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.
TmIr is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Tm is bonded in a body-centered cubic geometry to eight equivalent Ir atoms. All Tm–Ir bond lengths are 2.93 Å. Ir is bonded in a body-centered cubic geometry to eight equivalent Tm atoms.
TmIr2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Tm is bonded in a 12-coordinate geometry to twelve equivalent Ir atoms. All Tm–Ir bond lengths are 3.13 Å. Ir is bonded to six equivalent Tm and six equivalent Ir atoms to form a mixture of face, edge, and corner-sharing IrTm6Ir6 cuboctahedra. All Ir–Ir bond lengths are 2.67 Å.
Tm5Ir3 crystallizes in the tetragonal P4/ncc space group. The structure is three-dimensional. there are two inequivalent Tm sites. In the first Tm site, Tm is bonded to five Ir atoms to form distorted TmIr5 trigonal bipyramids that share corners with four equivalent TmIr4 tetrahedra, corners with eleven equivalent TmIr5 trigonal bipyramids, an edgeedge with one TmIr4 tetrahedra, edges with six equivalent TmIr5 trigonal bipyramids, and faces with two equivalent TmIr5 trigonal bipyramids. There are a spread of Tm–Ir bond distances ranging from 2.86–3.09 Å. In the second Tm site, Tm is bonded to four equivalent Ir atoms to form TmIr4 tetrahedra that share corners with sixteen equivalent TmIr5 trigonal bipyramids, edges with two equivalent TmIr4 tetrahedra, and edges with four equivalent TmIr5 trigonal bipyramids. All Tm–Ir bond lengths are 2.82 Å. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 8-coordinate geometry to eight Tm atoms. In the second Ir site, Ir is bonded in a 8-coordinate geometry to eight equivalent Tm atoms.
Tm5Ir3 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. there are two inequivalent Tm sites. In the first Tm site, Tm is bonded in a 6-coordinate geometry to six equivalent Ir atoms. All Tm–Ir bond lengths are 2.98 Å. In the second Tm site, Tm is bonded in a 5-coordinate geometry to five equivalent Ir atoms. There are a spread of Tm–Ir bond distances ranging from 2.83–3.21 Å. Ir is bonded in a 9-coordinate geometry to nine Tm atoms.