cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17188/1678314
title: Materials Data on Li2PdPb by Materials Project

description: Li2PdPb is Zintl Phase-derived structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are two inequivalent Li sites. In the first Li site, Li is bonded to four equivalent Pd and six equivalent Pb atoms to form distorted LiPd4Pb6 tetrahedra that share corners with six equivalent LiPd4Pb6 tetrahedra, edges with twelve equivalent LiPd6Pb4 tetrahedra, and faces with sixteen LiPd4Pb6 tetrahedra. All Li–Pd bond lengths are 2.84 Å. All Li–Pb bond lengths are 3.28 Å. In the second Li site, Li is bonded to six equivalent Pd and four equivalent Pb atoms to form distorted LiPd6Pb4 tetrahedra that share corners with six equivalent LiPd6Pb4 tetrahedra, edges with twelve equivalent LiPd4Pb6 tetrahedra, and faces with sixteen LiPd4Pb6 tetrahedra. All Li–Pd bond lengths are 3.28 Å. All Li–Pb bond lengths are 2.84 Å. Pd is bonded in a 4-coordinate geometry to ten Li and four equivalent Pb atoms. All Pd–Pb bond lengths are 2.84 Å. Pb is bonded in a 4-coordinate geometry to ten Li and four equivalent Pd atoms.
DOI: 10.17188/1678315
title: Materials Data on V2O5 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: 10.17188/1678316
title: Materials Data on Sc5BRh15 by Materials Project

description: Sc5Rh15B crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. there are three inequivalent Sc sites. In the first Sc site, Sc is bonded to twelve Rh atoms to form ScRh12 cuboctahedra that share corners with twelve ScRh12 cuboctahedra, edges with four equivalent RhSc4Rh8 cuboctahedra, faces with six ScRh12 cuboctahedra, and faces with four equivalent BRh6 octahedra. There are a spread of Sc–Rh bond distances ranging from 2.80–2.86 Å. In the second Sc site, Sc is bonded to twelve Rh atoms to form ScRh12 cuboctahedra that share corners with twelve ScRh12 cuboctahedra, edges with four equivalent RhSc4Rh8 cuboctahedra, faces with four equivalent RhSc4Rh8 cuboctahedra, and faces with six ScRh12 cuboctahedra. There are a spread of Sc–Rh bond distances ranging from 2.77–2.85 Å. In the third Sc site, Sc is bonded to twelve Rh atoms to form ScRh12 cuboctahedra that share corners with twelve ScRh12 cuboctahedra, edges with eight equivalent RhSc4Rh8 cuboctahedra, faces with four equivalent RhSc4Rh8 cuboctahedra, and faces with six ScRh12 cuboctahedra. There are eight shorter (2.79 Å) and four longer (2.85 Å) Sc–Rh bond lengths. There are six inequivalent Rh sites. In the first Rh site, Rh is bonded in a 1-coordinate geometry to four equivalent Sc and one B atom. The Rh–B bond length is 2.10 Å. In the second Rh site, Rh is bonded to four equivalent Sc and eight Rh atoms to form distorted RhSc4Rh8 cuboctahedra that share corners with eight RhSc4Rh8 cuboctahedra, edges with eight ScRh12 cuboctahedra, faces with four equivalent ScRh12 cuboctahedra, and faces with five RhSc4Rh8 cuboctahedra. There are four shorter (2.77 Å) and four longer (2.81 Å) Rh–Rh bond lengths. In the third Rh site, Rh is bonded to four equivalent Sc and eight equivalent Rh atoms to form distorted RhSc4Rh8 cuboctahedra that share corners with twelve RhSc4Rh8 cuboctahedra, edges with eight equivalent ScRh12 cuboctahedra, faces with four equivalent ScRh12 cuboctahedra, and faces with six RhSc4Rh8 cuboctahedra. All Rh–Rh bond lengths are 2.79 Å. In the fourth Rh site, Rh is bonded to four equivalent Sc and two equivalent B atoms to form a mixture of distorted edge, corner, and face-sharing RhSc4B2 octahedra. The corner-sharing octahedral tilt angles are 0°. Both Rh–B bond lengths are 2.01 Å. In the fifth Rh site, Rh is bonded in a distorted square co-planar geometry to four Sc and two equivalent Rh atoms. In the sixth Rh site, Rh is bonded in a distorted square co-planar geometry to four Sc and four Rh atoms. B is bonded to six Rh atoms to form BRh6 octahedra that share corners with four equivalent BRh6 octahedra and faces with eight equivalent ScRh12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°.
DOI: 10.17188/1678317
title: Materials Data on C3S3O2 by Materials Project

