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DOE OSTI2020

Materials Data on Ta2Al by Materials Project

Ta2Al is beta Plutonium-derived structured and crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. there are three inequivalent Ta sites. In the first Ta site, Ta is bonded in a 11-coordinate geometry to nine Ta and five Al atoms. There are a spread of Ta–Ta bond distances ranging from 2.69–3.30 Å. There are a spread of Ta–Al bond distances ranging from 2.97–3.13 Å. In the second Ta site, Ta is bonded in a 12-coordinate geometry to seven Ta and five Al atoms. There are one shorter (2.82 Å) and two longer (3.19 Å) Ta–Ta bond lengths. There are a spread of Ta–Al bond distances ranging from 2.68–2.90 Å. In the third Ta site, Ta is bonded in a 2-coordinate geometry to eleven Ta and four Al atoms. The Ta–Ta bond length is 2.72 Å. There are two shorter (2.72 Å) and two longer (3.03 Å) Ta–Al bond lengths. There are two inequivalent Al sites. In the first Al site, Al is bonded in a 10-coordinate geometry to nine Ta and one Al atom. The Al–Al bond length is 2.79 Å. In the second Al site, Al is bonded to twelve Ta atoms to form edge-sharing AlTa12 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ta4AgS8 by Materials Project

Ta4AgS8 crystallizes in the triclinic P-1 space group. The structure is two-dimensional and consists of one Ta4AgS8 sheet oriented in the (0, 0, 1) direction. there are four inequivalent Ta+3.75+ sites. In the first Ta+3.75+ site, Ta+3.75+ is bonded to six S2- atoms to form distorted edge-sharing TaS6 pentagonal pyramids. There are a spread of Ta–S bond distances ranging from 2.47–2.51 Å. In the second Ta+3.75+ site, Ta+3.75+ is bonded to six S2- atoms to form distorted edge-sharing TaS6 pentagonal pyramids. There are a spread of Ta–S bond distances ranging from 2.47–2.51 Å. In the third Ta+3.75+ site, Ta+3.75+ is bonded to six S2- atoms to form distorted edge-sharing TaS6 pentagonal pyramids. There are a spread of Ta–S bond distances ranging from 2.47–2.52 Å. In the fourth Ta+3.75+ site, Ta+3.75+ is bonded to six S2- atoms to form distorted edge-sharing TaS6 pentagonal pyramids. There are a spread of Ta–S bond distances ranging from 2.47–2.50 Å. Ag1+ is bonded in a 4-coordinate geometry to four S2- atoms. There are a spread of Ag–S bond distances ranging from 2.46–2.67 Å. There are eight inequivalent S2- sites. In the first S2- site, S2- is bonded to three Ta+3.75+ and one Ag1+ atom to form a mixture of distorted edge and corner-sharing STa3Ag trigonal pyramids. In the second S2- site, S2- is bonded in a 3-coordinate geometry to three Ta+3.75+ atoms. In the third S2- site, S2- is bonded to three Ta+3.75+ and one Ag1+ atom to form a mixture of distorted edge and corner-sharing STa3Ag trigonal pyramids. In the fourth S2- site, S2- is bonded in a 3-coordinate geometry to three Ta+3.75+ atoms. In the fifth S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Ta+3.75+ and one Ag1+ atom. In the sixth S2- site, S2- is bonded in a distorted T-shaped geometry to three Ta+3.75+ atoms. In the seventh S2- site, S2- is bonded to three Ta+3.75+ and one Ag1+ atom to form a mixture of distorted edge and corner-sharing STa3Ag trigonal pyramids. In the eighth S2- site, S2- is bonded in a distorted T-shaped geometry to three Ta+3.75+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ta2Al by Materials Project

Ta2Al is beta Uranium-derived structured and crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. there are three inequivalent Ta sites. In the first Ta site, Ta is bonded in a 9-coordinate geometry to nine Ta and six Al atoms. There are a spread of Ta–Ta bond distances ranging from 2.75–3.30 Å. There are two shorter (2.98 Å) and four longer (3.08 Å) Ta–Al bond lengths. In the second Ta site, Ta is bonded in a 6-coordinate geometry to two Ta and four equivalent Al atoms. The Ta–Ta bond length is 2.67 Å. There are a spread of Ta–Al bond distances ranging from 2.78–2.84 Å. In the third Ta site, Ta is bonded in a 7-coordinate geometry to five Ta and five Al atoms. There are one shorter (2.59 Å) and one longer (2.63 Å) Ta–Ta bond lengths. There are a spread of Ta–Al bond distances ranging from 2.87–2.90 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded to eight Ta and four equivalent Al atoms to form AlTa8Al4 cuboctahedra that share corners with sixteen equivalent AlTa10Al2 cuboctahedra, edges with two equivalent AlTa8Al4 cuboctahedra, and faces with four equivalent AlTa10Al2 cuboctahedra. All Al–Al bond lengths are 2.69 Å. In the second Al site, Al is bonded to ten Ta and two Al atoms to form AlTa10Al2 cuboctahedra that share corners with eleven AlTa8Al4 cuboctahedra, edges with three equivalent AlTa10Al2 cuboctahedra, and faces with seven AlTa8Al4 cuboctahedra. The Al–Al bond length is 2.77 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ta4AgS8 by Materials Project

