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XRD patterns of magnetic separates from the 2nd set of nitrate-Fe(II) microcosms with Cu K-alpha radiation (λ = 1.5406 Å), both full range and range focused on the magnetite 35.5° diffraction peak, and SEM images. (A)(B)(C) Showing magnetic separates from Day 12.5. (D)(E)(F) Showing magnetic separates from Day 39.5. Quartz – Qz, magnetite – Mgt, and boron nitrite – BN.
