Peprossiite-(Ce)
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from single crystal data of R110144
      Callegari A, Caucia F, Mazzi F, Oberti R, Ottolini L, Ungaretti L
      American Mineralogist 85 (2000) 586-593
      The crystal structure of peprossiite-(Ce), and anhydrous REE and Al mica-like borate
      with square-pyramidal coordination for Al
      Sample: Pep1
      _database_code_amcsd 0002424

      CELL PARAMETERS:   4.6540  4.6540  9.4140   90.000   90.000  120.000
      SPACE GROUP: P-62m     

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Pr     0.00000   0.00000   0.00000     0.818     0.861
            Ca     0.00000   0.00000   0.00000     0.102     0.861
            Al     0.38890   0.00000   0.50000     0.667     0.404
            B      0.33333   0.66667   0.22020     0.967     0.566
            Si     0.33333   0.66667   0.22020     0.033     0.566
            O      0.33333   0.66667   0.37540     1.000     0.626
            O      0.42150   0.00000   0.16120     1.000     0.815
            O      0.00000   0.00000   0.50000     0.667     0.468

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  3 +/-  3 +/-  8
            MAX. ABS. INTENSITY / VOLUME**2:      34.28515032    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                 9.39         34.81        9.4140    0   0   1
                18.85         19.29        4.7070    0   0   2
                22.05          5.01        4.0305    1   0   0
                24.02        100.00        3.7052    1   0   1
                29.17         88.67        3.0615    1   0   2
                36.28         35.49        2.4760    1   0   3
                38.24          2.19        2.3535    0   0   4
                38.69         33.05        2.3270    1   1   0
                39.91          8.83        2.2590    1   1   1
                43.38         10.86        2.0860    1   1   2
                44.58         27.19        2.0324    1   0   4
                44.98         16.55        2.0152    2   0   0
                46.06         19.41        1.9706    2   0   1
                48.34          3.47        1.8828    0   0   5
                48.72         40.89        1.8691    1   1   3
                49.18         16.83        1.8526    2   0   2
                53.73          3.91        1.7059    1   0   5
                55.54          4.62        1.6547    1   1   4
                58.86          4.84        1.5690    0   0   6
                60.48          7.73        1.5307    2   0   4
                60.80          3.65        1.5234    2   1   0
                61.68         11.80        1.5038    2   1   1
                63.56         12.76        1.4637    1   1   5
                63.64          3.97        1.4621    1   0   6
                64.27         14.50        1.4494    2   1   2
                68.16          1.48        1.3758    2   0   5
                68.46          8.83        1.3704    2   1   3
                70.03          9.18        1.3435    3   0   0
                72.68          2.46        1.3009    1   1   6
                73.27          3.68        1.2919    3   0   2
                74.14          9.07        1.2789    2   1   4
                74.36          4.16        1.2757    1   0   7
                77.03          8.25        1.2380    2   0   6
                81.23          2.13        1.1843    2   1   5
                81.86          1.24        1.1767    0   0   8
                82.71          2.58        1.1668    3   0   4
                82.99          1.18        1.1635    2   2   0
                86.07          1.30        1.1296    1   0   8
                87.13          2.99        1.1186    2   0   7
                87.97          1.52        1.1101    3   1   1
                89.65          2.38        1.0936    3   0   5
                89.72          4.50        1.0930    2   1   6
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.