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DOE OSTI2020

Materials Data on Ba2Y(CuO2)4 by Materials Project

YBa2Cu4O8 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.76–3.12 Å. Y3+ is bonded in a distorted q6 geometry to two equivalent Cu+2.25+ and eight O2- atoms. Both Y–Cu bond lengths are 2.42 Å. There are four shorter (2.56 Å) and four longer (2.57 Å) Y–O bond lengths. There are two inequivalent Cu+2.25+ sites. In the first Cu+2.25+ site, Cu+2.25+ is bonded in a square co-planar geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.87–1.94 Å. In the second Cu+2.25+ site, Cu+2.25+ is bonded in a 5-coordinate geometry to one Y3+ and five O2- atoms. There are a spread of Cu–O bond distances ranging from 1.98–2.07 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Ba2+ and two Cu+2.25+ atoms to form a mixture of distorted edge and corner-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 17°. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+, two equivalent Y3+, and two equivalent Cu+2.25+ atoms. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+, two equivalent Y3+, and two equivalent Cu+2.25+ atoms. In the fourth O2- site, O2- is bonded in a distorted T-shaped geometry to two equivalent Ba2+ and three equivalent Cu+2.25+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Lu(CuO2)3 by Materials Project

LuBa2Cu3O6 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 (2.78 Å) and four longer (2.99 Å) Ba–O bond lengths. Lu3+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. All Lu–O bond lengths are 2.38 Å. There are two inequivalent Cu+1.67+ sites. In the first 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. In the second Cu+1.67+ site, Cu+1.67+ is bonded to five O2- atoms to form distorted corner-sharing CuO5 square pyramids. There are four shorter (1.93 Å) and one longer (2.66 Å) Cu–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, two equivalent Lu3+, and two equivalent Cu+1.67+ atoms. In the second O2- site, O2- is bonded in a 6-coordinate geometry to four equivalent Ba2+ and two Cu+1.67+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Y(CuO2)3 by Materials Project

YBa2Cu3O6 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 (2.91 Å) Ba–O bond lengths. Y3+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. All Y–O bond lengths are 2.43 Å. There are two inequivalent Cu+1.67+ sites. In the first Cu+1.67+ site, Cu+1.67+ is bonded in a distorted rectangular see-saw-like geometry to five O2- atoms. There are four shorter (1.95 Å) and one longer (2.79 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 1.80 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 Y3+, 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 Ba2(CuO2)3 by Materials Project

Ba2Cu3O6 crystallizes in the orthorhombic Fmmm 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 (2.76 Å) and four longer (2.83 Å) Ba–O bond lengths. In the second Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.84–3.04 Å. There are two inequivalent Cu+2.67+ sites. In the first Cu+2.67+ site, Cu+2.67+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Cu–O bond lengths are 1.87 Å. In the second Cu+2.67+ site, Cu+2.67+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.89 Å) and two longer (1.90 Å) Cu–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to three Ba2+ and two Cu+2.67+ atoms. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three Ba2+ and two equivalent Cu+2.67+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li3(CuO2)2 by Materials Project

Li3Cu2O4 crystallizes in the monoclinic C2 space group. The structure is three-dimensional. there are three inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four O2- atoms to form a mixture of distorted edge and corner-sharing LiO4 trigonal pyramids. There are two shorter (1.99 Å) and two longer (2.01 Å) Li–O bond lengths. In the second Li1+ site, Li1+ is bonded to four O2- atoms to form a mixture of distorted edge and corner-sharing LiO4 trigonal pyramids. There are two shorter (2.00 Å) and two longer (2.04 Å) Li–O bond lengths. In the third Li1+ site, Li1+ is bonded to four O2- atoms to form distorted edge-sharing LiO4 tetrahedra. There is two shorter (1.88 Å) and two longer (2.01 Å) Li–O bond length. There are two inequivalent Cu+2.50+ sites. In the first Cu+2.50+ site, Cu+2.50+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There is two shorter (1.86 Å) and two longer (1.87 Å) Cu–O bond length. In the second Cu+2.50+ site, Cu+2.50+ is bonded in a square co-planar geometry to four O2- atoms. All Cu–O bond lengths are 1.94 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to three Li1+ and two Cu+2.50+ atoms to form a mixture of edge and corner-sharing OLi3Cu2 trigonal bipyramids. In the second O2- site, O2- is bonded to three Li1+ and two Cu+2.50+ atoms to form a mixture of distorted edge and corner-sharing OLi3Cu2 trigonal bipyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li3(CuO2)2 by Materials Project

