cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17188/1738206
title: Materials Data on HoSiPd2 by Materials Project

description: HoPd2Si is delta Molybdenum Boride-derived structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Ho is bonded in a 11-coordinate geometry to ten equivalent Pd and three equivalent Si atoms. There are a spread of Ho–Pd bond distances ranging from 2.96–3.53 Å. There are two shorter (2.98 Å) and one longer (3.03 Å) Ho–Si bond lengths. Pd is bonded in a 12-coordinate geometry to five equivalent Ho, four equivalent Pd, and three equivalent Si atoms. There are a spread of Pd–Pd bond distances ranging from 2.78–3.05 Å. There are a spread of Pd–Si bond distances ranging from 2.49–2.62 Å. Si is bonded in a 9-coordinate geometry to three equivalent Ho and six equivalent Pd atoms.
DOI: 10.17188/1738207
title: Materials Data on SrMg2 by Materials Project

description: Mg2Sr is Tungsten Carbide-like structured and crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Sr is bonded in a 12-coordinate geometry to six Mg atoms. There are three shorter (3.59 Å) and three longer (3.62 Å) Sr–Mg bond lengths. There are three inequivalent Mg sites. In the first Mg site, Mg is bonded to six equivalent Mg atoms to form distorted edge-sharing MgMg6 pentagonal pyramids. All Mg–Mg bond lengths are 3.07 Å. In the second Mg site, Mg is bonded to three equivalent Sr and three equivalent Mg atoms to form a mixture of distorted face, edge, and corner-sharing MgSr3Mg3 pentagonal pyramids. In the third Mg site, Mg is bonded in a 6-coordinate geometry to six equivalent Sr atoms.
DOI: 10.17188/1738208
title: Materials Data on Li3V3P8O29 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: 10.17188/1738209
title: Materials Data on AlMoN3 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: 10.17188/1738210
title: Materials Data on Li2FeSn(PO4)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: 10.17188/1738211
title: Materials Data on LiAl by Materials Project

description: LiAl crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Li is bonded in a 11-coordinate geometry to four equivalent Li and seven Al atoms. There are one shorter (2.86 Å) and three longer (2.95 Å) Li–Li bond lengths. There are one shorter (2.87 Å) and six longer (2.95 Å) Li–Al bond lengths. There are two inequivalent Al sites. In the first Al site, Al is bonded in a 9-coordinate geometry to six equivalent Li and three equivalent Al atoms. All Al–Al bond lengths are 2.58 Å. In the second Al site, Al is bonded in a 11-coordinate geometry to eight equivalent Li and three equivalent Al atoms.
DOI: 10.17188/1738212
title: Materials Data on Li2Mn4OF8 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: 10.17188/1738213
title: Materials Data on Li2CrSi3O8 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: 10.17188/1738215
title: Materials Data on Cs2MnSi5O12 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: 10.17188/1738216
title: Materials Data on Tm6Ta4Al43 by Materials Project

