Ice Fortes A D, Wood I G, Grigoriev D, Alfredsson M, Kipfstuhl S, Knight K S, Smith R I Journal of Chemical Physics 120 (2004) 11376-11379 No evidence for large-scale proton ordering in Antarctic ice from powder neutron diffraction Note: T = 100 K Note: known as ice-IH Locality: Kohen Station, Antarctica _database_code_amcsd 0018366 4.497479 4.497479 7.322382 90 90 120 P6_3/mmc atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) O 1/3 2/3 .0614 .0079 .0079 .0060 .0040 0 0 H1 1/3 2/3 .1964 .5 .0211 .0211 .0082 .0106 0 0 H2 .4510 .9019 .0179 .5 .0169 .0124 .0174 .0062 .0037 .0075