Urea
      Guth H, Heger G, Klein S, Treutmann W, Scheringer C
      Zeitschrift fur Kristallographie 153 (1980) 237-254
      Strukturverfeinerung von harnstoff mit neutronenbeugungsdaten bei
      60, 123, 293 K und X-N- und X-X (1s2)-synthesen bei etwa 100 K
      Sample: T = 293 K
      _database_code_amcsd 0010832

      CELL PARAMETERS:    5.6450   5.6450   4.7040   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    149.898
      Density (g/cm3):      1.330
      MAX. ABS. INTENSITY / VOLUME**2:      9.164705510    
      RIR:      2.243
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.87          1.33        4.7040    0   0   1         2
                22.27        100.00        3.9916    1   1   0         4
                24.63         21.84        3.6138    1   0   1         8
                29.35         25.28        3.0435    1   1   1         4
                31.70          7.15        2.8225    2   0   0         4
                35.56         12.17        2.5245    2   1   0         8
                37.15          9.91        2.4203    2   0   1         8
                38.27          1.38        2.3520    0   0   2         2
                40.56          3.17        2.2244    2   1   1         8
                41.60          4.32        2.1711    1   0   2         8
                44.72          1.28        2.0264    1   1   2         4
                45.45          4.45        1.9958    2   2   0         4
                49.62          4.94        1.8373    2   2   1         4
                52.37          1.78        1.7471    3   0   1         8
                53.23          1.17        1.7209    2   1   2         8
                55.02          5.14        1.6690    3   1   1         8
                70.82          1.09        1.3305    3   3   0         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.