SEARCH · Engineering Papers
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
TaVOs2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two TaVOs2 ribbons oriented in the (1, 0, 0) direction. Ta is bonded in a linear geometry to two equivalent Os atoms. Both Ta–Os bond lengths are 2.31 Å. V is bonded in a linear geometry to two equivalent Os atoms. Both V–Os bond lengths are 2.35 Å. Os is bonded in a linear geometry to one Ta and one V atom.
TaRh2Ga crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two TaRh2Ga ribbons oriented in the (1, 0, 0) direction. Ta is bonded in a linear geometry to two equivalent Rh atoms. Both Ta–Rh bond lengths are 2.18 Å. Rh is bonded in a linear geometry to one Ta and one Ga atom. The Rh–Ga bond length is 2.46 Å. Ga is bonded in a linear geometry to two equivalent Rh atoms.
HfTaOs2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfTaOs2 ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Os atoms. Both Hf–Os bond lengths are 2.43 Å. Ta is bonded in a linear geometry to two equivalent Os atoms. Both Ta–Os bond lengths are 2.30 Å. Os is bonded in a linear geometry to one Hf and one Ta atom.
TaNb2W crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two TaNb2W ribbons oriented in the (1, 0, 0) direction. Ta is bonded in a linear geometry to two equivalent Nb atoms. Both Ta–Nb bond lengths are 2.40 Å. Nb is bonded in a linear geometry to one Ta and one W atom. The Nb–W bond length is 2.29 Å. W is bonded in a linear geometry to two equivalent Nb atoms.
TaRu3 is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ta is bonded to twelve equivalent Ru atoms to form TaRu12 cuboctahedra that share corners with six equivalent TaRu12 cuboctahedra, corners with twelve equivalent RuTa4Ru8 cuboctahedra, edges with eighteen equivalent RuTa4Ru8 cuboctahedra, faces with eight equivalent TaRu12 cuboctahedra, and faces with twelve equivalent RuTa4Ru8 cuboctahedra. There are six shorter (2.73 Å) and six longer (2.80 Å) Ta–Ru bond lengths. Ru is bonded to four equivalent Ta and eight equivalent Ru atoms to form distorted RuTa4Ru8 cuboctahedra that share corners with four equivalent TaRu12 cuboctahedra, corners with fourteen equivalent RuTa4Ru8 cuboctahedra, edges with six equivalent TaRu12 cuboctahedra, edges with twelve equivalent RuTa4Ru8 cuboctahedra, faces with four equivalent TaRu12 cuboctahedra, and faces with sixteen equivalent RuTa4Ru8 cuboctahedra. There are four shorter (2.73 Å) and four longer (2.80 Å) Ru–Ru bond lengths.
EuTa3O9 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Eu3+ is bonded to twelve O2- atoms to form EuO12 cuboctahedra that share corners with three equivalent EuO12 cuboctahedra, faces with two equivalent EuO12 cuboctahedra, and faces with eight TaO6 octahedra. There are a spread of Eu–O bond distances ranging from 2.65–2.80 Å. There are three inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TaO6 octahedra and faces with three equivalent EuO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–16°. There are a spread of Ta–O bond distances ranging from 1.93–2.06 Å. In the second Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TaO6 octahedra and faces with two equivalent EuO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–13°. There are a spread of Ta–O bond distances ranging from 1.96–2.01 Å. In the third Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TaO6 octahedra and faces with three equivalent EuO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 2–16°. There are a spread of Ta–O bond distances ranging from 1.91–2.08 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to two equivalent Eu3+ and two equivalent Ta5+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Eu3+ and two Ta5+ atoms. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Eu3+ and two Ta5+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Eu3+ and two Ta5+ atoms. In the fifth O2- site, O2- is bonded in a linear geometry to two equivalent Ta5+ atoms. In the sixth O2- site, O2- is bonded in a linear geometry to two Ta5+ atoms. In the seventh O2- site, O2- is bonded in a distorted linear geometry to three equivalent Eu3+ and two Ta5+ atoms.
