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Mineral Liberation Analysis (MLA)-Based Characterization of Lithium Source: Biotite and Associated Minerals in Nepheline Syenites
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Mineral Liberation Analysis (MLA)-Based Characterization of Lithium Source: Biotite and Associated Minerals in Nepheline Syenites
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Journal Article
Mineral Liberation Analysis (MLA)-Based Characterization of Lithium Source: Biotite and Associated Minerals in Nepheline Syenites
2025
Overview
Due to the rapid advancement of technology, lithium carbonate has become a crucial raw material for battery storage applications. Brines remain the primary source, while lithium carbonate production from ores is limited. Therefore, expanding resources, identifying potential deposits, and characterizing existing sources are essential. Direct lithium detection via MLA is challenging due to its atomic number being below 6; however, it can be indirectly identified through lithium-bearing biotite. This study characterizes lithium-bearing biotite in nepheline syenite ore, considering biotite as the primary lithium source. Analytical methods included MLA, modal mineralogy, XRD, ICP-OES, XRF, SEM-BSE, and EDS. The ore contained 4% biotite, with a liberation degree exceeding 70% in particles finer than 500 µm. Biotite formed binary, ternary, and complex associations with K-feldspar, nepheline, and albite. Finer particle sizes increased biotite liberation while reducing associations; no binary biotite–nepheline associations were detected below 75 µm. EDS spectra confirmed biotite as the sole lithium-bearing mineral.
