cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17188/1264402
title: Materials Data on KZr2(PO4)3 by Materials Project

description: KZr2(PO4)3 crystallizes in the trigonal R-3c space group. The structure is three-dimensional. K1+ is bonded in a distorted hexagonal planar geometry to six equivalent O2- atoms. All K–O bond lengths are 2.86 Å. Zr4+ is bonded to six O2- atoms to form ZrO6 octahedra that share corners with six equivalent PO4 tetrahedra. There are three shorter (2.09 Å) and three longer (2.11 Å) Zr–O bond lengths. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 27–29°. There is two shorter (1.54 Å) and two longer (1.55 Å) P–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Zr4+, and one P5+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Zr4+ and one P5+ atom.
DOI: 10.17188/1264403
title: Materials Data on Cs2ZnCl4 by Materials Project

description: Cs2ZnCl4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to eight Cl1- atoms. There are a spread of Cs–Cl bond distances ranging from 3.67–4.02 Å. In the second Cs1+ site, Cs1+ is bonded in a 9-coordinate geometry to nine Cl1- atoms. There are a spread of Cs–Cl bond distances ranging from 3.51–3.88 Å. Zn2+ is bonded in a tetrahedral geometry to four Cl1- atoms. There are one shorter (2.28 Å) and three longer (2.29 Å) Zn–Cl bond lengths. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted single-bond geometry to four Cs1+ and one Zn2+ atom. In the second Cl1- site, Cl1- is bonded in a distorted single-bond geometry to five Cs1+ and one Zn2+ atom. In the third Cl1- site, Cl1- is bonded in a distorted single-bond geometry to four Cs1+ and one Zn2+ atom.
DOI: 10.17188/1264404
title: Materials Data on K2PdO2 by Materials Project

description: K2PdO2 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. K1+ is bonded in a 6-coordinate geometry to six equivalent O2- atoms. There are four shorter (2.80 Å) and two longer (3.13 Å) K–O bond lengths. Pd2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Pd–O bond lengths are 2.09 Å. O2- is bonded in a 2-coordinate geometry to six equivalent K1+ and two equivalent Pd2+ atoms.
DOI: 10.17188/1264405
title: Materials Data on BaGa2(GeO4)2 by Materials Project

description: BaGa2Ge2O8 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ba2+ is bonded to seven O2- atoms to form distorted BaO7 hexagonal pyramids that share corners with five GaO4 tetrahedra, corners with five GeO4 tetrahedra, an edgeedge with one GaO4 tetrahedra, and an edgeedge with one GeO4 tetrahedra. There are a spread of Ba–O bond distances ranging from 2.77–2.85 Å. There are two inequivalent Ga3+ sites. In the first Ga3+ site, Ga3+ is bonded to four O2- atoms to form GaO4 tetrahedra that share corners with three equivalent BaO7 hexagonal pyramids and corners with four GeO4 tetrahedra. There is one shorter (1.83 Å) and three longer (1.87 Å) Ga–O bond length. In the second Ga3+ site, Ga3+ is bonded to four O2- atoms to form GaO4 tetrahedra that share corners with two equivalent BaO7 hexagonal pyramids, corners with four GeO4 tetrahedra, and an edgeedge with one BaO7 hexagonal pyramid. There are a spread of Ga–O bond distances ranging from 1.84–1.88 Å. There are two inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with three equivalent BaO7 hexagonal pyramids and corners with four GaO4 tetrahedra. There are a spread of Ge–O bond distances ranging from 1.75–1.79 Å. In the second Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two equivalent BaO7 hexagonal pyramids, corners with four GaO4 tetrahedra, and an edgeedge with one BaO7 hexagonal pyramid. There are a spread of Ge–O bond distances ranging from 1.76–1.78 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Ga3+, and one Ge4+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ba2+, one Ga3+, and one Ge4+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ba2+, one Ga3+, and one Ge4+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ga3+ and one Ge4+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ba2+, one Ga3+, and one Ge4+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one Ga3+, and one Ge4+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one Ga3+, and one Ge4+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one Ga3+, and one Ge4+ atom.
DOI: 10.17188/1264406
title: Materials Data on Tl2SnO3 by Materials Project

