Search NASA⌕ Search

SEARCH · Search NASA

Results for “Cr-N”

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.

At least 19 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on CrN by Materials Project

CrN is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Cr3+ is bonded to six equivalent N3- atoms to form a mixture of edge and corner-sharing CrN6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Cr–N bond lengths are 2.08 Å. N3- is bonded to six equivalent Cr3+ atoms to form a mixture of edge and corner-sharing NCr6 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cr2N by Materials Project

Cr2N is beta Vanadium nitride structured and crystallizes in the trigonal P-31m space group. The structure is three-dimensional. Cr is bonded in a distorted T-shaped geometry to three N atoms. There is one shorter (1.92 Å) and two longer (1.94 Å) Cr–N bond length. There are two inequivalent N sites. In the first N site, N is bonded to six equivalent Cr atoms to form corner-sharing NCr6 octahedra. The corner-sharing octahedral tilt angles are 48°. In the second N site, N is bonded to six equivalent Cr atoms to form a mixture of edge and corner-sharing NCr6 octahedra. The corner-sharing octahedral tilt angles are 48°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrN2 by Materials Project

CrN2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Cr6+ is bonded in a 6-coordinate geometry to six N3- atoms. There are a spread of Cr–N bond distances ranging from 1.65–2.27 Å. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a T-shaped geometry to three equivalent Cr6+ atoms. In the second N3- site, N3- is bonded in a distorted single-bond geometry to three equivalent Cr6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrN by Materials Project

CrN is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Cr3+ is bonded in a body-centered cubic geometry to eight equivalent N3- atoms. All Cr–N bond lengths are 2.18 Å. N3- is bonded in a body-centered cubic geometry to eight equivalent Cr3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cr3N2 by Materials Project

Cr3N2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Cr2+ sites. In the first Cr2+ site, Cr2+ is bonded in a linear geometry to two equivalent N3- atoms. Both Cr–N bond lengths are 1.94 Å. In the second Cr2+ site, Cr2+ is bonded to five equivalent N3- atoms to form a mixture of corner and edge-sharing CrN5 square pyramids. There are four shorter (2.03 Å) and one longer (2.06 Å) Cr–N bond lengths. N3- is bonded to six Cr2+ atoms to form a mixture of corner and edge-sharing NCr6 octahedra. The corner-sharing octahedra tilt angles range from 0–10°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrN2 by Materials Project

CrN2 is beta Tridymite structured and crystallizes in the orthorhombic Ama2 space group. The structure is three-dimensional. Cr6+ is bonded to four N3- atoms to form corner-sharing CrN4 tetrahedra. There are a spread of Cr–N bond distances ranging from 1.72–1.74 Å. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded in a linear geometry to two equivalent Cr6+ atoms. In the second N3- site, N3- is bonded in a linear geometry to two equivalent Cr6+ atoms. In the third N3- site, N3- is bonded in a linear geometry to two equivalent Cr6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrN2 by Materials Project

CrN2 is beta Vanadium nitride-like structured and crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. Cr6+ is bonded to six equivalent N3- atoms to form a mixture of corner and edge-sharing CrN6 octahedra. The corner-sharing octahedral tilt angles are 45°. There is four shorter (1.87 Å) and two longer (1.97 Å) Cr–N bond length. N3- is bonded in a distorted T-shaped geometry to three equivalent Cr6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cr3N4 by Materials Project

Cr3N4 crystallizes in the cubic I-43d space group. The structure is three-dimensional. Cr4+ is bonded to four equivalent N3- atoms to form corner-sharing CrN4 tetrahedra. All Cr–N bond lengths are 1.84 Å. N3- is bonded in a trigonal planar geometry to three equivalent Cr4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cr3N4 by Materials Project

