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'Phase transitions' in keywords Facet   Publication Year 1994  [X]
Facet   section ZfN Section B  [X]
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1Author    Peter Remmert, Edmund Fischer, Hans-Ulrich HummelRequires cookie*
 Title    Phasenuntersuchungen im System 2 H a -T a S 2-2 H c -M o S 2 Investigations on Phases in the System 2 H a -T a S 2-2 H c -M o S 2  
 Abstract    Ternary phases in the system TaS2-M o S 2 have been obtained by thermal reactions at 1050 °C of binary layered disulfides and N H 4C1 as promotor. Ternary phases Taj_*Mo*S2 exist in the range 0.5 < jc< 0.9. In the range of 0.25 < * < 0.55 the reactions are quantitative and the phase-compositions are determined by the amounts of the starting materials. For x < 0 .2 lT -T a S 2 and for jc> 0.60 2 H c -M o S 2 are contaminating the resulting ternary phases. Ternary phases have been characterized by X-ray powder diffraction and are indexed rhombohedrally on the basis o f a 3 R-structure with metals in trigonal-prismatic coordination. The phases Tal jcMo*S2 with 0.25 < * < 0.55 show a reversible transition of higher order asso­ ciated with a change in the electrical conductivity mechanism. B elow 420 K the phases show semiconductivity while above 460 K metallic conductivity is observed. 
  Reference    Z. Naturforsch. 49b, 1175—1178 (1994); eingegangen am 15. April 1994 
  Published    1994 
  Keywords    Ternary Phases, Preparation, Phase Transition 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1175.pdf 
 Identifier    ZNB-1994-49b-1175 
 Volume    49