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DOE OSTI2020

Materials Data on V3(PO4)2 by Materials Project

V3(PO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent V2+ sites. In the first V2+ site, V2+ is bonded to six O2- atoms to form VO6 octahedra that share corners with two equivalent VO5 square pyramids, corners with six equivalent PO4 tetrahedra, and edges with two equivalent VO5 square pyramids. There are four shorter (2.21 Å) and two longer (2.22 Å) V–O bond lengths. In the second V2+ site, V2+ is bonded to five O2- atoms to form distorted VO5 square pyramids that share a cornercorner with one VO6 octahedra, corners with three equivalent PO4 tetrahedra, an edgeedge with one VO6 octahedra, an edgeedge with one VO5 square pyramid, and an edgeedge with one PO4 tetrahedra. The corner-sharing octahedral tilt angles are 57°. There are a spread of V–O bond distances ranging from 2.11–2.16 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent VO6 octahedra, corners with three equivalent VO5 square pyramids, and an edgeedge with one VO5 square pyramid. The corner-sharing octahedra tilt angles range from 28–54°. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent 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 3-coordinate geometry to two V2+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted T-shaped geometry to two V2+ and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on V3(PO4)2 by Materials Project

V3(PO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent V2+ sites. In the first 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 2.12–2.74 Å. In the second V2+ site, V2+ is bonded to five O2- atoms to form VO5 square pyramids that share a cornercorner with one VO5 square pyramid and corners with five PO4 tetrahedra. There are a spread of V–O bond distances ranging from 2.07–2.25 Å. In the third V2+ site, V2+ is bonded to five O2- atoms to form distorted VO5 square pyramids that share a cornercorner with one VO5 square pyramid, corners with five PO4 tetrahedra, and edges with two equivalent VO5 square pyramids. There are a spread of V–O bond distances ranging from 2.09–2.24 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four VO5 square pyramids. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with six VO5 square pyramids. There is two shorter (1.55 Å) and two longer (1.56 Å) P–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two V2+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent V2+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two V2+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent V2+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two V2+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent V2+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to two V2+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to two V2+ and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on V3(PO4)2 by Materials Project

V3(PO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent V2+ sites. In the first V2+ site, V2+ is bonded to six O2- atoms to form distorted VO6 octahedra that share corners with four PO4 tetrahedra, corners with four VO5 trigonal bipyramids, an edgeedge with one PO4 tetrahedra, and an edgeedge with one VO5 trigonal bipyramid. There are a spread of V–O bond distances ranging from 2.12–2.33 Å. In the second V2+ site, V2+ is bonded to five O2- atoms to form distorted VO5 trigonal bipyramids that share corners with two equivalent VO6 octahedra, corners with three PO4 tetrahedra, a cornercorner with one VO5 trigonal bipyramid, an edgeedge with one PO4 tetrahedra, and an edgeedge with one VO5 trigonal bipyramid. The corner-sharing octahedra tilt angles range from 42–62°. There are a spread of V–O bond distances ranging from 2.09–2.29 Å. In the third V2+ site, V2+ is bonded to five O2- atoms to form distorted VO5 trigonal bipyramids that share corners with two equivalent VO6 octahedra, corners with five PO4 tetrahedra, a cornercorner with one VO5 trigonal bipyramid, and an edgeedge with one VO6 octahedra. The corner-sharing octahedra tilt angles range from 57–68°. There are a spread of V–O bond distances ranging from 2.11–2.24 Å. There are two 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, corners with three VO5 trigonal bipyramids, an edgeedge with one VO6 octahedra, and an edgeedge with one VO5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 32°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent VO6 octahedra and corners with five VO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 34–61°. There are a spread of P–O bond distances ranging from 1.55–1.57 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent V2+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two V2+ and one P5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two V2+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two 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 distorted trigonal planar geometry to two V2+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to two V2+ and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on V3(PO4)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

Recognition of V3+/V4+/V5+ Multielectron Reactions in Na3V(PO4)2: A Potential High Energy Density Cathode for Sodium-Ion Batteries

Na3V(PO4)2 was reported recently as a novel cathode material with high theoretical energy density for Sodium-ion batteries (SIBs). However, whether V3+/V4+/V5+ multielectron reactions can be realized during the charging process is still an open question. In this work, Na3V(PO4)2 is synthesized by using a solid-state method. Its atomic composition and crystal structure are verified by X-ray diffraction (XRD) and neutron diffraction (ND) joint refinement. The electrochemical performance of Na3V(PO4)2 is evaluated in two different voltage windows, namely 2.5–3.8 and 2.5–4.3 V. 51V solid-state NMR (ssNMR) results disclose the presence of V5+ in Na2-xV(PO4)2 when charging Na3V(PO4)2 to 4.3 V, confirming Na3V(PO4)2 is a potential high energy density cathode through realization of V3+/V4+/V5+ multielectron reactions.

