Urea Swaminathan S, Craven B M Acta Crystallographica B40 (1984) 300-306 The crystal structure and molecular thermal motion of urea at 12, 60 and 123 K from neutron diffraction Note: neutron data, T = 60 K Locality: synthetic _database_code_amcsd 0020673 5.570 5.570 4.688 90 90 90 P-42_1m atom x y z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) C 0 .5 .3265 .0088 .0047 .0047 -.0001 0 0 H1 .2569 .7569 .2832 .0325 .0325 .0196 -.0170 -.0025 -.0025 H2 .1438 .6438 -.0371 .0331 .0331 .0122 -.0108 .0021 .0021 N .1455 .6455 .1771 .0167 .0167 .0069 -.0084 .0003 .0003 O 0 .5 .5954 .0121 .0039 .0039 .0001 0 0