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1Author    Requires cookie*
 Title    Über Oxocuprate, XX Ein Erdalkalioxocuprat(II) mit geschlossenen Baugruppen: BaCu02 About Oxocuprates, X X  
 Abstract    Alkaline-earth Oxocuprate(II) with Closed Structural Groups: B aC u02 R. K ipka und H k. M ü l l e r -B u s c h b a u m In stitu t für Anorganische Chemie der C hristian-A lbrechts-U niversität K iel The new alkaline-earth oxocuprate(II) BaCu0 2 w as prepared and in v estig a ted by single crystal X -ray m ethods. (Space group: 0 ^ -I m 3 m , la ttice con stan t: a = 1827 pm .) The distribution o f 360 atom s per unit cell leads to a com plicated polyhedral fram ework w ith Cu2+ in w ell known square coordination. One of th e B a 2+ positions has th e extraordinary coordination number 24. 
  Reference    (Z. Naturforsch. 32b, 121—123 [1977]; eingegangen am 15. November 1976) 
  Published    1977 
  Keywords    Barium, Copper, O xygen, X -ray, Single crystal 
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 TEI-XML for    default:Reihe_B/32/ZNB-1977-32b-0121.pdf 
 Identifier    ZNB-1977-32b-0121 
 Volume    32 
2Author    H. Pausch, Hk, Müller-BuschbaumRequires cookie*
 Title    Zur Kristallstruktur von SrLaNi04 On the Crystal Structure of SrLaNi04  
 Abstract    Single crystals of SrLaNi04 were prepared with a new high temperature and high oxygen pressure method (C02-Laser radiation). The X-ray investigation shows, that this com-pound belongs to the K2NiF4-type (a — 381.3; c = 1268.7 pm; space group D^-14/mmm), with a stretched octahedral oxygen coordination around Ni 3+ . The octahedral distortion can only be explained by a geometrical effect. 
  Reference    Z. Naturforsch. 34b, 378—379 (1979); eingegangen am 20. November 1978 
  Published    1979 
  Keywords    Single Crystal, X-ray, Jahn-Teller Effect 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0378.pdf 
 Identifier    ZNB-1979-34b-0378 
 Volume    34 
3Author    Hans-Ulrich Kreusler, Achim Förster, Joachim FuchsRequires cookie*
 Title    Die Struktur des Rubidiumtrimolybdathydrats Rb2Mo3O10 * H20 The Structure of the Rubidiumtrimolybdate Hydrate Rb2Mo3Oi0 * H20  
 Abstract    For the first time single crystals of tri-molybdate were obtained through a slow trans-formation of the primary precipitate in a slightly acidified solution of rubidium molybdate at a temperature of 70 °C. A structural analysis of Rb2Mo30io • H20 revealed that the anion forms a chain with a hexameric identity period built up from MoOg octahedra. Each Mo atom is bonded with two terminal oxygen atoms. The anion doesn't contain OH groups. 
  Reference    Z. Naturforsch. 35b, 242—244 (1980); eingegangen am 3. September/8. November 1979 
  Published    1980 
  Keywords    Trimolybdate, Single Crystal, Preparation, X-ray 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0242_n.pdf 
 Identifier    ZNB-1980-35b-0242_n 
 Volume    35 
4Author    Wolfgang Flossmann, Herbert Zehner, Adolf MüllerRequires cookie*
 Title    Radicals Produced in Single Crystals of Thymine Derivatives by UV and X-Rays  
 Abstract    Single crystals o f anhydrous thym ine (T), thym ine monohydrate (T ■ H 20) , 5,6-dihydrothym ine (T H 2), 1-methylthymine (mT) and thym idine (dT) were irradiated with X-rays and UV between 77 K and 300 K. Six types o f radicals were analyzed by ESR-spectroscopy at 9.5 G H z and 35 G H z after exposure to X-rays. The anion radical occurred only in T • H 20 at 77 K, the 4-yl radical only in T H 2 at 77 K and the 1-yl radical only in T between 77 K and 300 K. The 6 -yl radical was found in T, T H 2 and mT. It was converted into the 5-yl radical irreversibly by heat or white light (A < 600 nm). The 5-yl radical appeared in all compounds at room temperature. The highest thermal stability was found for the 7-yl radical which was present at room temperature in all compounds except T H 2 . U V -irradiation (A = 320 nm) produced radicals only in three crystals (T, T H 2 , dT). In T the 5-yl radical was found after exposure at 300 K, and two other radicals, 1-yl and 7-yl, at 77 K. A lso at 77 K, the 7-yl radical was present in dT and the 5-yl radical in TH 2 and dT. 
