Synthesis of anhydrous K2TiOF4 via a mild hydrothermal method

Synthesis of anhydrous K2TiOF4 has been previously attempted by transforming precursor compounds such as the peroxide (K2Ti(O2)F4), hydrate (K2TiOF4·H2O) and fluoride (K2TiF6). Due to the large structural differences between these precursors and the anhydrous oxyfluorides, these preparations have been unsuccessful. Therefore, a direct method of synthesis has been employed to grow single crystals of K2TiOF4 that were characterized by single crystal X-ray diffraction.