Search NASA⌕ Search

SEARCH · Search NASA

Results for “VPt3”

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.

Materials Data on VPt3 by Materials Project

Pt3V is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. V2+ is bonded to twelve Pt+0.67- atoms to form VPt12 cuboctahedra that share corners with four equivalent VPt12 cuboctahedra, corners with eight equivalent PtV4Pt8 cuboctahedra, edges with eight equivalent VPt12 cuboctahedra, edges with sixteen equivalent PtV4Pt8 cuboctahedra, faces with four equivalent VPt12 cuboctahedra, and faces with fourteen PtV4Pt8 cuboctahedra. There are four shorter (2.75 Å) and eight longer (2.78 Å) V–Pt bond lengths. There are two inequivalent Pt+0.67- sites. In the first Pt+0.67- site, Pt+0.67- is bonded to four equivalent V2+ and eight Pt+0.67- atoms to form distorted PtV4Pt8 cuboctahedra that share corners with twelve equivalent PtV4Pt8 cuboctahedra, edges with eight equivalent VPt12 cuboctahedra, edges with sixteen PtV4Pt8 cuboctahedra, faces with four equivalent VPt12 cuboctahedra, and faces with fourteen PtV4Pt8 cuboctahedra. There are four shorter (2.75 Å) and four longer (2.78 Å) Pt–Pt bond lengths. In the second Pt+0.67- site, Pt+0.67- is bonded to four equivalent V2+ and eight equivalent Pt+0.67- atoms to form distorted PtV4Pt8 cuboctahedra that share corners with four equivalent PtV4Pt8 cuboctahedra, corners with eight equivalent VPt12 cuboctahedra, edges with twenty-four PtV4Pt8 cuboctahedra, faces with six equivalent VPt12 cuboctahedra, and faces with twelve PtV4Pt8 cuboctahedra.

36 MATERIALS SCIENCE↗

Materials Data on VPt3 by Materials Project

Pt3V is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. V2+ is bonded to twelve equivalent Pt+0.67- atoms to form VPt12 cuboctahedra that share corners with twelve equivalent VPt12 cuboctahedra, edges with twenty-four equivalent PtV4Pt8 cuboctahedra, faces with six equivalent VPt12 cuboctahedra, and faces with twelve equivalent PtV4Pt8 cuboctahedra. All V–Pt bond lengths are 2.78 Å. Pt+0.67- is bonded to four equivalent V2+ and eight equivalent Pt+0.67- atoms to form distorted PtV4Pt8 cuboctahedra that share corners with twelve equivalent PtV4Pt8 cuboctahedra, edges with eight equivalent VPt12 cuboctahedra, edges with sixteen equivalent PtV4Pt8 cuboctahedra, faces with four equivalent VPt12 cuboctahedra, and faces with fourteen equivalent PtV4Pt8 cuboctahedra. All Pt–Pt bond lengths are 2.78 Å.

36 MATERIALS SCIENCE↗

Materials Data on VPt3 by Materials Project

Pt3V crystallizes in the trigonal R-3m space group. The structure is three-dimensional. V2+ is bonded in a distorted hexagonal planar geometry to six equivalent Pt+0.67- atoms. All V–Pt bond lengths are 2.64 Å. There are four inequivalent Pt+0.67- sites. In the first Pt+0.67- site, Pt+0.67- is bonded in a 12-coordinate geometry to three equivalent V2+ and three equivalent Pt+0.67- atoms. All Pt–Pt bond lengths are 2.92 Å. In the second Pt+0.67- site, Pt+0.67- is bonded to twelve Pt+0.67- atoms to form a mixture of edge, face, and corner-sharing PtPt12 cuboctahedra. All Pt–Pt bond lengths are 2.77 Å. In the third Pt+0.67- site, Pt+0.67- is bonded in a 12-coordinate geometry to three equivalent V2+ and three equivalent Pt+0.67- atoms. All Pt–V bond lengths are 2.64 Å. All Pt–Pt bond lengths are 2.92 Å. In the fourth Pt+0.67- site, Pt+0.67- is bonded to sixteen Pt+0.67- atoms to form a mixture of edge, face, and corner-sharing PtPt16 cuboctahedra. There are a spread of Pt–Pt bond distances ranging from 2.77–5.54 Å.

36 MATERIALS SCIENCE↗