Li3Cu2O4 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There are a spread of Li–O bond distances ranging from 1.91–1.98 Å. In the second Li1+ site, Li1+ is bonded to six O2- atoms to form edge-sharing LiO6 octahedra. There are four shorter (2.08 Å) and two longer (2.54 Å) Li–O bond lengths. Cu+2.50+ is bonded in a square co-planar geometry to four O2- atoms. All Cu–O bond lengths are 1.90 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to four Li1+ and two equivalent Cu+2.50+ atoms. In the second O2- site, O2- is bonded to three Li1+ and two equivalent Cu+2.50+ atoms to form a mixture of edge and corner-sharing OLi3Cu2 square pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na8(CuO2)5 by Materials Project

Na8Cu5O10 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are five inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 3-coordinate geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.31–2.82 Å. In the second Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.33–2.60 Å. In the third Na1+ site, Na1+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.35–2.46 Å. In the fourth Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.31–2.70 Å. In the fifth Na1+ site, Na1+ is bonded in a distorted trigonal bipyramidal geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.37–2.42 Å. There are three inequivalent Cu+2.40+ sites. In the first Cu+2.40+ site, Cu+2.40+ is bonded in a square co-planar geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.87–1.90 Å. In the second Cu+2.40+ site, Cu+2.40+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. All Cu–O bond lengths are 1.93 Å. In the third Cu+2.40+ site, Cu+2.40+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There is two shorter (1.95 Å) and two longer (1.96 Å) Cu–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded to four Na1+ and two equivalent Cu+2.40+ atoms to form ONa4Cu2 octahedra that share corners with four equivalent ONa3Cu2 trigonal bipyramids, edges with two equivalent ONa4Cu2 octahedra, and edges with two equivalent ONa3Cu2 trigonal bipyramids. In the second O2- site, O2- is bonded to four Na1+ and two Cu+2.40+ atoms to form distorted ONa4Cu2 octahedra that share corners with four ONa3Cu2 trigonal bipyramids, edges with two ONa4Cu2 octahedra, and edges with two ONa3Cu2 trigonal bipyramids. In the third O2- site, O2- is bonded to three Na1+ and two Cu+2.40+ atoms to form ONa3Cu2 trigonal bipyramids that share corners with four ONa4Cu2 octahedra, a cornercorner with one ONa3Cu2 trigonal bipyramid, an edgeedge with one ONa4Cu2 octahedra, and edges with two equivalent ONa3Cu2 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 1–50°. In the fourth O2- site, O2- is bonded in a 7-coordinate geometry to five Na1+ and two equivalent Cu+2.40+ atoms. In the fifth O2- site, O2- is bonded in a 6-coordinate geometry to four Na1+ and two Cu+2.40+ atoms. In the sixth O2- site, O2- is bonded to three Na1+ and two Cu+2.40+ atoms to form distorted ONa3Cu2 trigonal bipyramids that share corners with two equivalent ONa4Cu2 octahedra, corners with three ONa3Cu2 trigonal bipyramids, edges with two ONa4Cu2 octahedra, and edges with two equivalent ONa3Cu2 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 2–57°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3(CuO2)2 by Materials Project

