Fluorcalciopyrochlore
      Zaitsev A N, Spratt J, Shtukenberg A G, Zolotarev A A, Britvin S N,
      Petrov S V, Kuptsova A V, Antonov A V
      Mineralogical Magazine 85 (2021) 532-553
      Oscillatory- and sector-zoned pyrochlore from carbonatites of the Kerimasi
      volcano, Gregory rift, Tanzania
      Sample: KS 23
      Locality: Kisete crater, Kerimasi volcano, Gregory rift, Tanzania
      _database_code_amcsd 0021052

      CELL PARAMETERS:   10.3975  10.3975  10.3975   90.000   90.000   90.000
      SPACE GROUP: Fd-3m     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1124.053
      Density (g/cm3):      4.214
      MAX. ABS. INTENSITY / VOLUME**2:      85.17354034    
      RIR:      6.581
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.76         32.30        6.0030    1   1   1         8
                28.47         24.45        3.1350    3   1   1        24
                29.77        100.00        3.0015    2   2   2         8
                34.50         20.02        2.5994    4   0   0         6
                45.32          1.03        2.0010    5   1   1        24
                45.32          6.28        2.0010    3   3   3         8
                49.60         47.09        1.8380    4   4   0        12
                52.04          3.93        1.7575    5   3   1        48
                58.18          3.48        1.5856    5   3   3        24
                58.92         34.22        1.5675    6   2   2        24
                61.82          7.43        1.5007    4   4   4         8
                63.94          2.88        1.4559    5   5   1        24
                69.43          4.43        1.3536    7   3   1        48
                72.76          5.47        1.2997    8   0   0         6
                79.90          1.12        1.2006    7   5   1        48
                80.54         11.57        1.1927    6   6   2        24
                83.08          8.96        1.1625    8   4   0        24
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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.