期刊
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
卷 632, 期 8-9, 页码 1487-1490出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/zaac.200600030
关键词
europium; oxide-bromide; crystal structure; mixed-valence compounds
Red single crystals of Eu2O2Br were obtained as a by-product in an attempt to produce large quantities of Eu4OBr6 from a reaction mixture of EuBr2, Eu2O3 and sodium in a 10:1:2 molar ratio. The crystal structure (monoclinic, I2/m (no. 12), Z = 4, a = 955.2(2), b = 403.01(8), c = 1119.0(3)pm, beta = 105.78(3)degrees, R-I(all) = 0.0305) contains {Eu4O} tetrahedra connected to two kinds of chains which combine to corrugated layers [Eu2O2](+) and sheathe likewise corrugated layers of Br- ions.
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