Bastnasite-(La)
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from the powder pattern of R070142
      Oftedal I
      Zeitschrift fur Kristallographie 78 (1931) 462-469
      Zur kristallstruktur von bastnasit (Ce,La--)FCO3
      Locality: Western Cheyenne Canyon, Colorado, USA
      Note: positions of C and at least one O undetermined

      CELL PARAMETERS:   7.1510  7.1510  9.7990   90.000   90.000  120.000
      SPACE GROUP: P-62c     

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            La     0.66667   0.66667   0.00000     0.500     1.500
            Ce     0.66667   0.66667   0.00000     0.500     1.500
            F      0.00000   0.00000   0.00000     1.000     1.000
            F      0.33333   0.66667   0.00000     1.000     1.000
            O      0.33333   0.33333   0.14300     1.000     1.000

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    0.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  5 +/-  5 +/-  8
            MAX. ABS. INTENSITY / VOLUME**2:      112.4893884    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                18.11         84.57        4.8995    0   0   2
                24.90         60.00        3.5755    1   1   0
                30.96        100.00        2.8882    1   1   2
                36.68          9.27        2.4497    0   0   4
                43.86         35.40        2.0643    3   0   0
                44.85         40.24        2.0209    1   1   4
                47.81         33.14        1.9024    3   0   2
                51.09          7.57        1.7878    2   2   0
                54.65         16.60        1.6794    2   2   2
                56.33          4.23        1.6332    0   0   6
                58.47         12.28        1.5786    3   0   4
                62.52          8.28        1.4855    1   1   6
                64.53         10.94        1.4441    2   2   4
                69.56          5.27        1.3514    4   1   0
                72.56         12.03        1.3028    4   1   2
                74.01          9.10        1.2808    3   0   6
                78.01          1.25        1.2249    0   0   8
                79.49          3.65        1.2058    2   2   6
                80.61          1.25        1.1918    3   3   0
                81.31          9.62        1.1833    4   1   4
                83.41          3.15        1.1588    1   1   8
                83.47          1.53        1.1581    3   3   2
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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.