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 = 1.51 GPa & T = 16.5 K
      Note: known as para-hydrogen
      _database_code_amcsd 0015891

      CELL PARAMETERS:    2.9530   2.9530   4.8090   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     36.317
      Density (g/cm3):      0.184
      MAX. ABS. INTENSITY / VOLUME**2:     0.1236818666    
      RIR:      0.218
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                35.09         64.11        2.5574    1   0   0         6
                39.93        100.00        2.2580    1   0   1        12
                62.95          9.18        1.4765    1   1   0         6
                69.16          3.94        1.3582    1   0   3        12
                77.20          1.71        1.2357    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.