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'Chain Structure' in keywords Facet   Publication Year 1992  [X]
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1992[X]
1Author    K. Urt, O. KleppRequires cookie*
 Title    Darstellung und Kristallstruktur von Na4Ga2S5. Ein Thiogallat mit i -[Ga2S5]4_ -Z weier-Doppelketten Preparation and Crystal Structure of N a4G a2S5. A Thiogallate with ],-[Ga2S5]4~-zweier-Double Chains  
 Abstract    T ransparent single crystals of N a4G a2S5 were obtained from a melt of N a2S, G a and S. N a4G a2S5 is monoclinic, space group P 2 l/c with a = 7.967(1), b = 6.133(2), c = 19.852(9) Ä, ß = 91.61(2)°, Z = 4. Its crystal structure was refined to a conventional R o f 0.033 for 1150 observed reflections. The structure of N a4G a2S5 is of a new type. It is characterized by infinite ribbon like thiogal­ late anions, ,J,-[Ga2S5] , which are built up by G aS4-tetrahedra (mean G a -S bond length 2.28 Ä) sharing apices and edges. The four crystallographically independent alkali cations are coordinated to six sulphur atoms in distorted octahedral configurations. 
  Reference    Z. Naturforsch. 47b, 937—941 (1992); eingegangen am 1. O ktober 1991 /7. Februar 1992 
  Published    1992 
  Keywords    Thiogallate(III), Crystal Structure, Chain Structure 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0937.pdf 
 Identifier    ZNB-1992-47b-0937 
 Volume    47 
2Author    C. Hristian, Robl, Stephanie HentschelRequires cookie*
 Title    Unendliche Y2(H2O)10[C6(COO)6]-Ketten in Y2[C6(COO)6] * 14H20  
 Abstract    Infinite Chains o f Y2(H2O)10[C6(COO)6] in Y 2[C6(COO)6] • 14H20 Colourless monoclinic single crystals of Y ^C ^C O O)^ • 14H20 were grown in aqueous silica gel (space group P 2 Jn, a = 847.5(1), b = 923.4(2), c = 1632.0(3) pm, ß = 100.33(1)°, Z = 2, 223 param eters, 1784 reflections, Rg = 0.0357). Y 3+ is coordinated by 5 water molecules and 3 oxygen atom s o f the mellitate anion in a dodecahedral fashion. Y 3+ and [C6(COO)6]6-ions are linked by coordinative bonds, yielding infinite chains o f com position Y 2(H 2O)10[C6(COO)6] extending parallel to [100], Hydrogen bonds connect adjacent chains. 
  Reference    Z. Naturforsch. 47b, 1561—15 (1992); eingegangen am 5. M ärz 1992 
  Published    1992 
  Keywords    Y ttrium Mellitate, X-Ray, Chain Structure, Hydrogen Bonding, Differential Thermal Analysis 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1561.pdf 
 Identifier    ZNB-1992-47b-1561 
 Volume    47