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Structural phase transitions in brookite-type TiO2 under high pressure
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2005 (English)In: Solid State Communications, ISSN 0038-1098, E-ISSN 1879-2766, Vol. 133, no 1, 49-53 p.Article in journal (Refereed) Published
Abstract [en]

We have studied polycrystalline brookite TiO2 using energy-dispersive X-ray diffraction at pressures up to 27.8 GPa and derived an ambient-pressure bulk modulus of 255 GPa using Birch-Murnaghan's equations of state with a fixed value of 4 as its first derivative. The transition from brookite-type to baddeleyite-type was observed to start at 15.8 GPa and finished at 22.8 GPa. Upon decompression, the alpha-PbO2 structure appeared at 3.5 GPa and the baddeleyite-type structure remained down to 1.6 GPa. the lowest pressure in the present work.

Place, publisher, year, edition, pages
2005. Vol. 133, no 1, 49-53 p.
Keyword [en]
brookite-type TiO2, bulk modulus, structure transition, high pressure, polymorphs, rutile, gpa
URN: urn:nbn:se:kth:diva-14468DOI: 10.1016/j.ssc.2004.09.049ISI: 000226378600008ScopusID: 2-s2.0-10444227400OAI: diva2:332509
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Ahuja, RajeevJohansson, Börje
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Materials Science and EngineeringApplied Material Physics
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