Kirkiite
      Pinto D, Balic-Zunic T, Garavelli A, Garbarino C, Makovicky E, Vurro F
      European Journal of Mineralogy 18 (2006) 393-401
      First occurrence of close-to-ideal kirkiite at Vulcano (Aeolian Islands,
      Italy): chemical data and single-crystal X-ray study
      Locality: La Fossa crater, Vulcano, Aeolian Islands, Italy
      _database_code_amcsd 0007156

      CELL PARAMETERS:    8.7000  26.2370   8.7740   90.000  119.653   90.000
      SPACE GROUP: P2_1/m    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1740.482
      Density (g/cm3):      6.737
      MAX. ABS. INTENSITY / VOLUME**2:      64.40364018    
      RIR:      3.113
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 6.74          2.50       13.1185    0   2   0         2
                11.70          1.06        7.5606    1   0   0         2
                11.72          3.90        7.5529   -1   0   1         2
                12.09          5.49        7.3220    0   1   1         4
                12.18          5.11        7.2650    1   1   0         4
                13.43          5.47        6.5923    0   2   1         4
                13.50          1.18        6.5592    0   4   0         2
                13.52          4.25        6.5506    1   2   0         4
                15.42          1.90        5.7473    0   3   1         4
                15.49          1.41        5.7196    1   3   0         4
                15.50          6.48        5.7162   -1   3   1         4
                17.84          3.84        4.9725    0   4   1         4
                17.90          4.61        4.9546    1   4   0         4
                20.22          3.18        4.3913    1   0   1         2
                20.31          1.38        4.3728    0   6   0         2
                20.53          5.20        4.3267   -1   1   2         4
                20.61          2.49        4.3094   -1   5   1         4
                20.70          5.72        4.2914   -2   1   1         4
                23.58          3.85        3.7728    0   1   2         4
                23.78          3.75        3.7417    2   1   0         4
                23.80          2.27        3.7379   -2   1   2         4
                24.31         39.22        3.6610    0   2   2         4
                24.51         42.83        3.6325    2   2   0         4
                24.53         39.32        3.6291   -2   2   2         4
                25.49         51.41        3.4948    0   3   2         4
                25.67         47.90        3.4700    2   3   0         4
                25.70         46.82        3.4670   -2   3   2         4
                27.05         30.98        3.2961    0   4   2         4
                27.19        100.00        3.2796    0   8   0         2
                27.23         31.49        3.2753    2   4   0         4
                27.25         38.80        3.2728   -2   4   2         4
                28.95         66.58        3.0843    0   5   2         4
                29.11         65.32        3.0672    2   5   0         4
                29.13         64.53        3.0652   -2   5   2         4
                31.12         47.50        2.8737    0   6   2         4
                31.25          1.11        2.8621    1   1   2         4
                31.28         48.62        2.8598    2   6   0         4
                31.30         45.06        2.8581   -2   6   2         4
                31.39          3.65        2.8496   -1   7   2         4
                31.51          2.55        2.8395   -2   7   1         4
                31.97          1.09        2.7994   -2   2   3         4
                32.75          1.56        2.7349    1   3   2         4
                32.86          1.90        2.7259    2   3   1         4
                32.89          2.83        2.7230   -2   3   3         4
                33.06          1.01        2.7094   -3   3   1         4
                33.53          5.15        2.6728    0   7   2         4
                33.67          4.74        2.6616    2   7   0         4
                33.69          3.72        2.6603   -2   7   2         4
                34.00          4.40        2.6365    1   4   2         4
                34.11          4.34        2.6284    2   4   1         4
                34.12          4.26        2.6277    1   8   1         4
                34.15          5.52        2.6258   -2   4   3         4
                34.32          3.60        2.6126   -3   4   2         4
                35.48          2.51        2.5298    0   1   3         4
                35.59          1.76        2.5228   -1   5   3         4
                35.66          1.55        2.5176   -3   0   3         2
                35.79          1.89        2.5087    3   1   0         4
                35.86          2.15        2.5042   -3   5   1         4
                36.28          1.23        2.4762   -2   8   2         4
                37.03          3.26        2.4280   -1   9   2         4
                37.12          4.86        2.4217   -2   9   1         4
                38.89          2.77        2.3158    0   9   2         4
                39.02          2.63        2.3085    2   9   0         4
