Natrite
      Arakcheeva A, Bindi L, Pattison P, Meisser N, Chapuis G, Pekov I
      American Mineralogist 95 (2010) 574-581
      The incommensurately modulated structures of natural natrite at 120
      and 293 K from synchrotron X-ray data
      Locality: Mt. Koashva, Lovozero massif, Kola peninsula, Russia
      T = 293 K
      _database_code_amcsd 0005044

      CELL PARAMETERS:    8.8818   5.2350   6.0455   90.000  101.464   90.000
      SPACE GROUP: C2/m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    275.485
      Density (g/cm3):      2.525
      MAX. ABS. INTENSITY / VOLUME**2:      4.134795801    
      RIR:      0.533
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.79          1.31        4.4862    1   1   0         4
                22.82          3.95        3.8965   -2   0   1         2
                23.62          6.39        3.7671   -1   1   1         4
                26.11         18.87        3.4123    1   1   1         4
                27.74         23.36        3.2159    2   0   1         2
                30.17         85.35        2.9624    0   0   2         2
                33.02         13.10        2.7126   -2   0   2         2
                34.26         48.63        2.6175    0   2   0         2
                34.53         49.45        2.5975   -1   1   2         4
                35.37        100.00        2.5378    3   1   0         4
                36.00          1.07        2.4951   -3   1   1         4
                37.57          5.37        2.3943    0   2   1         4
                38.08         96.15        2.3633    1   1   2         4
                40.08         48.25        2.2498    2   0   2         2
                40.20          5.80        2.2431    2   2   0         4
                41.25         31.01        2.1883   -4   0   1         2
                41.56         49.58        2.1728   -2   2   1         4
                42.70          1.13        2.1178   -3   1   2         4
                44.64         25.05        2.0301    2   2   1         4
                46.62         27.07        1.9483   -4   0   2         2
                47.27          7.18        1.9228    4   0   1         2
                48.32         51.56        1.8836   -2   2   2         4
                48.42          2.37        1.8800   -1   1   3         4
                51.32          2.88        1.7804    3   1   2         4
                53.56          7.71        1.7110    1   3   0         4
                53.62          2.82        1.7093   -3   1   3         4
                53.72         23.21        1.7062    2   2   2         4
                54.72          2.74        1.6774    2   0   3         2
                54.86         11.68        1.6734    4   2   0         4
                55.64          6.00        1.6520    5   1   0         4
                56.34          9.25        1.6329   -4   0   3         2
                56.57          1.42        1.6269    1   3   1         4
                57.30          9.87        1.6080    4   0   2         2
                58.55          4.74        1.5765    0   2   3         4
                58.63          3.83        1.5746   -5   1   2         4
                59.07          8.50        1.5639   -2   2   3         4
                59.11          6.01        1.5629   -4   2   2         4
                61.00          1.68        1.5189    5   1   1         4
                62.04          4.13        1.4958   -2   0   4         2
                62.07          8.41        1.4954    3   3   0         4
                62.48          2.40        1.4865   -3   3   1         4
                62.73         11.85        1.4812    0   0   4         2
                62.85          2.03        1.4787   -6   0   1         2
                63.88          7.14        1.4572    1   3   2         4
                64.20          2.68        1.4508    6   0   0         2
                65.98          2.88        1.4159    3   3   1         4
                66.17          1.77        1.4123    2   2   3         4
                67.44          7.35        1.3887   -3   1   4         4
                69.73          1.90        1.3486    6   0   1         2
                70.28          2.94        1.3394    5   1   2         4
                72.18          8.56        1.3088    0   4   0         2
                73.46          3.93        1.2891    0   2   4         4
                74.83         11.54        1.2689    6   2   0         4
                74.83          1.21        1.2689    1   3   3         4
                76.33          2.74        1.2475   -6   2   2         4
                79.59          2.69        1.2045   -7   1   2         4
                80.00          4.11        1.1993   -5   3   2         4
                80.18          1.01        1.1971    0   4   2         4
                80.58          9.09        1.1922    3   1   4         4
                81.69          2.15        1.1787   -2   4   2         4
                83.49          1.46        1.1578   -6   0   4         2
                84.90          1.99        1.1422   -1   3   4         4
                85.92          3.72        1.1313    2   4   2         4
                86.68          1.20        1.1232   -4   4   1         4
                87.90          4.10        1.1108   -3   3   4         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.