Abstract
Electron backscatter diffraction data from polycrystalline water ice, cycled three times through the 1h to II phase transformation, show that an area equivalent to the original grain size (∼450 μm) now comprises equant 10 μm grains with a non-random crystallographic preferred orientation (CPO). Pole figures show small-circle ring and fence patterns characteristic of CPO development controlled by an orientation relationship during phase transformation. Misorientation analysis shows that one of two orientation relationships can explain the data:<0 0 0 1> 1h /<1 0-1 0> II , {1 0-1 0} 1h /{0 0 0 1} II or <0 0 0 1> 1h /<1 1-2 0> II , {1 0-1 0} 1h /{0 0 0 1} II .
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