Montebrasite
      Groat L A, Raudsepp M, Hawthorne F C, Ercit T S, Sherriff B L, Hartman J S
      American Mineralogist 75 (1990) 992-1008
      The amblygonite-montebrasite series: Characterization by single-crystal
      structure refinement, infrared spectroscopy and multinuclear MAS-NMR
      spectroscopy
      sample AF-46
      _database_code_amcsd 0001324

      CELL PARAMETERS:    6.6782   7.7159   6.9490   90.820  117.660   91.220
      SPACE GROUP: C-1       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    316.959
      Density (g/cm3):      3.067
      MAX. ABS. INTENSITY / VOLUME**2:      5.853308743    
      RIR:      0.621
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.40          3.42        6.1526    0   0   1         2
                18.62          8.27        4.7650   -1   1   0         2
                19.05         37.21        4.6594   -1   1   1         2
                19.14         70.62        4.6361   -1  -1   1         2
                19.20         27.89        4.6220    1   1   0         2
                23.07          9.94        3.8556    0   2   0         2
                26.71          2.08        3.3378   -2   0   1         2
                26.95         48.40        3.3080    0  -2   1         2
                27.47         34.48        3.2468    1  -1   1         2
                27.64         43.74        3.2277    0   2   1         2
                28.09         62.50        3.1770   -1  -1   2         2
                28.21         29.03        3.1634    1   1   1         2
                28.35         98.11        3.1479   -1   1   2         2
                29.03          4.32        3.0763    0   0   2         2
                30.23        100.00        2.9560    2   0   0         2
                30.70          8.03        2.9122   -2   0   2         2
                35.20         13.82        2.5499   -2   2   1         2
                35.95         25.25        2.4980   -2  -2   1         2
                36.88          9.31        2.4374    0  -2   2         2
                37.72         33.74        2.3849   -1   3   0         2
                37.76          2.07        2.3825   -2   2   0         2
                37.91          5.58        2.3733    0   2   2         2
                38.63          4.59        2.3305    1   3   0         2
                38.65          4.23        2.3297   -2   2   2         2
                38.97          5.33        2.3110    2   2   0         2
                39.48          9.40        2.2824    2   0   1         2
                40.22          3.11        2.2423   -2   0   3         2
                41.23          6.62        2.1895   -1   1   3         2
                42.83         22.24        2.1114    1  -3   1         2
                43.25          7.62        2.0919   -3  -1   2         2
                44.11          2.14        2.0529   -1   3   2         2
                44.33          5.92        2.0432    1   3   1         2
                45.48          2.24        1.9945    2  -2   1         2
                46.74         24.98        1.9433   -2  -2   3         2
                46.96          1.26        1.9350    2   2   1         2
                47.00          7.07        1.9333   -2   2   3         2
                47.14          6.83        1.9278    0   4   0         2
                47.24          5.03        1.9239   -3   1   0         2
                48.01         18.56        1.8950    3   1   0         2
                49.96          2.88        1.8254    0   4   1         2
                51.01         12.41        1.7905    0   2   3         2
                52.20          1.58        1.7523    1  -3   2         2
                52.81         20.85        1.7337   -2   0   4         2
                54.04          2.34        1.6969   -1   3   3         2
                54.74          1.36        1.6768   -3   3   2         2
                55.02          2.80        1.6689   -4   0   2         2
                55.33          4.31        1.6605   -1  -1   4         2
                55.56         11.78        1.6540    0  -4   2         2
                55.66          1.27        1.6512   -3  -3   2         2
                55.73          1.30        1.6493   -3  -3   1         2
                55.86          1.54        1.6459   -1   1   4         2
                56.10          5.35        1.6394    3  -1   1         2
                56.70          4.22        1.6234    2  -2   2         2
                56.97          2.10        1.6165    3   1   1         2
                57.07          6.80        1.6138    0   4   2         2
                57.16         14.51        1.6114   -2   4   2         2
                57.47          8.15        1.6037   -2  -4   2         2
                57.55          1.22        1.6014   -3  -1   4         2
                58.07         15.60        1.5883   -3   3   0         2
                58.34         14.54        1.5817    2   2   2         2
                58.66          8.96        1.5739   -2   2   4         2
                59.52          1.18        1.5531   -3   3   3         2
                60.05          9.48        1.5407    3   3   0         2
                60.16          2.29        1.5381    0   0   4         2
                60.95          8.92        1.5201   -4  -2   2         2
                61.92          1.03        1.4985    2  -4   1         2
                62.44          1.34        1.4874   -4   2   3         2
                62.88          9.13        1.4780    4   0   0         2
                62.90          3.79        1.4776   -4  -2   1         2
                63.08          1.47        1.4739   -4  -2   3         2
                63.93         11.36        1.4561   -4   0   4         2
                64.62          2.22        1.4423    0  -2   4         2
                65.19          2.71        1.4310    1  -5   1         2
                65.38          7.95        1.4275   -1  -3   4         2
                65.54          3.34        1.4242    0  -4   3         2
                65.99          8.10        1.4156   -1  -5   2         2
                66.68          7.35        1.4028   -1   5   2         2
                66.82          6.50        1.4001   -1   3   4         2
                67.10          3.49        1.3949   -4   2   0         2
                67.81          3.24        1.3820   -3  -3   4         2
                68.01          2.10        1.3784   -3   3   4         2
                68.05          5.28        1.3777    3  -1   2         2
                68.80          1.17        1.3646   -4   2   4         2
                69.73          3.95        1.3485   -3  -1   5         2
                70.49          1.81        1.3359    2  -2   3         2
                70.78          1.42        1.3312    1  -1   4         2
                71.27          2.25        1.3233    2  -4   2         2
                72.28          2.84        1.3072    2   2   3         2
                72.43          2.82        1.3048    1  -5   2         2
                72.81          1.77        1.2990   -2   2   5         2
                73.32          3.56        1.2912   -1  -5   3         2
                73.72          1.28        1.2852    0   6   0         2
                73.84          2.86        1.2833   -4   0   5         2
                74.16          5.07        1.2786    2   4   2         2
                74.23          4.76        1.2776   -3   5   1         2
                74.41         10.15        1.2750   -4   4   2         2
                74.78          1.85        1.2695   -1   5   3         2
                75.05          1.34        1.2657    1   5   2         2
                76.12          7.67        1.2505   -3  -5   2         2
                76.18          3.78        1.2497    4  -2   1         2
                76.23          3.10        1.2490   -4  -4   2         2
                76.34          1.62        1.2474   -3  -5   1         2
                76.58          4.72        1.2441   -5  -1   4         2
                78.15          3.44        1.2230   -4  -4   1         2
                78.59          1.38        1.2172   -4   2   5         2
                79.10          3.04        1.2107   -3   5   3         2
                79.42          3.85        1.2066    1  -3   4         2
                80.30          2.28        1.1956   -1  -3   5         2
                81.03          1.52        1.1866    0   4   4         2
                81.90          5.10        1.1762    1   3   4         2
                82.50          1.40        1.1692   -5  -3   3         2
                82.70          1.98        1.1669    3  -1   3         2
                82.84          1.62        1.1653    2   6   0         2
                83.03          2.39        1.1631    0   2   5         2
                83.03          2.78        1.1631    1  -5   3         2
                83.19          3.01        1.1613    2   0   4         2
                84.99          1.04        1.1412    4   0   2         2
                86.34          1.63        1.1268    1   5   3         2
                86.78          1.66        1.1222    2  -2   4         2
                88.61          1.73        1.1037    2   6   1         2
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.