cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17188/1302781
title: Materials Data on Li7Fe3Co(PO4)6 by Materials Project

description: Li7Fe3Co(PO4)6 crystallizes in the trigonal R3 space group. The structure is three-dimensional. there are three 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 2.10–2.18 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 2.04–2.28 Å. In the third Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are three shorter (2.13 Å) and three longer (2.74 Å) Li–O bond lengths. There are three inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six PO4 tetrahedra. There are three shorter (2.00 Å) and three longer (2.11 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. There are three shorter (1.98 Å) and three longer (2.12 Å) Fe–O bond lengths. In the third Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six PO4 tetrahedra. There are three shorter (1.99 Å) and three longer (2.09 Å) Fe–O bond lengths. Co2+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with six PO4 tetrahedra. There are three shorter (2.01 Å) and three longer (2.14 Å) Co–O bond lengths. 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 CoO6 octahedra and corners with three FeO6 octahedra. The corner-sharing octahedra tilt angles range from 24–43°. There are a spread of P–O bond distances ranging from 1.53–1.58 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CoO6 octahedra and corners with three FeO6 octahedra. The corner-sharing octahedra tilt angles range from 32–44°. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Co2+, and one P5+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, 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 distorted see-saw-like geometry to two equivalent Li1+, one Fe3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a rectangular see-saw-like geometry to two Li1+, one Fe3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Li1+, one Co2+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to two Li1+, one Fe3+, and one P5+ atom.
DOI: 10.17188/1302783
title: Materials Data on Li3TiV4O8 (SG:12) by Materials Project

description: 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
DOI: 10.17188/1302784
title: Materials Data on Li2MnFeO4 by Materials Project

description: Li2MnFeO4 is Caswellsilverite-derived structured and crystallizes in the tetragonal I-4m2 space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with two equivalent FeO6 octahedra, corners with four equivalent LiO6 octahedra, edges with four equivalent LiO6 octahedra, edges with four equivalent MnO6 octahedra, and edges with four equivalent FeO6 octahedra. The corner-sharing octahedra tilt angles range from 0–9°. There are four shorter (2.08 Å) and two longer (2.31 Å) Li–O bond lengths. In the second Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with two equivalent MnO6 octahedra, corners with four equivalent LiO6 octahedra, edges with four equivalent LiO6 octahedra, edges with four equivalent MnO6 octahedra, and edges with four equivalent FeO6 octahedra. The corner-sharing octahedra tilt angles range from 0–8°. There are four shorter (2.08 Å) and two longer (2.32 Å) Li–O bond lengths. Mn3+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent LiO6 octahedra, corners with four equivalent MnO6 octahedra, edges with four equivalent FeO6 octahedra, and edges with eight LiO6 octahedra. The corner-sharing octahedra tilt angles range from 0–8°. There are two shorter (2.01 Å) and four longer (2.08 Å) Mn–O bond lengths. Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with two equivalent LiO6 octahedra, corners with four equivalent FeO6 octahedra, edges with four equivalent MnO6 octahedra, and edges with eight LiO6 octahedra. The corner-sharing octahedra tilt angles range from 0–9°. There are two shorter (2.02 Å) and four longer (2.08 Å) Fe–O bond lengths. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to three Li1+, two equivalent Mn3+, and one Fe3+ atom to form OLi3Mn2Fe octahedra that share corners with six OLi3Mn2Fe octahedra and edges with twelve OLi3MnFe2 octahedra. The corner-sharing octahedra tilt angles range from 0–8°. There are two shorter (2.08 Å) and one longer (2.31 Å) O–Li bond lengths. In the second O2- site, O2- is bonded to three Li1+, one Mn3+, and two equivalent Fe3+ atoms to form OLi3MnFe2 octahedra that share corners with six equivalent OLi3MnFe2 octahedra and edges with twelve OLi3Mn2Fe octahedra. The corner-sharing octahedra tilt angles range from 0–9°. In the third O2- site, O2- is bonded to three Li1+, two equivalent Mn3+, and one Fe3+ atom to form OLi3Mn2Fe octahedra that share corners with six OLi3Mn2Fe octahedra and edges with twelve OLi3MnFe2 octahedra. The corner-sharing octahedra tilt angles range from 0–8°. In the fourth O2- site, O2- is bonded to three Li1+, one Mn3+, and two equivalent Fe3+ atoms to form OLi3MnFe2 octahedra that share corners with six OLi3MnFe2 octahedra and edges with twelve OLi3Mn2Fe octahedra. The corner-sharing octahedra tilt angles range from 0–9°. The O–Li bond length is 2.32 Å. The O–Mn bond length is 2.01 Å.
DOI: 10.17188/1302785
title: Materials Data on Li2MnV3O8 (SG:160) by Materials Project

