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The Effect of Cs On The Structural Properties Of Barium Titanate Hollandites

Published online by Cambridge University Press:  17 March 2011

K.R. Whittle ,
G.R. Lumpkin  and
S.E. Ashbrook
K.R. Whittle
Affiliation:
Cambridge Centre for Ceramic Immobilisation – C3i, Department Of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ, United Kingdom
G.R. Lumpkin
Affiliation:
Cambridge Centre for Ceramic Immobilisation – C3i, Department Of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ, United Kingdom
S.E. Ashbrook
Affiliation:
Cambridge Centre for Ceramic Immobilisation – C3i, Department Of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ, United Kingdom
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Abstract

Hollandite, based on Ba and Ti, has been shown to be an ideal medium by which active 135Cs and 137Cs can be immobilised. Diffraction measurements have shown that Cs modifies the symmetry of the material, from monoclinic to tetragonal. Experiments carried out here show the effects of Cs on two hollandite systems based on Ba-Al-Ti and Ba-Mg-Ti. Structural measurements are reported for neutron diffraction, and MAS NMR. The results show that Cs modifies the overall crystal symmetry while having little effect on the order/disorder of Al-Ti and Mg-Ti octahedra.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 824: Symposium CC – Scientific Basis for Nuclear Waste Management XXVIII , 2004 , CC4.5
Copyright
Copyright © Materials Research Society 2004

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