Ta4AgS8 crystallizes in the monoclinic Pm space group. The structure is two-dimensional and consists of one Ta4AgS8 sheet oriented in the (0, 0, 1) direction. there are four inequivalent Ta+3.75+ sites. In the first Ta+3.75+ site, Ta+3.75+ is bonded to six S2- atoms to form distorted edge-sharing TaS6 pentagonal pyramids. There are a spread of Ta–S bond distances ranging from 2.46–2.52 Å. In the second Ta+3.75+ site, Ta+3.75+ is bonded to six S2- atoms to form distorted edge-sharing TaS6 pentagonal pyramids. There are a spread of Ta–S bond distances ranging from 2.47–2.51 Å. In the third Ta+3.75+ site, Ta+3.75+ is bonded to six S2- atoms to form distorted edge-sharing TaS6 pentagonal pyramids. There are a spread of Ta–S bond distances ranging from 2.47–2.54 Å. In the fourth Ta+3.75+ site, Ta+3.75+ is bonded to six S2- atoms to form distorted edge-sharing TaS6 pentagonal pyramids. There are a spread of Ta–S bond distances ranging from 2.46–2.52 Å. Ag1+ is bonded in a 4-coordinate geometry to four S2- atoms. There are a spread of Ag–S bond distances ranging from 2.45–2.73 Å. There are eight inequivalent S2- sites. In the first S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Ta+3.75+ and one Ag1+ atom. In the second S2- site, S2- is bonded in a distorted T-shaped geometry to three Ta+3.75+ atoms. In the third S2- site, S2- is bonded to three Ta+3.75+ and one Ag1+ atom to form distorted corner-sharing STa3Ag trigonal pyramids. In the fourth S2- site, S2- is bonded in a 5-coordinate geometry to three Ta+3.75+ and two equivalent Ag1+ atoms. In the fifth S2- site, S2- is bonded in a distorted T-shaped geometry to three Ta+3.75+ atoms. In the sixth S2- site, S2- is bonded in a distorted T-shaped geometry to three Ta+3.75+ atoms. In the seventh S2- site, S2- is bonded in a distorted T-shaped geometry to three Ta+3.75+ atoms. In the eighth S2- site, S2- is bonded in a distorted T-shaped geometry to three Ta+3.75+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ta3Ru2 by Materials Project

Ta3Ru2 crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. there are four inequivalent Ta sites. In the first Ta site, Ta is bonded in a 8-coordinate geometry to four equivalent Ta and four equivalent Ru atoms. All Ta–Ta bond lengths are 2.81 Å. All Ta–Ru bond lengths are 2.82 Å. In the second Ta site, Ta is bonded in a body-centered cubic geometry to eight Ru atoms. There are four shorter (2.74 Å) and four longer (2.75 Å) Ta–Ru bond lengths. In the third Ta site, Ta is bonded in a body-centered cubic geometry to eight equivalent Ru atoms. All Ta–Ru bond lengths are 2.77 Å. In the fourth Ta site, Ta is bonded in a 8-coordinate geometry to twelve Ta and two equivalent Ru atoms. All Ta–Ta bond lengths are 3.22 Å. Both Ta–Ru bond lengths are 3.31 Å. There are two inequivalent Ru sites. In the first Ru site, Ru is bonded in a body-centered cubic geometry to nine Ta atoms. In the second Ru site, Ru is bonded in a body-centered cubic geometry to eight Ta atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ta2S by Materials Project

Ta2S crystallizes in the orthorhombic Pbcm space group. The structure is three-dimensional. there are four inequivalent Ta sites. In the first Ta site, Ta is bonded to twelve Ta atoms to form TaTa12 cuboctahedra that share corners with two equivalent TaTa12 cuboctahedra, corners with two equivalent STa6 pentagonal pyramids, corners with six equivalent STa4 trigonal pyramids, edges with two equivalent STa6 pentagonal pyramids, edges with two equivalent STa4 trigonal pyramids, faces with two equivalent TaTa12 cuboctahedra, faces with two equivalent STa6 pentagonal pyramids, and faces with two equivalent STa4 trigonal pyramids. There are a spread of Ta–Ta bond distances ranging from 2.82–2.99 Å. In the second Ta site, Ta is bonded in a distorted T-shaped geometry to two equivalent Ta and three S atoms. There are a spread of Ta–S bond distances ranging from 2.46–2.59 Å. In the third Ta site, Ta is bonded in a 3-coordinate geometry to two equivalent Ta and three S atoms. There are a spread of Ta–S bond distances ranging from 2.46–2.63 Å. In the fourth Ta site, Ta is bonded in a bent 150 degrees geometry to two equivalent Ta and two equivalent S atoms. Both Ta–S bond lengths are 2.46 Å. There are two inequivalent S sites. In the first S site, S is bonded to four Ta atoms to form distorted STa4 trigonal pyramids that share corners with three equivalent TaTa12 cuboctahedra, corners with four equivalent STa6 pentagonal pyramids, corners with three equivalent STa4 trigonal pyramids, an edgeedge with one TaTa12 cuboctahedra, and a faceface with one TaTa12 cuboctahedra. In the second S site, S is bonded to six Ta atoms to form distorted STa6 pentagonal pyramids that share corners with two equivalent TaTa12 cuboctahedra, corners with eight equivalent STa4 trigonal pyramids, edges with two equivalent TaTa12 cuboctahedra, edges with two equivalent STa6 pentagonal pyramids, and faces with two equivalent TaTa12 cuboctahedra.