description: 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
DOI: 10.17188/1302786
title: Materials Data on Li3Co2SbO6 (SG:12) by Materials Project

description: 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
DOI: 10.17188/1302787
title: Materials Data on Li2TiCo3O8 (SG:166) by Materials Project

description: 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
DOI: 10.17188/1302789
title: Materials Data on Li2CoSnO4 (SG:10) by Materials Project

description: 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
DOI: 10.17188/1302790
title: Materials Data on NaMnO2 (SG:12) by Materials Project

description: 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
DOI: 10.17188/1302791
title: Materials Data on NaMnO2 by Materials Project

description: NaMnO2 is Caswellsilverite-like structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with two equivalent MnO6 octahedra, corners with four equivalent NaO6 octahedra, edges with four equivalent NaO6 octahedra, and edges with eight MnO6 octahedra. The corner-sharing octahedra tilt angles range from 1–15°. There are a spread of Na–O bond distances ranging from 2.24–2.48 Å. In the second Na1+ site, Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with two equivalent MnO6 octahedra, corners with four equivalent NaO6 octahedra, edges with four equivalent NaO6 octahedra, and edges with eight MnO6 octahedra. The corner-sharing octahedra tilt angles range from 1–15°. There are a spread of Na–O bond distances ranging from 2.25–2.49 Å. There are two inequivalent Mn3+ sites. In the first Mn3+ site, Mn3+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent NaO6 octahedra, corners with four equivalent MnO6 octahedra, edges with four equivalent MnO6 octahedra, and edges with eight NaO6 octahedra. The corner-sharing octahedra tilt angles range from 1–14°. There are a spread of Mn–O bond distances ranging from 1.93–2.28 Å. In the second Mn3+ site, Mn3+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent NaO6 octahedra, corners with four equivalent MnO6 octahedra, edges with four equivalent MnO6 octahedra, and edges with eight NaO6 octahedra. The corner-sharing octahedra tilt angles range from 1–14°. There are a spread of Mn–O bond distances ranging from 1.93–2.28 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to three Na1+ and three Mn3+ atoms to form a mixture of distorted corner and edge-sharing ONa3Mn3 octahedra. The corner-sharing octahedra tilt angles range from 0–15°. In the second O2- site, O2- is bonded to three Na1+ and three Mn3+ atoms to form a mixture of distorted corner and edge-sharing ONa3Mn3 octahedra. The corner-sharing octahedra tilt angles range from 1–14°. In the third O2- site, O2- is bonded to three Na1+ and three Mn3+ atoms to form a mixture of distorted corner and edge-sharing ONa3Mn3 octahedra. The corner-sharing octahedra tilt angles range from 0–14°. In the fourth O2- site, O2- is bonded to three Na1+ and three Mn3+ atoms to form a mixture of distorted corner and edge-sharing ONa3Mn3 octahedra. The corner-sharing octahedra tilt angles range from 1–15°.
DOI: 10.17188/1302792
title: Materials Data on Li2TiMnO4 (SG:74) by Materials Project

description: 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
DOI: 10.17188/1302794
title: Materials Data on Cr(CoO3)2 (SG:64) by Materials Project

description: 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
DOI: 10.17188/1302795
title: Materials Data on LiLaNb4O12 by Materials Project

description: LiLaNb4O12 crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Li1+ is bonded to twelve O2- atoms to form LiO12 cuboctahedra that share corners with four equivalent LiO12 cuboctahedra, faces with four equivalent LaO12 cuboctahedra, and faces with eight equivalent NbO6 octahedra. There are eight shorter (2.73 Å) and four longer (2.81 Å) Li–O bond lengths. La3+ is bonded to twelve O2- atoms to form LaO12 cuboctahedra that share corners with four equivalent LaO12 cuboctahedra, faces with four equivalent LiO12 cuboctahedra, and faces with eight equivalent NbO6 octahedra. There are eight shorter (2.67 Å) and four longer (2.81 Å) La–O bond lengths. Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six equivalent NbO6 octahedra, faces with two equivalent LiO12 cuboctahedra, and faces with two equivalent LaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–14°. There are a spread of Nb–O bond distances ranging from 1.95–2.07 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to two equivalent Li1+, two equivalent La3+, and two equivalent Nb5+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one La3+, and two equivalent Nb5+ atoms. In the third O2- site, O2- is bonded in a linear geometry to two equivalent Nb5+ atoms.
DOI: 10.17188/1302798
title: Materials Data on Li4Fe3O8 by Materials Project