25 ENERGY STORAGE↗
DOE OSTI2020

Materials Data on VFe(PO4)2 by Materials Project

VFe(PO4)2 crystallizes in the trigonal R3 space group. The structure is three-dimensional. there are three inequivalent V3+ sites. In the first V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra. There is three shorter (1.90 Å) and three longer (2.02 Å) V–O bond length. In the second V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra and a faceface with one FeO6 octahedra. There is three shorter (1.93 Å) and three longer (2.04 Å) V–O bond length. In the third V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra. There is three shorter (1.92 Å) and three longer (2.04 Å) V–O bond length. There are three inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to six O2- atoms to form distorted FeO6 octahedra that share corners with six PO4 tetrahedra, a faceface with one VO6 octahedra, and a faceface with one FeO6 octahedra. There are three shorter (2.16 Å) and three longer (2.20 Å) Fe–O bond lengths. In the second Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six PO4 tetrahedra and a faceface with one FeO6 octahedra. There are three shorter (1.95 Å) and three longer (2.10 Å) Fe–O bond lengths. In the third Fe3+ site, Fe3+ is bonded in a 6-coordinate geometry to six O2- atoms. All Fe–O bond lengths are 2.21 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two FeO6 octahedra and corners with three VO6 octahedra. The corner-sharing octahedra tilt angles range from 27–47°. There are a spread of P–O bond distances ranging from 1.52–1.57 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two FeO6 octahedra and corners with three VO6 octahedra. The corner-sharing octahedra tilt angles range from 26–49°. There are a spread of P–O bond distances ranging from 1.53–1.57 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one V3+, one Fe3+, and one P5+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one V3+, one Fe3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to two Fe3+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one V3+, one Fe3+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LiVP2(HO4)2 by Materials Project

