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The compound Au 2 (SeO 3 ) 2 (Se 2 O 5 ) was prepared from gold metal and seienic acid at 553 K. The crystal structure [C2/c, a = 2034.4(5), b = 413.0(1), c = 1325.4(3) pm, β = 115.88(3)°, Z = 4] was refined to R = 0.035. Both gold atoms lie on crystallographic centres of symmetry and show square planar coordination (Au-0 196.9-201.3 pm). The extended structure consists of three cross-linked systems of the form [··· -Au-(selenite or diselenite) -Au-···].

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Darstellung und Struktur von Di-gold(III)bis(selenit)(diselenit), Au 2 (SeO 3  ) 2 (Se 2 O 5 )/Preparation and Crystal Structure of Di-gold(III)bis(selenite) Diselenite, Au 2 (SeO 3  ) 2 (Se 2 O 5 )