Über Oxocuprate, XXI Bariumoxohalogenocuprate(II) mit Strukturbeziehungen zu BaCuO 2 / About Oxocuprates, XXI Barium Oxohalocuprates(II) with Structure Relationships to BaCuO 2

Attempts to prepare BaCuO 2 single crystals with a flux of BaCl 2 and BaBr 2 respectively lead to new oxohalocuprates(II) : Ba 44 Cu 45 O 87 Cl 4 (A) and Ba 88 Cu 88 O 175 Br 2 (B). Single crystals were investigated by X-ray methods (cubic unit cell: (Α) a = 1827 pm, (B) a = 1830.3 pm, space group O h 9 -lm3m). The complicated crystal structures of both compounds are discussed. There are very interesting relationships to BaCuO 2 .