PREPARATION, STRUCTURE, AND ION-EXCHANGE PROPERTIES OF NA4TI9O20.XH2O
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A sodium titanate, Na4Ti9O14 xH2O, was synthesized at low temperatures (90-280C) by a reaction of either anatase or titanium isopropoxide with NaOH. Na4Ti9O20 xH2O is a layered compound with an interlayer distance of 6.9 in the anhydrous form, 8.6 in the metastable "semihydrous" form, and 10.0 in the fully hydrated form. Regardless of its hydration state, this sodium titanate has an ion-exchange capacity of 4.74 meq/g of Na4Ti9O20, and all the Na+ ions are exchangeable. When heated to 700C, Na4Ti9O20 xH2O decomposes to a mixture of Na2Ti3O7 and Na2Ti6O13. 1988.
JOURNAL OF SOLID STATE CHEMISTRY
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CLEARFIELD, A., & LEHTO, J.
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