Heulandite-Ca
      Mortier W J, Pearce J R
      American Mineralogist 66 (1981) 309-314
      Thermal stability of the heulandite-type framework: Crystal structure of the
      calcium/ammonium form dehydrated at 483K

      CELL PARAMETERS:  17.1580 17.4330  7.3880   90.000  113.410   90.000
      SPACE GROUP: C2/m      
      X-RAY WAVELENGTH:     1.541838
      MAX. ABS. INTENSITY / VOLUME**2:      13.93400550    
               2-THETA      INTENSITY    D-SPACING   H   K   L
                 7.57          1.53       11.6850    1   1   0
                10.15        100.00        8.7165    0   2   0
                11.24         50.78        7.8728    2   0   0
                13.02          7.78        6.7986   -1   1   1
                13.06          6.59        6.7799    0   0   1
                13.43          2.85        6.5935   -2   0   1
                15.16         14.25        5.8425    2   2   0
                16.26          4.35        5.4516    1   3   0
                16.94          7.00        5.2326    1   1   1
                17.52         25.39        5.0626   -3   1   1
                19.44          6.73        4.5663   -1   3   1
                20.40          5.27        4.3529    2   0   1
                21.12          1.38        4.2064   -4   0   1
                22.59          8.46        3.9364    4   0   0
                22.73         20.64        3.9121   -3   3   1
                22.83         12.81        3.8950    3   3   0
                22.84          6.33        3.8943    2   2   1
                23.33         11.68        3.8130    2   4   0
                23.48          2.10        3.7884   -4   2   1
                24.11          1.55        3.6916   -2   0   2
                24.28          1.20        3.6661    0   4   1
                25.10          5.52        3.5476   -1   1   2
                25.50          1.14        3.4932   -3   1   2
                26.22         10.94        3.3993   -2   2   2
                26.29          7.59        3.3899    0   0   2
                26.54          3.38        3.3583   -5   1   1
                27.05          3.11        3.2968   -4   0   2
                28.25          9.03        3.1594    0   2   2
                28.99          3.73        3.0799    2   4   1
                29.39          4.30        3.0390   -3   3   2
                29.52          1.92        3.0257    1   1   2
                30.38          5.10        2.9425    1   5   1
                30.45          1.71        2.9353    4   0   1
                30.54          1.08        2.9271   -5   1   2
                30.71          4.36        2.9113   -3   5   1
                30.79          3.36        2.9042    3   5   0
                32.18          3.52        2.7818    4   2   1
                32.33          6.07        2.7687    5   3   0
                33.56          1.83        2.6706    0   6   1
                33.71          4.25        2.6588   -2   6   1
                33.90          1.43        2.6441   -5   3   2
                35.46          1.18        2.5313   -6   2   2
                36.23          1.22        2.4796    3   5   1
                36.80          1.05        2.4424   -5   5   1
                37.13          1.23        2.4212   -7   1   1
                37.18          2.26        2.4182   -4   0   3
                37.62          1.25        2.3908   -6   4   1
                38.52          1.25        2.3370    5   5   0
                41.85          1.33        2.1587   -5   3   3
                45.02          1.58        2.0137   -5   7   1
                45.37          1.41        1.9990    3   5   2
                46.69          1.09        1.9453    6   4   1
                52.51          1.08        1.7429    3   7   2
                54.44          1.12        1.6854   -2  10   1
                58.67          1.16        1.5737   -9   5   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.