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 Ta2NbTeI7 by Materials Project

TaNb2TeI7Ta3TeI7 crystallizes in the monoclinic Cm space group. The structure is two-dimensional and consists of one Ta3TeI7 sheet oriented in the (0, 0, 1) direction and one TaNb2TeI7 sheet oriented in the (0, 0, 1) direction. In the Ta3TeI7 sheet, there are two inequivalent Ta+3.50+ sites. In the first Ta+3.50+ site, Ta+3.50+ is bonded to one Te2- and five I1- atoms to form distorted edge-sharing TaTeI5 octahedra. The Ta–Te bond length is 2.73 Å. There are a spread of Ta–I bond distances ranging from 2.75–3.07 Å. In the second Ta+3.50+ site, Ta+3.50+ is bonded to one Te2- and five I1- atoms to form distorted edge-sharing TaTeI5 octahedra. The Ta–Te bond length is 2.73 Å. There are a spread of Ta–I bond distances ranging from 2.75–3.07 Å. Te2- is bonded in a 12-coordinate geometry to three Ta+3.50+ atoms. There are three inequivalent I1- sites. In the first I1- site, I1- is bonded in a water-like geometry to two equivalent Ta+3.50+ atoms. In the second I1- site, I1- is bonded in a 3-coordinate geometry to two equivalent Ta+3.50+ atoms. In the third I1- site, I1- is bonded in a distorted trigonal non-coplanar geometry to three Ta+3.50+ atoms. In the TaNb2TeI7 sheet, Ta+3.50+ is bonded to one Te2- and five I1- atoms to form distorted TaTeI5 octahedra that share edges with four equivalent NbTeI5 octahedra. The Ta–Te bond length is 2.72 Å. There are a spread of Ta–I bond distances ranging from 2.75–3.05 Å. Nb2+ is bonded to one Te2- and five I1- atoms to form distorted NbTeI5 octahedra that share edges with two equivalent TaTeI5 octahedra and edges with two equivalent NbTeI5 octahedra. The Nb–Te bond length is 2.74 Å. There are a spread of Nb–I bond distances ranging from 2.76–3.06 Å. Te2- is bonded in a 12-coordinate geometry to one Ta+3.50+ and two equivalent Nb2+ atoms. There are five inequivalent I1- sites. In the first I1- site, I1- is bonded in a water-like geometry to two equivalent Nb2+ atoms. In the second I1- site, I1- is bonded in a water-like geometry to one Ta+3.50+ and one Nb2+ atom. In the third I1- site, I1- is bonded in a 3-coordinate geometry to two equivalent Nb2+ atoms. In the fourth I1- site, I1- is bonded in a 2-coordinate geometry to one Ta+3.50+ and one Nb2+ atom. In the fifth I1- site, I1- is bonded in a distorted trigonal non-coplanar geometry to one Ta+3.50+ and two equivalent Nb2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ta4(CuNi3)3 by Materials Project

