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.
TbGa3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Tb is bonded to twelve equivalent Ga atoms to form a mixture of corner and face-sharing TbGa12 cuboctahedra. All Tb–Ga bond lengths are 3.03 Å. Ga is bonded in a distorted square co-planar geometry to four equivalent Tb atoms.
TbGa3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Tb is bonded to twelve equivalent Ga atoms to form a mixture of distorted corner and face-sharing TbGa12 cuboctahedra. There are six shorter (3.05 Å) and six longer (3.16 Å) Tb–Ga bond lengths. Ga is bonded in a 10-coordinate geometry to four equivalent Tb and six equivalent Ga atoms. All Ga–Ga bond lengths are 2.80 Å.
TbGa3(BO3)4 is Calcite-derived structured and crystallizes in the trigonal R32 space group. The structure is three-dimensional. Tb3+ is bonded to six equivalent O2- atoms to form distorted TbO6 pentagonal pyramids that share corners with six equivalent GaO6 octahedra. The corner-sharing octahedral tilt angles are 59°. All Tb–O bond lengths are 2.35 Å. Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with two equivalent TbO6 pentagonal pyramids and edges with two equivalent GaO6 octahedra. There are a spread of Ga–O bond distances ranging from 1.96–2.03 Å. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. All B–O bond lengths are 1.38 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All B–O bond lengths are 1.39 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Ga3+ and one B3+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Tb3+, one Ga3+, and one B3+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Ga3+ and one B3+ atom.