Tiettaite
      Panikorovskii T L, Pekov I V, Krzhizhanovskaya M G, Yakovenchuk V N,
      Britven S N, Gurzhiy V V, Bocharov V N, Yapaskurt V O, Krivovichev S V
      Crystallography Reports 66 (2021) 76-85
      Tiettaite K4Na12Fe3+Si16O41(OH)4·2H2O: A mineral with a novel type of
      microporous heteropolyhedral framework
      Locality: Khibiny alkaline massif, Kola Peninsula, Russia
      _database_code_amcsd 0020968

      CELL PARAMETERS:   28.8660  10.7070  17.4250   90.000   90.000   90.000
      SPACE GROUP: Cmcm      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   5385.514
      Density (g/cm3):      2.104
      MAX. ABS. INTENSITY / VOLUME**2:      24.14624693    
      RIR:      3.737
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 6.12        100.00       14.4330    2   0   0         2
                 8.81          2.59       10.0387    1   1   0         4
                10.15          1.97        8.7125    0   0   2         2
                10.17          2.18        8.6984    1   1   1         8
                11.86          8.66        7.4589    2   0   2         4
                15.95          1.10        5.5576    4   0   2         4
                16.03          1.64        5.5302    3   1   2         8
                17.33          3.35        5.1174    0   2   1         4
                17.67          1.76        5.0193    2   2   0         4
                19.68          6.93        4.5099    3   1   3         8
                20.42          1.20        4.3492    2   2   2         8
                21.31          1.27        4.1704    2   0   4         4
                23.26          1.08        3.8245    5   1   3         8
                23.68          2.36        3.7576    7   1   1         8
                24.88          3.19        3.5784    6   2   0         4
                25.14          1.79        3.5420    1   3   0         4
                25.41          5.32        3.5052    6   2   1         8
                25.66          5.83        3.4710    1   3   1         8
                26.96          1.51        3.3073    5   1   4         8
                27.10          1.24        3.2900    2   2   4         8
                27.14          3.66        3.2862    3   3   1         8
                27.18          3.26        3.2812    1   3   2         8
                27.81          1.64        3.2080    7   1   3         8
                28.58          1.94        3.1238    3   3   2         8
                29.18          1.69        3.0601    4   2   4         8
                29.86          1.02        2.9921    8   2   0         4
                30.61          1.57        2.9207    0   2   5         4
                31.01          2.11        2.8841    7   1   4         8
                31.25          1.54        2.8626    2   2   5         8
                32.21          2.83        2.7788    8   0   4         4
                32.68          2.25        2.7401   10   0   2         4
                32.98          8.13        2.7159    9   1   3         8
                34.46          2.46        2.6024    2   4   1         8
                35.16          3.00        2.5527    0   2   6         4
                35.97          1.17        2.4966    6   2   5         8
                36.13          1.08        2.4863    6   0   6         4
                36.16          1.78        2.4842    1   3   5         8
                37.21          1.46        2.4161    1   1   7         8
                38.58          2.35        2.3339   11   1   3         8
                39.15          1.61        2.3009    9   3   2         8
                39.70          1.35        2.2702    8   2   5         8
                39.98          1.74        2.2550    6   2   6         8
                42.36          1.05        2.1336    8   4   1         8
                43.91          1.02        2.0619   14   0   0         2
                45.24          1.74        2.0044    1   5   3         8
                49.84          1.64        1.8297    8   4   5         8
                55.66          1.40        1.6513    0   6   4         4
                57.94          1.25        1.5917   12   4   5         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.