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 M6116
      _database_code_amcsd 0001325

      CELL PARAMETERS:    6.6440   7.7440   6.9100   90.350  117.330   91.010
      SPACE GROUP: C-1       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    315.753
      Density (g/cm3):      3.111
      MAX. ABS. INTENSITY / VOLUME**2:      6.189391171    
      RIR:      0.648
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.43          1.18        6.1379    0   0   1         2
                18.70         12.45        4.7459   -1   1   0         2
                19.09         42.51        4.6499   -1   1   1         2
                19.12         36.61        4.6418    1   1   0         2
                19.23         62.87        4.6166   -1  -1   1         2
                22.98          7.39        3.8709    0   2   0         2
                27.04         45.94        3.2980    0  -2   1         2
                27.44         41.74        3.2508    0   2   1         2
                27.58         30.52        3.2337    1  -1   1         2
                28.07         29.76        3.1784    1   1   1         2
                28.29         54.52        3.1542   -1  -1   2         2
                28.39         87.22        3.1436   -1   1   2         2
                29.10          4.87        3.0689    0   0   2         2
                30.29        100.00        2.9504    2   0   0         2
                30.93          8.62        2.8916   -2   0   2         2
                35.31         13.38        2.5420   -2   2   1         2
                35.94         24.19        2.4991   -2  -2   1         2
                37.09          9.98        2.4238    0  -2   2         2
                37.70          6.48        2.3863    0   2   2         2
                37.72         31.55        2.3846   -1   3   0         2
                37.92          2.90        2.3730   -2   2   0         2
                38.08          1.61        2.3632   -1   3   1         2
                38.39          5.47        2.3447    1   3   0         2
                38.73          2.83        2.3249   -2   2   2         2
                38.80          4.63        2.3209    2   2   0         2
                39.50          7.19        2.2813    2   0   1         2
                40.50          1.61        2.2272   -2   0   3         2
                41.09          1.07        2.1969   -1  -1   3         2
                41.30          4.15        2.1862   -1   1   3         2
                42.97         25.22        2.1047    1  -3   1         2
                43.48          5.30        2.0814   -3  -1   2         2
                43.92          1.07        2.0613   -1   3   2         2
                43.97          9.02        2.0592    1   3   1         2
                45.68          2.54        1.9861    2  -2   1         2
                46.95          8.15        1.9355    0   4   0         2
                47.07         22.30        1.9305   -2  -2   3         2
                47.08          9.31        1.9304   -2   2   3         2
                47.43          5.85        1.9169   -3   1   0         2
                47.98         20.21        1.8960    3   1   0         2
                49.61          2.94        1.8375    0   4   1         2
                50.81         10.95        1.7970    0   2   3         2
                51.93          1.23        1.7609    2   0   2         2
                52.46          1.57        1.7442    1  -3   2         2
                53.14         21.70        1.7234   -2   0   4         2
                53.82          1.07        1.7032   -1   3   3         2
                54.91          1.67        1.6722   -3   3   2         2
                55.33          2.35        1.6603   -4   0   2         2
                55.61          1.91        1.6526   -3  -3   1         2
                55.68          4.92        1.6508   -1  -1   4         2
                55.74          1.26        1.6492   -3  -3   2         2
                55.74         10.07        1.6490    0  -4   2         2
                55.96          2.03        1.6432   -1   1   4         2
                56.27          4.53        1.6350    3  -1   1         2
                56.63          5.45        1.6254    0   4   2         2
                56.87          2.08        1.6191    3   1   1         2
                56.95          4.70        1.6169    2  -2   2         2
                57.06         12.42        1.6140   -2   4   2         2
                57.50          6.42        1.6029   -2  -4   2         2
                58.04         13.73        1.5892    2   2   2         2
                58.33         14.37        1.5820   -3   3   0         2
                58.74          7.22        1.5718   -2   2   4         2
                59.77          9.74        1.5473    3   3   0         2
                60.32          2.31        1.5345    0   0   4         2
                61.11          7.42        1.5164   -4  -2   2         2
                62.16          1.15        1.4934    2  -4   1         2
                62.80          1.44        1.4796   -4   2   3         2
                62.90          3.85        1.4776   -4  -2   1         2
                63.01          9.60        1.4752    4   0   0         2
                63.42          1.58        1.4668   -4  -2   3         2
                64.45         12.07        1.4458   -4   0   4         2
                65.02          1.62        1.4344    0  -2   4         2
                65.27          2.28        1.4295    1  -5   1         2
                65.85          7.62        1.4184   -1  -3   4         2
                65.90          3.03        1.4174    0  -4   3         2
                66.04          9.24        1.4148   -1  -5   2         2
                66.08          1.58        1.4139    3  -3   1         2
                66.29          9.05        1.4100   -1   5   2         2
                66.60          7.79        1.4042   -1   3   4         2
                67.10          1.31        1.3949    0   4   3         2
                67.41          2.81        1.3892   -4   2   0         2
                67.72          1.41        1.3836    3   3   1         2
                68.14          2.43        1.3762   -3   3   4         2
                68.22          4.88        1.3747    3  -1   2         2
                68.28          2.71        1.3736   -3  -3   4         2
                70.32          3.61        1.3387   -3  -1   5         2
                70.80          1.92        1.3308    2  -2   3         2
                71.03          1.48        1.3270    1  -1   4         2
                71.62          1.91        1.3176    2  -4   2         2
                71.96          2.52        1.3122    2   2   3         2
                72.69          3.59        1.3008    1  -5   2         2
                72.93          1.54        1.2972   -2   2   5         2
                73.38          1.22        1.2903    0   6   0         2
                73.54          3.85        1.2879    2   4   2         2
                73.59          3.23        1.2872   -1  -5   3         2
                74.30          1.44        1.2765   -1   5   3         2
                74.35          4.55        1.2759   -3   5   1         2
                74.36          2.17        1.2757    1   5   2         2
                74.46          1.58        1.2743   -4   0   5         2
                74.68          8.99        1.2710   -4   4   2         2
                74.83          1.71        1.2688   -3   5   2         2
                76.00          1.63        1.2522   -3  -5   1         2
                76.01          8.24        1.2520   -3  -5   2         2
                76.19          2.56        1.2495   -4  -4   2         2
                76.50          3.82        1.2453    4  -2   1         2
                77.17          4.68        1.2361   -5  -1   4         2
                77.90          3.07        1.2263   -4  -4   1         2
                79.03          2.84        1.2116   -3   5   3         2
                79.03          1.44        1.2116   -4   2   5         2
                79.91          3.28        1.2004    1  -3   4         2
                80.92          2.26        1.1880   -1  -3   5         2
                81.44          5.72        1.1817    1   3   4         2
                82.23          1.42        1.1723    2   6   0         2
                82.79          1.56        1.1659   -5  -3   3         2
                82.88          1.89        1.1648    0   2   5         2
                82.90          1.48        1.1646    3  -1   3         2
                83.25          3.65        1.1605    2   0   4         2
                83.47          2.40        1.1580    1  -5   3         2
                85.04          1.31        1.1407    4   0   2         2
                85.54          1.69        1.1352    1   5   3         2
                87.17          1.64        1.1182    2  -2   4         2
                87.79          1.02        1.1119    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.