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Fig. 4

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Diffractograms of T-RX2 samples in the acid leaching experiment. The original material has a pH of 11.9. Anorthite is observed only in the pH 8.83 curve, reflecting random occurrence of feldspar in the batch material. An: anorthite; Et: ettringite; Hc: hydrocalumite; Bw: brownmillerite; Hg: hydrogarnet; Cr: crocoite; Br: brucite; Ch: chromite; Qz: quartz; Ca: calcite.

Diffractogrammes d’échantillons T-RX2 de l’expérience de traitement acide. Le pH du matériau initial est de 11,9.

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