Synthesis of Analcime Crystals and Simultaneous Potassium Extraction from Natrolite Syenite

Figure 9

SEM images of samples collected at different crystallization time: (a) 1 h, (b) 2 h, (c) 3 h, (d) 3 h, (e) 4 h, and (f) 5 h.

(a)

(b)

(c)

(d)

(e)

(f)