Phengite-2M1
      Ivaldi G, Ferraris G, Curetti N, Compagnoni R
      European Journal of Mineralogy 13 (2001) 1025-1034
      Coexisting 3T and 2M_1 polytypes of phengite from Cima Pal (Val Savenca, western Alps):
      Chemical and polytypic zoning and structural characterisation
      Sample: 2M1Y
      Locality: Cima Pal, Val Savenca, western Alps
      _database_code_amcsd 0006914

      CELL PARAMETERS:    5.2132   9.0510  19.9370   90.000   95.760   90.000
      SPACE GROUP: C2/c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    935.971
      Density (g/cm3):      2.872
      MAX. ABS. INTENSITY / VOLUME**2:      3.765832658    
      RIR:      0.427
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 8.92        100.00        9.9182    0   0   2         2
                17.89         20.76        4.9591    0   0   4         2
                19.62          5.81        4.5255    0   2   0         2
                19.73         33.18        4.5003    1   1   0         4
                19.85         88.54        4.4736   -1   1   1         4
                20.13         12.86        4.4121    0   2   1         4
                20.61         20.19        4.3086    1   1   1         4
                21.58         21.79        4.1172    0   2   2         4
                22.39          8.04        3.9701    1   1   2         4
                22.92         55.21        3.8808   -1   1   3         4
                23.83         53.02        3.7346    0   2   3         4
                24.88          2.50        3.5782    1   1   3         4
                25.54         76.49        3.4871   -1   1   4         4
                26.67         56.82        3.3428    0   2   4         4
                26.97         65.27        3.3061    0   0   6         2
                27.91         78.61        3.1969    1   1   4         4
                28.67          7.80        3.1135   -1   1   5         4
                29.95         83.10        2.9832    0   2   5         4
                31.33         54.56        2.8552    1   1   5         4
                32.17         43.90        2.7825   -1   1   6         4
                34.39          3.99        2.6079    1   3   0         4
                34.46         43.59        2.6027   -1   3   1         4
                34.59         21.15        2.5934    2   0   0         2
                34.87         49.53        2.5731   -2   0   2         2
                34.93         86.41        2.5690    1   3   1         4
                35.05         13.71        2.5601    1   1   6         4
                35.95         10.06        2.4980   -1   1   7         4
                36.23          7.31        2.4795    0   0   8         2
                36.39         13.29        2.4689   -1   3   3         4
                36.69          7.08        2.4496    2   0   2         2
                37.44          4.56        2.4018    0   2   7         4
                37.49         25.06        2.3992   -2   0   4         2
                37.71         56.54        2.3853    1   3   3         4
                39.84          2.81        2.2627    0   4   0         2
                39.93         12.73        2.2579   -2   2   1         4
                40.07          2.90        2.2501    2   2   0         4
                40.11          6.35        2.2482    0   4   1         4
                40.32          1.50        2.2368   -2   2   2         4
                40.42          6.97        2.2315   -1   3   5         4
                40.75         11.98        2.2143    2   2   1         4
                40.85          2.45        2.2089    2   0   4         2
                40.91          5.53        2.2061    0   4   2         4
                41.24         12.14        2.1891   -2   2   3         4
                41.94          4.86        2.1543    2   2   2         4
                42.07         20.43        2.1479   -2   0   6         2
                42.21          5.21        2.1409    0   4   3         4
                42.43         42.33        2.1304    1   3   5         4
                43.60          5.18        2.0758    2   2   3         4
                43.99          8.97        2.0586    0   4   4         4
                44.15          1.18        2.0512   -1   1   9         4
                44.53          2.34        2.0348   -2   2   5         4
                45.70          1.52        1.9851    2   2   4         4
                45.74         29.33        1.9836    0   0  10         2
                46.10         21.17        1.9691   -1   3   7         4
                46.63         11.27        1.9478    2   0   6         2
                46.82          2.62        1.9404   -2   2   6         4
                48.16          1.47        1.8894   -2   0   8         2
                48.63          1.59        1.8725    1   3   7         4
                48.77          4.25        1.8673    0   4   6         4
                49.42          1.55        1.8440   -1   3   8         4
                49.48          1.19        1.8420   -2   2   7         4
                50.22          1.34        1.8168    0   2  10         4
                51.70          1.98        1.7682    0   4   7         4
                52.48          5.22        1.7436   -2   2   8         4
                53.03          9.02        1.7269   -1   3   9         4
                53.04          1.26        1.7266   -1   1  11         4
                53.62          1.65        1.7091    1   5   0         4
                53.64          3.50        1.7086    2   0   8         2
                53.65          1.43        1.7084   -2   4   1         4
                53.67          1.57        1.7076   -1   5   1         4
                53.76          4.48        1.7050    2   4   0         4
                54.00          1.71        1.6980    1   5   1         4
                54.21          2.88        1.6919    2   2   7         4
                54.44          3.89        1.6854   -3   1   3         4
                54.70          1.78        1.6780   -2   4   3         4
                55.27          6.78        1.6622    2   4   2         4
                55.42         21.31        1.6579   -2   0  10         2
                55.43          1.19        1.6575   -3   1   4         4
                55.79          1.68        1.6479   -2   2   9         4
                55.82          5.02        1.6471    3   1   2         4
                55.85          3.72        1.6461   -2   4   4         4
                55.97         42.84        1.6430    1   3   9         4
                56.02          2.22        1.6416    1   5   3         4
                56.36          9.77        1.6326   -1   5   4         4
                56.63          2.80        1.6253    2   4   3         4
