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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 593-596 
    ISSN: 0044-2313
    Keywords: Reduced halides ; synthesis ; crystal structure ; europium ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: NaEu2Cl6 and Na0.75Eu2Cl6: Mixed Valent Chlorides of Europium with SodiumThe reaction of Na2EuCl5 with Eu metal in sealed gold tubes yields blue single crystals of NaEu2Cl6. It crystallizes with the hexagonal crystal system (space group P63/m) with a = 755.74(8) pm, c = 429.81(5) pm, Z = 1; the structure is closely related to the UCl3-type. Green single crystals of Na0.75Eu2Cl6 were first obtained as a by-product in the synthesis of Na2EuCl5 in evacuated silica tubes and may be prepared by reduction of EuCl3 with sodium. Na0.75Eu2Cl6 crystallizes isotypic to NaEu2Cl6 with a = 753.69(11) pm and c = 416.3(2) pm.
    Notes: Die Umsetzung von Na2EuCl5 mit Eu-Metall in Goldampullen führt zu blauen Einkristallen von NaEu2Cl6, einem Derivat des UCl3-Typs: Hexagonal, Raumgruppe P63/m, a = 755,74(8) pm, c = 429,81(5) pm, Z = 1. Grüne Einkristalle von Na0,75Eu2Cl6 wurden erstmals als Nebenprodukt bei der Synthese von Na2EuCl5 in evakuierten Quarzglasampullen erhalten, können jedoch auch durch gezielte Reduktion von EuCl3 mit Natrium gewonnen werden. Na0,75Eu2Cl6 ist isotyp mit NaEu2Cl6 mit a = 753,69(11) pm und c = 416,3(2) pm.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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