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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on V2P2O7 by Materials Project

V2P2O7 crystallizes in the tetragonal P4_1 space group. The structure is three-dimensional. there are four inequivalent V2+ sites. In the first V2+ site, V2+ is bonded to six O2- atoms to form distorted VO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of V–O bond distances ranging from 2.10–2.34 Å. In the second V2+ site, V2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of V–O bond distances ranging from 2.17–2.45 Å. In the third V2+ site, V2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of V–O bond distances ranging from 2.12–2.66 Å. In the fourth V2+ site, V2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of V–O bond distances ranging from 2.14–2.42 Å. There are four inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one VO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. There are a spread of P–O bond distances ranging from 1.53–1.62 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent VO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 49–66°. There are a spread of P–O bond distances ranging from 1.51–1.61 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent VO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 29–68°. There are a spread of P–O bond distances ranging from 1.50–1.63 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one VO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedral tilt angles are 63°. There are a spread of P–O bond distances ranging from 1.49–1.60 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two V2+ and one P5+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two V2+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted tetrahedral geometry to three V2+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one V2+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to two V2+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to two V2+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to two V2+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to three V2+ and one P5+ atom. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two V2+ and one P5+ atom. In the eleventh O2- site, O2- is bonded in a 4-coordinate geometry to three V2+ and one P5+ atom. In the twelfth O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the thirteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one V2+ and one P5+ atom. In the fourteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one V2+ and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on V2P2O7 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 LiV2(PO4)3 by Materials Project

LiV2(PO4)3 crystallizes in the triclinic P-1 space group. The structure is one-dimensional and consists of two LiPO5 clusters and one V2P2O7 ribbon oriented in the (0, 1, 0) direction. In each LiPO5 cluster, Li1+ is bonded in a 2-coordinate geometry to one P5+ and two O2- atoms. The Li–P bond length is 2.00 Å. There is one shorter (1.67 Å) and one longer (1.78 Å) Li–O bond length. P5+ is bonded in a 2-coordinate geometry to one Li1+ and four O2- atoms. There are a spread of P–O bond distances ranging from 1.25–2.27 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one P5+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one P5+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to one Li1+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to one P5+ atom. In the V2P2O7 ribbon, there are two inequivalent V4+ sites. In the first V4+ site, V4+ is bonded in a 2-coordinate geometry to three O2- atoms. There are a spread of V–O bond distances ranging from 1.49–2.12 Å. In the second V4+ site, V4+ is bonded in a distorted bent 150 degrees geometry to three O2- atoms. There are a spread of V–O bond distances ranging from 1.18–2.59 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded in a distorted L-shaped geometry to three O2- atoms. There are a spread of P–O bond distances ranging from 1.32–2.44 Å. In the second P5+ site, P5+ is bonded in a 2-coordinate geometry to three O2- atoms. There are a spread of P–O bond distances ranging from 1.41–1.69 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one V4+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one V4+ and one P5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one V4+, one P5+, and one O2- atom. The O–O bond length is 1.90 Å. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one V4+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one V4+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted water-like geometry to one V4+ and one P5+ atom.

36 MATERIALS SCIENCE↗