Wagener, Michael

Preferred name
Wagener, Michael

Settings

Now showing 1 - 1 of 1
  • Some of the metrics are blocked by your 
    consent settings
    PublicationAccess status: Open Access ,
    Synthese, Charakterisierung und strukturchemische Aspekte von Kupfer- und Silberchalkogenohalogeniden sowie von Halogeno- und Oxochalkogenaten(IV)
    (2005)
    Wagener, Michael
    The main focus of the present work was the synthesis and characterization of copper- and silverchalcogenohalides as well as chalcogenates(IV). All compounds except the oxoselenates(IV) were obtained by “hydrothermal synthesis with concentrated hydrohalide acids”. The following new compounds were prepared: Ag6GeS4X2 (X = Cl, Br, I), AgICh3 (Ch = Se, Te), CuTe3.75I16, Cs2SeBr6, 4CoSeO3×3H2O, Co(HSeO3)2, Cs2Co(HSeO3)2Cl2, Cs2MII 3(SeO3)4×18H2O (MII = Co, Ni). While Ag6GeS4I2 is a typical member of the argyrodite family, the equally composed compounds Ag6GeS4Cl2 and Ag6GeS4Br2 crystallize in a new structure type. The anionic partial structure is closely related to the AlB2-structure. The compounds AgICh3, which crystallize isotypically to CuBrSe3, consist of formally neutral, cyclohexane-analogue Ch6 rings embedded in a matrix of AgI. In addition to the structural investigations, density functional tight binding calculations were performed. CuTe3.75I16 can be described on the basis of a hexagonal close packing of iodine. The characteristic of this compound is a highly anisotropic, not fully occupied Teposition caused by a positional disorder. Contrary to the compound 4CoSeO3×3H2O, which crystallizes isotypically to the Mn and Cd species, Cs2Co(HSeO3)2Cl2 represents a new structure type. So far the solids Cs2MII 3(SeO3)4×18H2O are the only known quasi-ternary oxoselenates( IV), where the metal-cations are exclusively coordinated by the oxygen atoms of the water molecules of crystallization.
    Source Type:Doctoral Thesis
      2  14