Über Oxocuprate, XX Ein Erdalkalioxocuprat(II) mit geschlossenen Baugruppen: BaCuO₂ / About Oxocuprates, XX Alkaline-earth Oxocuprate(II) with Closed Structural Groups : BaCuO₂

Abstract

The new alkaline-earth oxocuprate(II) BaCuO 2 was prepared and investigated by single crystal X-ray methods. (Space group : O h 9 -Im 3 m, lattice constant: a = 1827 pm.) The distribution of 360 atoms per unit cell leads to a complicated polyhedral framework with Cu 2+ in well known square coordination. One of the Ba 2+ positions has the extraordinary coordination number 24.