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-47
      _database_code_amcsd 0001320

      CELL PARAMETERS:    6.7130   7.7080   7.0194   91.310  117.930   91.770
      SPACE GROUP: C-1       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    320.464
      Density (g/cm3):      3.024
      MAX. ABS. INTENSITY / VOLUME**2:      5.605541348    
      RIR:      0.604
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.29          6.90        6.1962    0   0   1         2
                18.46          8.00        4.8056   -1   1   0         2
                18.94         30.79        4.6858   -1   1   1         2
                19.06         71.20        4.6559   -1  -1   1         2
                19.33         20.11        4.5915    1   1   0         2
                23.11          8.94        3.8487    0   2   0         2
                26.57          5.38        3.3547   -2   0   1         2
                26.75         50.79        3.3331    0  -2   1         2
                27.22         46.11        3.2764    1  -1   1         2
                27.77         61.97        3.2121   -1  -1   2         2
                27.80         46.27        3.2091    0   2   1         2
                28.20        100.00        3.1642   -1   1   2         2
                28.34         28.44        3.1493    1   1   1         2
                28.82          3.75        3.0981    0   0   2         2
                30.17         90.17        2.9622    2   0   0         2
                30.42          7.20        2.9381   -2   0   2         2
                34.94         13.22        2.5679   -2   2   1         2
                36.05         24.44        2.4916   -2  -2   1         2
                36.45          8.98        2.4648    0  -2   2         2
                37.43          1.35        2.4028   -2   2   0         2
                37.54         37.25        2.3960   -1   3   0         2
                38.05          7.00        2.3650    0   2   2         2
                38.42          6.01        2.3429   -2   2   2         2
                38.68          1.03        2.3280   -2  -2   2         2
                38.90          3.40        2.3151    1   3   0         2
                39.24          8.01        2.2958    2   2   0         2
                39.40         11.51        2.2872    2   0   1         2
                39.80          6.22        2.2650   -2   0   3         2
                40.99         10.69        2.2016   -1   1   3         2
                42.45         24.10        2.1296    1  -3   1         2
                43.07         10.05        2.1004   -3  -1   2         2
                44.17          4.12        2.0504   -1   3   2         2
                44.72          4.14        2.0264    1   3   1         2
                45.04          1.25        2.0127    2  -2   1         2
                46.30         26.99        1.9610   -2  -2   3         2
                46.75          4.48        1.9433   -2   2   3         2
                46.96          4.11        1.9349   -3   1   0         2
                47.23          6.78        1.9244    0   4   0         2
                47.27          1.74        1.9228    2   2   1         2
                47.84          1.37        1.9013   -3   1   3         2
                48.10         16.41        1.8916    3   1   0         2
                50.24          2.03        1.8162    0   4   1         2
                51.06         13.53        1.7887    0   2   3         2
                51.61          1.63        1.7708    1  -3   2         2
                52.24         19.02        1.7512   -2   0   4         2
                54.09          3.46        1.6956   -1   3   3         2
                54.36          1.18        1.6877   -3   3   2         2
                54.67          4.04        1.6789   -1  -1   4         2
                54.72          3.97        1.6774   -4   0   2         2
                55.11         12.14        1.6666    0  -4   2         2
                55.50          1.33        1.6556   -1   1   4         2
                55.68          1.04        1.6507   -3  -3   2         2
                55.77          7.35        1.6482    3  -1   1         2
                56.14          4.39        1.6382    2  -2   2         2
                56.93          2.11        1.6175   -3  -1   4         2
                57.04         15.46        1.6147   -2   4   2         2
                57.08          2.84        1.6137    3   1   1         2
                57.42          8.92        1.6049   -2  -4   2         2
                57.43          7.02        1.6046    0   4   2         2
                57.54         17.58        1.6019   -3   3   0         2
                58.32         10.26        1.5821   -2   2   4         2
                58.63         16.12        1.5746    2   2   2         2
