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1995 (1)
1Author    R. Upert Marx3, HansMichael MayerbRequires cookie*
 Title    Reindarstellung und Kristallstruktur von Lithiumnitriddibromid, Li5NBr2 Preparation and Crystal Structure of Lithium Nitride Dibromide, Li5N B r2  
 Abstract    Single phase Li5NBr2 was prepared by the reaction of Li3N and dry, O H -free LiBr under inert gas at 430 °C. In the quasi-binary system Li3_2*Ni_ vB rir, Li5NBr2 is the second most nitride rich compound after Li10N 3Br. Following unit cell indexing using laboratory X-ray powder data the previously unknown structure o f Li5NBr2 was solved from neutron powder diffraction data recorded at the flat-cone and powder diffractometer E 2 at the rebuilt reactor BER II in Berlin. The title compound crystallizes in the orthorhombic space group Immm (No. 71), a = 603.79(4), b -1181.3(1), c = 390.14(3) pm with two formula units per unit cell. The L i-N -sublattice comprises linear chains of vertex sharing Li6N-octahedra which are aligned along the short c-axis and are separated by chains o f bromine atoms. The N -B r arrangement may be regarded as an ordered A X 2 variant o f a cubic close packing involving two kinds of atoms. Lithium atoms occupy the tetrahedral holes formed by one nitrogen and three bromine atoms, as well as the N -N edges of the N 2Br2 tetrahedra. 
  Reference    Z. Naturforsch. 50b, 1353—1358 (1995); eingegangen am 16. Februar 1995 
  Published    1995 
  Keywords    Lithium Nitride Dibromide, Preparation, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1353.pdf 
 Identifier    ZNB-1995-50b-1353 
 Volume    50