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inorganic compounds
The crystal structures of three alkali tetragermanates A2Ge4O9 (A = Na, K and Rb) are trigonal (space group P
c1). The main building units are a three-membered ring of tetrahedra, oriented within the (001) plane and forming tetrahedral sheets. These sheets are connected to each other by two different regular isolated GeO6 octahedra via corner-sharing to build up a tetrahedral-octahedral framework.
c1). The main building units are a three-membered ring of tetrahedra, oriented within the (001) plane and forming tetrahedral sheets. These sheets are connected to each other by two different regular isolated GeO6 octahedra via corner-sharing to build up a tetrahedral-octahedral framework.
