Hydrogen
      Vindryevsky B A, Ishmaev S N, Sadikov I P, Chernyshev A A
      Physics Letters 76A (1980) 355-358
      Neutron diffraction studies of solid parahydrogen at pressures up to 5 kbar
      Locality: synthetic
      Sample: P = .0021 GPa, T = 13.7 K
      _database_code_amcsd 0015292

      CELL PARAMETERS:    3.7960   3.7960   6.1630   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     76.909
      Density (g/cm3):      0.044
      MAX. ABS. INTENSITY / VOLUME**2:     0.4695595758E-01
      RIR:      0.351
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                27.12         27.80        3.2874    1   0   0         6
                28.98         28.64        3.0815    0   0   2         2
                30.83        100.00        2.9006    1   0   1        12
                40.11          9.81        2.2482    1   0   2        12
                47.93          7.42        1.8980    1   1   0         6
                52.53          6.44        1.7421    1   0   3        12
                56.98          5.16        1.6161    1   1   2        12
                58.08          3.42        1.5882    2   0   1        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.