description: Tm6Ta4Al43 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. Tm is bonded in a 6-coordinate geometry to one Tm, one Ta, and fifteen Al atoms. The Tm–Tm bond length is 3.47 Å. The Tm–Ta bond length is 3.47 Å. There are a spread of Tm–Al bond distances ranging from 3.05–3.46 Å. There are two inequivalent Ta sites. In the first Ta site, Ta is bonded to twelve Al atoms to form TaAl12 cuboctahedra that share edges with six equivalent AlTa2Al10 cuboctahedra. There are six shorter (2.69 Å) and six longer (2.90 Å) Ta–Al bond lengths. In the second Ta site, Ta is bonded in a 10-coordinate geometry to two equivalent Tm and ten Al atoms. There are a spread of Ta–Al bond distances ranging from 2.65–2.75 Å. There are seven inequivalent Al sites. In the first Al site, Al is bonded in a 12-coordinate geometry to one Tm, two Ta, and nine Al atoms. There are a spread of Al–Al bond distances ranging from 2.76–3.07 Å. In the second Al site, Al is bonded in a 12-coordinate geometry to two equivalent Tm, one Ta, and nine Al atoms. There are a spread of Al–Al bond distances ranging from 2.74–3.05 Å. In the third Al site, Al is bonded in a 12-coordinate geometry to four equivalent Tm and eight Al atoms. There are a spread of Al–Al bond distances ranging from 2.78–3.06 Å. In the fourth Al site, Al is bonded in a 12-coordinate geometry to two equivalent Tm, one Ta, and nine Al atoms. There are a spread of Al–Al bond distances ranging from 2.73–3.07 Å. In the fifth Al site, Al is bonded in a 12-coordinate geometry to two equivalent Tm, one Ta, and seven Al atoms. There are two shorter (2.82 Å) and one longer (2.88 Å) Al–Al bond lengths. In the sixth Al site, Al is bonded to two equivalent Ta and ten Al atoms to form distorted AlTa2Al10 cuboctahedra that share corners with four equivalent AlTm3Al9 cuboctahedra, edges with two equivalent TaAl12 cuboctahedra, and faces with two equivalent AlTa2Al10 cuboctahedra. Both Al–Al bond lengths are 2.83 Å. In the seventh Al site, Al is bonded to three equivalent Tm and nine Al atoms to form AlTm3Al9 cuboctahedra that share corners with six AlTa2Al10 cuboctahedra and faces with two equivalent AlTm3Al9 cuboctahedra.
DOI: 10.17188/1738217
title: Materials Data on MnNbH8(OF)5 by Materials Project

description: NbMnH8(OF)5 crystallizes in the monoclinic P2_1 space group. The structure is one-dimensional and consists of two NbMnH8(OF)5 ribbons oriented in the (1, 0, 1) direction. Nb5+ is bonded to one O2- and five F1- atoms to form NbOF5 octahedra that share corners with two equivalent MnO5F octahedra. The corner-sharing octahedra tilt angles range from 15–17°. The Nb–O bond length is 1.78 Å. There are four shorter (2.00 Å) and one longer (2.11 Å) Nb–F bond lengths. Mn2+ is bonded to five O2- and one F1- atom to form MnO5F octahedra that share corners with two equivalent NbOF5 octahedra. The corner-sharing octahedra tilt angles range from 15–17°. There are a spread of Mn–O bond distances ranging from 2.15–2.21 Å. The Mn–F bond length is 2.12 Å. There are eight inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to one Mn2+ and two H1+ atoms. In the second O2- site, O2- is bonded in a distorted water-like geometry to one Mn2+ and two H1+ atoms. In the third O2- site, O2- is bonded in a distorted water-like geometry to one Mn2+ and two H1+ atoms. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to one Mn2+ and two H1+ atoms. In the fifth O2- site, O2- is bonded in a distorted linear geometry to one Nb5+ and one Mn2+ atom. There are five inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Nb5+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Nb5+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one Nb5+ atom. In the fourth F1- site, F1- is bonded in a distorted linear geometry to one Nb5+ and one Mn2+ atom. In the fifth F1- site, F1- is bonded in a single-bond geometry to one Nb5+ atom.
DOI: 10.17188/1738218
title: Materials Data on Cu3RuN by Materials Project

description: RuCu3N is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Ru is bonded to twelve equivalent Cu atoms to form RuCu12 cuboctahedra that share corners with twelve equivalent RuCu12 cuboctahedra, faces with six equivalent RuCu12 cuboctahedra, and faces with eight equivalent NCu6 octahedra. All Ru–Cu bond lengths are 2.74 Å. Cu is bonded in a linear geometry to four equivalent Ru and two equivalent N atoms. Both Cu–N bond lengths are 1.94 Å. N is bonded to six equivalent Cu atoms to form NCu6 octahedra that share corners with six equivalent NCu6 octahedra and faces with eight equivalent RuCu12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°.
DOI: 10.17188/1738219
title: Materials Data on HPd by Materials Project

