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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.

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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Re2NiO8 by Materials Project

Ni(ReO4)2 crystallizes in the trigonal P-3 space group. The structure is two-dimensional and consists of one Ni(ReO4)2 sheet oriented in the (0, 0, 1) direction. Re7+ is bonded to four O2- atoms to form ReO4 tetrahedra that share corners with three equivalent NiO6 octahedra. The corner-sharing octahedral tilt angles are 17°. There is one shorter (1.73 Å) and three longer (1.76 Å) Re–O bond length. Ni2+ is bonded to six equivalent O2- atoms to form NiO6 octahedra that share corners with six equivalent ReO4 tetrahedra. All Ni–O bond lengths are 2.05 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Re7+ atom. In the second O2- site, O2- is bonded in a distorted linear geometry to one Re7+ and one Ni2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ReNiO4 by Materials Project

ReNiO4 is beta Vanadium nitride-derived structured and crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Re6+ is bonded to six O2- atoms to form ReO6 octahedra that share corners with eight equivalent NiO6 octahedra and edges with two equivalent ReO6 octahedra. The corner-sharing octahedra tilt angles range from 42–52°. There are a spread of Re–O bond distances ranging from 1.85–2.01 Å. Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with eight equivalent ReO6 octahedra and edges with two equivalent NiO6 octahedra. The corner-sharing octahedra tilt angles range from 42–52°. There are a spread of Ni–O bond distances ranging from 2.04–2.08 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to two equivalent Re6+ and one Ni2+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Re6+ and one Ni2+ atom. In the third O2- site, O2- is bonded in a distorted T-shaped geometry to one Re6+ and two equivalent Ni2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Re2NiO6 by Materials Project

NiRe2O6 is beta Vanadium nitride-derived structured and crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. Re5+ is bonded to six O2- atoms to form ReO6 octahedra that share corners with four equivalent ReO6 octahedra, corners with four equivalent NiO6 octahedra, an edgeedge with one ReO6 octahedra, and an edgeedge with one NiO6 octahedra. The corner-sharing octahedra tilt angles range from 40–52°. There is four shorter (1.96 Å) and two longer (2.03 Å) Re–O bond length. Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with eight equivalent ReO6 octahedra and edges with two equivalent ReO6 octahedra. The corner-sharing octahedra tilt angles range from 41–52°. There is two shorter (1.89 Å) and four longer (2.06 Å) Ni–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Re5+ and one Ni2+ atom. In the second O2- site, O2- is bonded in a distorted T-shaped geometry to two equivalent Re5+ and one Ni2+ atom.

36 MATERIALS SCIENCE↗