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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on BaCu3O4 by Materials Project

BaCu3O4 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. Ba2+ is bonded to eight equivalent O2- atoms to form distorted face-sharing BaO8 hexagonal bipyramids. All Ba–O bond lengths are 2.85 Å. There are two inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Cu–O bond lengths are 1.98 Å. In the second Cu2+ site, Cu2+ is bonded in a rectangular see-saw-like geometry to four equivalent O2- atoms. All Cu–O bond lengths are 1.93 Å. O2- is bonded to two equivalent Ba2+ and three Cu2+ atoms to form a mixture of distorted face, edge, and corner-sharing OBa2Cu3 trigonal bipyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BaCu3O4 by Materials Project

BaCu3O4 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. Ba2+ is bonded in a distorted linear geometry to two equivalent Cu2+ and eight equivalent O2- atoms. Both Ba–Cu bond lengths are 2.68 Å. All Ba–O bond lengths are 3.31 Å. There are two inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. There is two shorter (1.91 Å) and two longer (1.93 Å) Cu–O bond length. In the second Cu2+ site, Cu2+ is bonded to two equivalent Ba2+ and four equivalent O2- atoms to form distorted corner-sharing CuBa2O4 octahedra. The corner-sharing octahedral tilt angles are 0°. All Cu–O bond lengths are 1.94 Å. O2- is bonded in a distorted T-shaped geometry to two equivalent Ba2+ and three Cu2+ atoms.

36 MATERIALS SCIENCE↗