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DOE OSTI2020

Materials Data on Ni3(AsO4)2 by Materials Project

Ni3(AsO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Ni2+ sites. In the first Ni2+ site, Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with three NiO6 octahedra, corners with six AsO4 tetrahedra, and edges with two NiO6 octahedra. The corner-sharing octahedra tilt angles range from 52–60°. There are a spread of Ni–O bond distances ranging from 2.00–2.16 Å. In the second Ni2+ site, Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with two NiO6 octahedra, corners with four AsO4 tetrahedra, edges with three NiO6 octahedra, and an edgeedge with one AsO4 tetrahedra. The corner-sharing octahedra tilt angles range from 55–60°. There are a spread of Ni–O bond distances ranging from 2.05–2.24 Å. In the third Ni2+ site, Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with three NiO6 octahedra, corners with four AsO4 tetrahedra, edges with three NiO6 octahedra, and an edgeedge with one AsO4 tetrahedra. The corner-sharing octahedra tilt angles range from 52–55°. There are a spread of Ni–O bond distances ranging from 2.02–2.22 Å. There are two inequivalent As5+ sites. In the first As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with five NiO6 octahedra and edges with two NiO6 octahedra. The corner-sharing octahedra tilt angles range from 53–60°. There are a spread of As–O bond distances ranging from 1.71–1.77 Å. In the second As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with nine NiO6 octahedra. The corner-sharing octahedra tilt angles range from 50–61°. There is three shorter (1.73 Å) and one longer (1.78 Å) As–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Ni2+ and one As5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ni2+ and one As5+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ni2+ and one As5+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal pyramidal geometry to three Ni2+ and one As5+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ni2+ and one As5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Ni2+ and one As5+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ni2+ and one As5+ atom. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ni2+ and one As5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni3(AsO4)2 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni3(AsO4)4 by Materials Project

Ni3(AsO4)4 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of one Ni3(AsO4)4 sheet oriented in the (-1, 0, 2) direction. there are two inequivalent Ni4+ sites. In the first Ni4+ site, Ni4+ is bonded to five O2- atoms to form distorted NiO5 trigonal bipyramids that share corners with five AsO4 tetrahedra. There are a spread of Ni–O bond distances ranging from 1.92–2.26 Å. In the second Ni4+ site, Ni4+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.82 Å) and two longer (1.89 Å) Ni–O bond length. There are two inequivalent As5+ sites. In the first As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with three equivalent NiO5 trigonal bipyramids. There are a spread of As–O bond distances ranging from 1.71–1.75 Å. In the second As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with two equivalent NiO5 trigonal bipyramids. There are a spread of As–O bond distances ranging from 1.70–1.77 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one Ni4+ and one As5+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one Ni4+ and one As5+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one As5+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ni4+ and one As5+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ni4+ and one As5+ atom. In the sixth O2- site, O2- is bonded in a single-bond geometry to one As5+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ni4+ and one As5+ atom. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ni4+ and one As5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ZnNiAsO5 by Materials Project

NiZnAsO5 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. Ni3+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with four equivalent AsO4 tetrahedra and edges with two equivalent NiO6 octahedra. There are a spread of Ni–O bond distances ranging from 1.89–2.09 Å. Zn2+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Zn–O bond distances ranging from 1.88–2.74 Å. As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with four equivalent NiO6 octahedra. The corner-sharing octahedra tilt angles range from 44–61°. There are a spread of As–O bond distances ranging from 1.71–1.74 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Ni3+ and one As5+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one Zn2+ and one As5+ atom. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Ni3+, one Zn2+, and one As5+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Ni3+, two equivalent Zn2+, and one As5+ atom. In the fifth O2- site, O2- is bonded in a trigonal non-coplanar geometry to two equivalent Ni3+ and one Zn2+ atom.

36 MATERIALS SCIENCE↗