Die Ba2CuF6-Struktur; Berichtigung und Verfeinerung

The Ba₂CuF₆ Structure; Correction and Refinement The Ba₂CuF₆ structure was redetermined when superstructure reflexes were found. The compound crystallizes in the orthorhombic space group Bbam with a=5.937 Å, b=5.837 Å and c=15.852 Å (Z=4). The principle of the structure is as found before ⁽¹⁾, but the copper coordination is changed decisive. Each copper atom is bonded by six fluorine atoms with the bond length 1.862 Å, 1.867 Å, 2.320 Å (2×), respectively, and has now an stretched octahedral coordination as expected. The difficulties with respect to the interpretation of absorption spectra are now removed.