Stellerite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R060483
      Sacerdoti M, Gomedi I
      Bulletin de Mineralogie 107 (1984) 799-804
      Crystal structural refinement of Ca-exchanged barrerite
      Note: made from natural barrierite in the lab
      Locality: Capo Pula, Sardegna, Italy

      CELL PARAMETERS:   13.59470   18.18230   17.83350   90.00000   90.00000   90.00000
      SPACE GROUP: Fmmm
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                 9.49          1.87        9.3433    1   1   1
                 9.75        100.00        9.0958    0   2   0
                 9.97         21.02        8.8933    0   0   2
                12.88          1.15        6.8860    2   0   0
                13.95          1.59        6.3589    0   2   2
                16.16          2.91        5.4902    2   2   0
                16.30          7.18        5.4447    2   0   2
                16.75          4.12        5.2978    1   3   1
                19.01         48.06        4.6717    2   2   2
                19.98          3.48        4.4466    0   0   4
                20.58         31.25        4.3180    3   1   1
                21.95         57.12        4.0516    1   3   3
                21.97         12.33        4.0491    0   4   2
                22.27         10.40        3.9948    0   2   4
                23.83         20.57        3.7355    2   0   4
                25.53          9.20        3.4904    2   4   2
                25.89         14.27        3.4430    4   0   0
                26.35         17.86        3.3841    1   1   5
                27.71         16.55        3.2200    4   2   0
                28.07          2.01        3.1794    0   4   4
                27.79         18.36        3.2108    4   0   2
                28.67         12.02        3.1144    3   3   3
                29.47          2.11        3.0319    0   6   0
                29.53         39.66        3.0252    1   5   3
                29.84         25.26        2.9949    1   3   5
                29.51         12.64        3.0277    4   2   2
                30.15          2.27        2.9644    0   0   6
                31.17          1.55        2.8697    0   6   2
                31.75          2.76        2.8185    0   2   6
                32.27         15.21        2.7749    2   6   0
                32.91         10.01        2.7223    4   0   4
                34.38          4.37        2.6085    2   2   6
                34.19          2.12        2.6230    4   4   2
                34.39          1.97        2.6080    4   2   4
                34.92         11.53        2.5697    3   5   3
                35.18          1.76        2.5510    3   3   5
                35.52          1.10        2.5278    1   7   1
                35.85          2.24        2.5050    0   6   4
                36.17          4.51        2.4834    0   4   6
                36.29          2.47        2.4755    1   1   7
                36.30          6.02        2.4748    5   1   3
                38.23          1.90        2.3541    2   6   4
                38.38          1.73        2.3454    1   7   3
                38.98          1.46        2.3103    1   3   7
                39.25          2.95        2.2953    6   0   0
                40.57          1.76        2.2233    0   0   8
                40.89          2.79        2.2067    3   1   7
                40.53          1.02        2.2256    6   2   0
                41.82          1.02        2.1597    0   2   8
                41.77          1.71        2.1624    5   1   5
                42.65          1.90        2.1196    0   6   6
                42.73          1.12        2.1158    2   0   8
                43.11          2.46        2.0983    2   8   2
                43.35          1.24        2.0873    3   3   7
                43.93          2.71        2.0607    2   2   8
                43.95          3.29        2.0598    1   5   7
                43.96          1.82        2.0593    5   5   3
                44.18          7.19        2.0497    5   3   5
                44.19          1.66        2.0491    6   4   0
                44.76          1.03        2.0246    0   8   4
                45.57          1.42        1.9902    6   2   4
                48.00          1.18        1.8950    1   9   3
                47.93          2.36        1.8975    4   8   0
                48.42          1.12        1.8797    5   7   1
                48.72          2.20        1.8687    5   5   5
                50.14          3.26        1.8192    0  10   0
                50.52          1.84        1.8062    3   1   9
                50.58          2.10        1.8043    0   8   6
                51.36          2.70        1.7787    0   0  10
                50.93          2.31        1.7925    6   6   2
                51.17          1.49        1.7846    7   3   3
                52.75          1.40        1.7351    2   6   8
                53.06          1.80        1.7254    2  10   2
                53.19          1.35        1.7215    8   0   0
                53.44          3.68        1.7140    7   1   5
                54.29          1.45        1.6893    3   7   7
                54.21          3.01        1.6915    8   2   0
                55.00          3.51        1.6692    5   7   5
                55.27          1.79        1.6617    8   2   2
                58.00          2.57        1.5897    0   8   8
                57.38          1.20        1.6054    8   0   4
                57.98          4.41        1.5902    4   6   8
                58.01          1.64        1.5894    6   8   2
                58.68          1.25        1.5729    6   2   8
                59.09          1.49        1.5629    1   7   9
                59.53          1.37        1.5524    1   3  11
                59.34          1.89        1.5569    4   2  10
                59.61          1.16        1.5505    0  10   6
                59.67          1.51        1.5490    2   8   8
                64.54          3.03        1.4433    4   8   8
                64.74          1.17        1.4393    9   3   3
                65.20          1.23        1.4304    7   5   7
                67.95          1.23        1.3790    5  11   3
                69.84          1.94        1.3462    8   2   8
                70.43          1.16        1.3363    8   6   6
                71.62          2.00        1.3171    5  11   5
                72.50          1.38        1.3032    4  10   8
                71.99          1.84        1.3112    9   5   5
                77.32          1.22        1.2335    3   5  13
                76.71          1.07        1.2418    8   6   8
                82.56          1.15        1.1679    8   8   8
                82.56          1.15        1.1679    8   8   8
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.