description: C3S3O2 crystallizes in the monoclinic P2_1/c space group. The structure is one-dimensional and consists of four C3S3O2 ribbons oriented in the (1, 1, 0) direction. there are three inequivalent C+3.33+ sites. In the first C+3.33+ site, C+3.33+ is bonded in a distorted single-bond geometry to one S2- and one O2- atom. The C–S bond length is 1.78 Å. The C–O bond length is 1.21 Å. In the second C+3.33+ site, C+3.33+ is bonded in a trigonal planar geometry to three S2- atoms. There is one shorter (1.63 Å) and two longer (1.75 Å) C–S bond length. In the third C+3.33+ site, C+3.33+ is bonded in a distorted single-bond geometry to one S2- and one O2- atom. The C–S bond length is 1.78 Å. The C–O bond length is 1.21 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a distorted water-like geometry to two C+3.33+ atoms. In the second S2- site, S2- is bonded in a 2-coordinate geometry to two C+3.33+ atoms. In the third S2- site, S2- is bonded in a distorted single-bond geometry to one C+3.33+ and one O2- atom. The S–O bond length is 3.47 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one C+3.33+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C+3.33+ and one S2- atom.
DOI: 10.17188/1678318
title: Materials Data on Er(CuS)3 by Materials Project

description: ErCu3S3 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. Er3+ is bonded to six equivalent S2- atoms to form ErS6 octahedra that share corners with twelve equivalent CuS4 tetrahedra, edges with three equivalent ErS6 octahedra, and edges with six equivalent CuS4 tetrahedra. All Er–S bond lengths are 2.72 Å. Cu1+ is bonded to four equivalent S2- atoms to form CuS4 tetrahedra that share corners with four equivalent ErS6 octahedra, corners with six equivalent CuS4 tetrahedra, edges with two equivalent ErS6 octahedra, and edges with three equivalent CuS4 tetrahedra. The corner-sharing octahedra tilt angles range from 16–55°. There are a spread of Cu–S bond distances ranging from 2.33–2.41 Å. S2- is bonded in a 6-coordinate geometry to two equivalent Er3+ and four equivalent Cu1+ atoms.
DOI: 10.17188/1678319
title: Materials Data on K2ZrSi3O11 by Materials Project

description: K2ZrSi3O11 crystallizes in the orthorhombic C222_1 space group. The structure is three-dimensional. K is bonded in a 7-coordinate geometry to seven O atoms. There are a spread of K–O bond distances ranging from 2.70–3.15 Å. Zr is bonded to six O atoms to form ZrO6 octahedra that share corners with six SiO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.10–2.14 Å. There are two inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent ZrO6 octahedra and corners with two equivalent SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There is two shorter (1.62 Å) and two longer (1.66 Å) Si–O bond length. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent ZrO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 40–41°. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. There are six inequivalent O sites. In the first O site, O is bonded in a 3-coordinate geometry to one K and two Si atoms. In the second O site, O is bonded in a 2-coordinate geometry to one K, one Zr, and one Si atom. In the third O site, O is bonded in a distorted bent 150 degrees geometry to two equivalent Si atoms. In the fourth O site, O is bonded in a water-like geometry to two equivalent K atoms. In the fifth O site, O is bonded in a 4-coordinate geometry to two equivalent K, one Zr, and one Si atom. In the sixth O site, O is bonded in a 3-coordinate geometry to one K, one Zr, and one Si atom.
DOI: 10.17188/1678320
title: Materials Data on SrMgHg2 by Materials Project

