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A precipitated silica, produced as a waste product from the Wairakei geothermal field and power station in the central North Island of New Zealand, has been found to be active in the hydrothermal synthesis of a range of zeolite molecular sieves of various structure types: Sodalite (SOD), Linde type A (LTA), Linde type Y (FAU), Mordenite (MOR), ZSM-5 (MFI) and Beta (*BEA). The natural silica reagent...
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