Deciphering the Crystal Structure of a Scarce 1D Polymeric Thorium Peroxo Sulfate

The preparation and structural characterization of an original Th peroxo sulfate dihydrate crystallizing at room temperature in the form of stable 1D polymeric microfibers is described. A combination of laboratory and synchrotron techniques allowed to solve the structure of Th(O2)(SO4)(H2O)2 compound which crystallizes in a new structure type in the Pna21 space group of the orthorhombic system. Particularly, peroxide ligand coordinates Th cations in a scarce μ3–η2:η2:η2 bridging mode forming an infinite 1D chain decorated with sulfato ligands exhibiting simultaneously both monodentate and bidentate coordination modes.