description: SrMgHg2 is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Sr is bonded in a body-centered cubic geometry to eight equivalent Hg atoms. All Sr–Hg bond lengths are 3.25 Å. Mg is bonded in a body-centered cubic geometry to eight equivalent Hg atoms. All Mg–Hg bond lengths are 3.25 Å. Hg is bonded in a body-centered cubic geometry to four equivalent Sr and four equivalent Mg atoms.
DOI: 10.17188/1678321
title: Materials Data on CaYb3 by Materials Project

description: CaYb3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Ca is bonded to twelve equivalent Yb atoms to form CaYb12 cuboctahedra that share corners with twelve equivalent CaYb12 cuboctahedra, edges with twenty-four equivalent YbCa4Yb8 cuboctahedra, faces with six equivalent CaYb12 cuboctahedra, and faces with twelve equivalent YbCa4Yb8 cuboctahedra. All Ca–Yb bond lengths are 3.88 Å. Yb is bonded to four equivalent Ca and eight equivalent Yb atoms to form YbCa4Yb8 cuboctahedra that share corners with twelve equivalent YbCa4Yb8 cuboctahedra, edges with eight equivalent CaYb12 cuboctahedra, edges with sixteen equivalent YbCa4Yb8 cuboctahedra, faces with four equivalent CaYb12 cuboctahedra, and faces with fourteen equivalent YbCa4Yb8 cuboctahedra. All Yb–Yb bond lengths are 3.88 Å.
DOI: 10.17188/1678322
title: Materials Data on LaCd2In by Materials Project

description: LaCd2In crystallizes in the monoclinic C2/m space group. The structure is one-dimensional and consists of two LaCd2In ribbons oriented in the (0, 0, 1) direction. La is bonded in a linear geometry to two equivalent Cd atoms. Both La–Cd bond lengths are 3.40 Å. Cd is bonded in a linear geometry to one La and one In atom. The Cd–In bond length is 3.20 Å. In is bonded in a linear geometry to two equivalent Cd atoms.
DOI: 10.17188/1678323
title: Materials Data on LiMn2F6 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: 10.17188/1678324
title: Materials Data on Ba3Ta2CoO9 by Materials Project

description: Ba3CoTa2O9 is (Cubic) Perovskite-derived structured and crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded to twelve O2- atoms to form BaO12 cuboctahedra that share corners with twelve BaO12 cuboctahedra, faces with six equivalent BaO12 cuboctahedra, faces with two equivalent CoO6 octahedra, and faces with six equivalent TaO6 octahedra. There are six shorter (2.91 Å) and six longer (2.92 Å) Ba–O bond lengths. In the second Ba2+ site, Ba2+ is bonded to twelve O2- atoms to form BaO12 cuboctahedra that share corners with twelve BaO12 cuboctahedra, faces with six BaO12 cuboctahedra, faces with three equivalent CoO6 octahedra, and faces with five equivalent TaO6 octahedra. There are nine shorter (2.92 Å) and three longer (2.95 Å) Ba–O bond lengths. Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with three equivalent TaO6 octahedra, corners with three equivalent CoO6 octahedra, and faces with eight BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are three shorter (1.94 Å) and three longer (2.11 Å) Ta–O bond lengths. Co2+ is bonded to six equivalent O2- atoms to form CoO6 octahedra that share corners with six equivalent TaO6 octahedra and faces with eight BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 2°. All Co–O bond lengths are 2.16 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to four Ba2+, one Ta5+, and one Co2+ atom. In the second O2- site, O2- is bonded in a distorted linear geometry to four Ba2+ and two equivalent Ta5+ atoms.
DOI: 10.17188/1678325
title: Materials Data on LiV6O7F5 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: 10.17188/1678326
title: Materials Data on Mo5PbO8 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: 10.17188/1678328
title: Materials Data on Y2CdAg by Materials Project

description: Y2AgCd crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Y2AgCd ribbons oriented in the (1, 0, 0) direction. Y is bonded in a linear geometry to one Ag and one Cd atom. The Y–Ag bond length is 2.97 Å. The Y–Cd bond length is 3.13 Å. Ag is bonded in a linear geometry to two equivalent Y atoms. Cd is bonded in a linear geometry to two equivalent Y atoms.
DOI: 10.17188/1678329
title: Materials Data on Zn(OF)2 by Materials Project

