ALKALINE AND TERROUS-ALKALINE TRANSITION METAL OXIDE MICRO- AND SUBMICRO-MATERIALS, AND HYDROTHERMI

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This invention provides micro and submicro materials of metal transition oxides from crystalline structure and CaFe2O4 formula RxFexTi2-xO4, where R is an alkali or alkaline-earth. The materials of the invention, alkali and alkaline-earth metal transition oxides submicro and micro materials, are useful in various applications. It is also provided a low-cost process for the obtainment of micro and submicromaterials through an hydrothermal treatment of raw materials as mineral sands.