The extracted rare earth oxides (REOs) using the ion-adsorption process from ion-adsorption clays in Southern China are typically used in the manufacturing of high-performance magnets, catalysts, alloys, glasses, and electronics due to their unique magnetic, chemical, and luminescent properties. These applications are crucial in various high-tech industries, including renewable energy technology, aerospace, electronics, and automotive fields. Users of this dataset should note that the system boundary is limited to the production of mixed REOs with a purity of 90-92% and does not include downstream processes such as solvent extraction and metal production. Allocation of impacts in multi-product systems is based on economic factors. For accurate LCA results, ensure that the boundaries of the analysis match those of the intended application. Should the LCA study require further divisions of REEs, this dataset may require modification or complementing with additional data. Due to differences in site-specific practices, the represented data should be used cautiously and possibly adjusted for regional and technological differences when applied to specific scenarios.