Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Cs-Ge-Te”

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 Cs2GeTe4 by Materials Project

Cs2GeTe4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Cs1+ is bonded in a 9-coordinate geometry to nine Te+1.50- atoms. There are a spread of Cs–Te bond distances ranging from 3.91–4.23 Å. Ge4+ is bonded in a tetrahedral geometry to four Te+1.50- atoms. There are a spread of Ge–Te bond distances ranging from 2.61–2.71 Å. There are three inequivalent Te+1.50- sites. In the first Te+1.50- site, Te+1.50- is bonded in a 5-coordinate geometry to four equivalent Cs1+ and one Ge4+ atom. In the second Te+1.50- site, Te+1.50- is bonded in a 6-coordinate geometry to four equivalent Cs1+, one Ge4+, and one Te+1.50- atom. The Te–Te bond length is 2.85 Å. In the third Te+1.50- site, Te+1.50- is bonded in a 1-coordinate geometry to six equivalent Cs1+ and one Ge4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs4GeTe6 by Materials Project

Cs4GeTe6 is Magnesium tetraboride-derived structured and crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are four inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to eight Te1- atoms. There are a spread of Cs–Te bond distances ranging from 3.85–4.36 Å. In the second Cs1+ site, Cs1+ is bonded in a 7-coordinate geometry to seven Te1- atoms. There are a spread of Cs–Te bond distances ranging from 3.89–4.29 Å. In the third Cs1+ site, Cs1+ is bonded to eight Te1- atoms to form distorted CsTe8 hexagonal bipyramids that share corners with two equivalent CsTe8 hexagonal bipyramids, corners with two equivalent GeTe4 tetrahedra, an edgeedge with one CsTe8 hexagonal bipyramid, and an edgeedge with one GeTe4 tetrahedra. There are a spread of Cs–Te bond distances ranging from 3.97–4.31 Å. In the fourth Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to eight Te1- atoms. There are a spread of Cs–Te bond distances ranging from 3.82–4.46 Å. Ge2+ is bonded to four Te1- atoms to form GeTe4 tetrahedra that share corners with two equivalent CsTe8 hexagonal bipyramids and an edgeedge with one CsTe8 hexagonal bipyramid. There are a spread of Ge–Te bond distances ranging from 2.58–2.68 Å. There are six inequivalent Te1- sites. In the first Te1- site, Te1- is bonded in a 6-coordinate geometry to four Cs1+, one Ge2+, and one Te1- atom. The Te–Te bond length is 2.80 Å. In the second Te1- site, Te1- is bonded in a 8-coordinate geometry to six Cs1+ and two Te1- atoms. There are one shorter (2.78 Å) and one longer (3.71 Å) Te–Te bond lengths. In the third Te1- site, Te1- is bonded in a 7-coordinate geometry to five Cs1+ and two Te1- atoms. The Te–Te bond length is 3.60 Å. In the fourth Te1- site, Te1- is bonded in a 1-coordinate geometry to six Cs1+ and one Ge2+ atom. In the fifth Te1- site, Te1- is bonded in a 1-coordinate geometry to six Cs1+, one Ge2+, and one Te1- atom. In the sixth Te1- site, Te1- is bonded in a 6-coordinate geometry to four Cs1+, one Ge2+, and one Te1- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs3GeTe3 by Materials Project

Cs3GeTe3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are four inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded to six Te2- atoms to form distorted edge-sharing CsTe6 pentagonal pyramids. There are a spread of Cs–Te bond distances ranging from 3.77–4.07 Å. In the second Cs1+ site, Cs1+ is bonded in a 6-coordinate geometry to six Te2- atoms. There are a spread of Cs–Te bond distances ranging from 3.74–4.29 Å. In the third Cs1+ site, Cs1+ is bonded in a 6-coordinate geometry to six Te2- atoms. There are two shorter (3.94 Å) and four longer (3.95 Å) Cs–Te bond lengths. In the fourth Cs1+ site, Cs1+ is bonded in a 7-coordinate geometry to seven Te2- atoms. There are a spread of Cs–Te bond distances ranging from 3.86–4.35 Å. Ge3+ is bonded in a trigonal non-coplanar geometry to three Te2- atoms. There are a spread of Ge–Te bond distances ranging from 2.62–2.64 Å. There are three inequivalent Te2- sites. In the first Te2- site, Te2- is bonded to six Cs1+ and one Ge3+ atom to form a mixture of distorted corner, edge, and face-sharing TeCs6Ge pentagonal bipyramids. In the second Te2- site, Te2- is bonded in a 8-coordinate geometry to seven Cs1+ and one Ge3+ atom. In the third Te2- site, Te2- is bonded to six Cs1+ and one Ge3+ atom to form a mixture of distorted corner, edge, and face-sharing TeCs6Ge pentagonal bipyramids.

36 MATERIALS SCIENCE↗