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    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1351-1356 
    ISSN: 0044-2313
    Keywords: Silicate-chloride ; crystal structure ; europium ; lithium ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Two New Silicate-Chlorides with Divalent Europium: LiEu3[SiO4]Cl3 and Li7Eu8[SiO4]4Cl7LiEu3[SiO4]Cl3 was prepared by reaction of LiCl with Eu2SiO4 and Li7Eu8[SiO4]4Cl7 from Li with Eu2O3, SiO2 and LiCl. The crystal structures of LiEu3[SiO4]Cl3 (Pmna, a = 946.95(13); b = 699.52(8); c = 1 368.0(2) pm; Z = 4; R1 = 0.0325, R2w = 0.0642) and Li7Eu8[SiO4]4Cl7 (P21/c; a = 851.85(5); b = 948.62(7); c = 1 679.0(2) pm; β = 96.221(8)°; Z = 2; R1 = 0.0352, R2w = 0.0744) were determined from four-circle diffractometer data. LiEu3[SiO4]Cl3 contains [Li(SiO4)2] units and LiCl6 octahedra while in Li7Eu8[SiO4]4Cl7 larger „lithosilicate“ groups are found. In both structures, the Eu2+ ions are coordinated mostly eightfold by O2- and Cl- ligands.
    Notes: LiEu3[SiO4]Cl3 wurde durch Umsetzung von LiCl mit Eu2SiO4 dargestellt, Li7Eu8[SiO4]4Cl7 durch Umsetzung von Li mit Eu2O3, SiO2 und LiCl. Die Kristallstrukturen von LiEu3[SiO4]Cl3 (Pmna, a = 946,95(13); b = 699,52(8); c = 1 368,0(2) pm; Z = 4; R1 = 0,0325, R2w = 0,0642) und Li7Eu8[SiO4]4Cl7 (P21/c; a = 851,85(5); b = 948,62(7); c = 1 679,0(2) pm; β = 96,221(8)°; Z = 2; R1 = 0,0352, R2w = 0,0744) wurden aus Einkristall-Vierkreisdiffraktometer-Daten bestimmt. LiEu3[SiO4]Cl3 enthält [Li(SiO4)2]-Einheiten neben LiCl6-Oktaedern, während in Li7Eu8[SiO4]4Cl7 größere „Lithosilicat“-Baugruppen vorliegen. Die Eu2+-Ionen sind in beiden Strukturen meist achtfach von O2-- und Cl--Liganden koordiniert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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