description: Tl2SnO3 is Orthorhombic Perovskite-like structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Tl1+ sites. In the first Tl1+ site, Tl1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Tl–O bond distances ranging from 2.53–2.94 Å. In the second Tl1+ site, Tl1+ is bonded in a 3-coordinate geometry to three O2- atoms. There are two shorter (2.58 Å) and one longer (2.64 Å) Tl–O bond lengths. Sn4+ is bonded to six O2- atoms to form edge-sharing SnO6 octahedra. There are a spread of Sn–O bond distances ranging from 2.05–2.20 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Tl1+ and three equivalent Sn4+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two Tl1+ and two equivalent Sn4+ atoms. In the third O2- site, O2- is bonded in a 5-coordinate geometry to four Tl1+ and one Sn4+ atom.
DOI: 10.17188/1264407
title: Materials Data on Na2FeH4C5(N2O)3 by Materials Project

description: Na2FeC5H4(N2O)3 crystallizes in the orthorhombic Pnnm space group. The structure is one-dimensional and consists of two Na2FeC5H4(N2O)3 ribbons oriented in the (1, 0, 0) direction. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to four N3- and two equivalent O2- atoms to form edge-sharing NaN4O2 octahedra. There are two shorter (2.51 Å) and two longer (2.56 Å) Na–N bond lengths. Both Na–O bond lengths are 2.56 Å. In the second Na1+ site, Na1+ is bonded to four N3- and two equivalent O2- atoms to form edge-sharing NaN4O2 octahedra. There are two shorter (2.49 Å) and two longer (2.56 Å) Na–N bond lengths. Both Na–O bond lengths are 2.51 Å. Fe2+ is bonded in a distorted single-bond geometry to three C+3.20+ and one N3- atom. There is one shorter (1.92 Å) and two longer (1.93 Å) Fe–C bond length. The Fe–N bond length is 1.66 Å. There are three inequivalent C+3.20+ sites. In the first C+3.20+ site, C+3.20+ is bonded in a distorted linear geometry to one Fe2+ and one N3- atom. The C–N bond length is 1.17 Å. In the second C+3.20+ site, C+3.20+ is bonded in a distorted single-bond geometry to one N3- atom. The C–N bond length is 1.17 Å. In the third C+3.20+ site, C+3.20+ is bonded in a linear geometry to one Fe2+ and one N3- atom. The C–N bond length is 1.17 Å. There are four inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted linear geometry to one Na1+ and one C+3.20+ atom. In the second N3- site, N3- is bonded in a linear geometry to one Fe2+ and one O2- atom. The N–O bond length is 1.15 Å. In the third N3- site, N3- is bonded in a distorted trigonal planar geometry to two equivalent Na1+ and one C+3.20+ atom. In the fourth N3- site, N3- is bonded in a distorted trigonal planar geometry to two Na1+ and one C+3.20+ atom. There are two 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. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one N3- atom. In the second O2- site, O2- is bonded in a distorted water-like geometry to two Na1+ and two H1+ atoms.
DOI: 10.17188/1264408
title: Materials Data on Fe2(TeO3)3 by Materials Project

description: Fe2(TeO3)3 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Fe3+ is bonded to six O2- atoms to form distorted face-sharing FeO6 octahedra. There are a spread of Fe–O bond distances ranging from 1.94–2.16 Å. There are three inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. There is two shorter (1.88 Å) and one longer (1.97 Å) Te–O bond length. In the second Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. All Te–O bond lengths are 1.92 Å. In the third Te4+ site, Te4+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.89–2.64 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe3+ and one Te4+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe3+ and one Te4+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Fe3+ and one Te4+ atom. In the fourth O2- site, O2- is bonded in a trigonal non-coplanar geometry to two equivalent Fe3+ and one Te4+ atom. In the fifth O2- site, O2- is bonded in a distorted T-shaped geometry to two equivalent Fe3+ and one Te4+ atom. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Fe3+ and two Te4+ atoms.
DOI: 10.17188/1264409
title: Materials Data on Ti4Tl2O9 by Materials Project

