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'Lattice Constants' in keywords Facet   Publication Year 1994  [X]
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1Author    M. Arkus Brylak, Wolfgang JeitschkoRequires cookie*
 Title    U3TiSb5, U3VSb5, U3CrSb5, and U3MnSb5 with "Anti"-Hf5Sn3Cu Type Structure  
 Abstract    The title compounds have been prepared from the elem ental com ponents by arc-melting and subsequent annealing. Single crystals of U 3TiSb5 and U 3M nSb5 were obtained from a tin flux and their structures were determined from single-crystal X-ray data: P 63/mcm, Z = 2; a = 913.9(2), c = 611.2(1) pm, R = 0.011 (233 structure factors, 14 variables) for U 3TiSb5 and a = 916.8(2), c = 613.2(1) pm, R = 0.015 (427 structure factors, 14 variables) for U 3MnSb5. The lattice constants of the isotypic compounds are: a -908.2(2), c = 608.3(2) pm for U 3VSb5 and a -911.0(1), c = 611.5(1) pm for U^CrSb^. The structure of these antimonides may be regarded as an "anti"-type structure of Hf5Sn3Cu with the antimony atoms on the hafnium sites, while the positions of the uranium and transition metal atoms correspond to the posi­ tions of the tin and copper atoms. A comparison o f the interatomic distances of UVTiSbs with those of U 3Sb4, USb2, and a-antimony suggests oxidation numbers according to (U +III)3Ti+,v(S b l_III)3(S b 2_,I)2, where the Sb2 atoms form weakly bonded chains. 
  Reference    Z. Naturforsch. 49b, 747—752 (1994); received D ecem ber 16 1993 
  Published    1994 
  Keywords    Lattice Constants, Antimonides, X-Ray 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0747.pdf 
 Identifier    ZNB-1994-49b-0747 
 Volume    49