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1982 (1)
1Author    HeinzW. Rotter, Gerhard ThieleRequires cookie*
 Title    Fehlordnung von Kationen und Kristallwasser bei kubischen Alkalitetrabromo-und -iodothallaten(III) Disorder of Cations and Water Molecules in Cubic Tetrabromo-and -iodothallates  
 Abstract    Tetrabromo-and -iodothallates(III) of the alkali cations crystallise from aqueous solutions as cubic hydrates MTlX4-nH20 (M = Li, Na, K, Rb, Cs, NH4; X — Br, I; n — 1-2). The tetraiodothallates retain their cubic structure on dehydratisation, while the tetrabromothallates undergo structural changes. The X-ray structure analyses of RbTlBr4 • H20, NH4TlBr4 • 2HoO and KTlBr4 • 2H20 (—50 °C) showed that these com-pounds consist of a three-dimensional framework of TlBr4 tetrahedra and MBrjo ikosahedra which reminds of zeolites. In cavities of this framework 2/3 of the alkali cations and the crystal water molecules are accommodated in a disordered manner. 
  Reference    Z. Naturforsch. 37b, 995—1004 (1982); eingegangen am 3. März 1982 
  Published    1982 
  Keywords    Thallium, Tetrabromothallate, Disorder, Tetraiodothallate, Crystal Structure 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0995.pdf 
 Identifier    ZNB-1982-37b-0995 
 Volume    37