SEARCH · Engineering Papers

Results for “KNaTe”

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.

SourceResearch connectionFrom yearThrough year

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

2 records

All sources NASA NTRS DOE OSTI

DOE OSTI2020

Materials Data on KNaTe by Materials Project

KNaTe crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. K1+ is bonded to five equivalent Te2- atoms to form distorted KTe5 trigonal bipyramids that share corners with eight equivalent NaTe4 tetrahedra, corners with eight equivalent KTe5 trigonal bipyramids, edges with six equivalent NaTe4 tetrahedra, and edges with six equivalent KTe5 trigonal bipyramids. There are a spread of K–Te bond distances ranging from 3.56–3.70 Å. Na1+ is bonded to four equivalent Te2- atoms to form NaTe4 tetrahedra that share corners with eight equivalent NaTe4 tetrahedra, corners with eight equivalent KTe5 trigonal bipyramids, edges with two equivalent NaTe4 tetrahedra, and edges with six equivalent KTe5 trigonal bipyramids. There are a spread of Na–Te bond distances ranging from 3.16–3.21 Å. Te2- is bonded in a 9-coordinate geometry to five equivalent K1+ and four equivalent Na1+ atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on KNaTe(HO)6 by Materials Project

KNaTe(HO)6 crystallizes in the trigonal P31c space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to three equivalent H1+ and six O2- atoms. All K–H bond lengths are 2.86 Å. There are three shorter (2.91 Å) and three longer (3.14 Å) K–O bond lengths. Na1+ is bonded in an octahedral geometry to six O2- atoms. There are three shorter (2.43 Å) and three longer (2.57 Å) Na–O bond lengths. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one K1+ and one O2- atom. The H–O bond length is 0.99 Å. Te4+ is bonded in a trigonal non-coplanar geometry to three equivalent O2- atoms. All Te–O bond lengths are 1.89 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, one Na1+, and one Te4+ atom. In the second O2- site, O2- is bonded in a distorted water-like geometry to one K1+, one Na1+, and two H1+ atoms.

36 MATERIALS SCIENCE↗