Tychite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R060700
      Schmidt G R, Reynard J, Yang H, Downs R T
      Acta Crystallographica E62 (2006) i207-i209
      Tychite, Na6Mg2(SO4)(CO3)4: Structure analysis and Raman spectroscopic data
      Locality: Searles Lake, Trona, San Bernardino County, California, USA

      CELL PARAMETERS:  13.9038 13.9038 13.9038   90.000   90.000   90.000
      ALTERNATE SETTING FOR SPACE GROUP: Fd3       

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            S      0.12500   0.12500   0.12500     1.000     0.940
            Mg     0.00000   0.50000   0.00000     1.000     0.713
            C      0.03207   0.71793   0.03207     1.000     0.686
            Na     0.34379   0.12500   0.12500     1.000     1.512
            O      0.26626   0.22529   0.35333     1.000     0.968
            O      0.06362   0.06362   0.06362     1.000     1.538

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/- 12 +/- 12 +/- 12
            MAX. ABS. INTENSITY / VOLUME**2:      11.56671297    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                11.02          3.45        8.0274    1   1   1
                18.05          8.49        4.9157    2   2   0
                21.19         59.51        4.1922    3   1   1
                22.15          1.18        4.0137    2   2   2
                27.97         18.42        3.1898    3   3   1
                31.52          2.41        2.8381    4   2   2
                33.49         29.92        2.6758    3   3   3
                33.49         70.08        2.6758    5   1   1
                36.56         50.67        2.4579    4   4   0
                38.30          9.14        2.3502    5   3   1
                38.30          4.42        2.3502    5   1   3
                38.86          3.41        2.3173    4   4   2
                41.06          5.11        2.1984    6   0   2
                41.06          2.11        2.1984    6   2   0
                43.16          3.03        2.0961    6   2   2
                45.18         19.94        2.0068    4   4   4
                46.65         15.68        1.9469    7   1   1
                46.65          4.43        1.9469    5   5   1
                49.03          4.65        1.8580    6   4   2
                49.03          1.04        1.8580    6   2   4
                50.41          2.93        1.8101    5   5   3
                52.66         11.02        1.7380    8   0   0
                53.98          4.82        1.6986    7   3   3
                54.42          2.26        1.6861    6   4   4
                56.13          2.69        1.6386    6   6   0
                56.13          6.69        1.6386    8   2   2
                57.39         11.50        1.6055    7   1   5
                57.39         10.34        1.6055    5   5   5
                57.81         10.33        1.5949    6   6   2
                61.08          2.73        1.5170    8   2   4
                63.87          4.65        1.4575    9   3   1
                65.81          7.47        1.4191    8   4   4
                66.97          2.00        1.3974    7   7   1
                70.00          8.34        1.3441    9   5   1
                70.00          1.47        1.3441    9   1   5
                72.97          2.70        1.2965    9   3   5
                74.80          1.13        1.2692   10   2   4
                75.89          1.05        1.2537    7   7   5
                77.70          5.52        1.2289    8   8   0
                80.57          2.00        1.1922   10   0   6
                81.64          1.32        1.1793    9   3   7
                84.48          1.02        1.1468   11   5   1
                86.25          3.88        1.1277   10   6   4
                86.25          1.06        1.1277   10   4   6
                87.31          1.31        1.1168    9   5   7
                89.07          1.55        1.0992   12   4   0
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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.