Methane-hydrate Kirchner M T, Boese R, Billups W E, Norman L R Journal of the American Chemical Society 126 (2004) 9407-9412 Gas hydrate single-crystal structure analyses Sample: (CH4)8(H2O)46, T = 123 K Locality: synthetic _database_code_amcsd 0019155 11.877 11.877 11.877 90 90 90 Pm3n atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) O1 0 .30860 .11683 .0291 .0304 .0287 .0281 0 0 -.0004 H1 0 .325 .051 .50 .044 H2 .051 .271 .134 .50 .044 H3 0 .360 .150 .50 .044 O2 .18345 .18345 .18345 .0286 .0286 .0286 .0286 -.0011 -.0011 -.0011 H4 .216 .216 .216 .50 .043 H5 .162 .128 .220 .50 .043 O3 0 .5 .25 .0292 .0274 .0274 .0328 0 0 0 H6 0 .447 .211 .50 .044 C1 0 0 0 .0518 .0518 .0518 .0518 0 0 0 H7 0 .049 .086 .33 .078 C2 .25 .5 0 .113 .080 .130 .130 0 0 0 H8 .2986 .5 .0687 .50 .170 H9 .2014 .5 .0687 .50 .170