60 Å. There are a spread of Co–Co bond distances ranging from 2.44–2.73 Å. In the sixth Co site, Co is bonded to four Ta and eight Co atoms to form distorted CoTa4Co8 cuboctahedra that share corners with two equivalent TaCo12 cuboctahedra, corners with thirteen CoTa4Co8 cuboctahedra, edges with seven TaCo12 cuboctahedra, edges with fourteen CoTa4Co8 cuboctahedra, faces with four TaCo12 cuboctahedra, and faces with fifteen CoTa4Co8 cuboctahedra. In the seventh Co site, Co is bonded to four Ta and eight Co atoms to form CoTa4Co8 cuboctahedra that share corners with four equivalent TaCo12 cuboctahedra, corners with fourteen CoTa4Co8 cuboctahedra, edges with six TaCo12 cuboctahedra, edges with twelve CoTa4Co8 cuboctahedra, faces with four TaCo12 cuboctahedra, and faces with sixteen CoTa4Co8 cuboctahedra. There are two shorter (2.52 Å) and four longer (2.58 Å) Co–Co bond lengths. In the eighth Co site, Co is bonded to four Ta and eight Co atoms to form distorted CoTa4Co8 cuboctahedra that share corners with two equivalent TaCo12 cuboctahedra, corners with thirteen CoTa4Co8 cuboctahedra, edges with seven TaCo12 cuboctahedra, edges with fourteen CoTa4Co8 cuboctahedra, faces with four TaCo12 cuboctahedra, and faces with fifteen CoTa4Co8 cuboctahedra. There are one shorter (2.57 Å) and two longer (2.58 Å) Co–Ta bond lengths. There are a spread of Co–Co bond distances ranging from 2.44–2.73 Å. In the ninth Co site, Co is bonded to four Ta and eight Co atoms to form CoTa4Co8 cuboctahedra that share corners with four equivalent TaCo12 cuboctahedra, corners with fourteen CoTa4Co8 cuboctahedra, edges with six TaCo12 cuboctahedra, edges with twelve CoTa4Co8 cuboctahedra, faces with four TaCo12 cuboctahedra, and faces with sixteen CoTa4Co8 cuboctahedra. There are two shorter (2.58 Å) and two longer (2.62 Å) Co–Ta bond lengths. There are one shorter (2.52 Å) and four longer (2.58 Å) Co–Co bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TaCo by Materials Project

CoTa is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Ta is bonded in a body-centered cubic geometry to eight equivalent Co atoms. All Ta–Co bond lengths are 2.66 Å. Co is bonded in a body-centered cubic geometry to eight equivalent Ta atoms.

36 MATERIALS SCIENCE↗