Niter
      Nimmo J, Lucas B
      Acta Crystallographica B32 (1976) 1968-1971
      The crystal structures of gamma- and beta-KNO3 and
      the alpha-gamma-beta phase transformations
      _cod_database_code 1000051
      _database_code_amcsd 0009568

      CELL PARAMETERS:    5.4870   5.4870   9.1560   90.000   90.000  120.000
      SPACE GROUP: R3m       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    238.730
      Density (g/cm3):      2.109
      MAX. ABS. INTENSITY / VOLUME**2:      17.99895884    
      RIR:      2.778
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                21.06          5.34        4.2177    1   0   1         3
                27.05        100.00        3.2969    0   1   2         3
                29.26         29.27        3.0520    0   0   3         1
                32.64         27.14        2.7435    1   1   0         6
                39.17         35.27        2.2998    0   2   1         3
                42.88         21.95        2.1088    2   0   2         3
                43.90         11.25        2.0622    1   0   4         3
                44.40         20.52        2.0403    1   1   3         6
                51.88          7.63        1.7625    2   1   1         6
                53.64         11.83        1.7087    0   1   5         3
                54.91          2.84        1.6720    1   2   2         6
                58.25          3.75        1.5840    3   0   0         3
                66.13          5.71        1.4130    2   1   4         6
                66.51          6.48        1.4059    0   3   3         3
                68.39          4.90        1.3717    2   2   0         6
                70.63          2.11        1.3336    1   1   6         6
                72.45          1.75        1.3045    1   3   1         6
                73.92          5.93        1.2822    1   2   5         6
                74.99          3.72        1.2665    3   1   2         6
                75.37          2.42        1.2611    1   0   7         3
                76.07          2.76        1.2512    2   2   3         6
                81.74          1.01        1.1781    4   0   1         3
                84.57          1.38        1.1458    0   2   7         3
                89.09          1.36        1.0990    3   0   6         3
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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.