The hollandite-related structure of Ba2Ti9O20 |
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| Authors: | G. Grzinic L.A. Bursill David J. Smith |
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| Affiliation: | School of Physics, University of Melbourne, Parkville, 3052, Victoria, Australia;High Resolution Electron Microscope, University of Cambridge, Free School Lane, Cambridge CB2 3RQ, England |
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| Abstract: | The crystal structure of Ba2Ti9O20 has been determined by comparison of experimental high-resolution electron micrographs with images simulated using structural models deduced from the micrographs in conjunction with crystallochemical principles. The structure consists of lamellae of hollandite-type structure alternating with BaTiO3-like units, which effectively immobilize the Ba ions. This material should be relatively more leach resistant to attack by aqueous sodium chloride solutions. The structure determination clarifies the observation that this material has unique properties as a microwave resonator, compared with other barium and alkali titanate structures. |
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| Keywords: | To whom correspondence should be addressed. |
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