Ikaite Hesse K F, Kuppers H, Suess E Zeitschrift fur Kristallographie 163 (1983) 227-231 Refinement of the structure of ikaite, CaCO3*6(H2O) Locality: Bransfield Strait, Antarctica _database_code_amcsd 0010853 8.792 8.310 11.021 90 110.53 90 C2/c atom x y z Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Ca .5 .6472 .25 .0148 .0101 .0127 0 .0051 0 C .5 .3055 .25 .0109 .0120 .0171 0 .0031 0 O1 .5 .1515 .25 .0213 .0096 .0325 0 .0048 0 O2 .5262 .3852 .1588 .0197 .0160 .0162 -.0011 .0087 -.0010 O3 .6146 .7222 .0913 .0278 .0196 .0172 -.0044 .0102 -.0010 O4 .7872 .5581 .3829 .0202 .0179 .0172 -.0009 .0063 -.0008 O5 .6707 .8849 .3589 .0177 .0140 .0204 .0001 .0074 .0010 H1 .5795 .6897 .0158 .0404 H2 .6374 .8063 .0905 .0566 H3 .8530 .5959 .3574 .0392 H4 .8105 .5848 .4580 .0330 H5 .7628 .8838 .3567 .0304 H6 .6324 .9668 .3422 .0411