Zur Kenntnis von K2GeO3

On K₂GeO₃ Single crystals of K₂GeO₃ have been prepared by heating K₂O and GeO₂ (K:Ge = 3.0:1.0; Ag-cylinder, 10 d, 700–800°C). The structure has been refined. K₂GeO₃: a = 2302.5(3), b = 3286.3(5), c = 545.2(1) pm; Pbca; R = 13.83%; R_w = 9.60% (different parameters see text). The structure of K₂GeO₃ will be discussed. The Effective Coordination Numbers, ECoN, the Mean Fictive Ionic Radii, MEFIR, and the Madelung Part of Lattic Energy, MAPLE, are calculated.