description: Zn(OF)2 crystallizes in the triclinic P1 space group. The structure is one-dimensional and consists of two Zn(OF)2 ribbons oriented in the (1, 0, 0) direction. Zn is bonded to two O and four F atoms to form edge-sharing ZnO2F4 octahedra. Both Zn–O bond lengths are 2.00 Å. All Zn–F bond lengths are 2.01 Å. There are two inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Zn atom. In the second O site, O is bonded in a single-bond geometry to one Zn atom. There are two inequivalent F sites. In the first F site, F is bonded in an L-shaped geometry to two equivalent Zn atoms. In the second F site, F is bonded in an L-shaped geometry to two equivalent Zn atoms.
DOI: 10.17188/1678330
title: Materials Data on Er3Ge13Os4 by Materials Project

description: Er3Os4Ge13 crystallizes in the cubic Pm-3n space group. The structure is three-dimensional. Er is bonded in a 8-coordinate geometry to four equivalent Os and twelve equivalent Ge atoms. All Er–Os bond lengths are 3.20 Å. There are eight shorter (3.18 Å) and four longer (3.25 Å) Er–Ge bond lengths. Os is bonded in a 6-coordinate geometry to three equivalent Er and six equivalent Ge atoms. All Os–Ge bond lengths are 2.50 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 2-coordinate geometry to three equivalent Er, two equivalent Os, and one Ge atom. The Ge–Ge bond length is 3.03 Å. In the second Ge site, Ge is bonded in a cuboctahedral geometry to twelve equivalent Ge atoms.
DOI: 10.17188/1678331
title: Materials Data on NdFeO3 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: 10.17188/1678333
title: Materials Data on SiGeN2 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: 10.17188/1678335
title: Materials Data on CaNiO2 by Materials Project

description: NiOCaO crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Ca2+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. All Ca–O bond lengths are 2.48 Å. Ni2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Ni–O bond lengths are 1.89 Å. O2- is bonded to four equivalent Ca2+ and two equivalent Ni2+ atoms to form a mixture of edge, corner, and face-sharing OCa4Ni2 octahedra. The corner-sharing octahedra tilt angles range from 0–65°.
DOI: 10.17188/1678336
title: Materials Data on Tb5Ru2 by Materials Project

description: Tb5Ru2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are three inequivalent Tb sites. In the first Tb site, Tb is bonded in a 2-coordinate geometry to three equivalent Ru atoms. There are a spread of Tb–Ru bond distances ranging from 2.76–3.41 Å. In the second Tb site, Tb is bonded to four equivalent Ru atoms to form distorted edge-sharing TbRu4 tetrahedra. There are two shorter (2.90 Å) and two longer (2.95 Å) Tb–Ru bond lengths. In the third Tb site, Tb is bonded in a 3-coordinate geometry to three equivalent Ru atoms. There are a spread of Tb–Ru bond distances ranging from 2.85–3.06 Å. Ru is bonded in a 7-coordinate geometry to eight Tb atoms.
DOI: 10.17188/1678337
title: Materials Data on Cd(CoO2)2 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: 10.17188/1678338
title: Materials Data on La4Fe(NiO4)3 by Materials Project

