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'Ternary Chalcogenides' in keywords Facet   Publication Year 1986  [X]
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1Author    KurtO. KleppRequires cookie*
 Title    Darstellung und Kristallstruktur von TI3AgTe2 Preparation and Crystal Structure of Tl3A gTe2  
 Abstract    The new compound Tl3A gTe2 was prepared by the reaction of Tl5T e3, Ag and Te at 550 °C, followed by slow cooling of the melt. It forms black crystals of metallic lustre which decompose by the influence of humidity. Tl3A gTe2 is monoclinic, space group P2,/c, with a = 11.020(5), b = 7.427(2), c = 9.888(3) Ä , ß — 116.62(4)°, Z = 4. The crystal structure was determ ined from four-circle diffractom eter data and refined to a conventional R of 0.083 for 1015 observed reflec­ tions. Tl3AgTe2 crystallizes with a new structure type, characterized by infinite layers, 2[A gT e2], running along (100), which are separated from each oth er by thallium atom s. The layers are built up by pairs of edge sharing A gTe4-tetrahedra linked together by common Te atoms according to |[A g (T e)T e 3/3]. The crystal structure is based on an arrangem ent of distorted c.p. tellurium layers, stacked along [010] (stacking sequence h2). All octahedral voids are occupied by Tl-atoms, Ag-and Tl-atoms are regularly distributed over the tetrahedral sites. 
  Reference    Z. Naturforsch. 41b, 941 (1986); eingegangen am 17. März 1986 
  Published    1986 
  Keywords    Ternary Chalcogenides, Thallium Silver Telluride, Crystal Structure, Preparation 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-0941.pdf 
 Identifier    ZNB-1986-41b-0941 
 Volume    41