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Figure 3
Strain effects in ice-VII at 13 GPa. (a) A diffraction image of ice-VII crystallized from melt at 12.6 GPa. Ice is the only phase in the sample chamber. Melting was induced by CO2-laser heating and the crystallization occurred upon rapid closure of the laser shutter. (b) The same sample after increasing the pressure by 3 GPa but before further annealing. The fine spots dominating the image in (a) are smeared out while peak widths increase. (c) The two patterns after correction for angular distortion. Clearly the Debye fringes in the sample after pressure increase without annealing (lower panel) are broader than those of the heat-treated sample (upper panel) and show ellipticity from anisotropic strain (see text).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 12| Part 5| August 2005| Pages 626-631
doi:10.1107/S0909049505023575
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