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 = 0.0001 GPa
      Locality: synthetic
      _database_code_amcsd 0004407

      CELL PARAMETERS:    8.3700  12.9670  14.2620   90.580  115.550   90.440
      SPACE GROUP: I-1       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1396.342
      Density (g/cm3):      3.008
      MAX. ABS. INTENSITY / VOLUME**2:      5.217309766    
      RIR:      0.565
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.49          2.05        6.5631   -1   1   0         2
                13.66         44.54        6.4826    0   2   0         2
                13.77         15.58        6.4329    0   0   2         2
                15.30          9.73        5.7923   -1  -1   2         2
                15.34         12.86        5.7760   -1   1   2         2
                17.44          1.00        5.0844   -1  -2   1         2
                19.29         23.82        4.6006    0  -2   2         2
                19.59         12.69        4.5326    0   2   2         2
                21.55         22.24        4.1241   -2   0   2         2
                21.93          1.03        4.0537    0   1   3         2
                22.85          1.23        3.8911    1   1   2         2
                23.29          1.31        3.8198   -1  -2   3         2
                23.56         18.81        3.7754    2   0   0         2
                23.58         34.56        3.7726   -1   3   0         2
                23.86         40.89        3.7294    1   3   0         2
                24.74         24.28        3.5984   -1  -3   2         2
                24.82         20.88        3.5867   -1   3   2         2
                25.54         18.84        3.4876   -2   2   2         2
                25.66         21.01        3.4717   -2  -2   2         2
                25.85         58.03        3.4466   -1  -1   4         2
                25.99         62.64        3.4287   -1   1   4         2
                27.17        100.00        3.2816   -2   2   0         2
                27.50         93.99        3.2437    2   2   0         2
                27.52         15.49        3.2413    0   4   0         2
                27.60         93.05        3.2315   -2   0   4         2
                27.74         92.83        3.2165    0   0   4         2
                29.78         51.95        2.9999    1  -3   2         2
                30.30         52.94        2.9502    1   3   2         2
                30.70         34.03        2.9121    0  -4   2         2
                30.85          7.90        2.8985    0  -2   4         2
                30.88          2.76        2.8962   -2  -2   4         2
                30.96          2.04        2.8880   -2   2   4         2
                31.08         16.07        2.8775    0   4   2         2
                31.23          1.96        2.8644    0   2   4         2
                32.26          1.88        2.7751    2   0   2         2
                32.39         37.48        2.7641   -1  -3   4         2
                32.73         38.04        2.7365   -1   3   4         2
                32.81          3.71        2.7296   -3   1   2         2
                32.93          2.91        2.7203   -3  -1   2         2
                34.96          8.76        2.5663    2  -2   2         2
                35.13         39.56        2.5547   -2   4   2         2
                35.19         13.67        2.5501   -3   1   4         2
                35.22         16.40        2.5483   -3  -1   4         2
                35.30         16.70        2.5426    1  -1   4         2
                35.31         46.18        2.5422   -2  -4   2         2
                35.39          7.91        2.5363    2   2   2         2
                35.53         12.25        2.5265    1   1   4         2
                36.27          5.94        2.4770   -3   1   0         2
                36.45          5.75        2.4647    3   1   0         2
                36.80          2.16        2.4425    1   5   0         2
                37.32         12.35        2.4095   -1  -5   2         2
                37.41         13.74        2.4036   -1   5   2         2
                38.28         12.22        2.3512   -3   3   2         2
                38.30          2.27        2.3501   -2   0   6         2
                38.58         11.08        2.3335   -3  -3   2         2
                38.93          8.51        2.3132   -1  -1   6         2
                39.11          8.81        2.3034   -1   1   6         2
                40.37          3.55        2.2344    1  -3   4         2
                40.46          6.62        2.2296   -3   3   4         2
                40.52          5.16        2.2261   -3  -3   4         2
                40.73          4.63        2.2151   -2  -2   6         2
                40.86         15.46        2.2084    1  -5   2         2
