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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 592 (1991), S. 93-105 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A “Lithosilicate” with Columnar Units: RbLi5{Li[SiO4]}2In order to prepare RbLi3[SiO4] single crystals of RbLi5{Li[SiO4]}2 have been obtained for the first time by heating of a well ground mixture of the binary oxides RbO0.68, LiO0.5 and SiO2 [Rb:Li:Si = 1.1:3.0:1.0; 600°C; 21 d] in tightly closed Ni tubes. The new “lithosilicate” crystallizes monoclinic (space group C2/m with a = 1563.1(2) pm, b = 635.4(1) pm, c = 776.3(1) pm, β = 90.53(1)°, Guinier-Simon powder data). The crystal structure was determined by four-cycle diffractometer data [Philips PW 1100, 1237 from 1609 Io(hkl), Z = 4, R = 9.2%, Rw = 8.3%], parameters see text. The Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN, these via Mean Fictive Ionic Radii, MEFIR, have been calculated.
    Notes: Bei dem Versuch, RbLi3[SiO4] darzustellen, entstanden erstmals Einkristalle von RbLi5{Li[SiO4]}2 durch Tempern inniger Gemenge der binären Oxide RbO0,68, LiO0,5 und SiO2 [Rb:Li:Si = 1,1:3,0:1,0; 600°C; 21 d] in fest verschlossenen Ni-Bömbchen. Das neue „Lithosilicat“ kristallisiert monoklin (Raumgruppe C2/m mit a = 1563,1(2) pm, b = 635,4(1) pm, c = 776,3(1) pm, β = 90,53(1)°, Guinier-Simon-Daten). Die Kristallstruktur wurde mittels Vierkreisdiffraktometerdaten aufgeklärt [Philips PW 1100, 1237 von 1609 Io(hkl), Z = 4, R = 9,2%, Rw = 8,3%], Parameter siehe Text. Der Madelunganteil der Gitterenergie, MAPLE, sowie Effektive Koordinationszahlen, ECoN, diese über Mittlere Fiktive Ionenradien, MEFIR, wurden berechnet.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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