Shortite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050248
      Dickens B, Hyman A, Brown W E
      Journal of Research of the National Bureau of Standards - Physics and Chemistry 75A (1971) 129-135
      Crystal structure of Ca2Na2(CO3)3 (shortite)
      Note: Y- and z-coordinates of Ca adjusted to match reported bond lengths

      CELL PARAMETERS:   4.947000   11.03200   7.108000   90.00000   90.00000   90.00000
      SPACE GROUP: Amm2
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                14.82         39.49        5.9825    0   1   1
                16.07         52.50        5.5210    0   2   0
                17.91         61.68        4.9554    1   0   0
                23.31         45.38        3.8162    1   1   1
                24.14          1.70        3.6878    1   2   0
                25.03         20.84        3.5589    0   0   2
                27.28         19.98        3.2694    0   3   1
                29.87         16.62        2.9913    0   2   2
                30.93         16.33        2.8906    1   0   2
                32.43         10.68        2.7605    0   4   0
                32.82         23.31        2.7290    1   3   1
                35.04        100.00        2.5609    1   2   2
                36.25         48.09        2.4777    2   0   0
                37.28          5.81        2.4116    1   4   0
                38.81         21.37        2.3196    0   1   3
                39.35         16.49        2.2891    2   1   1
                41.38         38.90        2.1812    0   4   2
                42.87         29.91        2.1092    0   5   1
                43.04          8.10        2.1009    1   1   3
                44.55         32.21        2.0334    2   0   2
                45.42         19.91        1.9964    1   4   2
                45.47         27.50        1.9942    0   3   3
                45.94         23.26        1.9747    2   3   1
                46.80          5.64        1.9407    1   5   1
                47.64         17.78        1.9081    2   2   2
                49.24          5.02        1.8500    1   3   3
                49.41         27.56        1.8439    2   4   0
                49.51          4.30        1.8403    0   6   0
                51.33          4.14        1.7794    0   0   4
                53.06          1.65        1.7252    1   6   0
                54.13          6.65        1.6936    0   2   4
                54.14         10.61        1.6933    2   1   3
                54.79          8.46        1.6747    1   0   4
                55.62          4.62        1.6518    3   0   0
                56.16          8.95        1.6372    2   4   2
                56.25          3.25        1.6347    0   6   2
                56.94          6.10        1.6165    0   5   3
                57.34         19.18        1.6061    2   5   1
                57.48         13.93        1.6026    1   2   4
                59.52          3.37        1.5524    1   6   2
                60.05          5.80        1.5401    0   7   1
                60.19          2.05        1.5368    1   5   3
                63.02          2.84        1.4743    3   3   1
                63.20          7.71        1.4707    1   7   1
                64.40          9.26        1.4460    3   2   2
                64.44          1.58        1.4453    2   0   4
                65.12          3.00        1.4318    1   4   4
                66.88          3.37        1.3982    2   2   4
                68.76          2.07        1.3645    2   6   2
                69.15          2.46        1.3578    1   1   5
                69.38          5.05        1.3538    2   5   3
                69.87          1.58        1.3455    3   1   3
                71.63          4.48        1.3168    3   4   2
                71.83          1.04        1.3136    0   7   3
                72.18          2.86        1.3080    2   7   1
                72.67          1.24        1.3005    3   5   1
                73.85          2.97        1.2825    1   3   5
                73.99          3.58        1.2804    2   4   4
                74.72          2.21        1.2697    1   7   3
                76.43          2.17        1.2455    1   8   2
                76.92          7.06        1.2388    4   0   0
                79.06          2.57        1.2106    3   0   4
                79.18          2.13        1.2091    0   9   1
                80.17          1.44        1.1965    0   5   5
                81.32          4.56        1.1825    3   2   4
                81.98          1.04        1.1746    1   9   1
                82.35          1.02        1.1703    2   3   5
                82.97          9.32        1.1631    1   5   5
                83.08          1.76        1.1619    3   6   2
                83.19          6.49        1.1606    2   7   3
                83.26          1.80        1.1598    0   2   6
                83.80          2.29        1.1537    1   0   6
                84.62          1.09        1.1446    4   2   2
                85.35          1.61        1.1367    2   6   4
                85.95          1.10        1.1302    4   4   0
                86.04          1.76        1.1293    1   2   6
                86.31          3.27        1.1264    3   7   1
                88.49          1.03        1.1042    0  10   0
                89.67          1.59        1.0928    4   1   3
                89.67          1.59        1.0928    4   1   3
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.