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1997 (2)
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1Author    Hans-Jörg Deiseroth, Han Fu-SonRequires cookie*
 Title    Cs6Ga2Se6, ein ternäres Selenogallat(III) mit isolierten [Ga2Se6] 6 --Ionen Cs6Ga2Se6, a Ternary Selenogallate(III) with Isolated [Ga2Se6] 6_ Ions  
 Abstract    Cs6Ga2Se6 can be prepared from mixtures of Cs2Se and Ga2Se3. The transparent single crystals of the moisture sensitive compound (m.p. 685 °C) crystallize in the monoclinic system with a = 848.0(5), b = 1364.4(5), c = 1111.5(5) pm, ß = 126.22(5)° (T = —150 °C, Z — 2, space group P2i/c). The gallium atoms pairwisely occupy selected tetrahedral holes between layers formed by the cesium and selenium ions. This structural principle leads to the formation of double tetrahedral isolated [Ga2Se6] 6-ions. 
  Reference    Z. Naturforsch. 38b, 181—182 (1983); eingegangen am 15. Oktober 1982 
  Published    1983 
  Keywords    Cesium Selenogallate, Crystal Structure, Thermal Properties 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0181.pdf 
 Identifier    ZNB-1983-38b-0181 
 Volume    38 
2Author    Wolfgang SchnickRequires cookie*
 Title    Synthese, Struktur und thermisches Verhalten von Thiophosphorsäuretriamid SP(NH2)3 [1] Synthesis. Structure, and Thermal Behaviour of Phosphorothionic Triamide SP(NH2)3 [1]  
 Abstract    Phosphorothionic triamide SP(NH2) 3 is obtained by slow addition of SPC13 dissolved in dry C H 2C12 to a satured solution of N H , in C H 2C12 at —50 °C. Ammonium chloride is removed from the resulting precipitate by treatment with H N E t2 followed by extraction with C H 2C12. Coarse crystalline SP(NH2) 3 is obtained after recrystallization from dry methanol. The crystal structure of SP(NH2) 3 has been determined by single crystal X-ray methods (Pbca: a — 922.3(1). b = 953.8(1), c = 1058.4(2) pm, Z = 8). In the crystals the molecules show non-crystallographic point symmetry Cs. The P—S bond (195.4(1) pm) is slightly longer than in SPC13. From P—N bond lengths of about 166 pm a significant electrostatic strengthening of the P —N single bonds is assumed. Weak intermolecular hydrogen bonding interactions (N —H • • • N >329.5 pm; N — H • • • S >348.3 pm) are observed. Investigation of thermal properties shows a melting temperature of 115 °C for SP(NH2)3. According to combined DTA/TG and MS investigations above this temperature the compound decomposes by evolution of H 2S and N H , to yield amorphous phosphorus(V)nitride. 
  Reference    Z. Naturforsch. 44b, 942 (1989); eingegangen am 23. März 1989 
  Published    1989 
  Keywords    Phosphorothionic Triamide Synthesis, Structure, Thermal Properties 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-0942.pdf 
 Identifier    ZNB-1989-44b-0942 
 Volume    44 
3Author    W. SchnickRequires cookie*
 Title    Synthesen, Kristallstrukturen und Eigenschaften von Trisilber-und Trikalium-tri-/x-imido-cyclotriphosphat, Ag3(P 0 2NH)3 und K3(P 0 2NH)3 Syntheses, Crystal Structures, and Properties of Trisilver and Tripotassium Tri-^-im ido Cyclotriphosphate, Ag3(P 0 2N H)3 and K3(P 0 2N H)3 N. Stock  
 Abstract    Coarse crystalline Ag3(P 0 2NH)3 (1) and K3(P 0 2NH)3 (2) are obtained by addition of an aqueous solution of A gN 03 to an acidified solution of Na3(P 0 2NH)3 • 4H20 and by diffusion controlled addition of ethanol to a solution of K3(P 0 2NH)3 in water, respectively. The crystal structures of 1 and 2 have been determined by single crystal X-ray methods (Ag3(P 0 2NH)3: P2,/c; a = 1166.6(1), b = 786.4(1), c = 997.8(1) pm, ß = 106.91(1)°; Z = 4. K3(P 0 2NH)3: R3; a = 1271.4(2), c = 1017.9(2) pm, Z = 6). In Ag3(P 0 2NH)3 the cyclic anion is markedly distorted because of interactions between Ag+ and one nitrogen atom of the anion. In K3(P 0 2NH)3 the trimetaphosphimate ring shows a chair conformation and two cyclic anions are connected to each other by hydrogen bonds. DTA/TG investigations show thermal decomposition above 275 and 250 °C for 1 and 2, respectively. 
  Reference    Z. Naturforsch. 52b, 251—255 (1997); eingegangen am 14. November 1996 
  Published    1997 
  Keywords    Trimetaphosphimate, Synthesis, Crystal Structure, Thermal Property 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0251.pdf 
 Identifier    ZNB-1997-52b-0251 
 Volume    52 
4Author    P. Schm, O. Bosholm, H. O. Pperm, AnnRequires cookie*
 Title    Untersuchungen zum ternären System Bi/Te/O, II. Thermisches Verhalten und Koexistenzbeziehungen von Bi20 2Te  
 Abstract    Investigations o f the Ternary System Bi/Te/O, II. The Therm al Behaviour and the R elations o f Phase C oexistences o f B i20 2Te The phase Bi20 2Te exists in the pseudobinary system Bi203/Bi2Te3. The thermal behaviour of Bi2Ö2Te was determined by DTA and X-ray analysis: The phase exists up to 620 °C and decomposes into the solid phases Bi12TeO20, Bi10Te2O 19 [1] and liquid BiTe. The relations of the phase coexistences in the pseudobinary system and in the ternary area Bi20 3/Te02/Bi2Te3/Te were investigated by solid state reactions, chemical transport reactions, and by total pressure measurements. 
  Reference    Z. Naturforsch. 52b, 1461—1466 (1997); eingegangen am 2. Oktober 1997 
  Published    1997 
  Keywords    Synthesis, Thermal Properties, Phase Diagram, Chemical Transport Reactions 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-1461.pdf 
 Identifier    ZNB-1997-52b-1461 
 Volume    52