LiVP2(HO4)2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 1-coordinate geometry to five O2- atoms. There are a spread of Li–O bond distances ranging from 2.37–2.86 Å. In the second Li1+ site, Li1+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Li–O bond distances ranging from 1.69–2.28 Å. In the third Li1+ site, Li1+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Li–O bond distances ranging from 1.76–2.33 Å. There are four inequivalent V3+ sites. In the first V3+ site, V3+ 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 1.82–2.48 Å. In the second V3+ site, V3+ is bonded in a 2-coordinate geometry to four O2- atoms. There are a spread of V–O bond distances ranging from 1.67–2.46 Å. In the third V3+ site, V3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of V–O bond distances ranging from 1.74–2.49 Å. In the fourth V3+ site, V3+ is bonded to six O2- atoms to form distorted VO6 octahedra that share corners with four PO4 tetrahedra and corners with two equivalent PO4 trigonal pyramids. There are a spread of V–O bond distances ranging from 1.65–2.33 Å. There are six inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form distorted PO4 tetrahedra that share a cornercorner with one VO6 octahedra. The corner-sharing octahedral tilt angles are 21°. There are a spread of P–O bond distances ranging from 1.37–1.85 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form distorted PO4 tetrahedra that share a cornercorner with one VO6 octahedra. The corner-sharing octahedral tilt angles are 25°. There are a spread of P–O bond distances ranging from 1.24–1.75 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form distorted PO4 tetrahedra that share a cornercorner with one VO6 octahedra. The corner-sharing octahedral tilt angles are 37°. There are a spread of P–O bond distances ranging from 1.50–1.71 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form distorted PO4 trigonal pyramids that share a cornercorner with one VO6 octahedra. The corner-sharing octahedral tilt angles are 29°. There are a spread of P–O bond distances ranging from 1.40–1.75 Å. In the fifth P5+ site, P5+ is bonded to four O2- atoms to form distorted PO4 tetrahedra that share a cornercorner with one VO6 octahedra. The corner-sharing octahedral tilt angles are 41°. There are a spread of P–O bond distances ranging from 1.35–1.90 Å. In the sixth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one VO6 octahedra. The corner-sharing octahedral tilt angles are 47°. There are a spread of P–O bond distances ranging from 1.37–1.81 Å. There are six inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a bent 150 degrees geometry to two O2- atoms. There is one shorter (0.98 Å) and one longer (1.49 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.09 Å. In the third H1+ site, H1+ is bonded in a distorted bent 150 degrees geometry to two O2- atoms. There is one shorter (0.96 Å) and one longer (1.38 Å) H–O bond length. In the fourth H1+ site, H1+ is bonded in a distorted single-bond geometry to one O2- atom. The H–O bond length is 1.08 Å. In the fifth H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.51 Å) H–O bond length. In the sixth H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.04 Å) and one longer (1.70 Å) H–O bond length. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one V3+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one P5+, and one H1+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two Li1+, one P5+, and one H1+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one V3+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two Li1+, one P5+, and one H1+ atom. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to two Li1+, one P5+, and one H1+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one V3+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to one P5+ atom. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to one V3+, one P5+, and one H1+ atom. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one P5+, and one H1+ atom. In the eleventh O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one P5+, and one H1+ atom. In the twelfth O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom. In the fourteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one V3+ and one P5+ atom. In the fifteenth O2- site, O2- is bonded in a distorted single-bond geometry to one Li1+ and one P5+ atom. In the sixteenth O2- site, O2- is bonded in a 3-coordinate geometry to one V3+, one P5+, and one H1+ atom. In the seventeenth O2- site, O2- is bonded in a distorted single-bond geometry to one V3+, one P5+, and one H1+ atom. In the eighteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the nineteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom. In the twentieth O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom. In the twenty-first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one V3+ and one P5+ atom. In the twenty-second O2- site, O2- is bonded in a bent 120 degrees geometry to one V3+ and one P5+ atom. In the twenty-third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one V3+ and one P5+ atom. In the twenty-fourth O2- site, O2- is bonded in a distorted T-shaped geometry to one V3+, one P5+, and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li3V(PO4)2 by Materials Project

Li3V(PO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are six 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 2.02–2.10 Å. In the second Li1+ site, Li1+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Li–O bond distances ranging from 1.92–2.06 Å. In the third Li1+ site, Li1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Li–O bond distances ranging from 2.01–2.17 Å. In the fourth 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 1.96–2.37 Å. In the fifth Li1+ site, Li1+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Li–O bond distances ranging from 1.99–2.13 Å. In the sixth Li1+ site, Li1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Li–O bond distances ranging from 2.08–2.24 Å. There are two inequivalent V3+ sites. In the first V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with four PO4 tetrahedra and an edgeedge with one PO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.95–2.16 Å. In the second V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with four PO4 tetrahedra and an edgeedge with one PO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.97–2.18 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 an edgeedge with one VO6 octahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of P–O bond distances ranging from 1.52–1.58 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one VO6 octahedra and an edgeedge with one VO6 octahedra. The corner-sharing octahedral tilt angles are 53°. There are a spread of P–O bond distances ranging from 1.53–1.58 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three VO6 octahedra. The corner-sharing octahedra tilt angles range from 51–67°. There is two shorter (1.54 Å) and two longer (1.56 Å) P–O bond length. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three VO6 octahedra. The corner-sharing octahedra tilt angles range from 41–63°. There is one shorter (1.53 Å) and three longer (1.56 Å) P–O bond length. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one V3+, and one P5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two Li1+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a trigonal planar geometry to two Li1+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one V3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to two Li1+, one V3+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a distorted trigonal pyramidal geometry to two Li1+, one V3+, and one P5+ atom. In the eleventh O2- site, O2- is bonded in a 3-coordinate geometry to two Li1+ and one P5+ atom. In the twelfth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a 4-coordinate geometry to three Li1+ and one P5+ atom. In the fourteenth O2- site, O2- is bonded in a distorted T-shaped geometry to one Li1+, one V3+, and one P5+ atom. In the fifteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one V3+, and one P5+ atom. In the sixteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3V2P2O8F3 by Materials Project