description: Tl2Ti4O9 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are four inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ti–O bond distances ranging from 1.77–2.29 Å. In the second Ti4+ site, Ti4+ is bonded to six O2- atoms to form a mixture of distorted corner and edge-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles are 32°. There are a spread of Ti–O bond distances ranging from 1.80–2.25 Å. In the third Ti4+ site, Ti4+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ti–O bond distances ranging from 1.73–2.37 Å. In the fourth Ti4+ site, Ti4+ is bonded to six O2- atoms to form a mixture of distorted corner and edge-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles are 31°. There are a spread of Ti–O bond distances ranging from 1.81–2.20 Å. There are two inequivalent Tl1+ sites. In the first Tl1+ site, Tl1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Tl–O bond distances ranging from 2.83–3.21 Å. In the second Tl1+ site, Tl1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Tl–O bond distances ranging from 2.73–3.06 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two Ti4+ and two equivalent Tl1+ atoms. In the second O2- site, O2- is bonded in a single-bond geometry to one Ti4+ and six Tl1+ atoms. In the third O2- site, O2- is bonded in a distorted water-like geometry to two Ti4+ and two equivalent Tl1+ atoms. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to two Ti4+ and two equivalent Tl1+ atoms. In the fifth O2- site, O2- is bonded in a distorted linear geometry to two Ti4+ and two equivalent Tl1+ atoms. In the sixth O2- site, O2- is bonded to four Ti4+ atoms to form a mixture of distorted corner and edge-sharing OTi4 trigonal pyramids. In the seventh O2- site, O2- is bonded to four Ti4+ atoms to form a mixture of distorted corner and edge-sharing OTi4 trigonal pyramids. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to three Ti4+ atoms. In the ninth O2- site, O2- is bonded to four Ti4+ atoms to form a mixture of distorted corner and edge-sharing OTi4 trigonal pyramids.
DOI: 10.17188/1264413
title: Materials Data on CsMnI3 by Materials Project

description: CsMnI3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Cs1+ is bonded to twelve equivalent I1- atoms to form CsI12 cuboctahedra that share corners with six equivalent CsI12 cuboctahedra, corners with six equivalent MnI6 octahedra, faces with eight equivalent CsI12 cuboctahedra, and faces with six equivalent MnI6 octahedra. The corner-sharing octahedral tilt angles are 18°. There are six shorter (4.18 Å) and six longer (4.30 Å) Cs–I bond lengths. Mn2+ is bonded to six equivalent I1- atoms to form MnI6 octahedra that share corners with six equivalent CsI12 cuboctahedra, faces with six equivalent CsI12 cuboctahedra, and faces with two equivalent MnI6 octahedra. All Mn–I bond lengths are 2.92 Å. I1- is bonded in a 6-coordinate geometry to four equivalent Cs1+ and two equivalent Mn2+ atoms.
DOI: 10.17188/1264414
title: Materials Data on K2U7O22 by Materials Project

description: K2U7O22 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.79–3.33 Å. There are four inequivalent U6+ sites. In the first U6+ site, U6+ is bonded to six O2- atoms to form UO6 octahedra that share corners with four equivalent UO6 octahedra and corners with two equivalent UO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 52°. There are a spread of U–O bond distances ranging from 1.93–2.27 Å. In the second U6+ site, U6+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share a cornercorner with one UO6 octahedra and edges with two equivalent UO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 30°. There are a spread of U–O bond distances ranging from 1.84–2.56 Å. In the third U6+ site, U6+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of U–O bond distances ranging from 1.91–2.63 Å. In the fourth U6+ site, U6+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing UO6 octahedra. The corner-sharing octahedral tilt angles are 52°. There are a spread of U–O bond distances ranging from 1.80–2.40 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to three U6+ atoms. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three U6+ atoms. In the third O2- site, O2- is bonded in a trigonal planar geometry to three U6+ atoms. In the fourth O2- site, O2- is bonded in a trigonal planar geometry to three U6+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to three U6+ atoms. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one U6+ atom. In the seventh O2- site, O2- is bonded in a single-bond geometry to one K1+ and one U6+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to one K1+ and one U6+ atom. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+ and two U6+ atoms.
DOI: 10.17188/1264477
title: Materials Data on RbNd(PO3)4 by Materials Project

description: RbNdP4O12 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Rb1+ is bonded in a 11-coordinate geometry to eleven O2- atoms. There are a spread of Rb–O bond distances ranging from 2.96–3.59 Å. Nd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Nd–O bond distances ranging from 2.38–2.54 Å. There are four inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.63 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form corner-sharing PO4 tetrahedra. There is two shorter (1.50 Å) and two longer (1.63 Å) P–O bond length. In the third P5+ site, P5+ is bonded to four O2- atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.63 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form corner-sharing PO4 tetrahedra. There is two shorter (1.50 Å) and two longer (1.62 Å) P–O bond length. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Rb1+, one Nd3+, and one P5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+, one Nd3+, and one P5+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+, one Nd3+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to two P5+ atoms. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+, one Nd3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+, one Nd3+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+, one Nd3+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Nd3+ and one P5+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Rb1+ and two P5+ atoms. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Rb1+ and two P5+ atoms. In the eleventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Rb1+ and two P5+ atoms. In the twelfth O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+, one Nd3+, and one P5+ atom.
DOI: 10.17188/1264479
title: Materials Data on Nb3Se5Cl7 by Materials Project