Ta4(Ni3Cu)3 is beta Cu3Ti-derived structured and crystallizes in the orthorhombic Pmm2 space group. The structure is three-dimensional. there are three inequivalent Ta sites. In the first Ta site, Ta is bonded to nine Ni and three Cu atoms to form TaCu3Ni9 cuboctahedra that share corners with two equivalent TaCu3Ni9 cuboctahedra, corners with four equivalent CuTa4Ni8 cuboctahedra, corners with twelve NiTa4Ni8 cuboctahedra, edges with six TaCu3Ni9 cuboctahedra, edges with twelve NiTa4Cu2Ni6 cuboctahedra, faces with five CuTa4Ni8 cuboctahedra, faces with six TaCu3Ni9 cuboctahedra, and faces with nine NiTa4Ni8 cuboctahedra. There are a spread of Ta–Ni bond distances ranging from 2.54–2.65 Å. There are one shorter (2.65 Å) and two longer (2.67 Å) Ta–Cu bond lengths. In the second Ta site, Ta is bonded to eight Ni and four Cu atoms to form TaCu4Ni8 cuboctahedra that share corners with two equivalent TaCu2Ni10 cuboctahedra, corners with eight equivalent NiTa4Cu4Ni4 cuboctahedra, corners with eight equivalent CuTa4Ni8 cuboctahedra, edges with six TaCu3Ni9 cuboctahedra, edges with twelve NiTa4Cu2Ni6 cuboctahedra, faces with six TaCu3Ni9 cuboctahedra, faces with six CuTa4Ni8 cuboctahedra, and faces with eight NiTa4Cu4Ni4 cuboctahedra. There are a spread of Ta–Ni bond distances ranging from 2.57–2.63 Å. There are two shorter (2.59 Å) and two longer (2.67 Å) Ta–Cu bond lengths. In the third Ta site, Ta is bonded to ten Ni and two equivalent Cu atoms to form TaCu2Ni10 cuboctahedra that share corners with two equivalent TaCu4Ni8 cuboctahedra, corners with eight equivalent NiTa4Cu2Ni6 cuboctahedra, corners with eight equivalent CuTa4Ni8 cuboctahedra, edges with six TaCu3Ni9 cuboctahedra, edges with twelve NiTa4Cu2Ni6 cuboctahedra, faces with two equivalent CuTa4Ni8 cuboctahedra, faces with six TaCu3Ni9 cuboctahedra, and faces with twelve NiTa4Ni8 cuboctahedra. There are a spread of Ta–Ni bond distances ranging from 2.53–2.64 Å. Both Ta–Cu bond lengths are 2.60 Å. There are five inequivalent Ni sites. In the first Ni site, Ni is bonded to four Ta and eight Ni atoms to form distorted NiTa4Ni8 cuboctahedra that share corners with two equivalent CuTa4Ni8 cuboctahedra, corners with eight equivalent TaCu3Ni9 cuboctahedra, corners with eight equivalent NiTa4Cu2Ni6 cuboctahedra, edges with four equivalent CuTa4Ni8 cuboctahedra, edges with fourteen NiTa4Ni8 cuboctahedra, faces with four equivalent CuTa4Ni8 cuboctahedra, faces with six TaCu3Ni9 cuboctahedra, and faces with ten NiTa4Ni8 cuboctahedra. There are two shorter (2.53 Å) and six longer (2.62 Å) Ni–Ni bond lengths. In the second Ni site, Ni is bonded to four Ta, six Ni, and two equivalent Cu atoms to form distorted NiTa4Cu2Ni6 cuboctahedra that share corners with four equivalent TaCu3Ni9 cuboctahedra, corners with fourteen NiTa4Cu2Ni6 cuboctahedra, edges with six TaCu3Ni9 cuboctahedra, edges with six NiTa4Cu2Ni6 cuboctahedra, edges with six CuTa4Ni8 cuboctahedra, faces with two equivalent CuTa4Ni8 cuboctahedra, faces with four TaCu3Ni9 cuboctahedra, and faces with fourteen NiTa4Ni8 cuboctahedra. There are a spread of Ni–Ni bond distances ranging from 2.54–2.62 Å. Both Ni–Cu bond lengths are 2.62 Å. In the third Ni site, Ni is bonded to four Ta, four Ni, and four Cu atoms to form distorted NiTa4Cu4Ni4 cuboctahedra that share corners with four equivalent TaCu3Ni9 cuboctahedra, corners with four equivalent CuTa4Ni8 cuboctahedra, corners with ten NiTa4Cu2Ni6 cuboctahedra, edges with four equivalent CuTa4Ni8 cuboctahedra, edges with six TaCu3Ni9 cuboctahedra, edges with eight NiTa4Ni8 cuboctahedra, faces with four TaCu3Ni9 cuboctahedra, faces with four CuTa4Ni8 cuboctahedra, and faces with twelve NiTa4Cu2Ni6 cuboctahedra. There are one shorter (2.59 Å) and two longer (2.64 Å) Ni–Ni bond lengths. There are a spread of Ni–Cu bond distances ranging from 2.52–2.66 Å. In the fourth Ni site, Ni is bonded to four Ta, six Ni, and two equivalent Cu atoms to form distorted NiTa4Cu2Ni6 cuboctahedra that share corners with four equivalent TaCu2Ni10 cuboctahedra, corners with four equivalent CuTa4Ni8 cuboctahedra, corners with ten NiTa4Cu2Ni6 cuboctahedra, edges with four CuTa4Ni8 cuboctahedra, edges with six TaCu3Ni9 cuboctahedra, edges with eight NiTa4Ni8 cuboctahedra, faces with two equivalent CuTa4Ni8 cuboctahedra, faces with four TaCu3Ni9 cuboctahedra, and faces with fourteen NiTa4Ni8 cuboctahedra. Both Ni–Ni bond lengths are 2.58 Å. There are one shorter (2.50 Å) and one longer (2.68 Å) Ni–Cu bond lengths. In the fifth Ni site, Ni is bonded to four Ta, four Ni, and four Cu atoms to form distorted NiTa4Cu4Ni4 cuboctahedra that share corners with four equivalent TaCu4Ni8 cuboctahedra, corners with four equivalent CuTa4Ni8 cuboctahedra, corners with ten NiTa4Cu2Ni6 cuboctahedra, edges with four CuTa4Ni8 cuboctahedra, edges with six TaCu3Ni9 cuboctahedra, edges with eight NiTa4Ni8 cuboctahedra, faces with four TaCu3Ni9 cuboctahedra, faces with four CuTa4Ni8 cuboctahedra, and faces with twelve NiTa4Cu2Ni6 cuboctahedra. The Ni–Ni bond length is 2.62 Å. There are a spread of Ni–Cu bond distances ranging from 2.51–2.65 Å. There are two inequivalent Cu sites. In the first Cu site, Cu is bonded to four Ta and eight Ni atoms to form distorted CuTa4Ni8 cuboctahedra that share corners with two equivalent CuTa4Ni8 cuboctahedra, corners with eight TaCu4Ni8 cuboctahedra, corners with eight NiTa4Cu2Ni6 cuboctahedra, edges with four CuTa4Ni8 cuboctahedra, edges with fourteen NiTa4Ni8 cuboctahedra, faces with four CuTa4Ni8 cuboctahedra, faces with six TaCu3Ni9 cuboctahedra, and faces with ten NiTa4Ni8 cuboctahedra. In the second Cu site, Cu is bonded to four Ta and eight Ni atoms to form CuTa4Ni8 cuboctahedra that share corners with eight equivalent TaCu3Ni9 cuboctahedra, corners with ten NiTa4Cu4Ni4 cuboctahedra, edges with six CuTa4Ni8 cuboctahedra, edges with twelve NiTa4Cu2Ni6 cuboctahedra, faces with six TaCu3Ni9 cuboctahedra, faces with six CuTa4Ni8 cuboctahedra, and faces with eight NiTa4Cu4Ni4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ta17Al12 by Materials Project

