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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Ba2Pr(CuO2)3 by Materials Project

PrBa2Cu3O6 crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (2.84 Å) and four longer (2.93 Å) Ba–O bond lengths. Pr3+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. All Pr–O bond lengths are 2.51 Å. There are two inequivalent Cu+1.67+ sites. In the first Cu+1.67+ site, Cu+1.67+ is bonded to five O2- atoms to form corner-sharing CuO5 square pyramids. There are four shorter (1.97 Å) and one longer (2.61 Å) Cu–O bond lengths. In the second Cu+1.67+ site, Cu+1.67+ is bonded in a linear geometry to two equivalent O2- atoms. Both Cu–O bond lengths are 1.81 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to two equivalent Ba2+, two equivalent Pr3+, and two equivalent Cu+1.67+ atoms. In the second O2- site, O2- is bonded in a 1-coordinate geometry to four equivalent Ba2+ and two Cu+1.67+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Pr(CuO2)3 by Materials Project

PrBa2Cu3O6 crystallizes in the tetragonal P-4m2 space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (2.79 Å) and four longer (2.81 Å) Ba–O bond lengths. In the second Ba2+ site, Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (2.79 Å) and four longer (2.81 Å) Ba–O bond lengths. Pr3+ is bonded to four equivalent O2- atoms to form corner-sharing PrO4 tetrahedra. All Pr–O bond lengths are 2.29 Å. There are two inequivalent Cu+1.67+ sites. In the first Cu+1.67+ site, Cu+1.67+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.83 Å) and two longer (2.13 Å) Cu–O bond length. In the second Cu+1.67+ site, Cu+1.67+ is bonded in a distorted rectangular see-saw-like geometry to six O2- atoms. There are four shorter (1.92 Å) and two longer (2.76 Å) Cu–O bond lengths. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to four equivalent Ba2+ and two Cu+1.67+ atoms. In the second O2- site, O2- is bonded in a distorted linear geometry to four Ba2+ and two equivalent Cu+1.67+ atoms. In the third O2- site, O2- is bonded to two equivalent Pr3+ and two equivalent Cu+1.67+ atoms to form corner-sharing OPr2Cu2 tetrahedra.

36 MATERIALS SCIENCE↗