                56.83          9.88        1.6201   -3   1   5         4
                57.33          4.50        1.6071    3   1   3         4
                57.40          6.94        1.6054   -2   4   5         4
                57.62          6.31        1.5996    1   5   4         4
                57.67          3.97        1.5985    2   2   8         4
                58.61          4.57        1.5750   -3   1   6         4
                59.22          7.40        1.5602    3   1   4         4
                59.32          5.79        1.5578   -2   4   6         4
                59.37          2.53        1.5568   -2   2  10         4
                59.54          1.27        1.5527    0   2  12         4
                59.60          2.96        1.5511    1   5   5         4
                60.12          5.20        1.5391   -1   5   6         4
                60.50          3.18        1.5303    2   4   5         4
                60.97         21.02        1.5195   -1   3  11         4
                61.41          2.01        1.5097    1   1  12         4
                61.47         20.30        1.5085    0   6   0         2
                61.59         42.94        1.5057   -3   3   1         4
                61.60          1.03        1.5055   -2   4   7         4
                61.65          8.47        1.5044    2   0  10         2
                61.66          1.57        1.5042    0   6   1         4
                61.94          3.07        1.4982    1   5   6         4
                62.25          3.53        1.4913    0   6   2         4
                62.26          2.65        1.4912   -3   3   3         4
                62.50          4.32        1.4861    3   3   1         4
                62.96          3.85        1.4762    2   4   6         4
                63.21          1.57        1.4711   -2   2  11         4
                63.65          1.97        1.4620   -2   0  12         2
                64.27          4.47        1.4494    1   3  11         4
                64.44          2.85        1.4459    0   2  13         4
                64.61          1.45        1.4426    1   5   7         4
                65.37          4.72        1.4276    2   2  10         4
                65.93          2.17        1.4169    0   0  14         2
                66.06          1.59        1.4143   -3   1   9         4
                66.28          2.25        1.4102    0   4  11         4
                66.38          1.72        1.4083    1   1  13         4
                67.56          1.46        1.3865   -1   1  14         4
                69.59          5.59        1.3509    2   2  11         4
                69.83         24.57        1.3470   -1   3  13         4
                70.56          8.69        1.3348    0   4  12         4
                70.57         11.72        1.3346    2   0  12         2
                71.53          1.12        1.3190    1   1  14         4
                71.64          6.41        1.3173   -2   2  13         4
                72.39          2.69        1.3055   -2   6   1         4
                72.49          7.98        1.3040    2   6   0         4
                72.57          5.29        1.3027   -4   0   2         2
                72.66         14.93        1.3013   -2   6   2         4
                72.76          1.54        1.2998   -1   1  15         4
                72.96          7.23        1.2967    4   0   0         2
                73.16          7.93        1.2936   -3   3   9         4
                73.47          2.36        1.2890    1   3  13         4
                73.48          6.51        1.2887    0   6   8         4
                74.03          8.61        1.2805    3   3   7         4
                74.27          8.12        1.2770   -2   6   4         4
                74.78          4.92        1.2695    4   0   2         2
                75.09          3.59        1.2651    0   4  13         4
                75.87          4.22        1.2540   -1   7   1         4
                76.02          1.53        1.2519   -4   2   2         4
                76.11          3.50        1.2506   -4   0   6         2
                76.23          2.44        1.2490   -2   2  14         4
                76.40          1.36        1.2466    4   2   0         4
                76.46          6.17        1.2457    2   6   4         4
                76.51          2.67        1.2451   -3   5   3         4
                76.53          1.27        1.2449    0   6   9         4
                76.90          4.13        1.2398    0   0  16         2
                77.02          2.14        1.2381   -1   7   3         4
                77.66          2.68        1.2295    3   5   2         4
                77.84          2.45        1.2272    1   7   3         4
                78.12          3.97        1.2235   -4   2   5         4
                78.53          1.52        1.2181   -3   5   5         4
                78.79          3.96        1.2147    2   2  13         4
                79.21          1.86        1.2093    1   7   4         4
                79.47          2.45        1.2060   -3   3  11         4
                79.61          1.06        1.2042   -1   3  15         4
                79.63          1.82        1.2040    4   2   3         4
                79.89          1.44        1.2007    0   6  10         4
                80.06          2.12        1.1986   -3   5   6         4
                80.43          1.00        1.1940    2   0  14         2
                80.53          1.74        1.1927    3   3   9         4
                80.59          3.24        1.1920    3   5   4         4
                80.92          1.91        1.1880    1   7   5         4
                81.08          1.83        1.1861   -2   2  15         4
                81.26          1.76        1.1839   -4   2   7         4
                81.39          1.64        1.1823    4   2   4         4
                81.62          2.43        1.1796    3   1  11         4
                81.68          1.07        1.1789   -2   6   8         4
                83.51          2.28        1.1576   -1   7   7         4
                84.65          1.02        1.1449   -3   1  14         4
                86.33          3.14        1.1269   -2   4  14         4
                86.51          1.55        1.1251    4   4   0         4
                87.15          1.22        1.1184   -4   4   4         4
                87.41         10.65        1.1158   -2   6  10         4
                88.08          1.28        1.1090   -1   5  14         4
                88.53          5.47        1.1045    4   0   8         2
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.