Hydrogen
      Ishmaev S N, Sadikov I P, Chernyshev A A, Vindryevsky B A, Sukhoparov V A,
      Telepnev A S, Kobelyev G V
      Zhurnal Eksperimental'noi i Teoreticheskoi Fiziki 84 (1983) 394-403
      Neutron structural investigations of solid para-hydrogen at pressures
      up to 24 kbar
      Locality: synthetic
      Sample: at P = .00235 GPa & T = 4.2 K
      Note: known as para-hydrogen
      _database_code_amcsd 0015876

      CELL PARAMETERS:    3.7610   3.7610   6.1540   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     75.387
      Density (g/cm3):      0.089
      MAX. ABS. INTENSITY / VOLUME**2:     0.9223414660E-01
      RIR:      0.338
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                27.38         56.83        3.2571    1   0   0         6
                31.07        100.00        2.8788    1   0   1        12
                48.40         14.85        1.8805    1   1   0         6
                52.74          7.17        1.7358    1   0   3        12
                56.51          1.44        1.6286    2   0   0         6
                58.64          3.33        1.5744    2   0   1        12
                60.14          1.28        1.5385    0   0   4         2
                80.69          1.09        1.1908    1   1   4        12
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       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.