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The First Mixed‐Valent Europium(II,III) Oxide Bromide: Eu 2 O 2 Br
Author(s) -
Hammerich Stefanie,
Pantenburg Ingo,
Meyer Gerd
Publication year - 2006
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200600030
Subject(s) - europium , monoclinic crystal system , crystallography , ion , molar ratio , tetrahedron , oxide , chemistry , crystal structure , materials science , inorganic chemistry , catalysis , organic chemistry
Red single crystals of Eu 2 O 2 Br were obtained as a by‐product in an attempt to produce large quantities of Eu 4 OBr 6 from a reaction mixture of EuBr 2 , Eu 2 O 3 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, β = 105.78(3)°, R 1 (all) = 0.0305) contains {Eu 4 O} tetrahedra connected to two kinds of chains which combine to corrugated layers [Eu 2 O 2 ] + and sheathe likewise corrugated layers of Br − ions.