Ta17Al12 is alpha-derived structured and crystallizes in the cubic I-43m space group. The structure is three-dimensional. there are three inequivalent Ta sites. In the first Ta site, Ta is bonded in a 12-coordinate geometry to four equivalent Ta and twelve equivalent Al atoms. All Ta–Ta bond lengths are 3.07 Å. All Ta–Al bond lengths are 3.05 Å. In the second Ta site, Ta is bonded in a 9-coordinate geometry to four Ta and nine equivalent Al atoms. All Ta–Ta bond lengths are 2.86 Å. There are six shorter (2.98 Å) and three longer (3.30 Å) Ta–Al bond lengths. In the third Ta site, Ta is bonded in a 12-coordinate geometry to seven Ta and five equivalent Al atoms. There are two shorter (2.83 Å) and four longer (3.04 Å) Ta–Ta bond lengths. There are a spread of Ta–Al bond distances ranging from 2.72–2.92 Å. Al is bonded in a 12-coordinate geometry to nine Ta and three equivalent Al atoms. There are one shorter (2.56 Å) and two longer (2.63 Å) Al–Al bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb8Ta6O23 by Materials Project

Rb8Ta6O23 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are five inequivalent Rb sites. In the first Rb site, Rb is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Rb–O bond distances ranging from 2.82–3.44 Å. In the second Rb site, Rb is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Rb–O bond distances ranging from 2.81–3.15 Å. In the third Rb site, Rb is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Rb–O bond distances ranging from 2.76–3.40 Å. In the fourth Rb site, Rb is bonded in a 5-coordinate geometry to six O atoms. There are a spread of Rb–O bond distances ranging from 2.76–3.51 Å. In the fifth Rb site, Rb is bonded to six O atoms to form edge-sharing RbO6 octahedra. There are a spread of Rb–O bond distances ranging from 2.81–3.11 Å. There are three inequivalent Ta sites. In the first Ta site, Ta is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Ta–O bond distances ranging from 1.81–2.41 Å. In the second Ta site, Ta is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Ta–O bond distances ranging from 1.81–2.42 Å. In the third Ta site, Ta is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Ta–O bond distances ranging from 1.82–2.37 Å. There are twelve inequivalent O sites. In the first O site, O is bonded in a distorted single-bond geometry to four Rb and one Ta atom. In the second O site, O is bonded in a distorted bent 120 degrees geometry to three Rb and two Ta atoms. In the third O site, O is bonded in a 5-coordinate geometry to five Rb atoms. In the fourth O site, O is bonded in a 2-coordinate geometry to two Rb and two Ta atoms. In the fifth O site, O is bonded in a bent 120 degrees geometry to two Ta atoms. In the sixth O site, O is bonded to six Ta atoms to form edge-sharing OTa6 octahedra. In the seventh O site, O is bonded in a distorted bent 120 degrees geometry to one Rb and two Ta atoms. In the eighth O site, O is bonded to two Rb and two Ta atoms to form distorted ORb2Ta2 tetrahedra that share a cornercorner with one ORb2Ta2 tetrahedra and an edgeedge with one OTa6 octahedra. In the ninth O site, O is bonded in a distorted single-bond geometry to four Rb and one Ta atom. In the tenth O site, O is bonded in a distorted bent 120 degrees geometry to one Rb and two Ta atoms. In the eleventh O site, O is bonded in a distorted single-bond geometry to three Rb and one Ta atom. In the twelfth O site, O is bonded in a distorted T-shaped geometry to three Rb atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ta4MoS10 by Materials Project

