Experimental Research on the Impact of Ion Exchange and Infiltration on the Microstructure of Rare Earth Orebody

Figure 12

Phase of (NH₄)₂SO₄ solution (2.5%). (a) 7 h, (b) 8 h, (c) 9 h, (d) 10 h, (e) 11 h, and (f) 12 h.

(a)

(b)

(c)

(d)

(e)

(f)