Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “TC”

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.

At least 811 records · Page 45
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on TcCl4 by Materials Project

TcCl4 crystallizes in the orthorhombic Pbca space group. The structure is one-dimensional and consists of four TcCl4 ribbons oriented in the (1, 0, 0) direction. Tc4+ is bonded to six Cl1- atoms to form edge-sharing TcCl6 octahedra. There are a spread of Tc–Cl bond distances ranging from 2.26–2.51 Å. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Tc4+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Tc4+ atom. In the third Cl1- site, Cl1- is bonded in a water-like geometry to two equivalent Tc4+ atoms. In the fourth Cl1- site, Cl1- is bonded in a water-like geometry to two equivalent Tc4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcP4 by Materials Project

TcP4 is Hausmannite-like structured and crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. Tc4+ is bonded to six P1- atoms to form TcP6 octahedra that share corners with two equivalent TcP6 octahedra, corners with fourteen PTc2P2 tetrahedra, and an edgeedge with one TcP6 octahedra. The corner-sharing octahedral tilt angles are 56°. There are a spread of Tc–P bond distances ranging from 2.35–2.55 Å. There are four inequivalent P1- sites. In the first P1- site, P1- is bonded to two equivalent Tc4+ and two P1- atoms to form distorted PTc2P2 tetrahedra that share corners with three equivalent TcP6 octahedra, corners with eleven PTcP3 tetrahedra, and an edgeedge with one PTc2P2 tetrahedra. The corner-sharing octahedra tilt angles range from 64–73°. There are one shorter (2.20 Å) and one longer (2.23 Å) P–P bond lengths. In the second P1- site, P1- is bonded to two equivalent Tc4+ and two P1- atoms to form distorted PTc2P2 tetrahedra that share corners with three equivalent TcP6 octahedra and corners with thirteen PTc2P2 tetrahedra. The corner-sharing octahedra tilt angles range from 53–59°. The P–P bond length is 2.27 Å. In the third P1- site, P1- is bonded to one Tc4+ and three P1- atoms to form distorted PTcP3 tetrahedra that share corners with four equivalent TcP6 octahedra and corners with ten PTc2P2 tetrahedra. The corner-sharing octahedra tilt angles range from 56–76°. There are one shorter (2.19 Å) and one longer (2.21 Å) P–P bond lengths. In the fourth P1- site, P1- is bonded to one Tc4+ and three P1- atoms to form distorted PTcP3 tetrahedra that share corners with four equivalent TcP6 octahedra and corners with ten PTc2P2 tetrahedra. The corner-sharing octahedra tilt angles range from 48–72°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcP3 by Materials Project

TcP3 is Hausmannite-like structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Tc1+ is bonded to six P+0.33- atoms to form TcP6 octahedra that share corners with four equivalent TcP6 octahedra, corners with six PTc3P tetrahedra, and edges with two equivalent TcP6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are a spread of Tc–P bond distances ranging from 2.36–2.47 Å. There are three inequivalent P+0.33- sites. In the first P+0.33- site, P+0.33- is bonded in a distorted rectangular see-saw-like geometry to one Tc1+ and three P+0.33- atoms. There are two shorter (2.21 Å) and one longer (2.22 Å) P–P bond lengths. In the second P+0.33- site, P+0.33- is bonded to three equivalent Tc1+ and one P+0.33- atom to form PTc3P tetrahedra that share corners with two equivalent TcP6 octahedra, corners with ten PTc2P2 tetrahedra, and an edgeedge with one PTc2P2 tetrahedra. The corner-sharing octahedral tilt angles are 64°. The P–P bond length is 2.24 Å. In the third P+0.33- site, P+0.33- is bonded to two equivalent Tc1+ and two P+0.33- atoms to form distorted PTc2P2 tetrahedra that share corners with four equivalent TcP6 octahedra, corners with six PTc2P2 tetrahedra, and an edgeedge with one PTc3P tetrahedra. The corner-sharing octahedra tilt angles range from 50–74°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcO2 by Materials Project

TcO2 is beta Vanadium nitride-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Tc4+ is bonded to six O2- atoms to form a mixture of corner and edge-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 40–50°. There are a spread of Tc–O bond distances ranging from 1.95–2.04 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to three equivalent Tc4+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to three equivalent Tc4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mn2TcO4 by Materials Project

