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 Abstract    Kristallstruktur von [(CH3)4N]2TeCl6 und über die Einschlußverbindung [(CH3)4N]2(CH3CN)TeCl6 The Crystal Structure of [(CH 3)4N]2TeCl6 and the Inclusion Com pound [(CH3)4N]2(CH 3C N)TeCl6 W alter Abriel* Both title com pounds show an antifluorite-like arrangement o f (C H 3)4N + cations and TeC l62~ anions. The remaining octahedral holes in this array can be filled with C H 3CN m olecules forming the inclusion com pound by crystallization from C H 3CN solution. [(C H 3)4N ]2TeC l6 (space group F d 3c with a = 25.791(3) Ä at 265(5) K and Z = 32) contains almost regular TeCl62-octahedra. In contrast, in [(CH 3)4N ]2(C H 3C N)T eC l6 (space group Cmcm with a = 12.765(6), b = 14.349(7), c = 12.716(3) Ä and Z = 4) the anion is statically distorted with the approximate point symmetry 4 mm. A t tem peratures above 320 K the solvent m olecules can be rem oved yielding the F d 3c phase. Finally, structural relationships betw een antifluorite-like phases A 2B X 6 and elpasolites A 2B 'B X 6 considering halogenides and cyanides are discussed. 
  Reference    Z. Naturforsch. 41b, 592 (1986); eingegangen am 3. Februar 1986 
  Published    1986 
  Keywords    Crystal Structure, Tellurates, Inclusion C om pound, Lone Pair Electrons 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-0592.pdf 
 Identifier    ZNB-1986-41b-0592 
 Volume    41