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1995[X]
1Author    J. Schaefer, K. BluhmRequires cookie*
 Title    Synthese und Kristallstruktur von CuLn2[B20 5]2 (Ln = Er3*, Lu3+): zwei Kupferlanthanoidborate m it^ [B 20 5 ]4_-A nionen Synthesis and Crystal Structure of CuLn2[B20 5]2 (Ln = E r3+, Lu3+): Two Copper Lanthanoid B orates with 2.[B20 5]4~-Anions  
 Abstract    Single crystals of the new com pounds CuLn2[B20 5]2 (Ln = Er3+(I), Lu3+(II)) were ob­ tained by a B9O 3 flux-technique. They crystallize in the space group C ih -P 2 \lc with I: a = 453.14(6); b = 721.94(5); c = 929.5(4) pm; ß = 90.01(3)°; Z = 2 und II: a = 451.4(4); b = 718.3(1); c = 928.1(3) pm; ß = 90.00(6)°; Z = 2. The compounds are isotypic to CuTm2[B20 5 ] 2 as well as to the mineral Gadolinite (FeY 2 [B eSi0 5 ]2) and exhibit layer like 2.[B20 5]4 --anions consisting of edge sharing B 0 4 -tetrahedra, which form four-and eight-membered rings. The borate anions are separated by layers of elongated C u 0 6-octahedra and slightly distorted tetragonal L n 0 8-antiprisms. 
  Reference    Z. Naturforsch. 50b, 1141—1145 (1995); eingegangen am 19. Januar 1995 
  Published    1995 
  Keywords    Copper, Erbium, Lutetium, Borate, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1141.pdf 
 Identifier    ZNB-1995-50b-1141 
 Volume    50