Cr3N4 is Corundum-like structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are three inequivalent Cr4+ sites. In the first Cr4+ site, Cr4+ is bonded to six N3- atoms to form CrN6 octahedra that share corners with four equivalent CrN6 octahedra, corners with two equivalent CrN4 tetrahedra, edges with four CrN6 octahedra, and edges with two equivalent CrN4 tetrahedra. The corner-sharing octahedra tilt angles range from 51–55°. There are a spread of Cr–N bond distances ranging from 2.00–2.06 Å. In the second Cr4+ site, Cr4+ is bonded to six N3- atoms to form CrN6 octahedra that share corners with eight CrN6 octahedra, corners with four equivalent CrN4 tetrahedra, edges with two equivalent CrN6 octahedra, and an edgeedge with one CrN4 tetrahedra. The corner-sharing octahedra tilt angles range from 47–55°. There are a spread of Cr–N bond distances ranging from 2.03–2.10 Å. In the third Cr4+ site, Cr4+ is bonded to four N3- atoms to form a mixture of edge and corner-sharing CrN4 tetrahedra. The corner-sharing octahedra tilt angles range from 57–62°. There are a spread of Cr–N bond distances ranging from 1.76–1.78 Å. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded to four Cr4+ atoms to form distorted corner-sharing NCr4 trigonal pyramids. In the second N3- site, N3- is bonded in a rectangular see-saw-like geometry to four Cr4+ atoms. In the third N3- site, N3- is bonded in a rectangular see-saw-like geometry to four Cr4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cr3N4 by Materials Project

Cr3N4 is Corundum-like structured and crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are three inequivalent Cr4+ sites. In the first Cr4+ site, Cr4+ is bonded to six N3- atoms to form a mixture of corner, edge, and face-sharing CrN6 octahedra. The corner-sharing octahedra tilt angles range from 43–49°. There are a spread of Cr–N bond distances ranging from 1.90–2.04 Å. In the second Cr4+ site, Cr4+ is bonded to six N3- atoms to form a mixture of corner, edge, and face-sharing CrN6 octahedra. The corner-sharing octahedra tilt angles range from 43–49°. There are a spread of Cr–N bond distances ranging from 1.91–2.04 Å. In the third Cr4+ site, Cr4+ is bonded to six N3- atoms to form a mixture of corner, edge, and face-sharing CrN6 octahedra. The corner-sharing octahedra tilt angles range from 43–49°. There are a spread of Cr–N bond distances ranging from 1.90–2.04 Å. There are four inequivalent N3- sites. In the first N3- site, N3- is bonded to four Cr4+ atoms to form NCr4 trigonal pyramids that share corners with two equivalent NCr6 pentagonal pyramids, corners with eight NCr4 trigonal pyramids, edges with three equivalent NCr6 pentagonal pyramids, and edges with two equivalent NCr4 trigonal pyramids. In the second N3- site, N3- is bonded to four Cr4+ atoms to form NCr4 trigonal pyramids that share corners with two equivalent NCr6 pentagonal pyramids, corners with eight NCr4 trigonal pyramids, edges with three equivalent NCr6 pentagonal pyramids, and edges with two equivalent NCr4 trigonal pyramids. In the third N3- site, N3- is bonded to four Cr4+ atoms to form NCr4 trigonal pyramids that share corners with two equivalent NCr6 pentagonal pyramids, corners with eight NCr4 trigonal pyramids, edges with three equivalent NCr6 pentagonal pyramids, and edges with two equivalent NCr4 trigonal pyramids. In the fourth N3- site, N3- is bonded to six Cr4+ atoms to form distorted NCr6 pentagonal pyramids that share corners with six NCr4 trigonal pyramids, edges with nine NCr4 trigonal pyramids, and faces with two equivalent NCr6 pentagonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cr3N4 by Materials Project

Cr3N4 crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Cr4+ is bonded to six N3- atoms to form a mixture of edge and corner-sharing CrN6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Cr–N bond lengths are 1.98 Å. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a square co-planar geometry to four equivalent Cr4+ atoms. In the second N3- site, N3- is bonded to six equivalent Cr4+ atoms to form corner-sharing NCr6 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrN2 by Materials Project

CrN2 is high (beta) Cristobalite structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Cr6+ is bonded to four equivalent N3- atoms to form corner-sharing CrN4 tetrahedra. All Cr–N bond lengths are 1.73 Å. N3- is bonded in a linear geometry to two equivalent Cr6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cr3N4 by Materials Project

Cr3N4 is Hausmannite structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. there are two inequivalent Cr4+ sites. In the first Cr4+ site, Cr4+ is bonded to four equivalent N3- atoms to form corner-sharing CrN4 tetrahedra. The corner-sharing octahedral tilt angles are 56°. All Cr–N bond lengths are 1.82 Å. In the second Cr4+ site, Cr4+ is bonded to six equivalent N3- atoms to form CrN6 octahedra that share corners with six equivalent CrN4 tetrahedra and edges with six equivalent CrN6 octahedra. All Cr–N bond lengths are 2.02 Å. N3- is bonded in a distorted rectangular see-saw-like geometry to four Cr4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrN2 by Materials Project

