Calcirtite
      Pyatenko Y A, Pudovkina Z V
      Soviet Physics Crystallography 6 (1961) 155-157
      The crystal structure of calcirtite; a new derivative structure of CaF2-CeO2 type
      Note: ideal structure
      Locality: Gornoe Ozero alkaline-ultrabasic Massif, Yakutia, Russia
      _database_code_amcsd 0019375

      CELL PARAMETERS:   15.3000  15.3000  10.2000   90.000   90.000   90.000
      SPACE GROUP: I4_1/acd  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   2387.718
      Density (g/cm3):      4.940
      MAX. ABS. INTENSITY / VOLUME**2:      116.1935979    
      RIR:      7.659
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.59          3.31        5.6823    2   1   1        16
                16.39          2.31        5.4094    2   2   0         4
                19.24          5.33        4.6131    1   1   2         8
                26.05          3.76        3.4212    4   2   0         8
                30.36        100.00        2.9445    3   3   2         8
                34.69          2.43        2.5862    5   1   2        16
                35.19         11.17        2.5500    6   0   0         4
                35.19          5.59        2.5500    0   0   4         2
                39.05          1.24        2.3066    2   2   4         8
                45.54          1.13        1.9919    7   1   2        16
                50.62         19.39        1.8031    6   6   0         4
                50.62         38.78        1.8031    6   0   4         8
                60.18         22.72        1.5377    9   3   2        16
                60.18         11.36        1.5377    3   3   6         8
                63.15          4.27        1.4722    6   6   4         8
                74.41          4.60        1.2750   12   0   0         4
                74.41          2.30        1.2750    0   0   8         2
                82.43          3.90        1.1700    9   9   2         8
                82.43          7.79        1.1700    9   3   6        16
                85.07          1.81        1.1404   12   6   0         8
                85.07          1.81        1.1404   12   0   4         8
                85.07          1.81        1.1404    6   0   8         8
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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.