SEARCH · Engineering Papers
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.
GdGe crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Gd is bonded in a 5-coordinate geometry to seven equivalent Ge atoms. There are five shorter (3.02 Å) and two longer (3.25 Å) Gd–Ge bond lengths. Ge is bonded in a 9-coordinate geometry to seven equivalent Gd and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.70 Å.
Gd5Ge4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are three inequivalent Gd sites. In the first Gd site, Gd is bonded in a 7-coordinate geometry to seven Ge atoms. There are a spread of Gd–Ge bond distances ranging from 3.01–3.64 Å. In the second Gd site, Gd is bonded in a 6-coordinate geometry to six Ge atoms. There are a spread of Gd–Ge bond distances ranging from 2.90–3.10 Å. In the third Gd site, Gd is bonded to six Ge atoms to form corner-sharing GdGe6 octahedra. The corner-sharing octahedra tilt angles range from 53–55°. There are a spread of Gd–Ge bond distances ranging from 3.01–3.19 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to eight Gd and one Ge atom. The Ge–Ge bond length is 2.69 Å. In the second Ge site, Ge is bonded in a 8-coordinate geometry to eight Gd atoms. In the third Ge site, Ge is bonded in a 9-coordinate geometry to eight Gd and one Ge atom.