CrN2 is Silicon Disuphide structured and crystallizes in the orthorhombic Ibam space group. The structure is one-dimensional and consists of two CrN2 ribbons oriented in the (0, 1, 0) direction. Cr6+ is bonded in a 4-coordinate geometry to four equivalent N3- atoms. All Cr–N bond lengths are 1.75 Å. N3- is bonded in an L-shaped geometry to two equivalent Cr6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cr3N2 by Materials Project

Cr3N2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Cr2+ sites. In the first Cr2+ site, Cr2+ is bonded to four equivalent N3- atoms to form distorted CrN4 tetrahedra that share corners with six equivalent CrN6 octahedra, corners with six equivalent CrN4 tetrahedra, edges with three equivalent CrN6 octahedra, and edges with three equivalent CrN4 tetrahedra. The corner-sharing octahedra tilt angles range from 24–51°. There are three shorter (1.87 Å) and one longer (2.34 Å) Cr–N bond lengths. In the second Cr2+ site, Cr2+ is bonded to six equivalent N3- atoms to form CrN6 octahedra that share corners with twelve equivalent CrN4 tetrahedra, edges with six equivalent CrN6 octahedra, and edges with six equivalent CrN4 tetrahedra. There are two shorter (2.30 Å) and four longer (2.35 Å) Cr–N bond lengths. N3- is bonded in a 3-coordinate geometry to seven Cr2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrN2 by Materials Project

CrN2 crystallizes in the trigonal P3_2 space group. The structure is three-dimensional. Cr6+ is bonded in a 8-coordinate geometry to eight N3- atoms. There are a spread of Cr–N bond distances ranging from 2.06–2.44 Å. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a 4-coordinate geometry to four equivalent Cr6+ and one N3- atom. The N–N bond length is 1.33 Å. In the second N3- site, N3- is bonded in a 4-coordinate geometry to four equivalent Cr6+ and one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrN2 by Materials Project

CrN2 is quartz (alpha)-like structured and crystallizes in the monoclinic Cc space group. The structure is three-dimensional. there are two inequivalent Cr6+ sites. In the first Cr6+ site, Cr6+ is bonded to four N3- atoms to form corner-sharing CrN4 tetrahedra. There are a spread of Cr–N bond distances ranging from 1.72–1.76 Å. In the second Cr6+ site, Cr6+ is bonded to four N3- atoms to form corner-sharing CrN4 tetrahedra. There are a spread of Cr–N bond distances ranging from 1.72–1.74 Å. There are four inequivalent N3- sites. In the first N3- site, N3- is bonded in a bent 150 degrees geometry to two Cr6+ atoms. In the second N3- site, N3- is bonded in a bent 120 degrees geometry to two equivalent Cr6+ atoms. In the third N3- site, N3- is bonded in a bent 150 degrees geometry to two equivalent Cr6+ atoms. In the fourth N3- site, N3- is bonded in a bent 150 degrees geometry to two Cr6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrN2 by Materials Project

CrN2 crystallizes in the monoclinic P2 space group. The structure is three-dimensional. there are two inequivalent Cr6+ sites. In the first Cr6+ site, Cr6+ is bonded to four N3- atoms to form corner-sharing CrN4 tetrahedra. There are a spread of Cr–N bond distances ranging from 1.65–1.83 Å. In the second Cr6+ site, Cr6+ is bonded to four N3- atoms to form corner-sharing CrN4 tetrahedra. There are a spread of Cr–N bond distances ranging from 1.73–1.82 Å. There are five inequivalent N3- sites. In the first N3- site, N3- is bonded in a bent 150 degrees geometry to two Cr6+ atoms. In the second N3- site, N3- is bonded in a bent 150 degrees geometry to two equivalent Cr6+ atoms. In the third N3- site, N3- is bonded in a water-like geometry to two Cr6+ atoms. In the fourth N3- site, N3- is bonded in a bent 150 degrees geometry to two equivalent Cr6+ atoms. In the fifth N3- site, N3- is bonded in a bent 150 degrees geometry to two Cr6+ atoms.

36 MATERIALS SCIENCE↗