K3V2P2O8F3 crystallizes in the orthorhombic Cmc2_1 space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 7-coordinate geometry to four O2- and three F1- atoms. There are two shorter (2.66 Å) and two longer (2.75 Å) K–O bond lengths. There are one shorter (2.65 Å) and two longer (2.67 Å) K–F bond lengths. In the second K1+ site, K1+ is bonded in a 4-coordinate geometry to four O2- and three F1- atoms. There are two shorter (2.65 Å) and two longer (2.99 Å) K–O bond lengths. There are two shorter (2.61 Å) and one longer (3.18 Å) K–F bond lengths. In the third K1+ site, K1+ is bonded in a 7-coordinate geometry to four O2- and three F1- atoms. There are two shorter (2.68 Å) and two longer (2.87 Å) K–O bond lengths. There are two shorter (2.63 Å) and one longer (2.67 Å) K–F bond lengths. V3+ is bonded to four O2- and two F1- atoms to form VO4F2 octahedra that share a cornercorner with one VO4F2 octahedra and corners with four equivalent PO4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. There are a spread of V–O bond distances ranging from 1.99–2.08 Å. There are one shorter (2.00 Å) and one longer (2.16 Å) V–F bond lengths. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent VO4F2 octahedra. The corner-sharing octahedra tilt angles range from 39–42°. There is one shorter (1.55 Å) and three longer (1.56 Å) P–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one V3+, and one P5+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two K1+, one V3+, and one P5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one V3+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one V3+, and one P5+ atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a 4-coordinate geometry to three K1+ and two equivalent V3+ atoms. In the second F1- site, F1- is bonded in a 4-coordinate geometry to three K1+ and one V3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3V2P2O8F3 by Materials Project

Na3V2(PO4)2F3 crystallizes in the orthorhombic Pnnm space group. The structure is three-dimensional. there are three inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 7-coordinate geometry to four O2- and three F1- atoms. There are two shorter (2.43 Å) and two longer (2.68 Å) Na–O bond lengths. There are two shorter (2.48 Å) and one longer (2.61 Å) Na–F bond lengths. In the second Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four O2- and three F1- atoms. There are two shorter (2.42 Å) and two longer (2.95 Å) Na–O bond lengths. There are two shorter (2.42 Å) and one longer (2.75 Å) Na–F bond lengths. In the third Na1+ site, Na1+ is bonded in a 7-coordinate geometry to four O2- and three F1- atoms. There are two shorter (2.44 Å) and two longer (2.51 Å) Na–O bond lengths. There are one shorter (2.47 Å) and two longer (2.48 Å) Na–F bond lengths. V3+ is bonded to four O2- and two F1- atoms to form VO4F2 octahedra that share a cornercorner with one VO4F2 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. There are a spread of V–O bond distances ranging from 1.99–2.07 Å. Both V–F bond lengths are 2.02 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent VO4F2 octahedra. The corner-sharing octahedra tilt angles range from 43–45°. All P–O bond lengths are 1.55 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent VO4F2 octahedra. The corner-sharing octahedra tilt angles range from 43–44°. There is two shorter (1.54 Å) and two longer (1.55 Å) P–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one V3+, and one P5+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one V3+, and one P5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one V3+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one V3+, and one P5+ atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a 4-coordinate geometry to three Na1+ and one V3+ atom. In the second F1- site, F1- is bonded in a 2-coordinate geometry to three Na1+ and two equivalent V3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li3V2(PO4)3 by Materials Project

Li3V2(PO4)3 crystallizes in the monoclinic Cc space group. The structure is three-dimensional. there are three inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Li–O bond distances ranging from 2.02–2.60 Å. In the second Li1+ site, Li1+ is bonded in a 3-coordinate geometry to four O2- atoms. There are a spread of Li–O bond distances ranging from 2.02–2.50 Å. In the third Li1+ site, Li1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Li–O bond distances ranging from 2.09–2.82 Å. There are two inequivalent V3+ sites. In the first V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.99–2.12 Å. In the second V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.98–2.05 Å. There are three inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four VO6 octahedra. The corner-sharing octahedra tilt angles range from 28–47°. There is two shorter (1.54 Å) and two longer (1.56 Å) P–O bond length. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four VO6 octahedra. The corner-sharing octahedra tilt angles range from 22–48°. There are a spread of P–O bond distances ranging from 1.52–1.56 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four VO6 octahedra. The corner-sharing octahedra tilt angles range from 27–47°. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Li1+, one V3+, and one P5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal pyramidal geometry to two Li1+, one V3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to two Li1+, one V3+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to two Li1+, one V3+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to two Li1+, one V3+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the eleventh O2- site, O2- is bonded in a 3-coordinate geometry to two Li1+, one V3+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one V3+, and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3V2(PO4)3 by Materials Project