description: PdH is Wurtzite structured and crystallizes in the hexagonal P6_3mc space group. The structure is three-dimensional. Pd is bonded to four equivalent H atoms to form corner-sharing PdH4 tetrahedra. There is one shorter (1.82 Å) and three longer (1.85 Å) Pd–H bond length. H is bonded to four equivalent Pd atoms to form corner-sharing HPd4 tetrahedra.
DOI: 10.17188/1738221
title: Materials Data on Li5Fe5O12 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: 10.17188/1738222
title: Materials Data on NaVF6 by Materials Project

description: NaVF6 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Na1+ is bonded to seven F1- atoms to form distorted NaF7 pentagonal bipyramids that share corners with five equivalent VF6 octahedra, an edgeedge with one VF6 octahedra, and edges with two equivalent NaF7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 20–40°. There are a spread of Na–F bond distances ranging from 2.37–2.58 Å. V5+ is bonded to six F1- atoms to form VF6 octahedra that share corners with five equivalent NaF7 pentagonal bipyramids and an edgeedge with one NaF7 pentagonal bipyramid. There are a spread of V–F bond distances ranging from 1.78–1.85 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a 3-coordinate geometry to two equivalent Na1+ and one V5+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one V5+ atom. In the third F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one Na1+ and one V5+ atom. In the fourth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one Na1+ and one V5+ atom.
DOI: 10.17188/1738223
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: 10.17188/1738224
title: Materials Data on Tm2PdAu by Materials Project

description: Tm2PdAu is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Tm is bonded in a body-centered cubic geometry to four equivalent Pd and four equivalent Au atoms. All Tm–Pd bond lengths are 3.04 Å. All Tm–Au bond lengths are 3.04 Å. Pd is bonded in a body-centered cubic geometry to eight equivalent Tm atoms. Au is bonded in a body-centered cubic geometry to eight equivalent Tm atoms.
DOI: 10.17188/1738225
title: Materials Data on Yb5P12Ru19 by Materials Project

description: Yb5Ru19P12 crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. there are two inequivalent Yb sites. In the first Yb site, Yb is bonded in a 2-coordinate geometry to ten Ru and six P atoms. There are a spread of Yb–Ru bond distances ranging from 3.04–3.34 Å. There are four shorter (3.04 Å) and two longer (3.09 Å) Yb–P bond lengths. In the second Yb site, Yb is bonded in a 6-coordinate geometry to nine Ru and six equivalent P atoms. There are three shorter (3.11 Å) and six longer (3.13 Å) Yb–Ru bond lengths. All Yb–P bond lengths are 2.98 Å. There are five inequivalent Ru sites. In the first Ru site, Ru is bonded in a 9-coordinate geometry to six equivalent Yb and three equivalent P atoms. All Ru–P bond lengths are 2.30 Å. In the second Ru site, Ru is bonded in a distorted single-bond geometry to six Ru and five P atoms. There are two shorter (2.82 Å) and four longer (2.88 Å) Ru–Ru bond lengths. There are one shorter (2.26 Å) and four longer (2.79 Å) Ru–P bond lengths. In the third Ru site, Ru is bonded in a 12-coordinate geometry to two equivalent Yb, four equivalent Ru, and four P atoms. All Ru–Ru bond lengths are 2.82 Å. There are two shorter (2.29 Å) and two longer (2.34 Å) Ru–P bond lengths. In the fourth Ru site, Ru is bonded in a 12-coordinate geometry to three Yb, five Ru, and four P atoms. Both Ru–Ru bond lengths are 2.80 Å. There are a spread of Ru–P bond distances ranging from 2.37–2.39 Å. In the fifth Ru site, Ru is bonded in a 12-coordinate geometry to three Yb, five Ru, and four P atoms. The Ru–Ru bond length is 2.72 Å. There are a spread of Ru–P bond distances ranging from 2.30–2.50 Å. There are three inequivalent P sites. In the first P site, P is bonded in a 9-coordinate geometry to four equivalent Yb and five Ru atoms. In the second P site, P is bonded in a 9-coordinate geometry to two equivalent Yb and seven Ru atoms. In the third P site, P is bonded in a 9-coordinate geometry to two equivalent Yb and seven Ru atoms.
DOI: 10.17188/1738226
title: Materials Data on NaCu3Te2 by Materials Project

