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  • Chemistry  (3)
  • Cesium copper(II) fluoride, CsCu2F5
  • IR Spectra
  • Cyano-elpasolites
  • Wiley-Blackwell  (3)
  • 1980-1984  (3)
  • 1975-1979
  • 1984  (1)
  • 1980  (2)
Collection
Keywords
  • Chemistry  (3)
  • Cesium copper(II) fluoride, CsCu2F5
  • IR Spectra
  • Cyano-elpasolites
  • Inorganic Chemistry  (3)
Publisher
  • Wiley-Blackwell  (3)
Years
  • 1980-1984  (3)
  • 1975-1979
Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 467 (1980), S. 187-196 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: X-Ray Studies on Titanium(III) Fluoro Compounds with Pyrochlore-related StructuresThe cubic compounds (a/pm) CsMIITiIIIF6, MII = Mg (1041.6), Ni (1043.9), Zn (1049.8), Co (1051.7), V (1052.6), Fe (1055.3), Mn (1064.9) and CsM0,5ITi1,5IIIF6, MI = K (1074.6), Rb (1080.6) were prepared. They crystallize in the modified pyrochlore structure of the RbNiCrF6 type, which is confirmed once more at single crystals of an oxide fluoride phase CsTi2X6 (X6 between O2F4 and O3F3): Space group Fd3m, a = 1028.8 pm, R = 2.6% (126 independent reflections). Further compounds CsM0,5ITi1,5IIIF6 according to their powder diagrams are orthorhombic (MI = NH4: a = 764.1, b = 767.5, c = 1087.5 pm) or monoclinic (Na: a = 737.0, b = 758.0, c = 1061.8 pm, β = 91.1°, Li: a = 1466, b = 1479, c = 1041 pm, β = 93.3°) with related, but not exactly know structures.
    Notes: Die kubischen verbindungen (a/pm) CsMIITiIIIF6, MII = Mg(1041,6), Ni(1043,9), Zn(1049,8), Co(1051,7), V(1052,6), Fe(1055,3), Mn(1064,9) und CsM0,5ITi1,5IIIF6, MI = K(1074,6), Rb(1080,6) wurden dargestellt. Sie kristallisieren in der modifizierten Pyrochlorstruktur des RbNiCrF6-Types, der an Einkristallen einer Oxidfluoridphase CsTi2X6 (X6 zwischen O2F4 und O3F3) erneut bestätigt wird: Raumgruppe Fd3m, a = 1028,8 pm, R = 2,6% (126 symmetrieunabhängige Reflexe). Weitere Verbindungen CsM0,5ITi1,5IIIF6 sind nach Pulveraufnahmen orthorhombisch (MI = NH4: a = 764,1, b = 767,5, c = 1087,5 pm) bzw. monoklin (Na: a = 737,0, b = 758,0, c = 1061,8 pm, β = 91,1°, Li: a = 1466, b = 1479, c = 1041 pm,β = 93,3°), mit verwandten, aber nicht genauer bekannten Strukturen.
    Additional Material: 5 Tab.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 469 (1980), S. 75-80 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Refinement of the 12L Structure of the Hexagonal-rhombohedral Elpasolite Rb2LiFeF6The single crystal structure determination of the hexagonal Elpasolite Rb2LiFeF6 confirmed (R = 2.4%) the compound to be isotypic to the hexagonal-rhombohedral 12 layer structure of the Cs2NaCrF6 type. The compound crystallizes with a = 588.0(3), c = 2879.0(8) pm (a = 1017.9 pm, α = 33.57°) in space group R3m. The fluorine distances of the two iron atoms differing in distortion of their octahedral coordination are 191.9(3) and 193.6(3) pm, resp. By face-sharing with FeF6 octahedra at one side and edge-sharing at the other, the LiF6 octahedra are strongly deformed, Li—F = 200.8/223.1(13), Li—Fe = 281.0(18) pm. Both rubidium atoms are 12 coordinated, average distance Rb—F = 297.7 pm. The relations of hexagonal-rhombohedral lattice constants to those of a pseudomonoclinic cell, as claimed for some Elpasolites, are pointed out.
    Notes: Die Einkristallstrukturbestimmung an dem hexagonalen Elpasolith Rb2LiFeF6 bestätigte (R = 2,4%) die Isotypie mit der hexagonal-rhomboedrischen 12-Schichtenstruktur des Cs2NaCrF6-Typs. Die Verbindung kristallisiert mit a = 588,0(3), c = 2879,0(8) pm (a = 1017,9 pm, α = 33,57°) in der Raumgruppe R≙m. Die Fluorabstände der beiden mit unterschiedlichem Verzerrungsgrad oktaedrisch koordinierten Eisenatome betragen Fe—F = 191,9(3) bzw. 193,6(3) pm. Durch die Flächenverknüpfung mit FeF6-Oktaedern auf der einen, Eckenverknüpfung auf der anderen Seite sind die LiF6-Oktaeder stark deformiert, Li—F = 200,8/223,1(13), Li—Fe = 281,0(18) pm. Die beiden Rubidiumatome sind 12fach koordiniert, Mittelwert Rb—F = 297,7 pm. Auf die Beziehungen hexagonal-rhomboedrischer Gitterkonstanten zu denen einer pseudomonoklinen Zelle, wie sie für manche Elpasolithe angegeben wurde, wird hingewiesen.
    Additional Material: 2 Ill.
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  • 3
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structures of Caesium-containing Fluorides. VII. Cs6Ni5F16 - a New Compound in the System CsF/NiF2 and its Crystal StructureSingle crystals of a more caesium-containing phase of composition Cs6Ni5F16, forming in the course of solid state CsNiF3 preparation, could be isolated and their structure determined: a = 618.4(1), b = 1. 455.5(2), c = 2145.1(2) pm, space group Cmca, Z = 4, R = 0.030 (1936 independent reflections). The structure contains chains of five face-sharing octahedra, which are connected at their ends via corners to form a zig-zag layer. The Ni—Ni distances within the chains are 264.1 and 270.2 pm, the average Ni—F distance is 202.0 pm. The caesium atoms exhibit 10-, 11-, and 12-coordination. The structural relations to 2L—CsNiF3 and Cs4Ni3F10 are discussed.
    Notes: Eine bei der Darstellung von CsNiF3 durch Festkörperreaktion auftretende caesiumreichere Phase der Zusammensetzung Cs6Ni5F16 konnte in Form von Einkristallen isoliert und röntgenographisch ihre Struktur bestimmt werden: a = 618,4(1), b = 1455,5(2), c = 2145,1(2) pm, Raumgruppe Cmca, Z = 4, R = 0,030 für 1936 unabhängige Reflexe. Die Struktur enthält Ketten von fünf flächenverknüpften Oktaedern, die an ihren Enden über Ecken zu einer gewellten Schicht verbunden sind. Die Ni—Ni-Abstände in den Ketten betragen 264,1 und 270,2 pm, der mittlere Ni—F-Abstand 202,0 pm. Für die Caesiumatome werden Koordinationszahlen von 10, 11 und 12 beobachtet. Die strukturellen Beziehungen zu 2L-CsNiF3 und Cs4Ni3F10 werden erläutert.
    Additional Material: 3 Ill.
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