Figure 2.
XRD pattern of calcined Ge-rich IWW (Si/Ge 3.1) (1), its hydrolyzed forms after treatment with 0.1 m HCl (2) or 12 m HCl (3), and Ge-poor IWW (Si/Ge 6.4) (4) and its hydrolyzed forms after treatment with 0.1 m HCl (5) or 12 m HCl (6).
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