Synthesis, crystal structure and properties of two antimony germanate compounds

Two antimony germanates formulated as [(enH2)2.5][SbGe8O18(OH)4] (1) (en = ethylenediamine) and Sb4Ge3O12 (2) have been solvothermally synthesized and structurally characterized. Compound 1 represents the first organic containing microporous antimony germanate with three-dimensional (3D) channels. Compound 2 is isostructural to the scintillation crystal BGO (Bi4Ge3O12) with 3D inorganic compact structure. The thermal stability of compound 1 and the optical properties of compound 2 have been studied.