Showing results 1 to 20 of 23
  Li0.97Fe(II)0.79Fe(III)0.15(PO4), a new oxidized triphylite-type phosphateDal Bo, Fabrice  ; Hatert, Frédéric in Acta Crystallographica Section C-Crystal Structure Communications (2012), C68 Detailed reference viewed: 19 (15 ULg)Fe(II)2.67Fe(III)4(PO4)5.35(HPO4)0.65 and Fe(II)2.23Fe(III)4(PO4)4.45(HPO4)1.55, two new mixed-valence iron phosphates.Dal Bo, Fabrice ; Hatert, Frédéric in Acta Crystallographica Section C-Crystal Structure Communications (2012), C68 Detailed reference viewed: 8 (6 ULg)Na10(Na,Mn)7Mn43(PO4)36, a new synthetic fillowite-type phosphate.Hatert, Frédéric ; ; et alin Acta Crystallographica Section C-Crystal Structure Communications (2009), C65 Detailed reference viewed: 6 (1 ULg)Fe-2(II)(PO4)(OH), a synthetic analogue of wolfeiteHatert, Frédéric in Acta Crystallographica Section C-Crystal Structure Communications (2007), 63(Part 12), 119-121 This paper reports the hydrothermal synthesis and crystal structure refinement of diiron(II) phosphate hydroxide, Fe-2(II)(PO4)(OH), obtained at 1063 K and 2.5 GPa. This phosphate is the synthetic ... [more ▼] This paper reports the hydrothermal synthesis and crystal structure refinement of diiron(II) phosphate hydroxide, Fe-2(II)(PO4)(OH), obtained at 1063 K and 2.5 GPa. This phosphate is the synthetic analogue of the mineral wolfeite, and has a crystal structure topologically identical to those of minerals of the triplite-triploidite group. The complex framework contains edge-and corner-sharing FeO4(OH) and FeO4(OH)(2) polyhedra, linked via corner-sharing to the PO4 tetrahedra (average P-O distances are between 1.537 and 1.544 angstrom). Four five-coordinated Fe sites are at the centers of distorted trigonal bipyramids (average Fe-O distances are between 2.070 and 2.105 angstrom), whereas the coordination environments of the remaining Fe sites are distorted octahedra (average Fe-O distances are between 2.146 and 2.180 angstrom). The Fe-O distances are similar to those observed in natural Mg-rich wolfeite, except for two Fe-O bond distances, which are significantly longer in synthetic Fe-2(2+) (PO4)(OH). [less ▲] Detailed reference viewed: 24 (0 ULg)Na(1.50)Mn(2.48)Al(0.85)(Po4)3, a New Synthetic Alluaudite-Type CompoundHatert, Frédéric in Acta Crystallographica Section C-Crystal Structure Communications (2006), 62(Pt 1), 1-2 The first hydrothermal synthesis of an Al-rich alluaudite-type compound, namely disodium dimanganese aluminium tris(phosphate), which has been obtained at 1073 K and 0.1 GPa starting from the composition ... [more ▼] The first hydrothermal synthesis of an Al-rich alluaudite-type compound, namely disodium dimanganese aluminium tris(phosphate), which has been obtained at 1073 K and 0.1 GPa starting from the composition Na2Mn2Al(PO4)(3), is reported. The crystal structure, which has been refined in the monoclinic C2/c space group, is identical to that of natural alluaudite. The structure consists of kinked chains of edge-sharing M1 and M2 octahedra, which contain Mn2+ and Al3+ ions. The chains are stacked parallel to {101} and are connected in the b direction by the P1 and P2 tetrahedra. These interconnected chains produce channels parallel to c, which contain the large A1 and AT sites occupied by Na+ and Mn2+ ions. [less ▲] Detailed reference viewed: 24 (1 ULg)Dibarium zirconium tetraoxalate trihydrateVertruyen, Bénédicte ; ; Guillaume, Bernard et alin Acta Crystallographica Section C-Crystal Structure Communications (2004), 60(Pt 6), 233-234 A new mixed barium zirconium oxalate, triaquatetra-mu-oxalato-dibarium(II)zirconium(IV), Ba2Zr(C2O4)(4).3H(2)O or [Ba2Zr(C2O4)(4)(H2O)(3)](n), has been synthesized. The complex is built from eightfold ... [more ▼] A new mixed barium zirconium oxalate, triaquatetra-mu-oxalato-dibarium(II)zirconium(IV), Ba2Zr(C2O4)(4).3H(2)O or [Ba2Zr(C2O4)(4)(H2O)(3)](n), has been synthesized. The complex is built from eightfold-coordinated Zr atoms and eleven- and sixfold-coordinated Ba atoms, linked by oxalate groups. The Zr atom, the two Ba atoms and one water O atom lie on crystallographic twofold axes, so that each coordination polyhedron has imposed C2 symmetry. Packing in the crystal is also assumed through hydrogen bonds. [less ▲] Detailed reference viewed: 33 (3 ULg)2-(2-Oxoimidazolidinyl)Ethyl 2-Methylprop-2-EnoateSpirlet, Marie-Rose ; Desreux, Jean-François ; et alin Acta Crystallographica Section C-Crystal Structure Communications (2000), 56((Pt 10)), 1258-9 In the crystal structure of the title compound, C(9)H(14)N(2)O(3), the molecules are linked by N-H.O=C bonds into chains parallel to [001]. Large crystals are readily obtained, presumably because of the ... [more ▼] In the crystal