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 = .00276 GPa & T = 4.2 K
      Note: known as para-hydrogen
      _database_code_amcsd 0015875

      CELL PARAMETERS:    3.7670   3.7670   6.1360   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     75.406
      Density (g/cm3):      0.089
      MAX. ABS. INTENSITY / VOLUME**2:     0.9242630791E-01
      RIR:      0.339
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                27.34         57.04        3.2623    1   0   0         6
                31.05        100.00        2.8805    1   0   1        12
                48.32         14.96        1.8835    1   1   0         6
                52.83          7.07        1.7329    1   0   3        12
                56.41          1.45        1.6312    2   0   0         6
                58.55          3.35        1.5764    2   0   1        12
                60.34          1.25        1.5340    0   0   4         2
                80.80          1.08        1.1894    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.