Ta4MoS10 is Molybdenite-derived structured and crystallizes in the monoclinic Cm space group. The structure is two-dimensional and consists of one Ta4MoS10 sheet oriented in the (2, 0, -1) direction. there are four inequivalent Ta+4.50+ sites. In the first Ta+4.50+ site, Ta+4.50+ is bonded to six S2- atoms to form distorted TaS6 pentagonal pyramids that share edges with two equivalent MoS6 pentagonal pyramids and edges with four TaS6 pentagonal pyramids. There are four shorter (2.47 Å) and two longer (2.50 Å) Ta–S bond lengths. In the second Ta+4.50+ site, Ta+4.50+ is bonded to six S2- atoms to form distorted edge-sharing TaS6 pentagonal pyramids. There are two shorter (2.48 Å) and four longer (2.49 Å) Ta–S bond lengths. In the third Ta+4.50+ site, Ta+4.50+ is bonded to six S2- atoms to form distorted edge-sharing TaS6 pentagonal pyramids. There are four shorter (2.48 Å) and two longer (2.49 Å) Ta–S bond lengths. In the fourth Ta+4.50+ site, Ta+4.50+ is bonded to six S2- atoms to form distorted TaS6 pentagonal pyramids that share edges with two equivalent MoS6 pentagonal pyramids and edges with four TaS6 pentagonal pyramids. There are two shorter (2.43 Å) and four longer (2.50 Å) Ta–S bond lengths. Mo2+ is bonded to six S2- atoms to form distorted MoS6 pentagonal pyramids that share edges with two equivalent MoS6 pentagonal pyramids and edges with four TaS6 pentagonal pyramids. There are two shorter (2.45 Å) and four longer (2.46 Å) Mo–S bond lengths. There are seven inequivalent S2- sites. In the first S2- site, S2- is bonded in a 3-coordinate geometry to one Ta+4.50+ and two equivalent Mo2+ atoms. In the second S2- site, S2- is bonded in a 3-coordinate geometry to three Ta+4.50+ atoms. In the third S2- site, S2- is bonded in a distorted T-shaped geometry to three Ta+4.50+ atoms. In the fourth S2- site, S2- is bonded in a 3-coordinate geometry to two equivalent Ta+4.50+ and one Mo2+ atom. In the fifth S2- site, S2- is bonded in a distorted T-shaped geometry to three Ta+4.50+ atoms. In the sixth S2- site, S2- is bonded in a 3-coordinate geometry to two equivalent Ta+4.50+ and one Mo2+ atom. In the seventh S2- site, S2- is bonded in a distorted T-shaped geometry to three Ta+4.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TaCo3 by Materials Project

Co3Ta crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. there are three inequivalent Ta sites. In the first Ta site, Ta is bonded in a 12-coordinate geometry to four Ta and twelve Co atoms. There are one shorter (2.81 Å) and three longer (2.91 Å) Ta–Ta bond lengths. There are a spread of Ta–Co bond distances ranging from 2.74–2.81 Å. In the second Ta site, Ta is bonded in a 6-coordinate geometry to fifteen Co atoms. There are a spread of Ta–Co bond distances ranging from 2.65–2.88 Å. In the third Ta site, Ta is bonded in a 12-coordinate geometry to three equivalent Ta and twelve Co atoms. There are nine shorter (2.76 Å) and three longer (2.81 Å) Ta–Co bond lengths. There are six inequivalent Co sites. In the first Co site, Co is bonded to five Ta and seven Co atoms to form distorted CoTa5Co7 cuboctahedra that share corners with eighteen CoTa5Co7 cuboctahedra, edges with six CoTa2Co10 cuboctahedra, and faces with eighteen CoTa5Co7 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.29–2.82 Å. In the second Co site, Co is bonded to two equivalent Ta and ten Co atoms to form distorted CoTa2Co10 cuboctahedra that share corners with eighteen CoTa3Co9 cuboctahedra, edges with six CoTa2Co10 cuboctahedra, and faces with eighteen CoTa5Co7 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.35–2.70 Å. In the third Co site, Co is bonded to six Ta and six Co atoms to form CoTa6Co6 cuboctahedra that share corners with eighteen CoTa6Co6 cuboctahedra, edges with six CoTa5Co7 cuboctahedra, and faces with eighteen CoTa5Co7 cuboctahedra. There are four shorter (2.35 Å) and two longer (2.40 Å) Co–Co bond lengths. In the fourth Co site, Co is bonded to three equivalent Ta and nine Co atoms to form distorted CoTa3Co9 cuboctahedra that share corners with fifteen CoTa5Co7 cuboctahedra, edges with six equivalent CoTa3Co9 cuboctahedra, and faces with nineteen CoTa5Co7 cuboctahedra. All Co–Co bond lengths are 2.79 Å. In the fifth Co site, Co is bonded to six Ta and six Co atoms to form CoTa6Co6 cuboctahedra that share corners with fifteen CoTa5Co7 cuboctahedra, edges with six equivalent CoTa6Co6 cuboctahedra, and faces with nineteen CoTa5Co7 cuboctahedra. In the sixth Co site, Co is bonded in a 3-coordinate geometry to three equivalent Ta and thirteen Co atoms. The Co–Co bond length is 2.66 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2023

