Gmelinite-Ca
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R060168
      Sacerdoti M, Passaglia E, Carnevali R
      Zeolites 15 (1995) 276-281
      Structural refinements of Na-, K-, and Ca-exchanged gmelinites
      Note: sample 3Ca

      CELL PARAMETERS:   13.80700   13.80700   9.792000   90.00000   90.00000   120.0000
      SPACE GROUP: P6_3/mmc
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                 7.46        100.00       11.8993    1   0   0
                11.56          8.86        7.6774    1   0   1
                12.91          2.91        6.8701    1   1   0
                14.92          3.43        5.9496    2   0   0
                17.35          3.04        5.1196    2   0   1
                17.68         16.50        5.0244    0   0   2
                19.20          2.15        4.6287    1   0   2
                19.76          3.52        4.4975    2   1   0
                21.67         21.59        4.1051    2   1   1
                23.19          1.06        3.8387    2   0   2
                25.96          3.79        3.4350    2   2   0
                27.03          1.31        3.3003    3   1   0
                27.68         11.50        3.2243    1   0   3
                30.05         11.86        2.9748    4   0   0
                30.64          1.93        2.9188    2   0   3
                31.37          7.57        2.8525    4   0   1
                31.56          1.55        2.8357    2   2   2
                33.36         10.93        2.6864    2   1   3
                34.55          3.07        2.5966    4   1   0
                39.35          1.01        2.2900    3   3   0
                43.43          4.20        2.0838    3   3   2
                46.83          1.24        1.9400    5   0   3
                49.68          1.97        1.8349    2   1   5
                51.15          1.58        1.7857    6   1   1
                50.55          2.22        1.8055    4   1   4
                53.33          3.04        1.7175    4   4   0
                52.99          1.13        1.7277    5   0   4
                57.77          1.83        1.5955    6   1   3
                67.52          1.22        1.3868    5   4   3
                66.40          1.56        1.4074    4   1   6
                71.31          1.40        1.3221    9   0   0
                73.18          1.04        1.2929    4   0   7
                73.18          1.04        1.2929    4   0   7
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.