Pigeonite
      Domeneghetti M C, Zema M, Tazzoli V
      American Mineralogist 90 (2005) 1816-1823
      Kinetics of Fe2+-Mg order-disorder in P2_1/c pigeonite
      Locality: Parana, Brazil
      Sample: N.13, annealed at T = 800 C for t = 60 min
      _database_code_amcsd 0003977

      CELL PARAMETERS:    9.7075   8.9444   5.2461   90.000  108.485   90.000
      SPACE GROUP: P2_1/c    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    432.006
      Density (g/cm3):      3.548
      MAX. ABS. INTENSITY / VOLUME**2:      11.63042987    
      RIR:      1.067
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.80          3.52        6.4154    1   1   0         4
                19.28         10.65        4.6033    2   0   0         2
                20.02          9.24        4.4346   -1   1   1         4
                20.43          3.63        4.3480    0   1   1         4
                26.49          1.68        3.3643   -1   2   1         4
                26.80         15.26        3.3261    0   2   1         4
                27.81         48.77        3.2077    2   2   0         4
                29.61        100.00        3.0165   -2   2   1         4
                30.65         37.91        2.9167   -3   1   1         4
                30.80         47.54        2.9028    3   1   0         4
                34.23          1.01        2.6199   -1   0   2         2
                34.85         45.08        2.5747   -1   3   1         4
                35.09          1.98        2.5574    0   3   1         4
                36.11         49.37        2.4877    0   0   2         2
                36.53         27.14        2.4598    2   2   1         4
                37.34          4.72        2.4084   -2   3   1         4
                38.02          3.20        2.3667    1   3   1         4
                40.40         12.85        2.2327    3   1   1         4
                40.45          3.74        2.2301    1   0   2         2
                40.69          2.05        2.2173   -2   2   2         4
                41.54          4.39        2.1740    0   2   2         4
                41.74          8.41        2.1639    1   1   2         4
                42.15         37.26        2.1440   -3   3   1         4
                42.26          2.76        2.1385    3   3   0         4
                42.78          7.84        2.1139   -4   2   1         4
                43.86          1.86        2.0641   -3   2   2         4
                44.26          3.20        2.0465    4   2   0         4
                44.34         14.68        2.0429   -4   0   2         2
                44.42          9.76        2.0396    0   4   1         4
                45.07          4.50        2.0114    2   4   0         4
                45.55          1.31        1.9916   -4   1   2         4
                46.28          4.23        1.9616   -2   4   1         4
                46.68         10.67        1.9457    2   0   2         2
                48.72          1.65        1.8690   -4   3   1         4
                50.01          3.05        1.8239    3   3   1         4
                50.61          3.33        1.8035    5   1   0         4
                51.15          1.69        1.7858    1   3   2         4
                51.20          9.17        1.7842    2   2   2         4
                51.30          2.13        1.7810    2   4   1         4
                52.08         11.20        1.7560    1   5   0         4
                52.96          3.02        1.7290    4   2   1         4
                53.96          1.81        1.6992   -1   1   3         4
                54.55          3.39        1.6822   -2   4   2         4
                54.91          3.57        1.6721   -3   1   3         4
                55.23          1.42        1.6630    0   4   2         4
                55.38          4.81        1.6590    3   1   2         4
                56.56         18.21        1.6272   -2   2   3         4
                56.64         25.44        1.6252   -5   3   1         4
                59.75          3.34        1.5476   -3   5   1         4
                59.84          5.14        1.5455    3   5   0         4
                59.96          6.52        1.5427   -6   0   2         2
                60.32          5.89        1.5344    6   0   0         2
                61.53          4.74        1.5072   -2   3   3         4
                62.00         13.96        1.4968   -1   3   3         4
                62.28         12.69        1.4907    0   6   0         2
                62.87          2.31        1.4782   -3   3   3         4
                62.91          1.22        1.4773   -1   5   2         4
                63.13          5.17        1.4727    4   0   2         2
                63.36          1.93        1.4678    2   4   2         4
                63.82          2.99        1.4584   -6   2   2         4
                64.12          1.70        1.4524    0   5   2         4
                65.86          5.09        1.4182   -3   5   2         4
                66.11          2.03        1.4134    3   5   1         4
                67.07          1.84        1.3954    1   5   2         4
                67.33         27.02        1.3907    5   3   1         4
                68.11          3.28        1.3766   -2   4   3         4
                68.24          4.95        1.3744    1   3   3         4
                68.58          1.17        1.3683   -7   1   1         4
                69.29          1.81        1.3561    2   2   3         4
                69.44          1.88        1.3535   -7   0   2         2
                70.35          6.49        1.3383   -7   1   2         4
                70.71          4.60        1.3323   -5   3   3         4
                70.72          1.34        1.3321    0   4   3         4
                72.36          2.13        1.3059   -3   0   4         2
                72.66          1.79        1.3012    7   1   0         4
                73.20          1.18        1.2930    6   2   1         4
                73.25          1.60        1.2922   -3   1   4         4
                73.82          1.10        1.2837    3   1   3         4
                73.86          1.63        1.2830    5   1   2         4
                74.15         10.18        1.2787    0   6   2         4
                74.30          4.17        1.2766   -4   0   4         2
                75.65          1.15        1.2571   -2   2   4         4
                76.07          1.17        1.2512    4   6   0         4
                76.60          2.11        1.2439    0   0   4         2
                77.39          1.49        1.2331   -3   5   3         4
                77.79          6.91        1.2278    3   5   2         4
                79.61          2.02        1.2042   -4   6   2         4
                81.31          1.62        1.1833    2   6   2         4
                82.25          1.06        1.1721    7   1   1         4
                82.72          1.02        1.1667   -8   2   1         4
                83.00          1.72        1.1634   -6   0   4         2
                84.12          1.53        1.1508    8   0   0         2
                89.66          1.42        1.0934   -8   2   3         4
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       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.