Role of sodium in carbonatitic melt–fluid evolution and melt-mediated rare earth element mineralization

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The Supplementary Material includes Tables S1-S2 and Figs. S1-S4. Table S1. Elemental compositions of Ca-F phases from representative experimental runs (wt%). Table S2. Mass balance calculations and apparent fluid–melt partition coefficients for Na, Ca, La, and F. Fig. S1. EDS spectra and Raman spectra of fluoride phase, bastnäsite and carbocernaite, respectively. Fig. S2. Backscattered electron images and EDS spectra of britholite (Bri) in run product. Fig. S3. Backscattered electron images and EDS spectra of La-rich patches and carbonatitic melt, respectively, in run product. Fig. S4. (A) Relationship between DNafluid/melt and DLafluid/melt. (B) Relationship between DNafluid/melt and DFfluid/melt.

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