The first antimony borosulfates unveil a modular system MIIIMI[B(SO4)2]4 (MIII=Bi3+, Sb3+, Lu3+; MI=H3O+, NO2+, Li+, Na+, K+, Rb+, Cs+)
- Recently we reported the synthesis and characterization of Bi(H3O)[B(SO4)2]4, at that time representing only the second tectosilicate analogous borosulfate. Inspired by this structure type, we herein present the first modular system within borosulfate chemistry. MIIIMI[B(SO4)2]4 (MIII=Bi3+, Sb3+, Lu3+; MI=H3O+, NO2+, Li+, Na+, K+, Rb+, Cs+) were synthesised under solvothermal conditions and show a large variability towards their mono- and trivalent cation while retaining the same three-dimensional anionic network. Based on their combination, the titled compounds crystallize in the tetragonal space groups Imathematical equation (no. 82), Pmathematical equation (no. 81) and the monoclinic space group C2 (no. 5) all connected via group-subgroup relations. Our initial characterization includes single-crystal as well as powder X-ray diffraction, vibrational spectroscopy and thermal analysis of the new compounds.
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