description: La4Fe(NiO4)3 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.41–2.81 Å. In the second La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.40–2.80 Å. Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six NiO6 octahedra. The corner-sharing octahedra tilt angles range from 20–22°. All Fe–O bond lengths are 1.97 Å. There are three inequivalent Ni3+ sites. In the first Ni3+ site, Ni3+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with two equivalent NiO6 octahedra and corners with four equivalent FeO6 octahedra. The corner-sharing octahedral tilt angles are 22°. There are four shorter (2.00 Å) and two longer (2.01 Å) Ni–O bond lengths. In the second Ni3+ site, Ni3+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with two equivalent FeO6 octahedra and corners with four equivalent NiO6 octahedra. The corner-sharing octahedra tilt angles range from 20–21°. There are a spread of Ni–O bond distances ranging from 1.99–2.01 Å. In the third Ni3+ site, Ni3+ is bonded to six O2- atoms to form corner-sharing NiO6 octahedra. The corner-sharing octahedra tilt angles range from 21–22°. There are a spread of Ni–O bond distances ranging from 1.95–1.97 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to three La3+, one Fe3+, and one Ni3+ atom. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Ni3+ atoms. In the third O2- site, O2- is bonded in a 5-coordinate geometry to three La3+, one Fe3+, and one Ni3+ atom. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Ni3+ atoms. In the fifth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Ni3+ atoms. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+, one Fe3+, and one Ni3+ atom.
DOI: 10.17188/1678339
title: Materials Data on K2TaF7 by Materials Project

description: K2TaF7 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 11-coordinate geometry to eleven F1- atoms. There are a spread of K–F bond distances ranging from 2.72–3.08 Å. In the second K1+ site, K1+ is bonded in a 10-coordinate geometry to ten F1- atoms. There are a spread of K–F bond distances ranging from 2.77–3.26 Å. Ta5+ is bonded in a distorted pentagonal bipyramidal geometry to seven F1- atoms. There are a spread of Ta–F bond distances ranging from 1.97–2.00 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted single-bond geometry to three equivalent K1+ and one Ta5+ atom. In the second F1- site, F1- is bonded in a 1-coordinate geometry to three K1+ and one Ta5+ atom. In the third F1- site, F1- is bonded in a 1-coordinate geometry to three K1+ and one Ta5+ atom. In the fourth F1- site, F1- is bonded in a 1-coordinate geometry to three K1+ and one Ta5+ atom.
DOI: 10.17188/1678340
title: Materials Data on Tm2Se3 by Materials Project

description: Tm2Se3 crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. there are two inequivalent Tm3+ sites. In the first Tm3+ site, Tm3+ is bonded to six Se2- atoms to form a mixture of edge and corner-sharing TmSe6 octahedra. The corner-sharing octahedral tilt angles are 4°. There are a spread of Tm–Se bond distances ranging from 2.82–2.86 Å. In the second Tm3+ site, Tm3+ is bonded to six Se2- atoms to form a mixture of edge and corner-sharing TmSe6 octahedra. The corner-sharing octahedra tilt angles range from 3–4°. There are a spread of Tm–Se bond distances ranging from 2.83–2.85 Å. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a rectangular see-saw-like geometry to four Tm3+ atoms. In the second Se2- site, Se2- is bonded in a rectangular see-saw-like geometry to four Tm3+ atoms.
DOI: 10.17188/1678341
title: Materials Data on Cr2SbAs by Materials Project

description: Cr2SbAs is Caswellsilverite-like structured and crystallizes in the orthorhombic Pmc2_1 space group. The structure is three-dimensional. there are two inequivalent Cr3+ sites. In the first Cr3+ site, Cr3+ is bonded to four equivalent Sb3- and two equivalent As3- atoms to form a mixture of distorted edge, face, and corner-sharing CrSb4As2 octahedra. The corner-sharing octahedra tilt angles range from 46–56°. There are two shorter (2.64 Å) and two longer (2.68 Å) Cr–Sb bond lengths. There are one shorter (2.51 Å) and one longer (2.80 Å) Cr–As bond lengths. In the second Cr3+ site, Cr3+ is bonded to two equivalent Sb3- and four equivalent As3- atoms to form CrSb2As4 octahedra that share corners with twelve CrSb4As2 octahedra, edges with six CrSb4As2 octahedra, and faces with two equivalent CrSb2As4 octahedra. The corner-sharing octahedra tilt angles range from 46–56°. There are one shorter (2.64 Å) and one longer (2.67 Å) Cr–Sb bond lengths. There are two shorter (2.63 Å) and two longer (2.64 Å) Cr–As bond lengths. Sb3- is bonded in a 6-coordinate geometry to six Cr3+ atoms. As3- is bonded in a 6-coordinate geometry to six Cr3+ atoms.