Optimizing Cs-exchange in titanosilicate with the mineral pharmacosiderite topology: framework substitution of Nb and Ge Academic Article

abstract

• Titanosilicates with complete or partial substitution of Ge or Nb in the framework and having the mineral pharmacosiderite topology were hydrothermally prepared and their ion-exchange properties towards Cs were studied for Ti/Ge/Si, Ti/Si, Nb/Ti/Si and pure Ge phases. The basis for the differences in the ion exchange properties measured as distribution coefficients (Kd) for these materials are detailed via structural characterization using the Rietveld refinement technique on the X-ray powder diffraction data. The differences in affinity towards Cs+ result either from the degree of hydration of the exchanger resulting in different coordination environments or the position of cesium ion in the eight-ring channel. 2004 Elsevier Inc. All rights reserved.

authors

• Clearfield, Abraham

published proceedings

• JOURNAL OF SOLID STATE CHEMISTRY

author list (cited authors)

• Tripathi, A., Medvedev, D. G., Delgado, J., & Clearfield, A.

citation count

• 21

complete list of authors

• Tripathi, A||Medvedev, DG||Delgado, J||Clearfield, A

publication date

• August 2004

publisher

• Elsevier  Publisher

published in

• Journal of Solid State Chemistry  Journal

keywords

• Cesium Ion
• Distribution Constant
• Germanium
• Ion Exchange
• Niobium
• Pharmacosiderite
• Rietveld Analysis
• Selectivity
• Structure
• Titanosilicate

Digital Object Identifier (DOI)

• 10.1016/j.jssc.2004.04.042

start page

• 2903

end page

• 2915

volume

• 177

issue

• 8

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.jssc.2004.04.042