                59.15          2.02        1.5619   -3   3   3         2
                59.69          1.97        1.5491    0   0   4         2
                60.49          9.13        1.5305    3   3   0         2
                60.92         11.24        1.5208   -4  -2   2         2
                61.32          1.43        1.5117    2  -4   1         2
                61.52          1.04        1.5074   -1   5   0         2
                61.89          1.12        1.4991   -4   2   3         2
                62.73          7.51        1.4811    4   0   0         2
                63.05          3.30        1.4743   -4  -2   1         2
                63.31         10.14        1.4691   -4   0   4         2
                63.82          3.18        1.4585    0  -2   4         2
                64.55          7.91        1.4438   -1  -3   4         2
                64.78          2.79        1.4391    1  -5   1         2
                64.81          4.26        1.4386    0  -4   3         2
                65.77          8.71        1.4198   -1  -5   2         2
                66.57          4.05        1.4046   -4   2   0         2
                66.80          4.83        1.4004   -1   3   4         2
                66.87          7.02        1.3991   -1   5   2         2
                67.21          3.65        1.3929   -3  -3   4         2
                67.61          1.75        1.3857   -3   3   4         2
                67.64          5.69        1.3852    3  -1   2         2
                68.18          1.98        1.3755   -4   2   4         2
                68.88          4.13        1.3632   -3  -1   5         2
                69.06          1.50        1.3600    3   1   2         2
                69.77          1.66        1.3479    2  -2   3         2
                70.12          1.45        1.3420    1  -1   4         2
                70.45          2.07        1.3366    2  -4   2         2
                71.24          1.14        1.3236   -5   1   2         2
                71.74          2.98        1.3157    1  -5   2         2
                72.22          1.05        1.3082   -5  -1   2         2
                72.36          2.17        1.3060   -2   2   5         2
                72.49          2.86        1.3038    2   2   3         2
                72.75          3.19        1.2998   -1  -5   3         2
                73.01          5.21        1.2959   -4   0   5         2
                73.73          4.96        1.2851   -3   5   1         2
                73.80         11.00        1.2840   -4   4   2         2
                73.87          1.41        1.2829    0   6   0         2
                74.83          5.22        1.2688    2   4   2         2
                75.06          2.29        1.2655   -1   5   3         2
                75.57          3.76        1.2582    4  -2   1         2
                75.99          5.01        1.2524   -5  -1   4         2
                76.32          8.03        1.2477   -3  -5   2         2
                76.46          2.67        1.2458   -4  -4   2         2
                76.84          1.43        1.2406   -3  -5   1         2
                77.85          1.24        1.2270   -4   2   5         2
                77.91          1.28        1.2261   -4  -4   3         2
                78.39          4.60        1.2199    1  -3   4         2
                78.64          4.49        1.2166   -4  -4   1         2
                78.82          3.09        1.2143   -3   5   3         2
                79.17          2.99        1.2098   -1  -3   5         2
                80.00          1.01        1.1994    3   3   2         2
                81.38          1.98        1.1825    0   4   4         2
                82.03          2.98        1.1747    1  -5   3         2
                82.15          3.11        1.1733    3  -1   3         2
                82.18          4.05        1.1729    1   3   4         2
                82.39          1.44        1.1704   -5  -3   3         2
                82.76          1.96        1.1662    2   0   4         2
                82.84          2.99        1.1653    0   2   5         2
                82.85          1.40        1.1651   -5   3   1         2
                83.52          1.84        1.1575    2   6   0         2
                84.43          5.99        1.1473   -5   3   4         2
                85.85          1.41        1.1320    2  -2   4         2
                87.08          1.40        1.1191    1   5   3         2
                88.10          1.40        1.1087    1  -1   5         2
                88.91          1.08        1.1008    2   2   4         2
                89.45          1.36        1.0955   -5   3   0         2
                89.51          2.11        1.0949    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.