LANL Meteorological Program: 2022 Data Completeness/Quality Report

Los Alamos National Laboratory (LANL) operates seven mesa-top instrumented meteorology towers: Technical Area (TA) 6, TA-49, TA-53, TA-54, TA-63, TA-54B, and TA-16B. An additional instrumented tower is located in Mortandad Canyon (TA-5 MDCN), and there is a rain gauge at North Community (NCOM), located within the town of Los Alamos. The 10 meter (m) towers at TA-63, TA- 54B, and TA-16B were installed in 2021, and will be included in the 2023 data completeness/quality report. A description of the meteorology monitoring network, prior to the installation of the TA-63, TA-54B, and TA-16B is found in Dewart and Boggs (2014). Four of the mesa-top towers (e.g., TA-6, TA-49, TA-53, and TA-54) are instrumented at the 1.2 m, 11.5 m, 23 m, and 46 m levels. In addition, the TA-6 tower is instrumented at the 92 m level. The TA-5 MDCN tower is 10 m in height and is instrumented at 1.2 m and 10 m. Data are collected and averaged every 15 minutes. Range checking is performed on each measurement every 15 minutes; data that are beyond normal ranges are eliminated from the data set and replaced by a code for missing data. In addition, data are reviewed weekly by qualified meteorologists to identify bad data not identified by the range checking technique. The data steward eliminates these data from the data set and replaces them with a code for missing data. The instrument technicians also review that data and schedule instrument replacement, as required. All instruments are calibrated at a frequency that meets the criteria identified in ANSI/ANS-3.11-2015. Data completeness is determined by the number of total 15-minute records available versus the number of possible measurements for the entire year. As a rule, the meteorologists do not attempt to estimate data that are eliminated as bad data. Original datalogger records, including bad data, can be recalled from program archival storage.

54 ENVIRONMENTAL SCIENCES↗
DOE OSTI2024

LANL Meteorological Program: 2023 Data Completeness/Quality Report

Los Alamos National Laboratory (LANL) operates seven mesa-top instrumented meteorology towers: Technical Area (TA) 6, TA-49, TA-53, TA-54, TA-63, TA-54B, and TA-16B. An additional instrumented tower is located in Mortandad Canyon (TA-5 MDCN), and there is a rain gauge at North Community (NCOM), located within the town of Los Alamos. The 10 meter (m) towers at TA-63, TA-54B, and TA-16B have been in testing since they were installed in 2021, and will be included in a future data completeness report. A description of the meteorology monitoring network, prior to the installation of the TA-63, TA-54B, and TA-16B is found in Dewart and Boggs (2014). Four of the mesa-top towers (e.g., TA-6, TA-49, TA-53, and TA-54) are instrumented at the 1.2 m, 11.5 m, 23 m, and 46 m levels. In addition, the TA-6 tower is instrumented at the 92 m level. The TA-5 MDCN tower is 10 m in height and is instrumented at 1.2 m and 10 m. Data are collected and averaged every 15 minutes. Range checking is performed on each measurement every 15 minutes; data that are beyond normal ranges are eliminated from the data set and replaced by a code for missing data. In addition, data are reviewed weekly by qualified meteorologists to identify bad data not identified by the range checking technique. The data steward eliminates these data from the data set and replaces them with a code for missing data. The instrument technicians also review that data and schedule instrument replacement, as required. All instruments are calibrated at a frequency that meets the criteria identified in ANSI/ANS-3.11-2015. Data completeness is determined by the number of total 15-minute records available versus the number of possible measurements for the entire year. As a rule, the meteorologists do not attempt to estimate data that are eliminated as bad data. Original datalogger records, including bad data, can be recalled from program archival storage.

54 ENVIRONMENTAL SCIENCES↗
DOE OSTI2020

Materials Data on Rb2Ta15O32 by Materials Project

Rb2Ta15O32 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. Rb1+ is bonded to twelve O2- atoms to form distorted RbO12 cuboctahedra that share corners with six TaO6 octahedra, edges with three equivalent RbO12 cuboctahedra, edges with three equivalent TaO6 octahedra, edges with three equivalent TaO5 square pyramids, and faces with three equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 40–58°. There are a spread of Rb–O bond distances ranging from 3.05–3.27 Å. There are four inequivalent Ta+4.13+ sites. In the first Ta+4.13+ site, Ta+4.13+ is bonded to six equivalent O2- atoms to form TaO6 octahedra that share corners with six equivalent RbO12 cuboctahedra and corners with six equivalent TaO6 octahedra. The corner-sharing octahedral tilt angles are 32°. All Ta–O bond lengths are 2.00 Å. In the second Ta+4.13+ site, Ta+4.13+ is bonded to six O2- atoms to form TaO6 octahedra that share a cornercorner with one RbO12 cuboctahedra, corners with two TaO6 octahedra, corners with three equivalent TaO5 square pyramids, an edgeedge with one RbO12 cuboctahedra, edges with two equivalent TaO6 octahedra, and a faceface with one RbO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 32–43°. There are a spread of Ta–O bond distances ranging from 1.90–2.13 Å. In the third Ta+4.13+ site, Ta+4.13+ is bonded to five O2- atoms to form TaO5 square pyramids that share corners with four TaO6 octahedra, corners with four equivalent TaO5 square pyramids, an edgeedge with one RbO12 cuboctahedra, and an edgeedge with one TaO6 octahedra. The corner-sharing octahedra tilt angles range from 7–54°. There are a spread of Ta–O bond distances ranging from 2.05–2.20 Å. In the fourth Ta+4.13+ site, Ta+4.13+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with three equivalent TaO6 octahedra, corners with three equivalent TaO5 square pyramids, and edges with three equivalent TaO5 square pyramids. The corner-sharing octahedral tilt angles are 43°. There are three shorter (1.97 Å) and three longer (2.05 Å) Ta–O bond lengths. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Rb1+ and three Ta+4.13+ atoms. In the second O2- site, O2- is bonded in a T-shaped geometry to three Ta+4.13+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to three Ta+4.13+ atoms. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one Rb1+ and two Ta+4.13+ atoms. In the fifth O2- site, O2- is bonded in a distorted water-like geometry to two equivalent Rb1+ and two equivalent Ta+4.13+ atoms. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to three equivalent Ta+4.13+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li2Ta2O3 by Materials Project