description: NaCu3Te2 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Na1+ is bonded to six equivalent Te2- atoms to form NaTe6 octahedra that share corners with six equivalent CuCu6Te6 cuboctahedra, corners with eighteen equivalent CuCu3Te4 tetrahedra, edges with six equivalent CuCu6Te6 cuboctahedra, edges with six equivalent NaTe6 octahedra, and faces with two equivalent CuCu3Te4 tetrahedra. All Na–Te bond lengths are 3.21 Å. There are two inequivalent Cu1+ sites. In the first Cu1+ site, Cu1+ is bonded to six equivalent Cu1+ and six equivalent Te2- atoms to form distorted CuCu6Te6 cuboctahedra that share corners with six equivalent NaTe6 octahedra, corners with six equivalent CuCu3Te4 tetrahedra, edges with six equivalent NaTe6 octahedra, faces with six equivalent CuCu6Te6 cuboctahedra, and faces with six equivalent CuCu3Te4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. All Cu–Cu bond lengths are 2.60 Å. All Cu–Te bond lengths are 3.11 Å. In the second Cu1+ site, Cu1+ is bonded to three equivalent Cu1+ and four equivalent Te2- atoms to form distorted CuCu3Te4 tetrahedra that share corners with three equivalent CuCu6Te6 cuboctahedra, corners with nine equivalent NaTe6 octahedra, corners with three equivalent CuCu3Te4 tetrahedra, edges with six equivalent CuCu3Te4 tetrahedra, faces with three equivalent CuCu6Te6 cuboctahedra, a faceface with one NaTe6 octahedra, and faces with three equivalent CuCu3Te4 tetrahedra. The corner-sharing octahedra tilt angles range from 50–52°. All Cu–Te bond lengths are 2.70 Å. Te2- is bonded in a 10-coordinate geometry to three equivalent Na1+ and seven Cu1+ atoms.
DOI: 10.17188/1738228
title: Materials Data on Mn2SiW by Materials Project

description: WMn2Si crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two WMn2Si ribbons oriented in the (1, 0, 0) direction. W is bonded in a linear geometry to two equivalent Mn atoms. Both W–Mn bond lengths are 2.77 Å. Mn is bonded in a linear geometry to one W and one Si atom. The Mn–Si bond length is 2.31 Å. Si is bonded in a linear geometry to two equivalent Mn atoms.
DOI: 10.17188/1738229
title: Materials Data on As2SeS2 by Materials Project

description: As2SeS2 crystallizes in the monoclinic P2_1/c space group. The structure is one-dimensional and consists of two As2SeS2 ribbons oriented in the (0, 0, 1) direction. there are two inequivalent As3+ sites. In the first As3+ site, As3+ is bonded in a distorted T-shaped geometry to one Se2- and two S2- atoms. The As–Se bond length is 2.48 Å. Both As–S bond lengths are 2.31 Å. In the second As3+ site, As3+ is bonded in a 3-coordinate geometry to one Se2- and two S2- atoms. The As–Se bond length is 2.50 Å. There are one shorter (2.29 Å) and one longer (2.31 Å) As–S bond lengths. Se2- is bonded in an L-shaped geometry to two As3+ atoms. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a bent 120 degrees geometry to two As3+ atoms. In the second S2- site, S2- is bonded in an L-shaped geometry to two As3+ atoms.
DOI: 10.17188/1738230
title: Materials Data on SrYCoO4 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: 10.17188/1738231
title: Materials Data on Er3Co2Si3 by Materials Project

