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2001 (1)
1999 (1)
1Author    NorbertA. Harringer, Andreas Kolb, KurtO. KleppRequires cookie*
 Title    Na2ZrSe3, ein neues Chalcogenometallat(IV) mit Schichtstruktur Na2ZrSe3, a New Chalcogenometallate(IV) with a Layered Structure  
 Abstract    Orange red crystals of Na2ZrSe3 were obtained by the reaction of Na2Se, Zr and Se at 800 °C. The new compound is monoclinic, s. g. C2/m with a = 6.952(2), b = 12.01(1), c = 7.257(2) A, ß = 108.81(2)°, Z = 4. Its crystal structure was determined from single crystal diffractometer data (Mo-KQ-radiation) and refined to a conventional R of 0.016. It is characterized by layers based on a distorted ccp packing of Se-atoms where all metal atoms occupy octahedral voids in an ordered fashion. Zr atoms are located on the nodes of a 6 3-net forming CrCl3 type selenozirconate layer (d(Zr-Se) = 2.702 A). 
  Reference    Z. Naturforsch. 56b, 1322—1324 (2001); eingegangen am 30. August 2001 
  Published    2001 
  Keywords    Complex Chalcogenides, Selenides, Zirconium 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1322.pdf 
 Identifier    ZNB-2001-56b-1322 
 Volume    56 
2Author    KurtO. Klepp, Andreas KolbRequires cookie*
 Title    Komplexe Chalkogenide der IVa Metalle mit niedrigdimensionalen anionischen Partialstrukturen. Darstellung und Kristallstruktur von K2ZrTe3 und Rb2ZrTe3 Complex Chalcogenides of the IVa Metals with Low Dimensional Anionic Partial Structures. Preparation and Crystal Structures of K2ZrTe3 and Rb2ZrTe3  
 Abstract    The isostructural compounds K2ZrTe3 and Rb2ZrTe3 were obtained at 1000°C by reacting K7Te and Rb9Te with stoichiometric amounts of Zr and Te. The compounds are monoclinic, mP24, space group P2,/c, Z = 4 with a = 9.089(3), b = 14.148(4), c = 6.986(3)Ä, ß = 105.90(1)° and a = 9.735(4), b = 14.300(7), c = 6.952(8) Ä, ß = 108.61(2)°, respectively. The crystal structure was determined from diffractometer data and refined to R = 0.030 for 1452 Fo's for K2ZrTe3 and R = 0.038 for 1131 Fo's for Rb2ZrTe3. The crystal structure is of a new type, characterized by infinite anionic chains, ^-[ZrTe3]2_ built up by octahedra sharing opposite faces which run along [001]. The mean Zr-Te bond lengths are 2.921 and 2.920 A, respectively. The alkali cations separating the chains are characterized by two different -distorted octahedral and pentagonal bipyramidal -chalcogen environments. E inleitung 
  Reference    Z. Naturforsch. 54b, 441 (1999); eingegangen am 9. November 1998 
  Published    1999 
  Keywords    Crystal Structure, Complex Chalcogenides, Tellurides, Zirconium, Pseudo-one-dimensional solids 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0441.pdf 
 Identifier    ZNB-1999-54b-0441 
 Volume    54