Ba3Ti6Ta2O21 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. Ba is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of Ba–O bond distances ranging from 2.79–3.17 Å. Ti is bonded to six O atoms to form TiO6 octahedra that share corners with two equivalent TaO6 octahedra, corners with three equivalent TiO6 octahedra, and edges with two equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 18–46°. There are a spread of Ti–O bond distances ranging from 1.86–2.05 Å. Ta is bonded to six equivalent O atoms to form TaO6 octahedra that share corners with six equivalent TiO6 octahedra. The corner-sharing octahedral tilt angles are 40°. All Ta–O bond lengths are 2.00 Å. There are three inequivalent O sites. In the first O site, O is bonded in a 4-coordinate geometry to one Ba and three equivalent Ti atoms. In the second O site, O is bonded in a 2-coordinate geometry to two equivalent Ba, one Ti, and one Ta atom. In the third O site, O is bonded in a distorted bent 150 degrees geometry to two equivalent Ba and two equivalent Ti atoms.
Ta2O5 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are three inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing TaO6 octahedra. The corner-sharing octahedra tilt angles range from 0–35°. There are a spread of Ta–O bond distances ranging from 1.92–2.23 Å. In the second Ta5+ site, Ta5+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ta–O bond distances ranging from 1.91–2.56 Å. In the third Ta5+ site, Ta5+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing TaO6 octahedra. The corner-sharing octahedra tilt angles range from 13–32°. There are a spread of Ta–O bond distances ranging from 1.93–2.17 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to two equivalent Ta5+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Ta5+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the fourth O2- site, O2- is bonded in a trigonal planar geometry to three Ta5+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the sixth O2- site, O2- is bonded in a distorted linear geometry to three Ta5+ atoms. In the seventh O2- site, O2- is bonded in a linear geometry to two equivalent Ta5+ atoms. In the eighth O2- site, O2- is bonded in a linear geometry to two equivalent Ta5+ atoms.
Ta2(Co7B2)3 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Ta is bonded in a distorted tetrahedral geometry to four equivalent Co atoms. All Ta–Co bond lengths are 2.43 Å. There are three inequivalent Co sites. In the first Co site, Co is bonded in a cuboctahedral geometry to twelve equivalent Co atoms. All Co–Co bond lengths are 2.51 Å. In the second Co site, Co is bonded to one Ta and three equivalent B atoms to form a mixture of edge and corner-sharing CoTaB3 tetrahedra. All Co–B bond lengths are 2.07 Å. In the third Co site, Co is bonded in a distorted bent 150 degrees geometry to one Co and two equivalent B atoms. Both Co–B bond lengths are 2.09 Å. B is bonded in a 8-coordinate geometry to eight Co atoms.
BeTaOs2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two BeTaOs2 ribbons oriented in the (1, 0, 0) direction. Be is bonded in a linear geometry to two equivalent Os atoms. Both Be–Os bond lengths are 2.25 Å. Ta is bonded in a linear geometry to two equivalent Os atoms. Both Ta–Os bond lengths are 2.24 Å. Os is bonded in a linear geometry to one Be and one Ta atom.
Ba3LaTa3O12 crystallizes in the trigonal R3m space group. The structure is three-dimensional. there are three inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded to twelve O2- atoms to form BaO12 cuboctahedra that share corners with six equivalent BaO12 cuboctahedra, faces with six BaO12 cuboctahedra, and faces with seven TaO6 octahedra. There are a spread of Ba–O bond distances ranging from 2.82–2.91 Å. In the second Ba2+ site, Ba2+ is bonded to twelve O2- atoms to form BaO12 cuboctahedra that share corners with nine BaO12 cuboctahedra, faces with four BaO12 cuboctahedra, and faces with seven TaO6 octahedra. There are a spread of Ba–O bond distances ranging from 2.73–2.98 Å. In the third Ba2+ site, Ba2+ is bonded to twelve O2- atoms to form BaO12 cuboctahedra that share corners with nine BaO12 cuboctahedra, corners with three equivalent TaO6 octahedra, faces with four BaO12 cuboctahedra, and faces with four TaO6 octahedra. The corner-sharing octahedral tilt angles are 24°. There are a spread of Ba–O bond distances ranging from 2.76–3.03 Å. La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are three shorter (2.43 Å) and six longer (2.98 Å) La–O bond lengths. There are three inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with three equivalent BaO12 cuboctahedra, corners with three equivalent TaO6 octahedra, and faces with four BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 6°. There are three shorter (1.88 Å) and three longer (2.21 Å) Ta–O bond lengths. In the second Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with three equivalent TaO6 octahedra and faces with seven BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 2°. There are three shorter (1.93 Å) and three longer (2.15 Å) Ta–O bond lengths. In the third Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TaO6 octahedra and faces with seven BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 2–6°. There are three shorter (1.98 Å) and three longer (2.06 Å) Ta–O bond lengths. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to four Ba2+ and two Ta5+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to three Ba2+ and two Ta5+ atoms. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two Ba2+, two equivalent La3+, and one Ta5+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, one La3+, and one Ta5+ atom.