description: Er3Co2Si3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Er3+ sites. In the first Er3+ site, Er3+ is bonded to five Si4- atoms to form ErSi5 trigonal bipyramids that share corners with four equivalent CoSi4 tetrahedra, corners with six equivalent ErSi5 trigonal bipyramids, and edges with four equivalent CoSi4 tetrahedra. There are a spread of Er–Si bond distances ranging from 2.83–3.18 Å. In the second Er3+ site, Er3+ is bonded in a 6-coordinate geometry to seven Si4- atoms. There are a spread of Er–Si bond distances ranging from 2.89–3.26 Å. Co+1.50+ is bonded to four Si4- atoms to form CoSi4 tetrahedra that share corners with three equivalent CoSi4 tetrahedra, corners with two equivalent ErSi5 trigonal bipyramids, edges with two equivalent CoSi4 tetrahedra, and edges with two equivalent ErSi5 trigonal bipyramids. There are a spread of Co–Si bond distances ranging from 2.32–2.56 Å. There are two inequivalent Si4- sites. In the first Si4- site, Si4- is bonded in a 9-coordinate geometry to seven Er3+ and two equivalent Co+1.50+ atoms. In the second Si4- site, Si4- is bonded in a 10-coordinate geometry to six Er3+, three equivalent Co+1.50+, and one Si4- atom. The Si–Si bond length is 2.68 Å.
DOI: 10.17188/1738232
title: Materials Data on Li3V3P8O29 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: 10.17188/1738233
title: Materials Data on LaMg2Ag by Materials Project

description: Mg2LaAg is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Mg is bonded in a body-centered cubic geometry to four equivalent La and four equivalent Ag atoms. All Mg–La bond lengths are 3.15 Å. All Mg–Ag bond lengths are 3.15 Å. La is bonded in a distorted body-centered cubic geometry to eight equivalent Mg and six equivalent Ag atoms. All La–Ag bond lengths are 3.64 Å. Ag is bonded in a distorted body-centered cubic geometry to eight equivalent Mg and six equivalent La atoms.
DOI: 10.17188/1738234
title: Materials Data on Eu2Se3 by Materials Project

description: Eu2Se3 crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. there are two inequivalent Eu3+ sites. In the first Eu3+ site, Eu3+ is bonded to six Se2- atoms to form a mixture of corner and edge-sharing EuSe6 octahedra. The corner-sharing octahedral tilt angles are 7°. There are a spread of Eu–Se bond distances ranging from 2.92–2.97 Å. In the second Eu3+ site, Eu3+ is bonded to six Se2- atoms to form a mixture of corner and edge-sharing EuSe6 octahedra. The corner-sharing octahedra tilt angles range from 6–7°. There are a spread of Eu–Se bond distances ranging from 2.95–3.02 Å. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a rectangular see-saw-like geometry to four Eu3+ atoms. In the second Se2- site, Se2- is bonded in a rectangular see-saw-like geometry to four Eu3+ atoms.
DOI: 10.17188/1738235
title: Materials Data on Zr(SiPd)3 by Materials Project

description: Zr(PdSi)3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Zr4+ is bonded to eight equivalent Si4- atoms to form distorted ZrSi8 hexagonal bipyramids that share corners with four equivalent PdSi4 tetrahedra, edges with four equivalent ZrSi8 hexagonal bipyramids, edges with two equivalent PdSi4 tetrahedra, and faces with four equivalent ZrSi8 hexagonal bipyramids. There are four shorter (2.81 Å) and four longer (2.95 Å) Zr–Si bond lengths. There are two inequivalent Pd+2.67+ sites. In the first Pd+2.67+ site, Pd+2.67+ is bonded to four Si4- atoms to form PdSi4 tetrahedra that share corners with four equivalent ZrSi8 hexagonal bipyramids, corners with two equivalent PdSi4 tetrahedra, and edges with two equivalent ZrSi8 hexagonal bipyramids. There are two shorter (2.43 Å) and two longer (2.50 Å) Pd–Si bond lengths. In the second Pd+2.67+ site, Pd+2.67+ is bonded in a 5-coordinate geometry to five Si4- atoms. There are a spread of Pd–Si bond distances ranging from 2.51–2.58 Å. There are two inequivalent Si4- sites. In the first Si4- site, Si4- is bonded in a 8-coordinate geometry to four equivalent Zr4+, three Pd+2.67+, and one Si4- atom. The Si–Si bond length is 2.36 Å. In the second Si4- site, Si4- is bonded in a 8-coordinate geometry to eight Pd+2.67+ atoms.