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 CELL PARAMETERS: 5.5700 5.5700 4.6880 90.000 90.000 90.000 SPACE GROUP: P-42_1m X-RAY WAVELENGTH: 1.541838 Cell Volume: 145.445 Density (g/cm3): 1.371 MAX. ABS. INTENSITY / VOLUME**2: 9.785547420 RIR: 2.324 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 22.58 100.00 3.9386 1 1 0 4 24.82 22.14 3.5867 1 0 1 8 29.62 28.37 3.0156 1 1 1 4 32.14 6.51 2.7850 2 0 0 4 36.06 14.84 2.4910 2 1 0 8 37.56 12.37 2.3944 2 0 1 8 38.40 1.55 2.3440 0 0 2 2 41.03 4.86 2.1997 2 1 1 8 41.81 6.44 2.1605 1 0 2 8 45.01 2.03 2.0143 1 1 2 4 46.09 5.85 1.9693 2 2 0 4 50.25 6.59 1.8156 2 2 1 4 51.91 1.03 1.7614 3 1 0 8 53.05 2.92 1.7262 3 0 1 8 53.69 1.63 1.7071 2 1 2 8 55.75 7.71 1.6488 3 1 1 8 61.50 1.17 1.5078 2 2 2 4 61.65 1.63 1.5046 1 0 3 8 70.55 1.78 1.3349 4 0 1 8 71.24 2.35 1.3238 2 1 3 8 71.92 2.29 1.3129 3 3 0 4 76.48 1.52 1.2455 4 2 0 8 82.52 1.72 1.1689 3 1 3 8 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.