TaSe3 crystallizes in the monoclinic P2_1/m space group. The structure is two-dimensional and consists of one TaSe3 sheet oriented in the (1, 0, -1) direction. there are three inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded in a 8-coordinate geometry to eight Se+1.67- atoms. There are a spread of Ta–Se bond distances ranging from 2.65–2.79 Å. In the second Ta5+ site, Ta5+ is bonded in a 8-coordinate geometry to eight Se+1.67- atoms. There are a spread of Ta–Se bond distances ranging from 2.65–2.98 Å. In the third Ta5+ site, Ta5+ is bonded in a 8-coordinate geometry to eight Se+1.67- atoms. There are a spread of Ta–Se bond distances ranging from 2.65–2.79 Å. There are nine inequivalent Se+1.67- sites. In the first Se+1.67- site, Se+1.67- is bonded in a 4-coordinate geometry to four Ta5+ atoms. In the second Se+1.67- site, Se+1.67- is bonded in a 2-coordinate geometry to two equivalent Ta5+ atoms. In the third Se+1.67- site, Se+1.67- is bonded in a distorted L-shaped geometry to two equivalent Ta5+ atoms. In the fourth Se+1.67- site, Se+1.67- is bonded in a distorted L-shaped geometry to two equivalent Ta5+ atoms. In the fifth Se+1.67- site, Se+1.67- is bonded in a distorted trigonal non-coplanar geometry to three Ta5+ atoms. In the sixth Se+1.67- site, Se+1.67- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the seventh Se+1.67- site, Se+1.67- is bonded in a 2-coordinate geometry to two equivalent Ta5+ atoms. In the eighth Se+1.67- site, Se+1.67- is bonded in a 4-coordinate geometry to four Ta5+ atoms. In the ninth Se+1.67- site, Se+1.67- is bonded in a 2-coordinate geometry to two equivalent Ta5+ atoms.
Zr3Ta is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Zr is bonded to eight equivalent Zr and four equivalent Ta atoms to form ZrZr8Ta4 cuboctahedra that share corners with four equivalent TaZr12 cuboctahedra, corners with fourteen equivalent ZrZr8Ta4 cuboctahedra, edges with six equivalent TaZr12 cuboctahedra, edges with twelve equivalent ZrZr8Ta4 cuboctahedra, faces with four equivalent TaZr12 cuboctahedra, and faces with sixteen equivalent ZrZr8Ta4 cuboctahedra. There are a spread of Zr–Zr bond distances ranging from 3.07–3.24 Å. There are two shorter (3.13 Å) and two longer (3.15 Å) Zr–Ta bond lengths. Ta is bonded to twelve equivalent Zr atoms to form TaZr12 cuboctahedra that share corners with six equivalent TaZr12 cuboctahedra, corners with twelve equivalent ZrZr8Ta4 cuboctahedra, edges with eighteen equivalent ZrZr8Ta4 cuboctahedra, faces with eight equivalent TaZr12 cuboctahedra, and faces with twelve equivalent ZrZr8Ta4 cuboctahedra.
