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DOE OSTI2020

Materials Data on PrCrO4 by Materials Project

PrCrO4 is Zircon structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Pr3+ is bonded in a 8-coordinate geometry to eight equivalent O2- atoms. There are four shorter (2.46 Å) and four longer (2.54 Å) Pr–O bond lengths. Cr5+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All Cr–O bond lengths are 1.73 Å. O2- is bonded in a 1-coordinate geometry to two equivalent Pr3+ and one Cr5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PrCrO3 by Materials Project

PrCrO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Pr3+ is bonded to twelve equivalent O2- atoms to form PrO12 cuboctahedra that share corners with twelve equivalent PrO12 cuboctahedra, faces with six equivalent PrO12 cuboctahedra, and faces with eight equivalent CrO6 octahedra. All Pr–O bond lengths are 2.76 Å. Cr3+ is bonded to six equivalent O2- atoms to form CrO6 octahedra that share corners with six equivalent CrO6 octahedra and faces with eight equivalent PrO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Cr–O bond lengths are 1.95 Å. O2- is bonded in a distorted linear geometry to four equivalent Pr3+ and two equivalent Cr3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PrCr2O6 by Materials Project

PrCr2O6 crystallizes in the monoclinic Pc space group. The structure is three-dimensional. Pr3+ is bonded in a 12-coordinate geometry to ten O2- atoms. There are a spread of Pr–O bond distances ranging from 2.43–2.91 Å. There are two inequivalent Cr+4.50+ sites. In the first Cr+4.50+ site, Cr+4.50+ is bonded to six O2- atoms to form corner-sharing CrO6 octahedra. The corner-sharing octahedra tilt angles range from 8–26°. There are a spread of Cr–O bond distances ranging from 1.80–2.03 Å. In the second Cr+4.50+ site, Cr+4.50+ is bonded to six O2- atoms to form corner-sharing CrO6 octahedra. The corner-sharing octahedra tilt angles range from 8–26°. There are a spread of Cr–O bond distances ranging from 1.80–2.06 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Pr3+ and two Cr+4.50+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Pr3+ and two Cr+4.50+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Pr3+ and two Cr+4.50+ atoms. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Pr3+ and two Cr+4.50+ atoms. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Pr3+ and two Cr+4.50+ atoms. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Pr3+ and two Cr+4.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PrCrO3 by Materials Project

PrCrO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Pr3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Pr–O bond distances ranging from 2.38–2.77 Å. Cr3+ is bonded to six O2- atoms to form corner-sharing CrO6 octahedra. The corner-sharing octahedral tilt angles are 28°. There are two shorter (2.02 Å) and four longer (2.03 Å) Cr–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Pr3+ and two equivalent Cr3+ atoms to form distorted corner-sharing OPr2Cr2 tetrahedra. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Pr3+ and two equivalent Cr3+ atoms.

36 MATERIALS SCIENCE↗