Die Kristallstruktur des Hexakaliumdigermanats, K6Ge2O7

摘要

The title compound is monoclinic, space group Pc (No. 7),a=6.549 (1),b=9.094 (1),c=11.426 (2) Å, β=126.78 (1)° andZ=2. Its crystal structure has been refined from 1 323 single crystal X-ray reflections toR=0.131. The structure of K6Ge2O7is very similar to that of K6Co2O7and K6Si2O7both of which have been reported to be centrosymmetric, space group P21/c. While the angle at the bridging oxygen atom is 180° in the latter compounds, it is 157° in K6G