The above study shows that: "Mt. [montmorillonite] exhibits the highest adsorption and regeneration efficiencies of La3+ and Yb3+ whereas Kao [kaolinite] displays the highest extraction efficiencies for both REE. 89% for La3+ and 85% for Yb3+ were achieved from Kao [kaolinite] while the lowest extractions rate were obtained from Ms. [muscovite]"
Fine-resolution multiscale mapping of clay minerals in Australian soils measured with near infrared spectra: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2011JF001977
Ann: Bonanza Rare Earth Drill Results - Merivale South, page-320
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