FeTaO4 is Hydrophilite-derived structured and crystallizes in the orthorhombic Cmm2 space group. The structure is three-dimensional. there are three inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with four equivalent TaO6 octahedra, corners with four equivalent FeO6 octahedra, an edgeedge with one TaO6 octahedra, and an edgeedge with one FeO6 octahedra. The corner-sharing octahedra tilt angles range from 45–53°. There are a spread of Ta–O bond distances ranging from 1.97–2.03 Å. In the second Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with four equivalent TaO6 octahedra, corners with four equivalent FeO6 octahedra, and edges with two FeO6 octahedra. The corner-sharing octahedra tilt angles range from 45–53°. There are a spread of Ta–O bond distances ranging from 1.93–2.06 Å. In the third Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with eight FeO6 octahedra, an edgeedge with one TaO6 octahedra, and an edgeedge with one FeO6 octahedra. The corner-sharing octahedra tilt angles range from 44–54°. There are a spread of Ta–O bond distances ranging from 1.93–2.12 Å. There are three inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with eight TaO6 octahedra, an edgeedge with one TaO6 octahedra, and an edgeedge with one FeO6 octahedra. The corner-sharing octahedra tilt angles range from 44–54°. There are a spread of Fe–O bond distances ranging from 2.00–2.08 Å. In the second Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with four equivalent TaO6 octahedra, corners with four equivalent FeO6 octahedra, and edges with two TaO6 octahedra. The corner-sharing octahedra tilt angles range from 46–53°. There are a spread of Fe–O bond distances ranging from 2.02–2.07 Å. In the third Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with four equivalent TaO6 octahedra, corners with four equivalent FeO6 octahedra, an edgeedge with one TaO6 octahedra, and an edgeedge with one FeO6 octahedra. The corner-sharing octahedra tilt angles range from 47–52°. There are a spread of Fe–O bond distances ranging from 2.01–2.10 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ta5+ and two Fe3+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ta5+ and one Fe3+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ta5+ and one Fe3+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ta5+ and two Fe3+ atoms. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ta5+ and one Fe3+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ta5+ and two Fe3+ atoms.
TaZn3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Ta is bonded to twelve equivalent Zn atoms to form TaZn12 cuboctahedra that share corners with twelve equivalent TaZn12 cuboctahedra, edges with twenty-four equivalent ZnTa4Zn8 cuboctahedra, faces with six equivalent TaZn12 cuboctahedra, and faces with twelve equivalent ZnTa4Zn8 cuboctahedra. All Ta–Zn bond lengths are 2.78 Å. Zn is bonded to four equivalent Ta and eight equivalent Zn atoms to form ZnTa4Zn8 cuboctahedra that share corners with twelve equivalent ZnTa4Zn8 cuboctahedra, edges with eight equivalent TaZn12 cuboctahedra, edges with sixteen equivalent ZnTa4Zn8 cuboctahedra, faces with four equivalent TaZn12 cuboctahedra, and faces with fourteen equivalent ZnTa4Zn8 cuboctahedra. All Zn–Zn bond lengths are 2.78 Å.
TaNb2Mo crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two TaNb2Mo ribbons oriented in the (1, 0, 0) direction. Ta is bonded in a linear geometry to two equivalent Nb atoms. Both Ta–Nb bond lengths are 2.38 Å. Nb is bonded in a linear geometry to one Ta and one Mo atom. The Nb–Mo bond length is 2.32 Å. Mo is bonded in a linear geometry to two equivalent Nb atoms.
TiTaMo2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two TiTaMo2 ribbons oriented in the (1, 0, 0) direction. Ti is bonded in a linear geometry to two equivalent Mo atoms. Both Ti–Mo bond lengths are 2.25 Å. Ta is bonded in a linear geometry to two equivalent Mo atoms. Both Ta–Mo bond lengths are 2.33 Å. Mo is bonded in a linear geometry to one Ti and one Ta atom.
AuTa is Tetraauricupride structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Ta is bonded to eight equivalent Au atoms to form a mixture of distorted corner, edge, and face-sharing TaAu8 cuboctahedra. All Ta–Au bond lengths are 2.93 Å. Au is bonded to eight equivalent Ta atoms to form a mixture of distorted corner, edge, and face-sharing AuTa8 cuboctahedra.