Trona
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern R050228
      Choi C S, Mighell A D
      Acta Crystallographica B38 (1982) 2874-2876
      Neutron diffraction study of sodium sesquicarbonate dihydrate
      Note: H3 disordered model, this is the prefered model

      CELL PARAMETERS:   20.41014   3.490429   10.32979   90.00000   106.4539   90.00000
      SPACE GROUP: C2/c
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                 9.05         26.42        9.7872    2   0   0
                17.91          2.73        4.9534    0   0   2
                18.13         16.16        4.8936    4   0   0
                22.29          4.79        3.9879    2   0   2
                25.93          2.18        3.4362    1   1   0
                27.33          1.59        3.2624    6   0   0
                27.90         24.12        3.1976    1   1   1
                28.17          1.47        3.1677   -6   0   2
                29.01          6.84        3.0777    3   1   0
                29.05         43.53        3.0731    4   0   2
                29.21         27.16        3.0572   -3   1   1
                32.11          5.02        2.7864   -3   1   2
                32.43         15.55        2.7598    1   1   2
                33.88        100.00        2.6452   -5   1   1
                34.41          1.42        2.6053    5   1   0
                34.74          6.72        2.5812   -2   0   4
                35.68          1.71        2.5154   -4   0   4
                35.78         11.35        2.5089   -5   1   2
                36.35          4.12        2.4704    3   1   2
                36.78         33.07        2.4424   -1   1   3
                37.03          3.72        2.4270    6   0   2
                37.16          7.21        2.4184   -3   1   3
                39.98         23.93        2.2540    2   0   4
                41.34          1.88        2.1831   -7   1   2
                42.10          4.30        2.1452    5   1   2
                42.74          2.10        2.1149    3   1   3
                44.03          4.28        2.0559   -8   0   4
                44.39         15.46        2.0399   -7   1   3
                44.68         17.34        2.0273  -10   0   2
                45.47          5.61        1.9939    4   0   4
                45.51          2.51        1.9923   -5   1   4
                46.22          9.15        1.9634    1   1   4
                46.37          2.04        1.9574   10   0   0
                48.28          5.80        1.8843   -9   1   2
                49.14          1.37        1.8531   -7   1   4
                49.35          1.51        1.8459    9   1   0
                51.38         13.01        1.7776   -3   1   5
                52.40          6.00        1.7452    0   2   0
                52.46          1.02        1.7434   -5   1   5
                52.54         13.72        1.7409    9   1   1
                53.29          1.14        1.7181    2   2   0
                53.27          2.66        1.7189   -4   0   6
                54.35          1.55        1.6871   -9   1   4
                54.64          4.83        1.6788    2   2   1
                55.09          1.05        1.6663   10   0   2
                55.28          2.48        1.6610   -7   1   5
                55.32         12.24        1.6597    7   1   3
                55.64          1.53        1.6511    0   0   6
                55.72          1.51        1.6488   -2   2   2
                55.78          3.50        1.6471   -4   2   1
                55.82          1.19        1.6460    0   2   2
                57.68          5.64        1.5973    4   2   1
                57.82          6.37        1.5939   -8   0   6
                58.22          1.98        1.5838  -12   0   4
                59.36          1.73        1.5562   -2   2   3
                59.51          1.13        1.5524   -6   2   1
                61.02          4.51        1.5176    4   2   2
                62.24          1.43        1.4907    6   2   1
                66.09          1.58        1.4129  -13   1   3
                66.24          2.04        1.4101   11   1   2
                66.88          3.72        1.3982   14   0   0
                67.88          2.05        1.3799    2   2   4
                68.41          1.30        1.3706  -12   0   6
                69.22          1.67        1.3565   -3   1   7
                69.28          1.66        1.3554   -5   1   7
                70.73          1.59        1.3312   -2   2   5
                70.89          1.21        1.3285    6   2   3
                70.84          2.50        1.3293    6   0   6
                71.26          1.18        1.3226  -10   2   2
                72.43          1.04        1.3041  -13   1   5
                74.89          1.41        1.2672    2   2   5
                76.39          1.03        1.2459  -16   0   4
                82.12          1.11        1.1729  -12   2   4
                86.00          1.73        1.1297  -12   2   5
                88.02          1.32        1.1089   11   1   5
                88.02          1.32        1.1089   11   1   5
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.