TcMn2O4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Tc4+ is bonded to six O2- atoms to form TcO6 octahedra that share corners with six equivalent MnO4 tetrahedra, edges with two equivalent TcO6 octahedra, and edges with four equivalent MnO6 octahedra. There are two shorter (2.04 Å) and four longer (2.08 Å) Tc–O bond lengths. There are two inequivalent Mn2+ sites. In the first Mn2+ site, Mn2+ is bonded to four O2- atoms to form MnO4 tetrahedra that share corners with six equivalent TcO6 octahedra and corners with six equivalent MnO6 octahedra. The corner-sharing octahedra tilt angles range from 57–60°. There are two shorter (2.05 Å) and two longer (2.11 Å) Mn–O bond lengths. In the second Mn2+ site, Mn2+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six equivalent MnO4 tetrahedra, edges with two equivalent MnO6 octahedra, and edges with four equivalent TcO6 octahedra. There are four shorter (2.15 Å) and two longer (2.28 Å) Mn–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a rectangular see-saw-like geometry to two equivalent Tc4+ and two Mn2+ atoms. In the second O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Tc4+ and three Mn2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg2TcO4 by Materials Project

Mg2TcO4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. there are two inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with six equivalent MgO6 octahedra and corners with six equivalent TcO6 octahedra. The corner-sharing octahedra tilt angles range from 57–59°. There are two shorter (1.99 Å) and two longer (2.04 Å) Mg–O bond lengths. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six equivalent MgO4 tetrahedra, edges with two equivalent MgO6 octahedra, and edges with four equivalent TcO6 octahedra. There are four shorter (2.09 Å) and two longer (2.13 Å) Mg–O bond lengths. Tc4+ is bonded to six O2- atoms to form TcO6 octahedra that share corners with six equivalent MgO4 tetrahedra, edges with two equivalent TcO6 octahedra, and edges with four equivalent MgO6 octahedra. There are two shorter (2.03 Å) and four longer (2.07 Å) Tc–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two Mg2+ and two equivalent Tc4+ atoms to form a mixture of distorted edge and corner-sharing OMg2Tc2 trigonal pyramids. In the second O2- site, O2- is bonded to three Mg2+ and one Tc4+ atom to form a mixture of distorted edge and corner-sharing OMg3Tc trigonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Co2TcO4 by Materials Project

TcCo2O4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Tc4+ is bonded to six O2- atoms to form TcO6 octahedra that share corners with six equivalent CoO4 tetrahedra, edges with two equivalent TcO6 octahedra, and edges with four equivalent CoO6 octahedra. There are two shorter (2.02 Å) and four longer (2.07 Å) Tc–O bond lengths. There are two inequivalent Co2+ sites. In the first Co2+ site, Co2+ is bonded to four O2- atoms to form CoO4 tetrahedra that share corners with six equivalent TcO6 octahedra and corners with six equivalent CoO6 octahedra. The corner-sharing octahedra tilt angles range from 53–63°. There is two shorter (1.97 Å) and two longer (1.99 Å) Co–O bond length. In the second Co2+ site, Co2+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with six equivalent CoO4 tetrahedra, edges with two equivalent CoO6 octahedra, and edges with four equivalent TcO6 octahedra. There are four shorter (2.06 Å) and two longer (2.22 Å) Co–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a rectangular see-saw-like geometry to two equivalent Tc4+ and two Co2+ atoms. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Tc4+ and three Co2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Er2Tc2O7 by Materials Project

Er2Tc2O7 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Er3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are two shorter (2.22 Å) and six longer (2.45 Å) Er–O bond lengths. Tc4+ is bonded to six equivalent O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedral tilt angles are 54°. All Tc–O bond lengths are 2.04 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Er3+ atoms to form OEr4 tetrahedra that share corners with sixteen OEr4 tetrahedra and edges with six equivalent OEr2Tc2 tetrahedra. In the second O2- site, O2- is bonded to two equivalent Er3+ and two equivalent Tc4+ atoms to form a mixture of distorted corner and edge-sharing OEr2Tc2 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm2Tc2O7 by Materials Project

