SEARCH · Search NASA
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.
SmPd is alpha-derived structured and crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Sm is bonded in a 7-coordinate geometry to seven equivalent Pd atoms. There are a spread of Sm–Pd bond distances ranging from 2.99–3.07 Å. Pd is bonded in a 7-coordinate geometry to seven equivalent Sm atoms.
SmPd3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sm is bonded to twelve equivalent Pd atoms to form a mixture of corner and face-sharing SmPd12 cuboctahedra. All Sm–Pd bond lengths are 2.95 Å. Pd is bonded in a distorted square co-planar geometry to four equivalent Sm atoms.
Sm3Pd is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sm is bonded in a distorted square co-planar geometry to four equivalent Pd atoms. All Sm–Pd bond lengths are 3.39 Å. Pd is bonded to twelve equivalent Sm atoms to form a mixture of face and corner-sharing PdSm12 cuboctahedra.
Sm3Pd crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Sm sites. In the first Sm site, Sm is bonded to eight Sm and four equivalent Pd atoms to form distorted SmSm8Pd4 cuboctahedra that share corners with twelve equivalent SmSm8Pd4 cuboctahedra, edges with eight equivalent SmSm8Pd4 cuboctahedra, edges with eight equivalent PdSm12 cuboctahedra, faces with four equivalent PdSm12 cuboctahedra, and faces with ten equivalent SmSm8Pd4 cuboctahedra. There are four shorter (3.16 Å) and four longer (3.54 Å) Sm–Sm bond lengths. All Sm–Pd bond lengths are 3.54 Å. In the second Sm site, Sm is bonded in a square co-planar geometry to eight equivalent Sm and four equivalent Pd atoms. All Sm–Pd bond lengths are 3.16 Å. Pd is bonded to twelve Sm atoms to form PdSm12 cuboctahedra that share corners with four equivalent PdSm12 cuboctahedra, edges with eight equivalent PdSm12 cuboctahedra, edges with sixteen equivalent SmSm8Pd4 cuboctahedra, faces with four equivalent PdSm12 cuboctahedra, and faces with eight equivalent SmSm8Pd4 cuboctahedra.