Hg2I2
      Wyckoff R W G
      Crystal Structures 1 (1963) 85-237
      Second edition. Interscience Publishers, New York, New York
      _database_code_amcsd 0011658

      CELL PARAMETERS:   4.9330  4.9330 11.6330   90.000   90.000   90.000
      SPACE GROUP: I4/mmm    
      X-RAY WAVELENGTH:     1.541838
      MAX. ABS. INTENSITY / VOLUME**2:      412.7777920    
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.55         20.33        4.5415    1   0   1         8
                25.54        100.00        3.4882    1   1   0         4
                30.74         24.48        2.9083    0   0   4         2
                36.43         38.28        2.4665    2   0   0         4
                40.38         45.19        2.2337    1   1   4         8
                41.67          6.07        2.1675    2   1   1        16
                42.98         15.66        2.1043    1   0   5         8
                48.39         25.88        1.8811    2   0   4         8
                52.47         12.47        1.7441    2   2   0         4
                56.52          1.19        1.6281    3   0   1         8
                57.58         12.36        1.6009    2   1   5        16
                59.23         16.67        1.5600    3   1   0         8
                62.05         11.41        1.4957    2   2   4         8
                64.03          1.24        1.4541    0   0   8         2
                68.22         16.59        1.3747    3   1   4        16
                69.13          1.23        1.3588    3   2   1        16
                70.07          3.21        1.3428    3   0   5         8
                70.11          3.66        1.3422    1   1   8         8
                75.97          2.83        1.2526    2   0   8         8
                76.13          5.48        1.2503    1   0   9         8
                77.38          3.44        1.2333    4   0   0         4
                81.64          3.99        1.1794    3   2   5        16
                83.06          2.79        1.1627    3   3   0         4
                85.53          4.13        1.1354    4   0   4         8
                87.30          1.90        1.1169    2   2   8         8
                87.46          7.37        1.1152    2   1   9        16
                88.68          4.71        1.1031    4   2   0         8
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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.