                40.95          6.95        2.2038   -2   2   6         2
                40.99          5.14        2.2021    1   3   4         2
                41.51         17.39        2.1752    1   5   2         2
                41.80         30.84        2.1609    0   6   0         2
                42.51          1.19        2.1264   -3  -1   6         2
                42.54         14.72        2.1252    2  -4   2         2
                42.92          4.34        2.1073   -1  -5   4         2
                43.26          6.81        2.0913    2   4   2         2
                43.36          6.59        2.0869   -1   5   4         2
                43.68          3.89        2.0722   -1  -3   6         2
                43.77         10.97        2.0684   -4   0   2         2
                43.91          5.76        2.0620   -4   0   4         2
                44.01          7.56        2.0577    0  -6   2         2
                44.15          4.25        2.0512   -1   3   6         2
                44.17          2.89        2.0504    2   0   4         2
                44.29          1.64        2.0449    0  -2   6         2
                44.39          7.96        2.0409    3  -1   2         2
                44.42          6.99        2.0392    0   6   2         2
                44.62          8.02        2.0310    3   1   2         2
                45.92          4.25        1.9762   -4   2   2         2
                46.13          9.29        1.9679   -4   2   4         2
                46.20          4.89        1.9649   -4  -2   2         2
                46.21          6.33        1.9644    2  -2   4         2
                46.27          9.20        1.9622   -4  -2   4         2
                46.69          8.35        1.9456    2   2   4         2
                47.07          5.95        1.9308   -3  -3   6         2
                47.21          4.19        1.9253   -3   3   6         2
                47.40          2.68        1.9180   -2   6   2         2
                47.61          5.04        1.9101   -2  -6   2         2
                47.70          3.96        1.9064   -3   5   2         2
                48.00          1.45        1.8954   -2   4   6         2
                48.13          3.56        1.8906   -3  -5   2         2
                48.21         25.10        1.8877    4   0   0         2
                48.60         15.69        1.8733   -4   0   6         2
                48.63          6.76        1.8721    3  -3   2         2
                49.27          6.79        1.8494    3   3   2         2
                49.32          8.88        1.8477    1  -1   6         2
                49.37          5.54        1.8458    1  -5   4         2
                49.56         10.32        1.8393    1   1   6         2
                49.61          6.29        1.8376   -3   5   4         2
                49.70          4.65        1.8344   -3  -5   4         2
                50.25          5.82        1.8155    1   5   4         2
                50.53          3.69        1.8062    0  -6   4         2
                50.58          1.02        1.8044   -1   7   0         2
                50.69          8.60        1.8008    0  -4   6         2
                50.74          4.97        1.7992   -2  -6   4         2
                50.90          1.04        1.7941    3   5   0         2
                50.92          3.20        1.7933   -2   6   4         2
                51.25         45.42        1.7826   -2   0   8         2
                51.28          5.29        1.7814    0   6   4         2
                51.37          2.25        1.7788   -1   7   2         2
                51.45          9.15        1.7762    0   4   6         2
                52.23          9.22        1.7515   -4   4   2         2
                52.40          4.31        1.7460    2  -4   4         2
                52.48          3.28        1.7438   -4   4   4         2
                52.73          8.36        1.7359   -4  -4   2         2
                52.73          2.21        1.7359   -4  -4   4         2
                53.26          2.57        1.7198    2   4   4         2
                53.31          2.39        1.7185    2  -6   2         2
                53.45          3.48        1.7144   -2   2   8         2
                55.34          2.07        1.6602   -5   1   4         2
                55.35          8.10        1.6599   -3  -5   6         2
                55.44          1.89        1.6572   -5  -1   4         2
                55.56          7.72        1.6542   -3   5   6         2
                55.56          1.80        1.6541    3  -1   4         2
                55.69          4.06        1.6505   -1  -7   4         2
                55.81          2.26        1.6472    3   1   4         2
                56.20          3.25        1.6368   -1   7   4         2
                56.41          1.66        1.6312    4   0   2         2