Na3Cu2O4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.32–2.94 Å. In the second Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.29–2.68 Å. In the third Na1+ site, Na1+ is bonded to five O2- atoms to form distorted edge-sharing NaO5 trigonal bipyramids. There are a spread of Na–O bond distances ranging from 2.33–2.44 Å. There are two inequivalent Cu+2.50+ sites. In the first Cu+2.50+ site, Cu+2.50+ is bonded in a square co-planar geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.87–1.91 Å. In the second Cu+2.50+ site, Cu+2.50+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.90–1.92 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to three Na1+ and two Cu+2.50+ atoms to form a mixture of distorted corner and edge-sharing ONa3Cu2 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 5–50°. In the second O2- site, O2- is bonded in a 6-coordinate geometry to four Na1+ and two Cu+2.50+ atoms. In the third O2- site, O2- is bonded to four Na1+ and two Cu+2.50+ atoms to form distorted ONa4Cu2 trigonal bipyramids that share a cornercorner with one ONa4Cu2 octahedra, corners with two equivalent ONa4Cu2 trigonal bipyramids, edges with three equivalent ONa4Cu2 octahedra, and edges with three equivalent ONa3Cu2 trigonal bipyramids. The corner-sharing octahedral tilt angles are 1°. In the fourth O2- site, O2- is bonded to four Na1+ and two Cu+2.50+ atoms to form a mixture of distorted corner and edge-sharing ONa4Cu2 octahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Nd(CuO2)3 by Materials Project

NdBa2Cu3O6 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 (2.83 Å) and four longer (2.94 Å) Ba–O bond lengths. Nd3+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. All Nd–O bond lengths are 2.50 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 distorted corner-sharing CuO5 square pyramids. There are four shorter (1.96 Å) and one longer (2.65 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 1.80 Å. There are two 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 6-coordinate geometry to two equivalent Ba2+, two equivalent Nd3+, and two equivalent Cu+1.67+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2(CuO2)3 by Materials Project

Ba2Cu3O6 crystallizes in the monoclinic P2/m space group. The structure is three-dimensional. there are four inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ba–O bond distances ranging from 2.67–2.77 Å. In the second Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ba–O bond distances ranging from 2.66–2.81 Å. In the third Ba2+ site, Ba2+ is bonded in a distorted hexagonal bipyramidal geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.69–2.99 Å. In the fourth Ba2+ site, Ba2+ is bonded in a 4-coordinate geometry to four O2- atoms. All Ba–O bond lengths are 2.62 Å. There are four inequivalent Cu+2.67+ sites. In the first Cu+2.67+ site, Cu+2.67+ is bonded in a square co-planar geometry to four O2- atoms. All Cu–O bond lengths are 1.88 Å. In the second Cu+2.67+ site, Cu+2.67+ is bonded in a square co-planar geometry to four O2- atoms. There is one shorter (1.87 Å) and three longer (1.88 Å) Cu–O bond length. In the third Cu+2.67+ site, Cu+2.67+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.87 Å) and two longer (1.89 Å) Cu–O bond length. In the fourth Cu+2.67+ site, Cu+2.67+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.87 Å) and two longer (1.88 Å) Cu–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two Ba2+ and two Cu+2.67+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two Ba2+ and two Cu+2.67+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two Ba2+ and two equivalent Cu+2.67+ atoms. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to two Ba2+ and two Cu+2.67+ atoms. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to two Ba2+ and two equivalent Cu+2.67+ atoms. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to two Ba2+ and two Cu+2.67+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Ho(CuO2)4 by Materials Project

