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-43
      _database_code_amcsd 0001321

      CELL PARAMETERS:    6.7130   7.7110   7.0102   91.220  117.910   91.670
      SPACE GROUP: C-1       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    320.280
      Density (g/cm3):      3.029
      MAX. ABS. INTENSITY / VOLUME**2:      5.588348338    
      RIR:      0.601
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.31          6.21        6.1900    0   0   1         2
                18.48          8.21        4.8006   -1   1   0         2
                18.95         31.37        4.6840   -1   1   1         2
                19.06         71.05        4.6554   -1  -1   1         2
                19.30         21.43        4.5994    1   1   0         2
                23.10          9.03        3.8508    0   2   0         2
                26.57          4.72        3.3549   -2   0   1         2
                26.78         50.93        3.3293    0  -2   1         2
                27.25         44.82        3.2721    1  -1   1         2
                27.76         46.61        3.2132    0   2   1         2
                27.82         62.28        3.2074   -1  -1   2         2
                28.22        100.00        3.1628   -1   1   2         2
                28.31         28.63        3.1528    1   1   1         2
                28.85          3.82        3.0950    0   0   2         2
                30.16         92.36        2.9632    2   0   0         2
                30.45          7.58        2.9360   -2   0   2         2
                34.96         13.38        2.5663   -2   2   1         2
                36.01         24.91        2.4944   -2  -2   1         2
                36.52          8.92        2.4604    0  -2   2         2
                37.47          1.35        2.4003   -2   2   0         2
                37.56         36.90        2.3947   -1   3   0         2
                38.01          6.76        2.3671    0   2   2         2
                38.44          5.73        2.3420   -2   2   2         2
                38.84          3.60        2.3186    1   3   0         2
                39.17          7.66        2.2997    2   2   0         2
                39.39         11.17        2.2874    2   0   1         2
                39.84          5.52        2.2625   -2   0   3         2
                41.02         10.01        2.2003   -1   1   3         2
                42.50         23.95        2.1268    1  -3   1         2
                43.06          9.65        2.1008   -3  -1   2         2
                44.14          3.81        2.0516   -1   3   2         2
                44.64          4.34        2.0300    1   3   1         2
                45.10          1.39        2.0101    2  -2   1         2
                46.35         26.87        1.9589   -2  -2   3         2
                46.76          4.86        1.9426   -2   2   3         2
                46.98          4.28        1.9342   -3   1   0         2
                47.20          1.73        1.9258    2   2   1         2
                47.21          6.79        1.9254    0   4   0         2
                47.88          1.28        1.8999   -3   1   3         2
                48.05         16.85        1.8934    3   1   0         2
                50.17          2.15        1.8183    0   4   1         2
                51.04         13.28        1.7895    0   2   3         2
                51.71          1.62        1.7679    1  -3   2         2
                52.31         19.36        1.7490   -2   0   4         2
                54.06          3.33        1.6964   -1   3   3         2
                54.39          1.21        1.6868   -3   3   2         2
                54.72          3.75        1.6774   -4   0   2         2
                54.77          4.09        1.6761   -1  -1   4         2
                55.18         12.05        1.6647    0  -4   2         2
                55.55          1.34        1.6545   -1   1   4         2
                55.64          1.07        1.6519   -3  -3   2         2
                55.80          7.07        1.6475    3  -1   1         2
                56.23          4.33        1.6360    2  -2   2         2
                56.99          1.97        1.6158   -3  -1   4         2
                57.02          2.76        1.6150    3   1   1         2
                57.03         15.43        1.6148   -2   4   2         2
                57.35          6.94        1.6066    0   4   2         2
                57.40          8.78        1.6054   -2  -4   2         2
                57.60         17.20        1.6002   -3   3   0         2
                58.35          9.93        1.5814   -2   2   4         2
                58.55         15.78        1.5764    2   2   2         2
                59.18          1.83        1.5613   -3   3   3         2
                59.76          1.98        1.5475    0   0   4         2
                60.38          9.06        1.5331    3   3   0         2
                60.87         10.86        1.5220   -4  -2   2         2
                61.41          1.35        1.5098    2  -4   1         2
                61.93          1.14        1.4983   -4   2   3         2
                62.71          7.62        1.4816    4   0   0         2
                62.97          3.45        1.4760   -4  -2   1         2
                63.36         10.39        1.4680   -4   0   4         2
                63.94          2.98        1.4559    0  -2   4         2
                64.67          7.88        1.4413   -1  -3   4         2
                64.84          2.70        1.4380    1  -5   1         2
                64.92          4.06        1.4363    0  -4   3         2
                65.79          8.53        1.4195   -1  -5   2         2
                66.62          3.98        1.4038   -4   2   0         2
                66.78          5.00        1.4008   -1   3   4         2
                66.82          7.05        1.4002   -1   5   2         2
                67.27          3.59        1.3918   -3  -3   4         2
                67.63          1.81        1.3852   -3   3   4         2
                67.68          5.52        1.3844    3  -1   2         2
                68.22          1.81        1.3746   -4   2   4         2
                68.98          4.11        1.3614   -3  -1   5         2
                69.02          1.40        1.3607    3   1   2         2
                69.88          1.68        1.3460    2  -2   3         2
                70.22          1.43        1.3404    1  -1   4         2
                70.58          2.06        1.3345    2  -4   2         2
                71.26          1.09        1.3234   -5   1   2         2
                71.85          2.89        1.3140    1  -5   2         2
                72.40          2.10        1.3053   -2   2   5         2
                72.43          2.85        1.3048    2   2   3         2
                72.83          3.22        1.2987   -1  -5   3         2
                73.09          4.73        1.2946   -4   0   5         2
                73.78          4.85        1.2843   -3   5   1         2
                73.82          1.38        1.2836    0   6   0         2
                73.86         10.84        1.2831   -4   4   2         2
                74.69          5.12        1.2709    2   4   2         2
                74.98          2.22        1.2666   -1   5   3         2
                75.63          3.72        1.2574    4  -2   1         2
                76.01          4.95        1.2520   -5  -1   4         2
                76.24          7.94        1.2488   -3  -5   2         2
                76.36          2.68        1.2472   -4  -4   2         2
                76.71          1.48        1.2423   -3  -5   1         2
                77.87          1.18        1.2268   -4  -4   3         2
                77.91          1.28        1.2262   -4   2   5         2
                78.50          4.25        1.2185   -4  -4   1         2
                78.55          4.43        1.2178    1  -3   4         2
                78.83          3.00        1.2142   -3   5   3         2
                79.35          2.76        1.2076   -1  -3   5         2
                81.29          1.89        1.1836    0   4   4         2
                82.11          4.14        1.1738    1   3   4         2
                82.19          2.91        1.1729    1  -5   3         2
                82.21          2.85        1.1726    3  -1   3         2
                82.33          1.37        1.1712   -5  -3   3         2
                82.81          2.09        1.1656    2   0   4         2
                82.84          2.83        1.1652    0   2   5         2
                82.92          1.29        1.1643   -5   3   1         2
                83.36          1.75        1.1593    2   6   0         2
                84.49          5.92        1.1467   -5   3   4         2
                85.99          1.40        1.1305    2  -2   4         2
                86.92          1.45        1.1207    1   5   3         2
                88.24          1.26        1.1074    1  -1   5         2
                88.86          1.04        1.1013    2   2   4         2
                89.32          2.04        1.0968    2   6   1         2
                89.53          1.32        1.0947   -5   3   0         2
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.