                39.03          2.09        2.3076   -2   9   2         4
                39.63          1.30        2.2745   -1  11   1         4
                41.11         50.78        2.1957    2   0   2         2
                41.16         50.72        2.1934   -2   0   4         2
                41.52         51.66        2.1750   -4   0   2         2
                41.79         12.82        2.1613    0  10   2         4
                41.91         13.69        2.1554    2  10   0         4
                41.93         12.74        2.1547   -2  10   2         4
                43.04          1.32        2.1017    0  12   1         4
                43.07          1.50        2.1004    1  12   0         4
                43.26          1.18        2.0914    3   7   0         4
                44.82         14.11        2.0221    0  11   2         4
                44.94         14.00        2.0172    2  11   0         4
                44.95         14.12        2.0166   -2  11   2         4
                45.13          3.64        2.0090    0   8   3         4
                45.38          1.52        1.9983    3   8   0         4
                45.42          1.41        1.9970   -3   8   3         4
                46.58          1.04        1.9498   -1  13   1         4
                47.46          2.49        1.9158    0   9   3         4
                47.70          1.59        1.9065    3   9   0         4
                47.97         11.26        1.8967    0  12   2         4
                48.07         11.41        1.8927    2  12   0         4
                48.09         13.70        1.8922   -2  12   2         4
                48.24          5.68        1.8864    0   2   4         4
                48.67          5.19        1.8708    4   2   0         4
                48.72          5.96        1.8690   -4   2   4         4
                48.90          6.90        1.8625    0   3   4         4
                49.33          8.09        1.8475    4   3   0         4
                49.38          8.25        1.8457   -4   3   4         4
                49.81          8.04        1.8305    0   4   4         4
                49.99         32.41        1.8245    2   8   2         4
                50.03         32.29        1.8232   -2   8   4         4
                50.12          1.08        1.8199    0  14   1         4
                50.23          7.53        1.8162    4   4   0         4
                50.28          4.48        1.8145   -4   4   4         4
                50.34         32.86        1.8126   -4   8   2         4
                50.97          8.90        1.7917    0   5   4         4
                51.21          5.55        1.7837    0  13   2         4
                51.32          4.95        1.7804    2  13   0         4
                51.33          4.79        1.7800   -2  13   2         4
                51.38         10.21        1.7783    4   5   0         4
                51.43         10.12        1.7767   -4   5   4         4
                52.36          6.37        1.7474    0   6   4         4
                52.76          6.32        1.7350    4   6   0         4
                52.81          7.72        1.7335   -4   6   4         4
                52.93          1.11        1.7299   -2   2   5         4
                53.55          1.22        1.7114   -2   3   5         4
                54.41          1.43        1.6863   -4   7   4         4
                54.56          3.21        1.6819    0  14   2         4
                54.66          3.44        1.6791    2  14   0         4
                54.67          3.24        1.6787   -2  14   2         4
                56.08         14.95        1.6398    0  16   0         2
                59.99          3.54        1.5422    0  10   4         4
                60.35          3.44        1.5336    4  10   0         4
                60.40          3.80        1.5326   -4  10   4         4
                61.75          1.23        1.5023    0   3   5         4
                62.36          4.08        1.4891    0  11   4         4
                62.53          1.37        1.4854    0   4   5         4
                62.72          4.57        1.4814    4  11   0         4
                62.76          4.42        1.4805   -4  11   4         4
                63.02          1.65        1.4751   -4   8   5         4
                64.90          4.34        1.4368    0  12   4         4
                65.19          1.98        1.4311    2   2   4         4
                65.25          2.10        1.4300   -2   2   6         4
                65.25          4.09        1.4299    4  12   0         4
                65.29          2.71        1.4291   -4  12   4         4
                65.46          2.28        1.4259    4   2   2         4
                65.54          1.83        1.4243   -4   2   6         4
                65.73          2.99        1.4205    2   3   4         4
                65.79          3.02        1.4195   -2   3   6         4
                65.95          2.45        1.4165   -6   2   2         4
                65.98          1.83        1.4158   -6   2   4         4
