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1Author    Petra Lauxmann, Thomas SchleidRequires cookie*
 Title    CsCu3Dy2S5 und CsCu3Er2S5 : Zwei isotype quaternäre Sulfide der Lanthanoide mit Kanalstrukturen CsCu3Dy2S5 and CsCu3Er2S5: Two Isotypic Quaternary Sulfides of the Lanthanides with Channel Structures  
 Abstract    Orthorhombic single crystals of CsCu3 Dy2 S5 (a = 397.54(4), b = 1414.8(1), c = 1685.7(2) pm) and CsCu3 Er2 S5 (a = 394.82(4), b= 1410.9(1), c = 1667.2(2) pm; both Cmcm, Z = 4) are obtained as by-products (pale yellow or pink transparent needles) in attempts to synthesize CuMS2 (M = Dy and Er) through the oxidation of elemental copper, dysprosium and erbium, respectively, with sulfur (molar ratios: 1 :1 :2) in the presence of equimolar amounts of cesium chloride (CsCl) as fluxing agent at 900 °C within fourteen days from torch-sealed evacuated silica tubes. Their crystal structure contains octahedral [MS6]9~ units (d(M-S) = 269 -282 pm) which share edges and vertices to form layers ^ {(M 2 S5)4_} parallel (010). These are three-dimensional-ly interconnected along [010] by two crystallographically different Cu+ cations in tetrahedral coordination of S2_ anions (d(Cu-S) = 227 -269 pm) according to ^{(Cu^MtSs)-}. Thereby a likewise layered substructure 2,{(Cu3 S5)7 -} is formed parallel (010) by edge-and vertex-linking of all [CuS4]7~ tetrahedra. Large channels within the <£>{(Cu3 M2 S5)~ } network spread along [100] and suit well to take up the highly coordinated Cs+ cations, which are surrounded by eight plus one S2~ anions at distances between 340 and 358 pm (8 x) with the ninth ligand 420 -421 pm apart in the shape of (2+7)-fold capped trigonal prisms. 
  Reference    Z. Naturforsch. 56b, 1149—1154 (2001); eingegangen am 27. August 2001 
  Published    2001 
  Keywords    Copper, Lanthanides, Sulfides 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1149.pdf 
 Identifier    ZNB-2001-56b-1149 
 Volume    56 
2Author    A. Simon, Hj Mattausch, N. B. Mikheev, C. KellerRequires cookie*
 Title    Zum Einbau von einigen Lanthaniden in Gd 2 Cl 3 Incorporation of Some Lanthanides into Gd 2 Cl 3  
 Abstract    Co-crystallization experiments with radioactive isotopes of lanthanides (Ce, Nd, Eu, Gd, Tb, Dy, Tm, Yb) show that only Tb is incorporated by Gd 2 Cl 3 in a significant amount. The results are discussed in terms of the electronic configuration of Ln 2 ^ ions as well as redox potentials E°(Ln 3+ /Ln 2+). 
  Reference    Z. Naturforsch. 42b, 666—668 (1987); eingegangen am 9. Januar 1987 
  Published    1987 
  Keywords    Lanthanides, Co-Crystallization, Radioactive Isotopes 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0666.pdf 
 Identifier    ZNB-1987-42b-0666 
 Volume    42 
3Author    Z. NaturforschRequires cookie*
 Title    A -P r 2S3, D -H o2S3 und E -Y b 2S3: Synthese und Einkristallstrukturuntersuchungen  
 Abstract    The oxidation of reduced chlorides (MC12) or chloride-hydrides (MC1HV) of the lanthani­ des with sulfur (700-850 °C, 7 d, sealed tantalum capsules or evacuated silica vessels) usually results in the formation of the sesquisulfides M2S3 as the main products. In the presence of appropriate fluxes (e.g., alkali halides), the products often are obtained as single crystals, and the flux decides which modification is favoured. Ternary halides of the trivalent lanthanides with the corresponding alkali metal can mostly be found as the second components. Crystal growth and structural investigations of thus produced single crystals of Pr2S3 (from PrClH() 67 + S + NaCl, 5:5:1, A type: orthorhombic, Pnma (No. 62), Z = 4, a = 748.22(5), b = 405.51(3), c = 1560.74(9) pm, R = 0.024, Rw = 0.020), Ho^S, (from U -H o^S , + KI, 1:1, D type: mono­ clinic, P 2xim (No. 12), Z = 6, a = 1746.15(9), b = 400.23(3), c = 1012.43(6) pm, ß = 98.529(4)°, R = 0.041, Rw = 0.035), and YbiS3 (from T-Yb^S^ + KI, 1:1, E type: trigonal, R 3c (No. 167), Z = 6, a = 674.97(2), c = 1820.11(9) pm'. R = 0.019, Rw = 0.018) are reported here. In accordance with the lanthanide contraction, the trivalent cations (M3+) exhibit sulfur coordination numbers of 7 and 8 in A -P r 2S3, 6 and 7 in D -H o 2S3, and 6 in E -Y b 2S3 (corundum-type structure). 
  Reference    Z. Naturforsch. 51b, 733—738 (1996); eingegangen am 4. Oktober 1994 
  Published    1996 
  Keywords    Lanthanides, Sesquisulfides, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0733.pdf 
 Identifier    ZNB-1996-51b-0733 
 Volume    51 
4Author    Thom As Schleid, Falk LissnerRequires cookie*
 Title    Oxidsulfidchloride der Lanthanide vom Typ M 4OS4Cl2 (M = L a-N d ) M 4OS4Cl2-Type Oxysulfide Chlorides of the Lanthanides (M = L a -N d )  
 Abstract    Oxysulfide chlorides, M4OS4Cl2, o f the lanthanides (M = L a -N d) are obtained upon the oxi­ dation o f the metals with sulfur in the presence o f MOC1 (or M 20 3) and MC13 in appropriate molar ratios. Additional NaCl or an excess o f MC13 serving as a flux provide even single crys­ talline material after reactions at 850 °C for seven days in sealed tantalum capsules. The crys­ tal structure o f M4OS4Cl2 (hexagonal, P 6 3mc, no. 186, Z = 2; M = La: a = 933.19(3), c = 701.22(4) pm, c/a = 0.7514, R = RH = 0.020; M = Ce: a = 925.49(3), c = 694.13(3) pm, c/a = 0.7500; M = Pr: a = 919.72(4), c = 688.53(4) pm, c/a = 0.7486; M = Nd: a = 914.25(4), c = 683.12(4) pm, c/a = 0.7472, R = 0.022, Rw = 0.019) contains isolated 0 2--centered (M 3+)4 te-trahedra which are surrounded by twelve S2-and six Cl-, capping vertices, edges, and faces o f each tetrahedron and linking to other [OM4] units. Basically, the structure is identical to that o f Ba4OCl6 if Ba2+ is substituted by M 3+ and 2/3 o f the CL anions are replaced by S2-to secure charge neutrality in M4OS4Cl2. Different models for the C L /S 2-replacement are presented on the basis o f comparisons o f the Madelung part o f the lattice energy (M A PLE) with the M APLE sum o f the binaries (M 20 3, M 2S3, and MC13). 
  Reference    Z. Naturforsch. 49b, 340 (1994); eingegangen am 27. September 1993 
  Published    1994 
  Keywords    Lanthanides, Oxysulfide Chlorides, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0340.pdf 
 Identifier    ZNB-1994-49b-0340 
 Volume    49