Urea Worsham J, Levy H, Peterson S Acta Crystallographica 10 (1957) 319-323 The positions of hydrogen atoms in urea by neutron diffraction _cod_database_code 1008776 _database_code_amcsd 0016652 5.661 5.661 4.712 90 90 90 P-42_1m atom x y z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) C1 0 .5 .333 2.35 2.35 .85 0 0 0 O1 0 .5 .5968 3.74 3.74 .80 0 0 0 N1 .1439 .6439 .1832 4.86 4.86 1.39 0 -.07 -.07 H1 .2522 .7522 .2839 6.33 6.33 3.54 0 -.34 -.34 H2 .1365 .6365 .9724 6.72 6.72 1.82 0 -.23 -.23