Li2Ta2O3 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Li sites. In the first Li site, Li is bonded in a 4-coordinate geometry to four O atoms. There are a spread of Li–O bond distances ranging from 2.04–2.37 Å. In the second Li site, Li is bonded in a bent 120 degrees geometry to two O atoms. There are one shorter (1.99 Å) and one longer (2.01 Å) Li–O bond lengths. In the third Li site, Li is bonded in a 3-coordinate geometry to three O atoms. There are a spread of Li–O bond distances ranging from 2.02–2.27 Å. In the fourth Li site, Li is bonded in a 3-coordinate geometry to three O atoms. There are a spread of Li–O bond distances ranging from 2.03–2.37 Å. There are four inequivalent Ta sites. In the first Ta site, Ta is bonded in a T-shaped geometry to three O atoms. There are a spread of Ta–O bond distances ranging from 1.97–2.03 Å. In the second Ta site, Ta is bonded in a T-shaped geometry to three O atoms. There are a spread of Ta–O bond distances ranging from 1.95–2.01 Å. In the third Ta site, Ta is bonded in a T-shaped geometry to three O atoms. There are a spread of Ta–O bond distances ranging from 1.94–2.02 Å. In the fourth Ta site, Ta is bonded in a T-shaped geometry to three O atoms. There are a spread of Ta–O bond distances ranging from 1.98–2.03 Å. There are six inequivalent O sites. In the first O site, O is bonded in a rectangular see-saw-like geometry to two Li and two Ta atoms. In the second O site, O is bonded to two Li and two Ta atoms to form corner-sharing OLi2Ta2 trigonal pyramids. In the third O site, O is bonded to two Li and two Ta atoms to form corner-sharing OLi2Ta2 trigonal pyramids. In the fourth O site, O is bonded to two Li and two Ta atoms to form distorted corner-sharing OLi2Ta2 trigonal pyramids. In the fifth O site, O is bonded in a rectangular see-saw-like geometry to two Li and two Ta atoms. In the sixth O site, O is bonded in a 4-coordinate geometry to two Li and two Ta atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ta4Te9I4O by Materials Project

Ta4Te9OI4 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Ta+4.50+ sites. In the first Ta+4.50+ site, Ta+4.50+ is bonded in a 1-coordinate geometry to five Te+1.33-, one O2-, and one I1- atom. There are a spread of Ta–Te bond distances ranging from 2.83–2.92 Å. The Ta–O bond length is 2.18 Å. The Ta–I bond length is 2.83 Å. In the second Ta+4.50+ site, Ta+4.50+ is bonded in a distorted single-bond geometry to four Te+1.33-, one O2-, and one I1- atom. There are two shorter (2.80 Å) and two longer (2.94 Å) Ta–Te bond lengths. The Ta–O bond length is 1.99 Å. The Ta–I bond length is 2.82 Å. There are five inequivalent Te+1.33- sites. In the first Te+1.33- site, Te+1.33- is bonded in a 3-coordinate geometry to two Ta+4.50+, one Te+1.33-, and one I1- atom. The Te–Te bond length is 2.75 Å. The Te–I bond length is 3.58 Å. In the second Te+1.33- site, Te+1.33- is bonded in a 6-coordinate geometry to two Ta+4.50+, one Te+1.33-, and three I1- atoms. The Te–Te bond length is 2.75 Å. There are a spread of Te–I bond distances ranging from 3.59–4.23 Å. In the third Te+1.33- site, Te+1.33- is bonded in a 3-coordinate geometry to two Ta+4.50+, one Te+1.33-, and two I1- atoms. There are one shorter (3.57 Å) and one longer (4.26 Å) Te–I bond lengths. In the fourth Te+1.33- site, Te+1.33- is bonded in a 3-coordinate geometry to two Ta+4.50+ and one Te+1.33- atom. In the fifth Te+1.33- site, Te+1.33- is bonded in a 5-coordinate geometry to two equivalent Ta+4.50+ and one O2- atom. The Te–O bond length is 2.86 Å. O2- is bonded in a 4-coordinate geometry to four Ta+4.50+ and one Te+1.33- atom. There are two inequivalent I1- sites. In the first I1- site, I1- is bonded in a distorted single-bond geometry to one Ta+4.50+ and three Te+1.33- atoms. In the second I1- site, I1- is bonded in a distorted single-bond geometry to one Ta+4.50+ and three Te+1.33- atoms.

36 MATERIALS SCIENCE↗