Preparation, structure, and ion-exchange properties of Na4Ti9O20 · xH2O Academic Article uri icon


  • A sodium titanate, Na4Ti9O14 · xH2O, was synthesized at low temperatures (90-280°C) by a reaction of either anatase or titanium isopropoxide with NaOH. Na4Ti9O20 · xH2O is a layered compound with an interlayer distance of 6.9 Å in the anhydrous form, ≈8.6 Å in the metastable "semihydrous" form, and 10.0 Å 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 700°C, Na4Ti9O20 · xH2O decomposes to a mixture of Na2Ti3O7 and Na2Ti6O13. © 1988.

altmetric score

  • 6

author list (cited authors)

  • Clearfield, A., & Lehto, J.

citation count

  • 76

publication date

  • March 1988