                66.00          2.60        1.4155    4   3   2         4
                66.08          2.45        1.4139   -4   3   6         4
                66.49          2.95        1.4062   -6   3   2         4
                66.49          2.11        1.4062    2   4   4         4
                66.52          2.71        1.4056   -6   3   4         4
                66.55          1.57        1.4052   -2   4   6         4
                66.75          2.55        1.4013    4   4   2         4
                66.84          3.50        1.3997   -4   4   6         4
                67.24          1.85        1.3923   -6   4   2         4
                67.27          3.44        1.3917   -6   4   4         4
                67.46          3.87        1.3883    2   5   4         4
                67.51          3.80        1.3874   -2   5   6         4
                67.60          1.70        1.3858    0  13   4         4
                67.72          3.62        1.3837    4   5   2         4
                67.80          3.44        1.3821   -4   5   6         4
                67.95          2.26        1.3796    4  13   0         4
                67.99          2.37        1.3788   -4  13   4         4
                68.20          4.00        1.3750   -6   5   2         4
                68.24          3.88        1.3744   -6   5   4         4
                68.63          2.10        1.3674    2   6   4         4
                68.69          2.29        1.3665   -2   6   6         4
                68.89          2.21        1.3630    4   6   2         4
                68.97          1.76        1.3615   -4   6   6         4
                68.98          2.02        1.3615    0  18   2         4
                69.06          2.22        1.3600    2  18   0         4
                69.07          2.11        1.3598   -2  18   2         4
                69.37          2.53        1.3547   -6   6   2         4
                69.40          1.83        1.3542   -6   6   4         4
                70.46          1.20        1.3364    0  14   4         4
                70.80          1.15        1.3308    4  14   0         4
                70.84          1.29        1.3301   -4  14   4         4
                71.86         11.30        1.3138    2  16   2         4
                71.89         11.10        1.3133   -2  16   4         4
                72.14         11.57        1.3094   -4  16   2         4
                72.85          1.52        1.2984    0  19   2         4
                72.93          1.49        1.2971    2  19   0         4
                72.94          1.42        1.2969   -2  19   2         4
                74.69          4.45        1.2708    0   0   6         2
                75.30          1.42        1.2621    2  10   4         4
                75.35          1.45        1.2614   -2  10   6         4
                75.44          4.89        1.2601    6   0   0         2
                75.53          4.85        1.2588   -6   0   6         2
                75.54          1.66        1.2586    4  10   2         4
                75.62          1.32        1.2575   -4  10   6         4
                76.01          1.79        1.2521   -6  10   2         4
                76.04          1.37        1.2517   -6  10   4         4
                76.85          1.15        1.2405    0  20   2         4
                76.93          1.21        1.2393    2  20   0         4
                76.94          1.45        1.2392   -2  20   2         4
                77.43          1.64        1.2325    2  11   4         4
                77.48          1.56        1.2319   -2  11   6         4
                77.68          1.58        1.2293    4  11   2         4
                77.76          1.54        1.2282   -4  11   6         4
                78.14          1.74        1.2232   -6  11   2         4
                78.17          1.74        1.2228   -6  11   4         4
                79.76          1.27        1.2024    2  12   4         4
                80.00          1.50        1.1993    4  12   2         4
                80.08          2.19        1.1984   -4  12   6         4
                80.45          1.12        1.1937   -6  12   2         4
                80.48          2.15        1.1933   -6  12   4         4
                80.98          1.89        1.1873    0  21   2         4
                81.06          1.84        1.1863    2  21   0         4
                81.07          1.79        1.1862   -2  21   2         4
                81.17          5.20        1.1850    0   8   6         4
                81.90          5.61        1.1763    6   8   0         4
                81.99          5.42        1.1752   -6   8   6         4
                82.26          1.08        1.1720    2  13   4         4
                82.31          1.10        1.1714   -2  13   6         4
                84.77          1.03        1.1436    2   8   5         4
                84.83          1.44        1.1430   -2   8   7         4
                89.21          2.40        1.0978    4   0   4         2
                89.69          2.59        1.0932    0  24   0         2
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.