Defect structures in Ba2Ti9O20: Intergrowths with a "synroc" hollandite phase, BaAl2Ti6O16

A. Pring; D. A. Jefferson; J. M. Thomas

doi:10.1016/0022-4596(84)90258-5

Defect structures in Ba₂Ti₉O₂₀: Intergrowths with a "synroc" hollandite phase, BaAl₂Ti₆O₁₆

A. Pring, D. A. Jefferson, J. M. Thomas

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Abstract

High-resolution electron microscopic studies have revealed variations in the length of the tunnel cavities within Ba₂Ti₉O₂₀, from the normal cavity of length three sites to ones of four and five sites. These elongated cavities can be described in terms of an intergrowth of distorted synroc hollandite BaAl₂Ti₆O₁₆ with Ba₂Ti₉O₂₀. The implications of such intergrowths in the immobilization of radioactive cesium are discussed, and a potential homologous series of phases is predicted.

Original language	English
Pages (from-to)	125-132
Number of pages	8
Journal	Journal of Solid State Chemistry
Volume	55
Issue number	2
DOIs	https://doi.org/10.1016/0022-4596(84)90258-5
Publication status	Published - 15 Nov 1984
Externally published	Yes

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AU - Thomas, J. M.

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AB - High-resolution electron microscopic studies have revealed variations in the length of the tunnel cavities within Ba2Ti9O20, from the normal cavity of length three sites to ones of four and five sites. These elongated cavities can be described in terms of an intergrowth of distorted synroc hollandite BaAl2Ti6O16 with Ba2Ti9O20. The implications of such intergrowths in the immobilization of radioactive cesium are discussed, and a potential homologous series of phases is predicted.

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Defect structures in Ba₂Ti₉O₂₀: Intergrowths with a "synroc" hollandite phase, BaAl₂Ti₆O₁₆

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