Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Cl-K-Ta”

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.

3 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on K2Ta3Cl9 by Materials Project

K2Ta3Cl9 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. K is bonded in a 6-coordinate geometry to six Cl atoms. There are a spread of K–Cl bond distances ranging from 3.09–3.67 Å. There are two inequivalent Ta sites. In the first Ta site, Ta is bonded to five Cl atoms to form distorted corner-sharing TaCl5 square pyramids. There are a spread of Ta–Cl bond distances ranging from 2.47–2.59 Å. In the second Ta site, Ta is bonded to five Cl atoms to form distorted corner-sharing TaCl5 square pyramids. There are a spread of Ta–Cl bond distances ranging from 2.47–2.64 Å. There are six inequivalent Cl sites. In the first Cl site, Cl is bonded in a 2-coordinate geometry to two equivalent K and two equivalent Ta atoms. In the second Cl site, Cl is bonded to three equivalent K and one Ta atom to form a mixture of edge and corner-sharing ClK3Ta tetrahedra. In the third Cl site, Cl is bonded in a trigonal planar geometry to two equivalent K and one Ta atom. In the fourth Cl site, Cl is bonded in a 3-coordinate geometry to one K and two Ta atoms. In the fifth Cl site, Cl is bonded in a 2-coordinate geometry to two equivalent Ta atoms. In the sixth Cl site, Cl is bonded in a 2-coordinate geometry to two Ta atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2TaCl6 by Materials Project

K2TaCl6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. K1+ is bonded to twelve equivalent Cl1- atoms to form KCl12 cuboctahedra that share corners with twelve equivalent KCl12 cuboctahedra, faces with six equivalent KCl12 cuboctahedra, and faces with four equivalent TaCl6 octahedra. All K–Cl bond lengths are 3.58 Å. Ta4+ is bonded to six equivalent Cl1- atoms to form TaCl6 octahedra that share faces with eight equivalent KCl12 cuboctahedra. All Ta–Cl bond lengths are 2.42 Å. Cl1- is bonded in a distorted single-bond geometry to four equivalent K1+ and one Ta4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3TaCl6 by Materials Project

K3TaCl6 is (Cubic) Perovskite-like structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to twelve equivalent Cl1- atoms to form KCl12 cuboctahedra that share corners with twelve equivalent KCl12 cuboctahedra, faces with six equivalent KCl12 cuboctahedra, faces with four equivalent KCl6 octahedra, and faces with four equivalent TaCl6 octahedra. All K–Cl bond lengths are 3.85 Å. In the second K1+ site, K1+ is bonded to six equivalent Cl1- atoms to form KCl6 octahedra that share corners with six equivalent TaCl6 octahedra and faces with eight equivalent KCl12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All K–Cl bond lengths are 2.96 Å. Ta3+ is bonded to six equivalent Cl1- atoms to form TaCl6 octahedra that share corners with six equivalent KCl6 octahedra and faces with eight equivalent KCl12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Ta–Cl bond lengths are 2.47 Å. Cl1- is bonded in a distorted linear geometry to five K1+ and one Ta3+ atom.

36 MATERIALS SCIENCE↗