                56.60          6.45        1.6262    3  -5   2         2
                56.65          1.79        1.6248   -5   1   2         2
                56.81         10.37        1.6206    0   8   0         2
                56.81          1.32        1.6205   -5  -1   2         2
                57.00          1.55        1.6158   -3  -3   8         2
                57.00          1.14        1.6157   -4   0   8         2
                57.55          8.04        1.6015    3   5   2         2
                58.85          6.80        1.5691   -4  -2   8         2
                58.96          6.84        1.5665   -4   2   8         2
                58.97          7.66        1.5664    0  -2   8         2
                59.09          3.07        1.5635   -5   3   4         2
                59.16          4.08        1.5617    3  -3   4         2
                59.40          2.97        1.5561   -5  -3   4         2
                59.42          6.53        1.5555    0   2   8         2
                59.54          4.12        1.5527    2  -2   6         2
                59.89          3.32        1.5445    3   3   4         2
                60.05          3.32        1.5407    2   2   6         2
                60.36          2.50        1.5335    0  -6   6         2
                61.07          3.83        1.5174    1  -7   4         2
                61.36          5.44        1.5109    0   6   6         2
                61.41          2.72        1.5098   -3   7   4         2
                61.52          2.61        1.5073   -3  -7   4         2
                61.68          7.99        1.5038   -5   3   6         2
                61.78          6.78        1.5016   -4   6   2         2
                61.81          9.15        1.5009   -5  -3   6         2
                61.86          1.09        1.5000    2  -6   4         2
                62.01         16.16        1.4965   -2   8   0         2
                62.06          1.31        1.4956   -4   6   4         2
                62.14          2.31        1.4938    1   7   4         2
                62.46          5.94        1.4869   -4  -6   2         2
                62.67          1.62        1.4824    3   7   0         2
                62.69         14.76        1.4821    2   8   0         2
                63.02          1.20        1.4751    2   6   4         2
                63.63          2.61        1.4623   -1  -7   6         2
                64.25          2.70        1.4498   -5  -1   8         2
                64.26          2.57        1.4496   -5   1   8         2
                64.53          2.02        1.4442    1  -1   8         2
                64.78          2.06        1.4391    1   1   8         2
                64.79          7.89        1.4390    2  -4   6         2
                65.13          1.09        1.4322    0   4   8         2
                65.16          1.80        1.4316   -5   3   0         2
                65.19          5.48        1.4311   -4   6   0         2
                65.76          7.30        1.4201    2   4   6         2
                65.78          2.24        1.4197    5   3   0         2
                65.84          1.01        1.4185   -1   9   0         2
                65.99          2.25        1.4156   -4   6   6         2
                66.01          1.10        1.4153   -4  -6   6         2
                66.17          5.39        1.4123    4   6   0         2
                66.20          2.41        1.4116    1   9   0         2
                67.17         10.18        1.3936   -6   0   4         2
                67.44          1.48        1.3886    3  -7   2         2
                67.50          9.46        1.3876    4   0   4         2
                67.81          4.94        1.3820   -2  -6   8         2
                67.82          1.31        1.3819    1  -3   8         2
                68.25          1.40        1.3743   -4   0  10         2
                68.59          3.99        1.3683   -2   6   8         2
                68.65          1.80        1.3671    3   7   2         2
                68.78          3.92        1.3649   -5   5   6         2
                68.96          1.16        1.3618    3  -1   6         2
                68.99          4.11        1.3612   -5  -5   6         2
                69.24          1.29        1.3570    3   1   6         2
                69.88          2.85        1.3461   -4  -2  10         2
                70.08          1.30        1.3427   -4   2  10         2
                70.15          1.47        1.3415    5  -1   2         2
                70.22          8.63        1.3404   -1  -9   4         2
                70.29          1.23        1.3392   -2  -8   6         2
                70.40          1.33        1.3373    5   1   2         2
                70.79          6.45        1.3310   -1   9   4         2
