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1996 (1)
1Author    Ute Berger, Wolfgang SchnickRequires cookie*
 Title    Ba2Na(CN2)(CN)3, ein neues Cyanamid-cyanid mit interpenetrierenden Teilstrukturen Ba2Na(CN2)(CN)3, a Novel Cyanamide Cyanide with Interpenetrating Substructures  
 Abstract    Ba2Na(CN2)(CN)3 was obtained by the reaction of Ba2N with melamine and NaCN at 700 °C. The compound was structurally characterized by single-crystal X-ray investigations (Fd3m, a = 1518.8(3) pm, Z = 16). In the crystal structure the Ba"+ ions form a cubic close packed arrangement, the Na+ and the CN2_ ions occupy the octahedral interstices. The CN-ions are located within the close packed Ba2+ layers. The unit cell of Ba2Na(CN2)(CN)3 contains two interpenetrating substructures of the zinc-blende structure type, building up a variant of NaTl. A reversible phase transition has been observed during cooling of the compound. Whereas the Ba2(CN2)(CN)3 sublattice remains nearly unaffected in this process, the Na+ ions of the low-temperature phase are statistically distributed on two crystallographic positions. 
  Reference    (Z. Naturforsch. 51b, 1—8 [1996]; eingegangen am 7. Juni 1995) 
  Published    1996 
  Keywords    Cyanamide Cyanides, Synthesis, Crystal Structure, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0001.pdf 
 Identifier    ZNB-1996-51b-0001 
 Volume    51