description: Li4Fe3O8 crystallizes in the trigonal R3m space group. The structure is three-dimensional. there are four inequivalent Li sites. In the first Li site, Li is bonded to six O atoms to form distorted LiO6 octahedra that share corners with six equivalent LiO6 octahedra and edges with six equivalent FeO6 octahedra. The corner-sharing octahedral tilt angles are 12°. There are three shorter (2.19 Å) and three longer (2.20 Å) Li–O bond lengths. In the second Li site, Li is bonded in a 4-coordinate geometry to four O atoms. There is one shorter (1.86 Å) and three longer (2.09 Å) Li–O bond length. In the third Li site, Li is bonded to six O atoms to form LiO6 octahedra that share corners with six equivalent LiO6 octahedra and edges with six equivalent FeO6 octahedra. The corner-sharing octahedral tilt angles are 12°. There are three shorter (2.06 Å) and three longer (2.07 Å) Li–O bond lengths. In the fourth Li site, Li is bonded in a 4-coordinate geometry to four O atoms. There is one shorter (1.86 Å) and three longer (2.09 Å) Li–O bond length. Fe is bonded to six O atoms to form FeO6 octahedra that share edges with four LiO6 octahedra and edges with four equivalent FeO6 octahedra. There is four shorter (1.95 Å) and two longer (2.01 Å) Fe–O bond length. There are four inequivalent O sites. In the first O site, O is bonded in a distorted rectangular see-saw-like geometry to one Li and three equivalent Fe atoms. In the second O site, O is bonded to three Li and two equivalent Fe atoms to form a mixture of edge and corner-sharing OLi3Fe2 trigonal bipyramids. In the third O site, O is bonded in a distorted rectangular see-saw-like geometry to one Li and three equivalent Fe atoms. In the fourth O site, O is bonded to three Li and two equivalent Fe atoms to form a mixture of edge and corner-sharing OLi3Fe2 trigonal bipyramids.
DOI: 10.17188/1302799
title: Materials Data on Fe3Sb(PO4)6 by Materials Project

description: Fe3Sb(PO4)6 crystallizes in the trigonal R3 space group. The structure is three-dimensional. there are three inequivalent Fe sites. In the first Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with six PO4 tetrahedra. All Fe–O bond lengths are 1.99 Å. In the second Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with six PO4 tetrahedra. All Fe–O bond lengths are 1.99 Å. In the third Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with six PO4 tetrahedra. All Fe–O bond lengths are 1.99 Å. Sb is bonded to six O atoms to form SbO6 octahedra that share corners with six PO4 tetrahedra. All Sb–O bond lengths are 1.98 Å. There are two inequivalent P sites. In the first P site, P is bonded to four O atoms to form PO4 tetrahedra that share a cornercorner with one SbO6 octahedra and corners with three FeO6 octahedra. The corner-sharing octahedra tilt angles range from 25–31°. There is three shorter (1.53 Å) and one longer (1.57 Å) P–O bond length. In the second P site, P is bonded to four O atoms to form PO4 tetrahedra that share a cornercorner with one SbO6 octahedra and corners with three FeO6 octahedra. The corner-sharing octahedra tilt angles range from 26–33°. There is three shorter (1.53 Å) and one longer (1.57 Å) P–O bond length. There are eight inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to one Fe and one P atom. In the second O site, O is bonded in a bent 150 degrees geometry to one Fe and one P atom. In the third O site, O is bonded in a bent 150 degrees geometry to one Sb and one P atom. In the fourth O site, O is bonded in a bent 150 degrees geometry to one Fe and one P atom. In the fifth O site, O is bonded in a bent 150 degrees geometry to one Sb and one P atom. In the sixth O site, O is bonded in a bent 150 degrees geometry to one Fe and one P atom. In the seventh O site, O is bonded in a bent 150 degrees geometry to one Fe and one P atom. In the eighth O site, O is bonded in a bent 150 degrees geometry to one Fe and one P atom.
DOI: 10.17188/1302800
title: Materials Data on Li2Cr3(FeO6)2 by Materials Project