structure of the title compound, C(9)H(14)N(2)O(3), the molecules are linked by N-H.O=C bonds into chains parallel to [001]. Large crystals are readily obtained, presumably because of the hydrogen bonds and an energetically stable conformation of the molecule. [less ▲] Detailed reference viewed: 36 (5 ULg)Zwitterionic (pyrrolidine-2,2-diyl)bisphosphonic acid at 100, 150 and 293KOlive, Gilles ; ; et alin Acta Crystallographica Section C-Crystal Structure Communications (2000), C56(6), 720-722 Structure of the zwitterionic pyrrolidine-2,2-diylbis(phosphonic acid) at 100, 150 and 293 K Detailed reference viewed: 3 (0 ULg)8-Chloro-5-(4-methylpiperazin-1-yl)-11H-pyrido[2,3-b][1,5]benzodiazepine; Liégeois, Jean-François ; et alin Acta Crystallographica Section C-Crystal Structure Communications (1996), C52 Detailed reference viewed: 8 (2 ULg)11-(4-methylpiperazin-1-yl)-5H-pyrido[4,3-b][1,5]benzodiazepine; Liégeois, Jean-François ; et alin Acta Crystallographica Section C-Crystal Structure Communications (1995), C51 Detailed reference viewed: 44 (4 ULg)3-Methyl-6-(4-methylpiperazin-1-yl)-11H-pyrido[2,3-b][1,4]benzodiazepine; Liégeois, Jean-François ; et alin Acta Crystallographica Section C-Crystal Structure Communications (1995), C51 Detailed reference viewed: 12 (4 ULg)Structure du 6-(4-méthylpipérazin-1-yl)-11H-pyrido[2,3-b][1,4]benzodiazépine 1,5-hydrate; ; et al in Acta Crystallographica Section C-Crystal Structure Communications (1992), C48 Detailed reference viewed: 7 (4 ULg)Structure du 8-chloro-11-(méthylpipérazin-1-yl)dibenzo[b,f]-1,4-thiazépine; ; Liégeois, Jean-François et alin Acta Crystallographica Section C-Crystal Structure Communications (1992), C48 Detailed reference viewed: 6 (0 ULg)Structure du méthyl-4 pipérazinyl-1)-10 pyrido[4,3-b][1,4]benzothiazépine; ; Liégeois, Jean-François et alin Acta Crystallographica Section C-Crystal Structure Communications (1991), C47 Detailed reference viewed: 4 (0 ULg)Structures du 11-formyl-5-(4-méthylpipérazin-1-yl)-11H-pyrido[2,3b][1,5]benzodiazépine et du 6-(4-méthylpipérazin-1-yl)-11-méthyl-11H-pyrido[2,3-b][1,4]benzodiazépine; ; et al in Acta Crystallographica Section C-Crystal Structure Communications (1991), C47 Detailed reference viewed: 9 (0 ULg)Structure du N-diméthylaminoéthyl Méthoxy-4 Pyridinesulfonamide-3 et du N-[(éthyl-1pyrrolidinyl-2) méthyl] Pyridinesulfonamide-3; ; Liégeois, Jean-François et alin Acta Crystallographica Section C-Crystal Structure Communications (1990), C46 Detailed reference viewed: 3 (0 ULg)Structure de la Panarine Dihydratée, un Nouvel Alcaloïde Extrait d'un Curare Vénézuélien; ; et al in Acta Crystallographica Section C-Crystal Structure Communications (1988), C44 The crystal structure of Panarine dihydrate isolated from a kind of Venezuelian Curare, C20H22N2O2.2H2O, Mr=358,44 has been solved by direct methods. Panarine has a conformation very similar to that of ... [more ▼] The crystal structure of Panarine dihydrate isolated from a kind of Venezuelian Curare, C20H22N2O2.2H2O, Mr=358,44 has been solved by direct methods. Panarine has a conformation very similar to that of macusine A with a 3-alpha cis configuration. The positive charge on the quaternary nitrogen coexists with a negative charge on a carboxylate group. Molecules are linked together through van der Waals interactions and five hydrogen bonds involving water molecules. [less ▲] Detailed reference viewed: 6 (1 ULg)Structure de la panarine Dihydratée, un Nouvel Alcaloïde Extrait d'un Curare Vénézuélien; ; et al in Acta Crystallographica Section C-Crystal Structure Communications (1988), C44 The crystal structure of Panarine dihydrate was solved by direct methods. This new alkaloid has a conformation very similar to that of macusine A with a 3-alpha cis configuration. The positive charge on ... [more ▼] The crystal structure of Panarine dihydrate was solved by direct methods. This new alkaloid has a conformation very similar to that of macusine A with a 3-alpha cis configuration. The positive charge on the quaternary nitrogen coexists with a negative charge on the carboxylate group. Molecules are linked together through van der Waals interactions and five hydrogen bonds involving water molecules. [less ▲] Detailed reference viewed: 9 (2 ULg)Structure du N-diéthylaminoéthyl méthoxy-4 pyridine sulfonamide-3; ; et al in Acta Crystallographica Section C-Crystal Structure Communications (1988), C44 Detailed reference viewed: 8 (2 ULg)Structure du (Méthyl-1-pipérazinyl-4)-5 Pyrido[2,3-b][1,5]benzothiazépine; ; et al in Acta Crystallographica Section C-Crystal Structure Communications (1988), C44 Detailed reference viewed: 10 (0 ULg)
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