K3V2(PO4)3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.68–2.74 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.55–2.79 Å. V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.99–2.22 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent VO6 octahedra. The corner-sharing octahedra tilt angles range from 26–32°. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent VO6 octahedra. The corner-sharing octahedra tilt angles range from 28–31°. There is two shorter (1.55 Å) and two longer (1.56 Å) P–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two K1+, one V3+, and one P5+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three K1+, one V3+, and one P5+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two K1+, one V3+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one V3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one V3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent K1+, one V3+, and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li3V2(PO4)3 by Materials Project

Li3V2(PO4)3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Li–O bond distances ranging from 1.96–2.37 Å. In the second Li1+ site, Li1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Li–O bond distances ranging from 1.95–2.15 Å. In the third Li1+ site, Li1+ is bonded in a 3-coordinate geometry to four O2- atoms. There are a spread of Li–O bond distances ranging from 1.89–2.58 Å. There are two inequivalent V3+ sites. In the first V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.98–2.12 Å. In the second V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.95–2.18 Å. There are three inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four VO6 octahedra. The corner-sharing octahedra tilt angles range from 12–42°. There are a spread of P–O bond distances ranging from 1.51–1.57 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four VO6 octahedra. The corner-sharing octahedra tilt angles range from 30–35°. There is one shorter (1.54 Å) and three longer (1.55 Å) P–O bond length. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four VO6 octahedra. The corner-sharing octahedra tilt angles range from 13–44°. There are a spread of P–O bond distances ranging from 1.51–1.58 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the second O2- site, O2- is bonded in a rectangular see-saw-like geometry to two Li1+, one V3+, and one P5+ atom. In the third O2- site, O2- is bonded in a linear geometry to one V3+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one V3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a linear geometry to one V3+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Li1+, one V3+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one V3+ and one P5+ atom. In the tenth O2- site, O2- is bonded in a distorted T-shaped geometry to one Li1+, one V3+, and one P5+ atom. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to two Li1+, one V3+, and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on V2Cd(P2O7)2 by Materials Project

V2Cd(P2O7)2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent V3+ sites. In the first V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra and edges with two equivalent CdO6 octahedra. There are a spread of V–O bond distances ranging from 1.96–2.11 Å. In the second V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with two equivalent CdO6 octahedra and corners with six PO4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. There are a spread of V–O bond distances ranging from 1.96–2.22 Å. Cd2+ is bonded to six O2- atoms to form distorted CdO6 octahedra that share corners with two equivalent VO6 octahedra, corners with six PO4 tetrahedra, and edges with two equivalent VO6 octahedra. The corner-sharing octahedral tilt angles are 61°. There are a spread of Cd–O bond distances ranging from 2.33–2.67 Å. There are two 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 CdO6 octahedra, corners with three VO6 octahedra, and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 24–59°. There are a spread of P–O bond distances ranging from 1.50–1.59 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent CdO6 octahedra, corners with three VO6 octahedra, and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 31–60°. There are a spread of P–O bond distances ranging from 1.51–1.61 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one V3+, one Cd2+, and one P5+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one V3+, one Cd2+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one V3+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to one V3+, one Cd2+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsVZn(PO3)6 by Materials Project

CsVZn(PO3)6 crystallizes in the triclinic P1 space group. The structure is three-dimensional. Cs1+ is bonded in a 2-coordinate geometry to eight O2- atoms. There are a spread of Cs–O bond distances ranging from 3.11–3.61 Å. V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of V–O bond distances ranging from 2.03–2.08 Å. Zn2+ is bonded to six O2- atoms to form ZnO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 2.05–2.10 Å. There are six 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, a cornercorner with one ZnO6 octahedra, and corners with two PO4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. There are a spread of P–O bond distances ranging from 1.49–1.62 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one VO6 octahedra, a cornercorner with one ZnO6 octahedra, and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 40–48°. There are a spread of P–O bond distances ranging from 1.48–1.62 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one VO6 octahedra, a cornercorner with one ZnO6 octahedra, and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 41–48°. There are a spread of P–O bond distances ranging from 1.49–1.62 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, a cornercorner with one ZnO6 octahedra, and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 45–47°. There are a spread of P–O bond distances ranging from 1.49–1.62 Å. In the fifth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent ZnO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of P–O bond distances ranging from 1.49–1.63 Å. In the sixth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent VO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedral tilt angles are 42°. There are a spread of P–O bond distances ranging from 1.50–1.60 Å. There are eighteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Zn2+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one V3+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Zn2+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one Cs1+, one Zn2+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one Cs1+, one V3+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cs1+, one V3+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cs1+, one Zn2+, and one P5+ atom. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to one Cs1+, one V3+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to one Cs1+, one Zn2+, and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Cs1+, one Zn2+, and one P5+ atom. In the fourteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Cs1+, one V3+, and one P5+ atom. In the fifteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two P5+ atoms. In the sixteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two P5+ atoms. In the seventeenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two P5+ atoms. In the eighteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two P5+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on V2Hg(P2O7)2 by Materials Project