description: Li2Cr3(FeO6)2 crystallizes in the orthorhombic Pbcn space group. The structure is three-dimensional. Li1+ is bonded to four O2- atoms to form distorted LiO4 tetrahedra that share corners with four CrO4 tetrahedra and edges with two equivalent FeO6 octahedra. There are a spread of Li–O bond distances ranging from 1.95–2.03 Å. There are two inequivalent Cr+5.33+ sites. In the first Cr+5.33+ site, Cr+5.33+ is bonded to four O2- atoms to form CrO4 tetrahedra that share corners with four equivalent FeO6 octahedra and corners with two equivalent LiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 23–36°. There is two shorter (1.65 Å) and two longer (1.69 Å) Cr–O bond length. In the second Cr+5.33+ site, Cr+5.33+ is bonded to four O2- atoms to form CrO4 tetrahedra that share corners with four equivalent FeO6 octahedra and corners with three equivalent LiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 11–47°. There are a spread of Cr–O bond distances ranging from 1.68–1.73 Å. Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six CrO4 tetrahedra and edges with two equivalent LiO4 tetrahedra. There are a spread of Fe–O bond distances ranging from 1.97–2.11 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Cr+5.33+, and one Fe3+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Cr+5.33+, and one Fe3+ atom. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Li1+, one Cr+5.33+, and one Fe3+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Cr+5.33+, and one Fe3+ atom. In the fifth O2- site, O2- is bonded in a linear geometry to one Cr+5.33+ and one Fe3+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Cr+5.33+ and one Fe3+ atom.
DOI: 10.17188/1302801
title: Materials Data on Li2CrO3 by Materials Project

description: Li2CrO3 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are three inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with six LiO6 octahedra, edges with four equivalent CrO6 octahedra, and edges with eight LiO6 octahedra. The corner-sharing octahedra tilt angles range from 8–10°. There are two shorter (2.08 Å) and four longer (2.09 Å) Li–O bond lengths. In the second Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with two equivalent CrO6 octahedra, corners with four equivalent LiO6 octahedra, edges with four equivalent CrO6 octahedra, and edges with eight LiO6 octahedra. The corner-sharing octahedra tilt angles range from 8–9°. There are four shorter (2.08 Å) and two longer (2.12 Å) Li–O bond lengths. In the third Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share a cornercorner with one LiO6 octahedra, corners with five equivalent CrO6 octahedra, edges with four equivalent CrO6 octahedra, and edges with eight LiO6 octahedra. The corner-sharing octahedra tilt angles range from 2–11°. There are a spread of Li–O bond distances ranging from 2.09–2.21 Å. Cr4+ is bonded to six O2- atoms to form CrO6 octahedra that share corners with six LiO6 octahedra, edges with four equivalent CrO6 octahedra, and edges with eight LiO6 octahedra. The corner-sharing octahedra tilt angles range from 2–11°. There are a spread of Cr–O bond distances ranging from 1.79–2.08 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to four Li1+ and two equivalent Cr4+ atoms to form a mixture of corner and edge-sharing OLi4Cr2 octahedra. The corner-sharing octahedra tilt angles range from 0–10°. In the second O2- site, O2- is bonded to three Li1+ and three equivalent Cr4+ atoms to form a mixture of corner and edge-sharing OLi3Cr3 octahedra. The corner-sharing octahedra tilt angles range from 0–10°. In the third O2- site, O2- is bonded to five Li1+ and one Cr4+ atom to form a mixture of corner and edge-sharing OLi5Cr octahedra. The corner-sharing octahedra tilt angles range from 0–6°.
DOI: 10.17188/1302810
title: Materials Data on Ti(SO4)2 by Materials Project

description: Ti(SO4)2 crystallizes in the trigonal R3 space group. The structure is three-dimensional. there are three inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with six SO4 tetrahedra. There is three shorter (1.96 Å) and three longer (1.99 Å) Ti–O bond length. In the second Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with six SO4 tetrahedra. All Ti–O bond lengths are 1.94 Å. In the third Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with six SO4 tetrahedra. All Ti–O bond lengths are 1.98 Å. There are two inequivalent S6+ sites. In the first S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with three TiO6 octahedra. The corner-sharing octahedra tilt angles range from 23–40°. There are a spread of S–O bond distances ranging from 1.42–1.52 Å. In the second S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with three TiO6 octahedra. The corner-sharing octahedra tilt angles range from 25–37°. There are a spread of S–O bond distances ranging from 1.42–1.52 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Ti4+ and one S6+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Ti4+ and one S6+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one S6+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ti4+ and one S6+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ti4+ and one S6+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ti4+ and one S6+ atom. In the seventh O2- site, O2- is bonded in a single-bond geometry to one S6+ atom. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ti4+ and one S6+ atom.