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'Hafnium' in keywords Facet   section ZfN Section B  [X]
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1Author    Herbert Plenio, HerbertW. RoeskyRequires cookie*
 Title    Synthese achtgliedriger Metallacyclen mit einem M(NSN) 2 M-Gerüst (M = Zr, Hf) Syntheses of Eight-Membered Metallacyeles with a M(NSN) 2 M-Frame (M = Zr, Hf)  
 Abstract    The reactions of Cp.ZrCU, CpCp*ZrCh and CpCp*HfCU (Cp* = C s Me s , Cp = C S H S) with Me 3 SnNSNSnMe 3 yield the compounds Cp 2 Zr(NSN) 2 ZrCp 2 (1), CpCp*Zr(NSN) 2 ZrCpCp* (2) and CpCp*Hf(NSN) 2 HfCpCp* (3) as thermally and air-stable yellow solids. 2 and 3 exist as two different isomers with identical cyclopentadienyl-groups located on the same or on the opposite side of the metallacycle. 
  Reference    Z. Naturforsch. 43b, 1575—1578 (1988); eingegangen am 20. Juli 1988 
  Published    1988 
  Keywords    Metallacycle, Zirconium, Hafnium 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-1575.pdf 
 Identifier    ZNB-1988-43b-1575 
 Volume    43 
2Author    C. Rumpf, W. BenschRequires cookie*
 Title    Synthesis and Crystal Structure of New Ternary Chalcogenides of Group IV Metals: K2ZrS4, Rb2ZrS4, and Rb2HfS4  
 Abstract    The new ternary one-dimensional chain compounds K2ZrS4 , Rb2ZrS4 and Rb2HfS4 were prepared at 350 °C by reacting A2S3 and S with elemental M (A = K, Rb; M = Zr, Hf). They are isostructural, crystallizing in the orthorhombic space group Pbca with Z = 8 . The M atoms are in a distorted octahedral environment of four S2_ anions and one S22~ unit. The structure consists of infinite anionic chains comprised of edge-sharing M S6 octahedra running parallel to the [001] direction separated by the alkali metal cations. The composition of the chain may be formulated as j-,[MS4/ 2 (S2)2 -]. The two crystallographically independent alkali cations are in eight-and ninefold coordination of S atoms. 
  Reference    Z. Naturforsch. 55b, 695—698 (2000); received Mai 2 2000 
  Published    2000 
  Keywords    Polychalcogenides, Zirconium, Hafnium 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0695.pdf 
 Identifier    ZNB-2000-55b-0695 
 Volume    55 
3Author    A. Drašner, Ž. BlažinaRequires cookie*
 Title    Structural Studies in the Systems ZrZn 2 _ x Al x and HfZn 2 _ x Al x  
 Abstract    A great number of samples in the systems ZrZ^-arAls and HfZn2_xAl z was prepared and investigated by means of X-ray powder diffraction. In both systems hitherto unknown ternary Friauf-Laves structures of the MgCu2-type (S. G. Fd3m) were identified. Their homogeneity regions were determined to be ZrZno.eAl1.4-ZrZno.4Al1.6 and HfZn1.25Alo.75-HfZno.sAli.s, respectively. The unit cell parameter of ZrZno.sAli.s is a = 747.3 ± 0.3 pm, and for HfZno.sAli.s a = 741.4 ± 0.3 pm. For the alloys of these particular compositions the atomic positions were determined using trial and error methods. In the investigated systems, depending on the composition and/or thermal treatment, alloys having the AuCu3 structure (S. G. Pm3m) were also observed. Structural correlations of these ternary Friauf-Laves phases with their corresponding binary prototypes were made in terms of stacking sequences. 
  Reference    Z. Naturforsch. 36b, 1547—1550 (1981); received August 21 1981 
  Published    1981 
  Keywords    Aluminum, Hafnium, Zinc, Zirconium, Alloy 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1547.pdf 
 Identifier    ZNB-1981-36b-1547 
 Volume    36 
4Author    H. Erbert, W. Roesky, Birgit Meller-Rehbein, M. Athias NoltemeyerRequires cookie*
 Title    Reactions of M e2NC(S)SN(SiMe3)2 with M etal Halides -Crystal Structure of M e2NCS2ZrCl3 * 3 Pyridine  
 Abstract    M e-,NC(S)SN(SiM e3)2 (1) reacts with TeCl4 and N bC lj to yield M e2N C (S)SN TeC l2 (4) and 
  Reference    Z. Naturforsch. 46b, 1117—1121 (1991); eingegangen am 14. Februar 1991 
  Published    1991 
  Keywords    Tellurium, Niobium, Zirconium, Hafnium, Complexes, X-Ray 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1117_n.pdf 
 Identifier    ZNB-1991-46b-1117_n 
 Volume    46