V2Hg(P2O7)2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent V3+ sites. In the first V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.97–2.16 Å. In the second V3+ site, V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.99–2.06 Å. Hg2+ is bonded in a distorted linear geometry to two equivalent O2- atoms. Both Hg–O bond lengths are 2.13 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three VO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 27–56°. There are a spread of P–O bond distances ranging from 1.50–1.61 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three VO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 35–51°. There are a spread of P–O bond distances ranging from 1.51–1.63 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two P5+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one V3+ and one P5+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a trigonal planar geometry to one V3+, one Hg2+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one V3+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li3V2(PO4)3 by Materials Project

Li3V2(PO4)3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are four inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Li–O bond distances ranging from 1.97–2.00 Å. In the second Li1+ site, Li1+ is bonded in a 2-coordinate geometry to four O2- atoms. There are a spread of Li–O bond distances ranging from 1.94–2.61 Å. In the third Li1+ site, Li1+ is bonded in a bent 150 degrees geometry to two equivalent O2- atoms. Both Li–O bond lengths are 1.89 Å. In the fourth Li1+ site, Li1+ is bonded in a distorted linear geometry to two equivalent O2- atoms. Both Li–O bond lengths are 2.19 Å. There are two inequivalent V3+ sites. In the first V3+ site, V3+ is bonded to six O2- atoms to form distorted VO6 octahedra that share corners with four PO4 tetrahedra and an edgeedge with one PO4 tetrahedra. There are a spread of V–O bond distances ranging from 2.02–2.18 Å. In the second V3+ site, V3+ is bonded to five O2- atoms to form VO5 trigonal bipyramids that share corners with five PO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.94–2.05 Å. There are three inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent VO6 octahedra and corners with two equivalent VO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 53–65°. There are a spread of P–O bond distances ranging from 1.53–1.56 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent VO5 trigonal bipyramids and an edgeedge with one VO6 octahedra. There are a spread of P–O bond distances ranging from 1.53–1.58 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 VO5 trigonal bipyramid. The corner-sharing octahedra tilt angles range from 48–52°. There are a spread of P–O bond distances ranging from 1.51–1.59 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one V3+, and one P5+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one V3+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one V3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one V3+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to two Li1+, one V3+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one V3+ and one P5+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one V3+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one V3+ and one P5+ atom. In the eleventh O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one P5+ atom. In the twelfth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one V3+, and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2NbV(PO5)2 by Materials Project

K2NbV(PO5)2 crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.74–3.19 Å. In the second K1+ site, K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.76–3.34 Å. Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent VO6 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. There are a spread of Nb–O bond distances ranging from 1.86–2.18 Å. V3+ is bonded to six O2- atoms to form VO6 octahedra that share corners with two equivalent NbO6 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. There are a spread of V–O bond distances ranging from 1.98–2.10 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent NbO6 octahedra and corners with two equivalent VO6 octahedra. The corner-sharing octahedra tilt angles range from 46–48°. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent NbO6 octahedra and corners with two equivalent VO6 octahedra. The corner-sharing octahedra tilt angles range from 46–50°. There is two shorter (1.55 Å) and two longer (1.57 Å) P–O bond length. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one V3+, and one P5+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two K1+, one V3+, and one P5+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Nb5+, and one V3+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one V3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Nb5+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Nb5+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one V3+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Nb5+, and one V3+ atom. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Nb5+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Nb5+, and one P5+ atom.

36 MATERIALS SCIENCE↗