%0 Journal Article %J Nature Materials %D 2011 %T Large variation of vacancy formation energies in the surface of crystalline ice %A M. Watkins %A D. Pan %A E.G. Wang %A A. Michaelides %A J. Vandevondele %A B. Slater %B Nature Materials %P 794-798 %G eng %U http://www.ncbi.nlm.nih.gov/pubmed/21892176 %N 10 %] 000295155200017 %R 10.1038/nmat3096