Slawsonite
      Benna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E
      American Mineralogist 92 (2007) 1190-1199
      The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar:
      The I-1-I2/c and I2/c-P2_1/c phase transitions
      Sample: P = 4.4 GPa
      Locality: synthetic
      _database_code_amcsd 0004409

      CELL PARAMETERS:    8.2090  12.7800  14.0090   90.000  115.270   90.000
      SPACE GROUP: I2/c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1329.057
      Density (g/cm3):      3.160
      MAX. ABS. INTENSITY / VOLUME**2:      9.715583300    
      RIR:      1.001
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.86         28.10        6.3900    0   2   0         2
                13.98          7.69        6.3342    0   0   2         2
                15.61         16.09        5.6763   -1   1   2         4
                19.73         18.62        4.4986    0   2   2         4
                21.99          8.06        4.0424   -2   0   2         2
                23.08          1.41        3.8533    1   1   2         4
                23.98          9.87        3.7117    2   0   0         2
                24.09         35.96        3.6948    1   3   0         4
                25.19         25.90        3.5352   -1   3   2         4
                26.08         17.62        3.4162   -2   2   2         4
                26.39         66.16        3.3777   -1   1   4         4
                27.80        100.00        3.2096    2   2   0         4
                27.93          8.17        3.1950    0   4   0         2
                28.17         48.25        3.1678   -2   0   4         2
                28.18         47.17        3.1671    0   0   4         2
                30.49         52.08        2.9319    1   3   2         4
                31.36         23.45        2.8527    0   4   2         4
                31.52          3.38        2.8382   -2   2   4         4
                31.53          3.31        2.8377    0   2   4         4
                33.11         39.14        2.7054   -1   3   4         4
                33.52          4.08        2.6736   -3   1   2         4
                35.73          9.92        2.5133    2   2   2         4
                35.82         43.15        2.5066   -2   4   2         4
                35.94         14.10        2.4985   -3   1   4         4
                35.95         13.89        2.4978    1   1   4         4
                37.00          5.83        2.4294    3   1   0         4
                37.96         14.89        2.3704   -1   5   2         4
                39.05          3.06        2.3066   -2   0   6         2
                39.15         11.81        2.3010   -3   3   2         4
                39.71          5.90        2.2697   -1   1   6         4
                41.29          5.40        2.1865   -3   3   4         4
                41.30          5.69        2.1860    1   3   4         4
                41.63          6.60        2.1696   -2   2   6         4
                41.82         18.24        2.1602    1   5   2         4
                42.44         14.29        2.1300    0   6   0         2
                43.57          7.98        2.0771    2   4   2         4
                43.85          4.65        2.0646   -1   5   4         4
                44.64          3.88        2.0301   -4   0   2         2
                44.68          3.20        2.0282   -1   3   6         4
                44.84          1.54        2.0212   -4   0   4         2
                44.85          1.83        2.0207    2   0   4         2
                44.90          5.89        2.0189    0   6   2         4
                45.23          1.37        2.0048    0   2   6         4
                45.23          7.26        2.0047    3   1   2         4
                46.96          6.14        1.9348   -4   2   2         4
                47.16          7.07        1.9271   -4   2   4         4
                47.17          7.17        1.9266    2   2   4         4
                48.09          4.38        1.8921   -3   3   6         4
                48.30          3.94        1.8844   -2   6   2         4
                48.77          3.39        1.8672   -3   5   2         4
                49.09         11.07        1.8559    4   0   0         2
                49.67          6.63        1.8356   -4   0   6         2
                49.76          5.79        1.8324    3   3   2         4
                50.22          7.61        1.8165    1   1   6         4
                50.59          5.77        1.8044   -3   5   4         4
                50.59          5.77        1.8042    1   5   4         4
                51.72          3.50        1.7676   -2   6   4         4
                51.72          3.75        1.7675    0   6   4         4
                51.82          1.20        1.7643   -4   2   6         4
                51.91          7.66        1.7615    0   4   6         4
                52.14          1.22        1.7543   -1   7   2         4
                52.24         19.10        1.7511   -2   0   8         2
                53.48          6.62        1.7135   -4   4   2         4
                53.66          2.33        1.7081   -4   4   4         4
                53.67          2.36        1.7078    2   4   4         4
                54.32          1.89        1.6889   -2   2   8         4
                56.53          7.23        1.6280   -3   5   6         4
                56.58          1.56        1.6267   -5   1   4         4
                56.59          1.53        1.6263    3   1   4         4
                56.87          3.28        1.6189   -1   7   4         4
                57.39          1.39        1.6056    4   0   2         2
                57.71          4.30        1.5975    0   8   0         2
                57.87          1.34        1.5933   -5   1   2         4
                58.02          6.22        1.5896    3   5   2         4
                60.19          5.65        1.5374   -4   2   8         4
                60.21          5.65        1.5371    0   2   8         4
                60.49          3.42        1.5305   -5   3   4         4
                60.50          3.27        1.5302    3   3   4         4
                60.76          3.53        1.5244    2   2   6         4
                61.88          3.24        1.4995    0   6   6         4
                62.60          2.12        1.4840   -3   7   4         4
                62.60          2.10        1.4839    1   7   4         4
                63.10          5.68        1.4733   -5   3   6         4
                63.28          3.55        1.4696   -4   6   2         4
                63.39         11.81        1.4674    2   8   0         4
                65.17          1.17        1.4315   -1   7   6         4
                65.72          1.71        1.4207   -5   1   8         4
                65.74          1.78        1.4204    1   1   8         4
                66.35          5.08        1.4089    2   4   6         4
                66.72          1.52        1.4020    5   3   0         4
                66.86          4.47        1.3992    4   6   0         4
                67.34          1.01        1.3905   -4   6   6         4
                68.65          3.14        1.3671   -6   0   4         2
                68.67          3.25        1.3668    4   0   4         2
                69.21          1.51        1.3574    3   7   2         4
                69.49          3.32        1.3527   -2   6   8         4
                70.37          2.64        1.3379   -5   5   6         4
                71.53          1.11        1.3190   -4   2  10         4
                71.72          5.25        1.3159   -1   9   4         4
                71.89          1.52        1.3133   -2   8   6         4
                72.89          1.24        1.2978   -6   2   2         4
                73.73          3.32        1.2851   -1   3  10         4
                74.19          1.37        1.2782   -2   4  10         4
                74.20          1.72        1.2780    0  10   0         2
                74.49          1.46        1.2738   -6   0   8         2
                74.51          1.42        1.2735    2   0   8         2
                75.06          1.42        1.2654    5   3   2         4
                75.92          4.20        1.2533   -4   8   4         4
                75.93          4.32        1.2532    2   8   4         4
                76.73          2.68        1.2420   -4   4  10         4
                78.05          1.85        1.2243   -3   5  10         4
                78.79          1.72        1.2147    6   2   0         4
                78.80          1.47        1.2145   -5   3  10         4
                80.57          1.08        1.1922   -1   5  10         4
                81.57          1.21        1.1802   -2   8   8         4
                82.71          1.01        1.1668   -2   6  10         4
                83.85          2.62        1.1538    6   4   0         4
                86.54          2.04        1.1248   -4   8   8         4
                86.55          2.04        1.1246    0   8   8         4
                89.26          1.08        1.0973    4   4   6         4
                89.71          1.08        1.0930    2   6   8         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.