Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Cu2As2O7”

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.

2 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Cu2As2O7 by Materials Project

Cu2As2O7 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Cu2+ is bonded in a 4-coordinate geometry to four O2- atoms. There is two shorter (1.92 Å) and two longer (2.00 Å) Cu–O bond length. As5+ is bonded to four O2- atoms to form corner-sharing AsO4 tetrahedra. There are a spread of As–O bond distances ranging from 1.70–1.75 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cu2+ and one As5+ atom. In the second O2- site, O2- is bonded in a linear geometry to two equivalent As5+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Cu2+ and one As5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cu2As2O7 by Materials Project

Cu2As2O7 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Cu2+ is bonded to five O2- atoms to form distorted CuO5 trigonal bipyramids that share corners with five equivalent AsO4 tetrahedra and edges with two equivalent CuO5 trigonal bipyramids. There are a spread of Cu–O bond distances ranging from 1.92–2.37 Å. As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share a cornercorner with one AsO4 tetrahedra and corners with five equivalent CuO5 trigonal bipyramids. There are a spread of As–O bond distances ranging from 1.69–1.78 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to two equivalent Cu2+ and one As5+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Cu2+ and one As5+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Cu2+ and one As5+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent As5+ atoms.

36 MATERIALS SCIENCE↗