  Reference    Z. Naturforsch. 35c, 20—2 (1980); received July 23 1979 
  Published    1980 
  Keywords    Radicals, Single Crystals, Thym ine, X-Rays, ESR 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0020.pdf 
 Identifier    ZNC-1980-35c-0020 
 Volume    35 
5Author    R. Zaleski, Z. Jakubas, L. Galewski, SobczykRequires cookie*
 Title      
 Abstract    Dielectric. DSC and preliminary X-ray diffraction studies on [(C2H5)4N]3Sb2Br9 (TEABA) and [(C2H5)4N]3Bi2Br9 (TEABB) are reported. The compounds are isomorphous, space group P6322. The static electric permittivity measurements on single crystals in the temperature range 220 290 K revealed that both compounds show two distinct dielectric anomalies; TEABA at Tcl = 258 K and Tc2 = 252 K, while TEABB at Tcl= 265 K and Tcl = 248 K. The DSC studies show only one anomaly of first order at TcX =258 K for TEABA, and TcX =266 K for TEABB. These transitions are pre­ sumably related to a freezing of the reorientational motion of the tetraethylammonium cations. S tr u c tu r a l P h a s e T ra n s itio n s in |(C 2H 5)4N ] 3S b 2B r 9 a n d |(C 2H 5) 4N |3B i2B r 9 
  Reference    Z. Naturforsch. 44a, 1102 (1989); received May 11 1989 
  Published    1989 
  Keywords    Alkylammonium halogenoantimonates, Bismuthates, Phase transition Dielectric, DSC, Single crystals 
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 TEI-XML for    default:Reihe_A/44/ZNA-1989-44a-1102.pdf 
 Identifier    ZNA-1989-44a-1102 
 Volume    44 
6Author    P. De, La Presa, K. P. Lieb, M. Uhrmacher, L. ZiegelerRequires cookie*
 Title    Perturbed Angular Correlation Studies in SrTi0 3 Single Crystals  
 Abstract    The quadrupole hyperfine interactions of 11 'Cd/ 111 In probe nuclei in single-crystalline SrTi0 3 perovskite samples were investigated using Perturbed Angular Correlation spectroscopy. Three electric field gradients were detected and their fractions and hyperfine parameters were measured in the temperature range from 26 to 700 K. The fraction / 0 having a vanishing quadrupole frequency, as expected for 111 Cd on substitutional sites in a cubic lattice, starts to develop around 300 K and reaches 100% at 700 K. Two well-defined EFG's having closely lying quadrupole frequencies and asymmetry parameters of cj qi = 49.1(3) Mrad/s, 77, = 0.10(2) and u Q2 = 51.8(3) Mrad/s, r] 2 = 0.12(2), at room temperature, were identified in the temperature range from 250 to 530 K, and their (100) orientation in the lattice was determined. They are associated with electronic defects at the probe atoms. 
  Reference    Z. Naturforsch. 55a, 237—241 (2000); received August 24 1999 
  Published    2000 
  Keywords    Perturbed Angular Correlations, SrTi0 3, Single Crystal, Electronic Defects, Perovskite 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0237.pdf 
 Identifier    ZNA-2000-55a-0237 
 Volume    55 
7Author    Alexandra Atzesdorfer, Klaus-Jürgen RangeRequires cookie*
 Title    Sodium Metaperrhenate, N aR e04: High Pressure Synthesis of Single Crystals and Structure Refinement  
 Abstract    Single crystals of sodium metaperrhenate, N a R e 0 4, have been obtained by oxidation of rhe­ nium metal with sodium nitrate under high pres­ sure-high temperature conditions (m odified Belt-type apparatus, 4 kbar, 400 °C, Au-capsules). The crystals are tetragonal, space group 14^0, with a = 5.3654(4), c = 11.732(2) A and Z = 4. The struc­ ture was refined to R -0.026, Rw = 0.013 for 382 unique, absorption-corrected reflections. The scheelite-type structure for N a R e 0 4, pro­ posed by Beintema in 1937, could be confirmed. It consists of isolated R e 0 4 tetrahedra (R e -O = 1.728(2) A), connected by N aO s dodecahedra (< N a -0 > = 2.582(2) Ä). 
  Reference    Z. Naturforsch. 50b, 1417—1418 (1995); received April 24 1995 
  Published    1995 
  Keywords    Sodium Metaperrhenate, Single Crystals, High Pressure Synthesis, Structure Refinem ent 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1417_n.pdf 
 Identifier    ZNB-1995-50b-1417_n 
 Volume    50