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'Niobium Pentabromide' in keywords Facet   Publication Year 1983  [X]
Facet   section ZfN Section B:Volume 038  [X]
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1Author    Ulrich Müller, Paul KlingelhöferRequires cookie*
 Title    /3-NbBr5, eine neue Modifikation von Niobpentabromid mit einer eindimensionalen Lagenfehlordnung ß-NbBrs, a New Modification of Niobium Pentabromide Having One-Dimensional Stacking Disorder  
 Abstract    While trying to react NbBrs with sulfur in a closed tube, crystals of the new modification /?-NbBra were obtained. Its X-ray diffraction patterns have sharp reflexions and diffuse streaks showing the presence of a one-dimensional disorder. From the sharp reflexions alone, a statistically averaged sub-structure results; it has the space group Ccmm and the lattice constants ao = 644, bo = 1867 and Co = 615 pm. Taking into account the diffuse streaks, the true structure was deduced; its lattice constants are a = 2ao, c = Co, b indefinite due to the disorder. /?-NbBrs is isostructural to tantalum pentaiodide. It consists of layers of (NbBrs)2 molecules that are stacked with displacement faults in the direction of b. The bromine atoms have a hexagonal close-packing arrangement. 
  Reference    Z. Naturforsch. 38b, 559—561 (1983); eingegangen am 25. Januar 1983 
  Published    1983 
  Keywords    Niobium Pentabromide, Crystal Structure, Stacking Faults 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0559.pdf 
 Identifier    ZNB-1983-38b-0559 
 Volume    38