Structural Investigation of the Incommensurate Modulated Ta2O5⋅Al2O3 System
The (1−x)Ta2O5⋅xAl2O3 solid solution series was re-investigated using synchrotron X-ray powder diffraction and neutron powder diffraction data. Structures were refined using the Rietveld method and an incommensurately modulated composite structure approach in superspace group Xmmm(0β0)s00 with a composition dependent modulation wave vector. Variable temperature synchrotron X-ray powder diffraction data were collected between 27 and 990 ∘C. The magnitude of the modulation wave vector was found to be constant over most of the temperature range.
KeywordsNeutron Powder Diffraction Neutron Diffraction Data Main Reflection Solid Solution Range Incommensurate Structure
A part of this work was carried out on the powder diffraction beamline at the Australian Synchrotron, Victoria, Australia, and the authors would like to thank Dr Qinfen Gu for his assistance. Neutron data were collected at ANSTO and the authors thank Dr James Hester for his assistance.
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