Calomel
      Calos N J, Kennard C H L, Davis R L
      Zeitschrift fur Kristallographie 187 (1989) 305-307
      The structure of calomel, Hg2Cl2, derived from neutron powder data
      _database_code_amcsd 0010993

      CELL PARAMETERS:    4.4795   4.4795  10.9054   90.000   90.000   90.000
      SPACE GROUP: I4/mmm    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    218.827
      Density (g/cm3):      7.164
      MAX. ABS. INTENSITY / VOLUME**2:      225.1595661    
      RIR:     10.234
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                21.44        100.00        4.1436    1   0   1         8
                28.17         81.48        3.1675    1   1   0         4
                31.70         10.09        2.8227    1   0   3         8
                32.85         18.78        2.7264    0   0   4         2
                40.27         19.29        2.2397    2   0   0         4
                43.81         20.42        2.0663    1   1   4         8
                46.07          8.07        1.9703    2   1   1        16
                46.30         10.55        1.9610    1   0   5         8
                52.90          7.13        1.7306    2   0   4         8
                58.26          2.58        1.5837    2   2   0         4
                63.00          3.15        1.4754    2   1   5        16
                65.94          2.31        1.4165    3   1   0         8
                68.52          1.26        1.3695    2   2   4         8
                75.66          1.22        1.2570    3   1   4        16
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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.