Weeksite
      Stohl F V, Smith D K
      American Mineralogist 66 (1981) 610-625
      The crystal chemistry of the uranyl silicate minerals
      Locality: Anderson mine, Yavapai County, Arizona, USA
      _database_code_amcsd 0000839

      CELL PARAMETERS:    7.1060  17.9000   7.0870   90.000   90.000   90.000
      SPACE GROUP: Amm2      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    901.448
      Density (g/cm3):      2.786
      MAX. ABS. INTENSITY / VOLUME**2:      109.2466817    
      RIR:     12.770
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 9.88         59.61        8.9500    0   2   0         2
                12.46        100.00        7.1060    1   0   0         2
                13.44          2.45        6.5893    0   1   1         2
                15.93         36.42        5.5652    1   2   0         4
                18.36          3.89        4.8317    1   1   1         4
                19.45         23.27        4.5644    0   3   1         2
                23.16         19.65        3.8404    1   3   1         4
                25.06         10.93        3.5530    2   0   0         2
                25.13         17.35        3.5435    0   0   2         1
                27.00          9.92        3.3023    2   2   0         4
                27.06          7.09        3.2947    0   2   2         2
                27.92         20.96        3.1954    0   5   1         2
                28.14         17.56        3.1711    1   0   2         2
                28.54          2.95        3.1273    2   1   1         4
                29.89          9.69        2.9890    1   2   2         4
                29.95          1.00        2.9833    0   6   0         2
                30.68         22.31        2.9143    1   5   1         4
                31.92          4.95        2.8037    2   3   1         4
                32.55          1.64        2.7507    1   6   0         4
                35.79          5.05        2.5090    2   0   2         2
                37.22          5.58        2.4159    2   2   2         4
                37.39          4.69        2.4054    0   7   1         2
                37.87          7.33        2.3759    2   5   1         4
                37.99          4.42        2.3687    3   0   0         2
                39.35          4.59        2.2898    3   2   0         4
                39.44          1.25        2.2847    2   6   0         4
                39.55          8.15        2.2784    1   7   1         4
                40.31          3.59        2.2375    0   8   0         2
                40.47          1.48        2.2290    3   1   1         4
                41.10          4.31        2.1964    0   3   3         2
                42.35          4.07        2.1342    1   8   0         4
                43.02          3.34        2.1024    3   3   1         4
                43.11          5.92        2.0985    1   3   3         4
                45.54          6.18        1.9918    2   7   1         4
                46.03          5.55        1.9717    0   5   3         2
                46.09          3.08        1.9692    3   0   2         2
                46.44          1.14        1.9554    2   1   3         4
                47.26          3.58        1.9232    3   2   2         4
                47.80          4.98        1.9029    3   5   1         4
                47.88          7.72        1.9000    1   5   3         4
                48.05          1.41        1.8933    2   8   0         4
                48.09          2.49        1.8919    0   8   2         2
                48.74          3.08        1.8683    2   3   3         4
                49.88          2.85        1.8282    1   8   2         4
                51.02          1.32        1.7900    0  10   0         2
                51.44          2.48        1.7765    4   0   0         2
                51.59          2.08        1.7717    0   0   4         1
                52.52          1.83        1.7425    4   2   0         4
                52.66          1.21        1.7380    0   2   4         2
                52.74          1.96        1.7358    1  10   0         4
                52.75          1.51        1.7352    0   7   3         2
                53.12          4.00        1.7241    2   5   3         4
                53.29          3.01        1.7191    1   0   4         2
                54.34          2.18        1.6883    1   2   4         4
                54.36          4.04        1.6877    3   7   1         4
                54.43          2.89        1.6857    1   7   3         4
                54.99          1.04        1.6699    2   8   2         4
                55.51          2.17        1.6555    4   3   1         4
                56.58          1.08        1.6265    3   8   0         4
                57.20          2.08        1.6106    3   3   3         4
                57.66          1.22        1.5986    2  10   0         4
                57.70          1.47        1.5977    0  10   2         2
                58.08          2.24        1.5881    4   0   2         2
                58.18          1.62        1.5855    2   0   4         2
                59.08          1.71        1.5637    4   2   2         4
                59.18          1.83        1.5612    2   2   4         4
                59.26          2.60        1.5592    2   7   3         4
                59.28          2.29        1.5588    1  10   2         4
                59.54          3.55        1.5527    4   5   1         4
                61.16          2.85        1.5154    3   5   3         4
                63.88          1.56        1.4572    2  10   2         4
                65.30          1.88        1.4290    4   7   1         4
                65.83          1.14        1.4188    3   0   4         2
                66.76          1.32        1.4013    3   2   4         4
                66.84          1.89        1.3998    3   7   3         4
                67.85          1.39        1.3813    4   3   3         4
                68.88          1.20        1.3632    1   8   4         4
                69.66          1.09        1.3498    1  12   2         4
                71.19          1.31        1.3246    3  10   2         4
                71.48          2.14        1.3198    4   5   3         4
                71.53          1.07        1.3191    5   0   2         2
                72.84          1.60        1.2986    5   5   1         4
                73.02          1.30        1.2958    1   5   5         4
                76.79          1.02        1.2413    4   7   3         4
                76.89          1.02        1.2399    1  10   4         4
                83.93          1.21        1.1529    5   5   3         4
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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.