Crystal structure refinement at high pressures using angle-dispersive powder diffraction techniques |
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| Authors: | P D Hatton M I McMahon R O Piltz J Crain R J Nelmes |
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| Institution: | Department of Physics , The University of Edinburgh , EH9 3JZ, Mayfield Road, Edinburgh, Scotland, U.K. |
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| Abstract: | Abstract The development of area detectors such as the imaging plate (IP) allows the use of angle-dispersive techniques for powder diffraction studies at high pressure. Integration of the 2-d pattern greatly improves the powder averaging and signal-to-noise ratio, making it possible to carry out full Rietveld refinements of crystal structures in high-pressure phases. An IP system is being developed at the Synchrotron Radiation Source (SRS), Daresbury, and the current status of this system -hardware and software -is described. Recent results on La2CuO4 and lnSb demonstrate the effectiveness and advantages of the techniques. |
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