Sm2Tc2O7 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Sm3+ is bonded in a distorted body-centered cubic geometry to eight O2- atoms. There are two shorter (2.26 Å) and six longer (2.53 Å) Sm–O bond lengths. Tc4+ is bonded to six equivalent O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedral tilt angles are 51°. All Tc–O bond lengths are 2.05 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Sm3+ and two equivalent Tc4+ atoms to form a mixture of distorted edge and corner-sharing OSm2Tc2 tetrahedra. In the second O2- site, O2- is bonded to four equivalent Sm3+ atoms to form a mixture of edge and corner-sharing OSm4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy2Tc2O7 by Materials Project

Dy2Tc2O7 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Dy3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are two shorter (2.23 Å) and six longer (2.47 Å) Dy–O bond lengths. Tc4+ is bonded to six equivalent O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedral tilt angles are 53°. All Tc–O bond lengths are 2.04 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Dy3+ and two equivalent Tc4+ atoms to form a mixture of distorted corner and edge-sharing ODy2Tc2 tetrahedra. In the second O2- site, O2- is bonded to four equivalent Dy3+ atoms to form a mixture of corner and edge-sharing ODy4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcSO6F by Materials Project

TcSO6F crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of one TcSO6F sheet oriented in the (1, 0, 0) direction. Tc7+ is bonded in a 3-coordinate geometry to six O2- atoms. There are a spread of Tc–O bond distances ranging from 1.70–2.34 Å. S6+ is bonded in a tetrahedral geometry to three O2- and one F1- atom. All S–O bond lengths are 1.46 Å. The S–F bond length is 1.57 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Tc7+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Tc7+ and one S6+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one Tc7+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one Tc7+ and one S6+ atom. In the fifth O2- site, O2- is bonded in a single-bond geometry to one Tc7+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to one Tc7+ and one S6+ atom. F1- is bonded in a single-bond geometry to one S6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcN by Materials Project

TcN is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Tc3+ is bonded in a body-centered cubic geometry to eight equivalent N3- atoms. All Tc–N bond lengths are 2.32 Å. N3- is bonded in a body-centered cubic geometry to eight equivalent Tc3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcN by Materials Project

TcN is Zincblende, Sphalerite structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Tc3+ is bonded to four equivalent N3- atoms to form corner-sharing TcN4 tetrahedra. All Tc–N bond lengths are 1.99 Å. N3- is bonded to four equivalent Tc3+ atoms to form corner-sharing NTc4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcN by Materials Project

TcN is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Tc3+ is bonded to six equivalent N3- atoms to form a mixture of edge and corner-sharing TcN6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Tc–N bond lengths are 2.16 Å. N3- is bonded to six equivalent Tc3+ atoms to form a mixture of edge and corner-sharing NTc6 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcB by Materials Project

TcB is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Tc3- is bonded in a body-centered cubic geometry to eight equivalent B3+ atoms. All Tc–B bond lengths are 2.37 Å. B3+ is bonded in a body-centered cubic geometry to eight equivalent Tc3- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcB by Materials Project

TcB is Zincblende, Sphalerite structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Tc3- is bonded to four equivalent B3+ atoms to form corner-sharing TcB4 tetrahedra. All Tc–B bond lengths are 2.05 Å. B3+ is bonded to four equivalent Tc3- atoms to form corner-sharing BTc4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcB by Materials Project

TcB is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Tc3- is bonded to six equivalent B3+ atoms to form a mixture of corner and edge-sharing TcB6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Tc–B bond lengths are 2.20 Å. B3+ is bonded to six equivalent Tc3- atoms to form a mixture of corner and edge-sharing BTc6 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcB by Materials Project

TcB is Tungsten Carbide structured and crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Tc3- is bonded to six equivalent B3+ atoms to form a mixture of distorted corner, edge, and face-sharing TcB6 pentagonal pyramids. All Tc–B bond lengths are 2.22 Å. B3+ is bonded to six equivalent Tc3- atoms to form a mixture of distorted corner, edge, and face-sharing BTc6 pentagonal pyramids.

36 MATERIALS SCIENCE↗