HoBa2Cu4O8 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.76–3.02 Å. Ho3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are four shorter (2.40 Å) and four longer (2.41 Å) Ho–O bond lengths. There are two inequivalent Cu+2.25+ sites. In the first Cu+2.25+ site, Cu+2.25+ is bonded to five O2- atoms to form corner-sharing CuO5 square pyramids. There are four shorter (1.96 Å) and one longer (2.32 Å) Cu–O bond lengths. In the second Cu+2.25+ site, Cu+2.25+ is bonded in a square co-planar geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.85–1.95 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted T-shaped geometry to two equivalent Ba2+ and three equivalent Cu+2.25+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, two equivalent Ho3+, and two equivalent Cu+2.25+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, two equivalent Ho3+, and two equivalent Cu+2.25+ atoms. In the fourth O2- site, O2- is bonded to four equivalent Ba2+ and two Cu+2.25+ atoms to form a mixture of distorted edge and corner-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 11°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Er(CuO2)4 by Materials Project

ErBa2Cu4O8 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.76–3.02 Å. Er3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are four shorter (2.39 Å) and four longer (2.40 Å) Er–O bond lengths. There are two inequivalent Cu+2.25+ sites. In the first Cu+2.25+ site, Cu+2.25+ is bonded to five O2- atoms to form corner-sharing CuO5 square pyramids. There are a spread of Cu–O bond distances ranging from 1.95–2.32 Å. In the second Cu+2.25+ site, Cu+2.25+ is bonded in a square co-planar geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.85–1.95 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted T-shaped geometry to two equivalent Ba2+ and three equivalent Cu+2.25+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, two equivalent Er3+, and two equivalent Cu+2.25+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, two equivalent Er3+, and two equivalent Cu+2.25+ atoms. In the fourth O2- site, O2- is bonded to four equivalent Ba2+ and two Cu+2.25+ atoms to form a mixture of distorted corner and edge-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 11°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Dy(CuO2)4 by Materials Project

DyBa2Cu4O8 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.76–3.01 Å. Dy3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are four shorter (2.41 Å) and four longer (2.42 Å) Dy–O bond lengths. There are two inequivalent Cu+2.25+ sites. In the first Cu+2.25+ site, Cu+2.25+ is bonded to five O2- atoms to form corner-sharing CuO5 square pyramids. There are a spread of Cu–O bond distances ranging from 1.96–2.31 Å. In the second Cu+2.25+ site, Cu+2.25+ is bonded in a square co-planar geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.85–1.96 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted T-shaped geometry to two equivalent Ba2+ and three equivalent Cu+2.25+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, two equivalent Dy3+, and two equivalent Cu+2.25+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, two equivalent Dy3+, and two equivalent Cu+2.25+ atoms. In the fourth O2- site, O2- is bonded to four equivalent Ba2+ and two Cu+2.25+ atoms to form a mixture of distorted edge and corner-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 11°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Tm(CuO2)4 by Materials Project

TmBa2Cu4O8 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.75–3.03 Å. Tm3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are four shorter (2.38 Å) and four longer (2.39 Å) Tm–O bond lengths. There are two inequivalent Cu+2.25+ sites. In the first Cu+2.25+ site, Cu+2.25+ is bonded to five O2- atoms to form corner-sharing CuO5 square pyramids. There are a spread of Cu–O bond distances ranging from 1.95–2.33 Å. In the second Cu+2.25+ site, Cu+2.25+ is bonded in a square co-planar geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.85–1.95 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted T-shaped geometry to two equivalent Ba2+ and three equivalent Cu+2.25+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, two equivalent Tm3+, and two equivalent Cu+2.25+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, two equivalent Tm3+, and two equivalent Cu+2.25+ atoms. In the fourth O2- site, O2- is bonded to four equivalent Ba2+ and two Cu+2.25+ atoms to form a mixture of distorted corner and edge-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 11°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Y(CuO2)4 by Materials Project

