Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “IrN2”

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.

5 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on IrN2 by Materials Project

IrN2 is Marcasite structured and crystallizes in the orthorhombic Pnnm space group. The structure is three-dimensional. Ir4+ is bonded to six equivalent N2- atoms to form IrN6 octahedra that share corners with eight equivalent IrN6 octahedra, corners with six equivalent NIr3N tetrahedra, and edges with two equivalent IrN6 octahedra. The corner-sharing octahedral tilt angles are 67°. There are two shorter (2.08 Å) and four longer (2.11 Å) Ir–N bond lengths. N2- is bonded to three equivalent Ir4+ and one N2- atom to form distorted NIr3N tetrahedra that share corners with three equivalent IrN6 octahedra, corners with thirteen equivalent NIr3N tetrahedra, and an edgeedge with one NIr3N tetrahedra. The corner-sharing octahedra tilt angles range from 64–66°. The N–N bond length is 1.38 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on IrN2 by Materials Project

IrN2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ir4+ is bonded to six N2- atoms to form IrN6 octahedra that share corners with eight equivalent IrN6 octahedra, corners with six NIr3N tetrahedra, and edges with two equivalent IrN6 octahedra. The corner-sharing octahedra tilt angles range from 65–69°. There are a spread of Ir–N bond distances ranging from 2.05–2.13 Å. There are two inequivalent N2- sites. In the first N2- site, N2- is bonded to three equivalent Ir4+ and one N2- atom to form distorted NIr3N tetrahedra that share corners with three equivalent IrN6 octahedra, corners with thirteen NIr3N tetrahedra, and an edgeedge with one NIr3N tetrahedra. The corner-sharing octahedra tilt angles range from 67–70°. The N–N bond length is 1.43 Å. In the second N2- site, N2- is bonded to three equivalent Ir4+ and one N2- atom to form NIr3N tetrahedra that share corners with three equivalent IrN6 octahedra, corners with thirteen NIr3N tetrahedra, and an edgeedge with one NIr3N tetrahedra. The corner-sharing octahedra tilt angles range from 64–66°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on IrN2 by Materials Project

IrN2 is Corundum-like structured and crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Ir4+ is bonded to six equivalent N2- atoms to form distorted edge-sharing IrN6 pentagonal pyramids. All Ir–N bond lengths are 2.18 Å. N2- is bonded in a distorted rectangular see-saw-like geometry to three equivalent Ir4+ and one N2- atom. The N–N bond length is 1.26 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on IrN2 by Materials Project

IrN2 is Corundum-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ir4+ is bonded to six equivalent N2- atoms to form distorted edge-sharing IrN6 pentagonal pyramids. All Ir–N bond lengths are 2.18 Å. N2- is bonded in a distorted rectangular see-saw-like geometry to three equivalent Ir4+ and one N2- atom. The N–N bond length is 1.25 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on IrN2 by Materials Project

IrN2 crystallizes in the cubic Pa-3 space group. The structure is three-dimensional. Ir4+ is bonded to six equivalent N2- atoms to form IrN6 octahedra that share corners with twelve equivalent IrN6 octahedra and corners with six equivalent NIr3N tetrahedra. The corner-sharing octahedral tilt angles are 71°. All Ir–N bond lengths are 2.11 Å. N2- is bonded to three equivalent Ir4+ and one N2- atom to form NIr3N tetrahedra that share corners with three equivalent IrN6 octahedra and corners with fifteen equivalent NIr3N tetrahedra. The corner-sharing octahedral tilt angles are 70°. The N–N bond length is 1.39 Å.

36 MATERIALS SCIENCE↗