Tiptopite
      Peacor D R, Rouse R C, Ahn J-H
      American Mineralogist 72 (1987) 816-820
      Crystal structure of tiptopite, a framework beryllophosphate isotypic with basic
      cancrinite
      Note: U(1,2) for OH5 has been altered to match symmetry constraints.
      _database_code_amcsd 0001111

      CELL PARAMETERS:   11.6550  11.6550   4.6920   90.000   90.000  120.000
      SPACE GROUP: P6_3      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    551.967
      Density (g/cm3):      2.665
      MAX. ABS. INTENSITY / VOLUME**2:      11.78468871    
      RIR:      1.440
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.20          6.98        5.8275    1   1   0         6
                17.57          4.19        5.0468    2   0   0         6
                20.88         10.45        4.2548    1   0   1         6
                23.32         29.72        3.8150    1   2   0         6
                23.32          1.55        3.8150    2   1   0         6
                24.36         24.26        3.6546    1   1   1         6
                25.93         15.12        3.4363    2   0   1         6
                26.49         33.25        3.3645    3   0   0         6
                30.19         25.41        2.9600    1   2   1         6
                30.19         74.59        2.9600    2   1   1         6
                32.75          2.54        2.7342    3   0   1         6
                35.58         32.01        2.5234    4   0   0         6
                37.41          1.31        2.4041    1   3   1         6
                37.41          2.34        2.4041    3   1   1         6
                38.37         23.55        2.3460    0   0   2         1
                38.89          2.78        2.3156    3   2   0         6
                40.59         14.92        2.2224    4   0   1         6
                40.98          1.66        2.2026    1   4   0         6
                40.98          1.89        2.2026    4   1   0         6
                41.49          5.56        2.1763    1   1   2         6
                43.59          7.64        2.0765    2   3   1         6
                43.59          3.05        2.0765    3   2   1         6
                45.38          2.47        1.9984    1   2   2         6
                45.38          2.92        1.9984    2   1   2         6
                45.49          1.32        1.9938    4   1   1         6
                46.77          8.36        1.9425    3   3   0         6
                49.91          1.35        1.8273    2   2   2         6
                50.33          2.70        1.8129    1   5   0         6
                50.88          1.92        1.7948    3   3   1         6
                51.73          1.11        1.7671    2   4   1         6
                51.73          1.44        1.7671    4   2   1         6
                53.32          5.69        1.7182    4   0   2         6
                54.24          3.75        1.6910    5   1   1         6
                55.78          1.65        1.6480    3   2   2         6
                57.38          4.19        1.6058    1   4   2         6
                57.38          3.93        1.6058    4   1   2         6
                60.11          1.56        1.5392    1   6   0         6
                60.50          1.03        1.5302    5   0   2         6
                60.59          3.45        1.5281    2   5   1         6
                62.03          2.16        1.4962    3   3   2         6
                62.13          1.10        1.4939    2   0   3         6
                63.62          4.80        1.4626    1   6   1         6
                63.62          2.44        1.4626    6   1   1         6
                63.90          9.32        1.4569    4   4   0         6
                64.38          1.79        1.4471    1   2   3         6
                64.38          5.50        1.4471    2   1   3         6
                70.16          1.28        1.3413    2   6   1         6
                70.16          1.17        1.3413    6   2   1         6
                70.43          1.13        1.3369    7   1   0         6
                70.89          3.47        1.3294    4   0   3         6
                73.00          3.32        1.2961    2   3   3         6
                73.00          1.10        1.2961    3   2   3         6
                77.06          5.64        1.2376    4   4   2         6
                77.39          1.60        1.2331    2   7   0         6
                81.23          1.06        1.1842    5   1   3         6
                88.61          1.34        1.1037    3   7   1         6
                89.29          1.54        1.0971    1   6   3         6
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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.