Marshite
      Hull S, Keen D A
      Physical Review B50 (1994) 5868-5885
      High-pressure polymorphism of the copper(I) halides:
      A neutron-diffraction study to ~10 GPa
      Note: P = 1.74 GPa
      Note: known as CuI-IV
      _database_code_amcsd 0015181

      CELL PARAMETERS:    4.1550   4.1550  20.4800   90.000   90.000  120.000
      SPACE GROUP: R-3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    306.198
      Density (g/cm3):      6.196
      MAX. ABS. INTENSITY / VOLUME**2:      154.0981686    
      RIR:      8.098
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.97         33.38        6.8267    0   0   3         2
                25.13         15.98        3.5440    1   0   1         6
                26.11         42.27        3.4133    0   0   6         2
                26.25        100.00        3.3948    0   1   2         6
                30.36         16.27        2.9440    1   0   4         6
                33.14          5.46        2.7033    0   1   5         6
                39.71          5.55        2.2700    1   0   7         6
                43.38         53.00        2.0860    0   1   8         6
                43.56         53.04        2.0775    1   1   0         6
                45.65          5.60        1.9875    1   1   3        12
                50.95          1.46        1.7923    0   2   1         6
                51.33         10.54        1.7799    1   0  10         6
                51.50         31.45        1.7746    1   1   6        12
                51.58         12.86        1.7720    2   0   2         6
                53.71          1.25        1.7067    0   0  12         2
                54.02          3.43        1.6974    0   2   4         6
                55.58          1.65        1.6536    0   1  11         6
                63.16         13.13        1.4720    2   0   8         6
                69.34          6.17        1.3552    0   1  14         6
                69.55          3.71        1.3517    0   2  10         6
                69.75          8.79        1.3482    1   2   2        12
                71.55          3.32        1.3187    1   1  12        12
                71.82          3.11        1.3145    2   1   4        12
                79.47          5.13        1.2060    1   0  16         6
                79.86         10.46        1.2011    1   2   8        12
                79.99          5.26        1.1994    3   0   0         6
                85.56          2.91        1.1350    2   0  14         6
                85.76          3.77        1.1330    2   1  10        12
                85.88          2.53        1.1316    0   3   6         6
                85.88          2.53        1.1316    3   0   6         6
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.