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1Author    M. Arkus Brylak, Wolfgang JeitschkoRequires cookie*
 Title    U3TiSb5, U3VSb5, U3CrSb5, and U3MnSb5 with "Anti"-Hf5Sn3Cu Type Structure  
 Abstract    The title compounds have been prepared from the elem ental com ponents by arc-melting and subsequent annealing. Single crystals of U 3TiSb5 and U 3M nSb5 were obtained from a tin flux and their structures were determined from single-crystal X-ray data: P 63/mcm, Z = 2; a = 913.9(2), c = 611.2(1) pm, R = 0.011 (233 structure factors, 14 variables) for U 3TiSb5 and a = 916.8(2), c = 613.2(1) pm, R = 0.015 (427 structure factors, 14 variables) for U 3MnSb5. The lattice constants of the isotypic compounds are: a -908.2(2), c = 608.3(2) pm for U 3VSb5 and a -911.0(1), c = 611.5(1) pm for U^CrSb^. The structure of these antimonides may be regarded as an "anti"-type structure of Hf5Sn3Cu with the antimony atoms on the hafnium sites, while the positions of the uranium and transition metal atoms correspond to the posi­ tions of the tin and copper atoms. A comparison o f the interatomic distances of UVTiSbs with those of U 3Sb4, USb2, and a-antimony suggests oxidation numbers according to (U +III)3Ti+,v(S b l_III)3(S b 2_,I)2, where the Sb2 atoms form weakly bonded chains. 
  Reference    Z. Naturforsch. 49b, 747—752 (1994); received D ecem ber 16 1993 
  Published    1994 
  Keywords    Lattice Constants, Antimonides, X-Ray 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0747.pdf 
 Identifier    ZNB-1994-49b-0747 
 Volume    49 
2Author    J. K. Omac, StefanRequires cookie*
 Abstract    The reactions of uranium oxysulphide with selected oxysulphides of rare earths (La, Gd, Yb) and Y were investigated. Several new phases, identified as uranium-rare earth oxysulphides were found. The chemical compositions and lattice constants of those compounds were determined. 
  Reference    (Z. Naturforsch. 30b, 79—80 [1975]; received October 2 1974) 
  Published    1975 
  Keywords    Uranium, Rare Earth Oxysulphides, Chemical Compositions, Lattice Constants 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0079.pdf 
 Identifier    ZNB-1975-30b-0079 
 Volume    30 
3Author    W.-D Griebler, D. BabelRequires cookie*
 Title    Röntgenograpliische und magnetische Untersuchungen an perowskitverwandten Cyanoverbindungen CsM ,I M III (CN)6 X-Ray and Magnetic Studies of Perovskite-Related Cyano Compounds CsM II M TII (CN)6  
 Abstract    The perovskite-related cyano compounds CsMnCr(CN)6 (Mn = Mn, Zn), CsZnFe(CN)6 and CsMnCo(CN)6 (Mn = Mn-Cu) are characterized by their IR active C N and Mm-CN stretching frequencies, their lattice constants and their magnetic suscept ibilities (4,2-295 K). Except for CsCuCo(CN)6, which is tetragonally distorted, all compounds crystallize cubically face-centered (with lattice constants in the range from 1020 to 1084 pm). The magnetic behaviour indicates low spin Mm and high spin Mn states, supporting the IR evidence for a strictly ordered Mm—CN—Mn arrangement. The compound CsMnCr(CN)6 is ferrimagnetic, with a Neel temperature of T>j = 90 K and an extrapolated spontaneous magnetization of a = 2,30 //B at 0 K. Superexchange interactions via the cyano bridges are considered responsible for the ferrimagnetism observed. 
  Reference    Z. Naturforsch. 37b, 832—837 (1982); eingegangen am 5. März 1982 
  Published    1982 
  Keywords    Cyano Perovskites, Lattice Constants, Magnetic Susceptibilities, Ferrimagnetism 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0832.pdf 
 Identifier    ZNB-1982-37b-0832 
 Volume    37 
4Author    HansJoachim Berthold, Wolfgang LudwigRequires cookie*
 Title    Thermische Zersetzung nichtstöchiometrischer Cäsium-Silber-Gold(III)-Chloride und Darstellung von Mischkristallen zwischen Cs2AgAuCl6 und Cs2Au T Au rri Cl6 Thermal Decomposition of Nonstoichiometric Cesium-Silver-Gold(III)-Chloride and Preparation of Mixed Crystals of Cs2AgAuCl6 and Cs2Au I Au III Cl6  
 Abstract    The thermal decomposition of cesium-silver-gold(III)-chloride Cs2Agi_2Aui+2:/3CI6 with 0 <x < 0.63 at temperatures between 250 and 350 °C yields, under evolution of chlorine, mixed crystals of Cs2AgAuCl6 and Cs2Au I Au III Cl6. The composition of the latter can be described by the formula Cs2Agi_j,Au1/ I Au III Cl6 with y = 2a;/ (3—x). Apart from the formation of the mixed crystals the reaction leads to CsCl as a further phase, and in the case of x < 0.35 also to some Cs2AgAuCl6. Mixed crystals with 0.23 < y < 1, free from additional solid phases, can be obtained from strong hydrochloric acid solutions of Cs2AgAuCl6 and Cs2Au I Au III Cl6, which contain an excess of cesium ions. The mixed crystals are isostructural with Cs2Au I Au III Cl6 (space group I4/mmm). The variation of the lattice constants with increasing silver content confirms that the univalent silver, in contrast to the univalent gold, shows no tendency toward the formation of linear dichloro complexes. Our investigations show that the "tetragonal modification of Cs2AgAuCle", described by Elliott and Pauling and obtained by them by heat treatment of cubic cesium-silver -gold(III)-chloride, is, in fact, C , S2Agi_2/Au2/ I Au III Cl6. 
  Reference    Z. Naturforsch. 35b, 970—975 (1980); eingegangen am 17. April 1980 
  Published    1980 
  Keywords    Cesium-Silver-Gold(III)-Chloride, Thermal Decomposition, Preparation, Lattice Constants 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0970.pdf 
 Identifier    ZNB-1980-35b-0970 
 Volume    35 
5Author    HansJoachim Berthold, Wolfgang LudwigRequires cookie*
 Title    Präparative und röntgenographische Untersuchungen über Cäsium-Silber-Gold(III)-Chlorid Preparation and X-ray Investigations of Cesium Silver Gold(III) Chloride  
 Abstract    Cesium silver gold(III) chloride has been prepared from hydrochloric acid solutions. The composition of the preparations is variable and depends on the ratio [Au(III)]/[Ag(I)] in solution. It corresponds to the formula Cs2Agi_aAui+a;/3Cl6. In the range 0 < x < 0,64 six crystallographically different phases have been observed. Above x — 0,42 a cubic phase is obtained. The stoichiometric compound Cs2AgAuCl6 is obtained only from solutions with [Au(III)]/[Ag(I)] < 1. Reports in the literature which claim the stoichiometric compound Cs2AgAuCl6 to exist in a cubic and in a tetragonal form cannot be confirmed. Cs2AgAuCl6 crystallizes ortho-rhombically with the lattice constants a = 15,21 A, b= 15,16 A and c= 10,32 A (Z = 8). 
  Reference    Z. Naturforsch. 35b, 651—656 (1980); eingegangen am 7. Februar 1980 
  Published    1980 
  Keywords    Cesium Silver Gold(III) Chloride, Preparation, Chemical Composition, Nonstoichiometric Phases, Lattice Constants 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0651.pdf 
 Identifier    ZNB-1980-35b-0651 
 Volume    35