Eine Notiz zum A-Typ der Lanthanoidoxide: Über Pr2O3

The A-type of Lanthanoide Oxides: On Pr₂O₃ . “Reductive” thermal decomposition of K₂PrO₃ [Ni-cylinder, semi-open system, 1000°C, 14 d] leads for the first time to light green single crystals of Pr₂O₃. The structure determination [105 symmetry independent hkl, four circle diffractometer Philips PW 1100; MoKα; R = 6.30%, R_w = 5.01%; space group P3m1; Z = 1; a = 385.77(3), c = 601.20(6) pm] verifies the A-type according to the proposed structure by PAULING .