YBa2Cu4O8 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.69–3.05 Å. Y3+ is bonded in a linear geometry to two equivalent O2- atoms. Both Y–O bond lengths are 2.18 Å. There are two inequivalent Cu+2.25+ sites. In the first Cu+2.25+ site, Cu+2.25+ is bonded to five O2- atoms to form corner-sharing CuO5 trigonal bipyramids. There are a spread of Cu–O bond distances ranging from 1.99–2.16 Å. In the second Cu+2.25+ site, Cu+2.25+ is bonded in a square co-planar geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.87–1.91 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Ba2+ and two Cu+2.25+ atoms to form distorted OBa4Cu2 octahedra that share corners with four equivalent OBa4Cu2 octahedra, corners with four equivalent OBa2YCu2 trigonal bipyramids, edges with four equivalent OBa4Cu2 octahedra, and faces with two equivalent OBa2YCu2 trigonal bipyramids. The corner-sharing octahedral tilt angles are 9°. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Cu+2.25+ atoms. In the third O2- site, O2- is bonded to two equivalent Ba2+, one Y3+, and two equivalent Cu+2.25+ atoms to form distorted OBa2YCu2 trigonal bipyramids that share corners with four equivalent OBa4Cu2 octahedra, corners with five equivalent OBa2YCu2 trigonal bipyramids, and faces with two equivalent OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 57°. In the fourth O2- site, O2- is bonded in a distorted T-shaped geometry to two equivalent Ba2+ and three equivalent Cu+2.25+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Y(CuO2)4 by Materials Project

YBa2Cu4O8 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. Ba2+ is bonded in a distorted q6 geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.77–3.01 Å. Y3+ is bonded in a body-centered cubic geometry to eight O2- atoms. All Y–O bond lengths are 2.42 Å. There are two inequivalent Cu+2.25+ sites. In the first Cu+2.25+ site, Cu+2.25+ is bonded to five O2- atoms to form corner-sharing CuO5 square pyramids. There are a spread of Cu–O bond distances ranging from 1.96–2.31 Å. In the second Cu+2.25+ site, Cu+2.25+ is bonded in a square co-planar geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.85–1.96 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Ba2+ and two Cu+2.25+ atoms to form a mixture of distorted edge and corner-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 11°. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, two equivalent Y3+, and two equivalent Cu+2.25+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, two equivalent Y3+, and two equivalent Cu+2.25+ atoms. In the fourth O2- site, O2- is bonded in a distorted T-shaped geometry to two equivalent Ba2+ and three equivalent Cu+2.25+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3(CuO2)2 by Materials Project

Na3Cu2O4 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to four O2- atoms to form distorted NaO4 tetrahedra that share a cornercorner with one NaO6 octahedra, corners with two equivalent NaO4 tetrahedra, edges with two equivalent NaO6 octahedra, and edges with two equivalent NaO4 tetrahedra. The corner-sharing octahedral tilt angles are 29°. There are a spread of Na–O bond distances ranging from 2.26–2.35 Å. In the second Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with two equivalent NaO4 tetrahedra, edges with two equivalent NaO6 octahedra, and edges with four equivalent NaO4 tetrahedra. There are four shorter (2.34 Å) and two longer (2.84 Å) Na–O bond lengths. Cu+2.50+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.92 Å) and two longer (1.93 Å) Cu–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to four Na1+ and two equivalent Cu+2.50+ atoms. In the second O2- site, O2- is bonded to three Na1+ and two equivalent Cu+2.50+ atoms to form a mixture of edge and corner-sharing ONa3Cu2 square pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg(CuO2)2 by Materials Project

MgCu2O4 is Spinel structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Mg2+ is bonded to four equivalent O2- atoms to form MgO4 tetrahedra that share corners with twelve equivalent CuO6 octahedra. The corner-sharing octahedral tilt angles are 58°. All Mg–O bond lengths are 1.98 Å. Cu3+ is bonded to six equivalent O2- atoms to form CuO6 octahedra that share corners with six equivalent MgO4 tetrahedra and edges with six equivalent CuO6 octahedra. All Cu–O bond lengths are 2.01 Å. O2- is bonded to one Mg2+ and three equivalent Cu3+ atoms to form a mixture of distorted edge and corner-sharing OMgCu3 trigonal pyramids.

36 MATERIALS SCIENCE↗