                70.90          2.24        1.3292   -2   8   6         2
                71.20          2.54        1.3243   -6   2   2         2
                71.22          2.08        1.3241    1  -7   6         2
                71.57          2.39        1.3184   -6  -2   2         2
                72.04          4.89        1.3110   -1  -3  10         2
                72.40          2.89        1.3054   -2  -4  10         2
                72.56          1.02        1.3028    1   7   6         2
                72.69          4.27        1.3009   -1   3  10         2
                72.74          3.84        1.3000   -6   0   8         2
                72.97          4.66        1.2965    0  10   0         2
                73.10          1.92        1.2945   -2   4  10         2
                73.24          1.21        1.2924    2  -6   6         2
                73.25          4.86        1.2922    2   0   8         2
                73.32          1.49        1.2912    5  -3   2         2
                73.79          1.50        1.2841   -3   9   2         2
                73.94          5.40        1.2819    2  -8   4         2
                74.05          1.95        1.2802    5   3   2         2
                74.25          6.46        1.2773   -4   8   4         2
                74.61          1.70        1.2720    2   6   6         2
                74.67          8.13        1.2711   -4  -8   4         2
                74.88          4.38        1.2681   -4  -4  10         2
                75.06          1.78        1.2656    0  -2  10         2
                75.21          1.04        1.2633   -6  -4   6         2
                75.27          4.38        1.2624   -4   4  10         2
                75.36          7.94        1.2612    2   8   4         2
                75.55          1.46        1.2585    6   0   0         2
                75.56          1.07        1.2584    0   2  10         2
                76.09          2.21        1.2509   -6   4   2         2
                76.12          1.93        1.2506   -3  -5  10         2
                76.79          3.05        1.2412   -3   5  10         2
                76.81          1.65        1.2410   -6  -4   2         2
                76.91          2.40        1.2396   -5  -3  10         2
                76.99          2.92        1.2385   -6   2   0         2
                77.09          2.35        1.2372   -5   3  10         2
                77.30          1.40        1.2343   -1  -9   6         2
                77.45          2.47        1.2323    6   2   0         2
                77.53          1.27        1.2313   -2  10   0         2
                78.31          1.22        1.2210   -1   9   6         2
                78.53          1.02        1.2181   -1  -5  10         2
                79.53          1.44        1.2053   -2  -8   8         2
                79.57          1.30        1.2048   -2 -10   4         2
                79.58          1.77        1.2046   -1   5  10         2
                79.79          1.97        1.2020    0  -4  10         2
                79.87          1.08        1.2009    3   5   6         2
                80.50          2.43        1.1931   -2   8   8         2
                80.51          2.71        1.1930   -6   0  10         2
                80.56          1.78        1.1924   -2  -6  10         2
                80.78          1.71        1.1898    0   4  10         2
                81.32          1.27        1.1832    1  -1  10         2
                81.59          2.50        1.1799   -2   6  10         2
                81.61          1.47        1.1798    1   1  10         2
                81.71          4.41        1.1785   -6   4   0         2
                82.61          4.12        1.1679    6   4   0         2
                82.71          1.16        1.1667   -6  -6   4         2
                84.18          3.38        1.1502    0  -8   8         2
                84.52          1.47        1.1464   -5  -7   8         2
                84.53          3.19        1.1463   -4  -8   8         2
                84.90          3.91        1.1422   -4   8   8         2
                85.74          3.16        1.1332    0   8   8         2
                87.00          1.32        1.1200   -6  -4  10         2
                87.04          2.11        1.1196    4  -4   6         2
                87.27          1.86        1.1172    2  -6   8         2
                87.50          1.60        1.1148   -6   6   8         2
                87.67          1.48        1.1131   -6  -6   8         2
                87.71          1.12        1.1127   -3  -9   8         2
                88.22          2.01        1.1076    4   4   6         2
                88.88          1.92        1.1010    2   6   8         2
                89.17          2.09        1.0982    3  -9   4         2
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.