description: Nb3Se5Cl7 crystallizes in the monoclinic P2_1/m space group. The structure is one-dimensional and consists of one Nb3Se5Cl7 ribbon oriented in the (0, 1, 0) direction. there are two inequivalent Nb+3.67+ sites. In the first Nb+3.67+ site, Nb+3.67+ is bonded in a 8-coordinate geometry to four Se+0.80- and four Cl1- atoms. There are a spread of Nb–Se bond distances ranging from 2.64–2.66 Å. There are a spread of Nb–Cl bond distances ranging from 2.58–2.66 Å. In the second Nb+3.67+ site, Nb+3.67+ is bonded in a distorted octahedral geometry to one Se+0.80- and five Cl1- atoms. The Nb–Se bond length is 2.30 Å. There are a spread of Nb–Cl bond distances ranging from 2.34–2.83 Å. There are three inequivalent Se+0.80- sites. In the first Se+0.80- site, Se+0.80- is bonded in a 2-coordinate geometry to two equivalent Nb+3.67+ atoms. In the second Se+0.80- site, Se+0.80- is bonded in a 10-coordinate geometry to two equivalent Nb+3.67+ atoms. In the third Se+0.80- site, Se+0.80- is bonded in a single-bond geometry to one Nb+3.67+ atom. There are five inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in an L-shaped geometry to two equivalent Nb+3.67+ atoms. In the second Cl1- site, Cl1- is bonded in an L-shaped geometry to two equivalent Nb+3.67+ atoms. In the third Cl1- site, Cl1- is bonded in a 3-coordinate geometry to three Nb+3.67+ atoms. In the fourth Cl1- site, Cl1- is bonded in a distorted water-like geometry to two Nb+3.67+ atoms. In the fifth Cl1- site, Cl1- is bonded in a single-bond geometry to one Nb+3.67+ atom.
DOI: 10.17188/1264480
title: Materials Data on K3IO5 by Materials Project

description: K3O5I crystallizes in the tetragonal P4/ncc space group. The structure is three-dimensional. there are three inequivalent K sites. In the first K site, K is bonded to five O atoms to form KO5 square pyramids that share corners with five equivalent IO5 square pyramids. There are one shorter (2.55 Å) and four longer (2.64 Å) K–O bond lengths. In the second K site, K is bonded in a distorted body-centered cubic geometry to eight equivalent O atoms. There are four shorter (2.81 Å) and four longer (2.97 Å) K–O bond lengths. In the third K site, K is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of K–O bond distances ranging from 3.17–3.39 Å. There are two inequivalent O sites. In the first O site, O is bonded to five K and one I atom to form a mixture of distorted edge and corner-sharing OK5I octahedra. The corner-sharing octahedral tilt angles are 8°. The O–I bond length is 1.83 Å. In the second O site, O is bonded in a 6-coordinate geometry to five K and one I atom. The O–I bond length is 1.87 Å. I is bonded to five O atoms to form distorted IO5 square pyramids that share corners with five equivalent KO5 square pyramids.
DOI: 10.17188/1264481
title: Materials Data on K3SnTe3 by Materials Project

description: K3SnTe3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 6-coordinate geometry to six Te2- atoms. There are a spread of K–Te bond distances ranging from 3.47–4.17 Å. In the second K1+ site, K1+ is bonded to six Te2- atoms to form a mixture of distorted corner and edge-sharing KTe6 octahedra. The corner-sharing octahedral tilt angles are 35°. There are a spread of K–Te bond distances ranging from 3.58–3.76 Å. In the third K1+ site, K1+ is bonded in a 6-coordinate geometry to six Te2- atoms. There are a spread of K–Te bond distances ranging from 3.50–4.00 Å. Sn3+ is bonded in a trigonal non-coplanar geometry to three Te2- atoms. All Sn–Te bond lengths are 2.78 Å. There are three inequivalent Te2- sites. In the first Te2- site, Te2- is bonded in a 7-coordinate geometry to six K1+ and one Sn3+ atom. In the second Te2- site, Te2- is bonded in a 7-coordinate geometry to six K1+ and one Sn3+ atom. In the third Te2- site, Te2- is bonded to six K1+ and one Sn3+ atom to form distorted edge-sharing TeK6Sn pentagonal bipyramids.