Come on dude, even the most cursory of investigations would surely have drawn you to the wiki page on ice:
http://en.wikipedia.org/wiki/Ice#Ice_at_different_pressures
Admittedly, the wiki is of dubious evidentiary value. If you need a more rigorous analysis, try this one:
http://www.springerlink.com/content/v0g5505076064208/
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