Search NASA⌕ Search

SEARCH · Search NASA

Results for “Ge-O”

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.

7 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on GeO2 by Materials Project

GeO2 is Hydrophilite-like structured and crystallizes in the orthorhombic Pbcn space group. The structure is three-dimensional. Ge4+ is bonded to six equivalent O2- atoms to form a mixture of edge and corner-sharing GeO6 octahedra. The corner-sharing octahedral tilt angles are 52°. There is four shorter (1.90 Å) and two longer (1.97 Å) Ge–O bond length. O2- is bonded in a distorted trigonal planar geometry to three equivalent Ge4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on GeO2 by Materials Project

GeO2 crystallizes in the trigonal P3_121 space group. The structure is three-dimensional. Ge4+ is bonded in a distorted see-saw-like geometry to four equivalent O2- atoms. There are two shorter (2.03 Å) and two longer (2.11 Å) Ge–O bond lengths. O2- is bonded in a 3-coordinate geometry to two equivalent Ge4+ and one O2- atom. The O–O bond length is 1.54 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on GeO2 by Materials Project

GeO2 crystallizes in the cubic Pa-3 space group. The structure is three-dimensional. Ge4+ is bonded to six equivalent O2- atoms to form corner-sharing GeO6 octahedra. The corner-sharing octahedral tilt angles are 60°. All Ge–O bond lengths are 1.95 Å. O2- is bonded in a trigonal planar geometry to three equivalent Ge4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on GeO2 by Materials Project

GeO2 is Rutile structured and crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. Ge4+ is bonded to six equivalent O2- atoms to form a mixture of edge and corner-sharing GeO6 octahedra. The corner-sharing octahedral tilt angles are 50°. There is four shorter (1.90 Å) and two longer (1.95 Å) Ge–O bond length. O2- is bonded in a distorted trigonal planar geometry to three equivalent Ge4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on GeO2 by Materials Project

GeO2 is quartz (alpha) structured and crystallizes in the trigonal P3_121 space group. The structure is three-dimensional. Ge4+ is bonded to four equivalent O2- atoms to form corner-sharing GeO4 tetrahedra. There is two shorter (1.76 Å) and two longer (1.77 Å) Ge–O bond length. O2- is bonded in a bent 120 degrees geometry to two equivalent Ge4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on GeO2 by Materials Project

GeO2 is low (alpha) Cristobalite structured and crystallizes in the tetragonal P4_12_12 space group. The structure is three-dimensional. Ge4+ is bonded to four equivalent O2- atoms to form corner-sharing GeO4 tetrahedra. There is two shorter (1.76 Å) and two longer (1.77 Å) Ge–O bond length. O2- is bonded in a bent 120 degrees geometry to two equivalent Ge4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ge2O3 by Materials Project

Ge2O3 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. there are two inequivalent Ge3+ sites. In the first Ge3+ site, Ge3+ is bonded to twelve equivalent O2- atoms to form GeO12 cuboctahedra that share corners with twelve equivalent GeO12 cuboctahedra, faces with six equivalent GeO12 cuboctahedra, and faces with eight equivalent GeO6 octahedra. All Ge–O bond lengths are 2.67 Å. In the second Ge3+ site, Ge3+ is bonded to six equivalent O2- atoms to form GeO6 octahedra that share corners with six equivalent GeO6 octahedra and faces with eight equivalent GeO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Ge–O bond lengths are 1.89 Å. O2- is bonded in a linear geometry to six Ge3+ atoms.

36 MATERIALS SCIENCE↗