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'High Pressure Synthesis' in keywords Facet   Publication Year 1995  [X]
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1Author    Alexandra Atzesdorfer, Klaus-Jürgen RangeRequires cookie*
 Title    Sodium Metaperrhenate, N aR e04: High Pressure Synthesis of Single Crystals and Structure Refinement  
 Abstract    Single crystals of sodium metaperrhenate, N a R e 0 4, have been obtained by oxidation of rhe­ nium metal with sodium nitrate under high pres­ sure-high temperature conditions (m odified Belt-type apparatus, 4 kbar, 400 °C, Au-capsules). The crystals are tetragonal, space group 14^0, with a = 5.3654(4), c = 11.732(2) A and Z = 4. The struc­ ture was refined to R -0.026, Rw = 0.013 for 382 unique, absorption-corrected reflections. The scheelite-type structure for N a R e 0 4, pro­ posed by Beintema in 1937, could be confirmed. It consists of isolated R e 0 4 tetrahedra (R e -O = 1.728(2) A), connected by N aO s dodecahedra (< N a -0 > = 2.582(2) Ä). 
  Reference    Z. Naturforsch. 50b, 1417—1418 (1995); received April 24 1995 
  Published    1995 
  Keywords    Sodium Metaperrhenate, Single Crystals, High Pressure Synthesis, Structure Refinem ent 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1417_n.pdf 
 Identifier    ZNB-1995-50b-1417_n 
 Volume    50