K6Ta6Si4O26
      Choisnet J, Nguyen N, Groult D, Raveau B
      Materials Research Bulletin 11 (1976) 887-894
      De nouveaux oxydes a reseau forme d'octahedres NbO6 (TaO6) et de groupes Si2O7:
      Les phases A3Ta6Si4O26 (A = Ba,Sr) et K6M6Si4O26 (M = Nb,Ta)
      _database_code_amcsd 0014245

      CELL PARAMETERS:    9.0660   9.0660   7.8730   90.000   90.000  120.000
      SPACE GROUP: P-62m     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    560.405
      Density (g/cm3):      5.477
      MAX. ABS. INTENSITY / VOLUME**2:      115.1360363    
      RIR:      6.845
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                11.27         45.88        7.8514    1   0   0         6
                19.58         61.53        4.5330    1   1   0         3
                22.59         43.24        3.9365    0   0   2         2
                22.65         13.97        3.9257    2   0   0         6
                25.31         25.63        3.5190    1   0   2        12
                30.07         64.83        2.9722    1   1   2         6
                30.11        100.00        2.9675    2   1   0         6
                32.20         23.41        2.7797    2   0   2        12
                34.26          6.62        2.6171    3   0   0         6
                37.97         44.58        2.3696    2   1   2        12
                39.77          7.47        2.2665    2   2   0         3
                41.47          2.34        2.1776    3   1   0         6
                46.12         14.68        1.9683    0   0   4         2
                46.22          5.79        1.9642    2   2   2         6
                46.25         19.10        1.9628    4   0   0         6
                47.63          3.97        1.9092    1   0   4        12
                47.73          7.88        1.9055    3   1   2        12
                50.56         10.49        1.8054    1   1   4         6
                50.68         15.58        1.8012    3   2   0         6
                51.97          2.28        1.7595    2   0   4        12
                52.06         22.98        1.7566    4   0   2        12
                53.48          8.85        1.7133    4   1   0         6
                56.07         32.30        1.6403    2   1   4        12
                56.16         20.23        1.6379    3   2   2        12
                58.69          2.00        1.5730    3   0   4        12
                58.78         11.62        1.5710    4   1   2        12
                58.81          4.49        1.5703    5   0   0         6
                61.35          7.07        1.5110    3   3   0         3
                62.50          2.87        1.4861    2   2   4         6
                62.61          3.09        1.4838    4   2   0         6
                63.74          1.08        1.4602    3   1   4        12
                63.82          1.76        1.4585    5   0   2        12
                66.25          6.20        1.4106    3   3   2         6
                66.28          4.62        1.4102    5   1   0         6
                67.38         11.35        1.3898    4   0   4        12
                67.46          3.29        1.3884    4   2   2        12
                70.92          9.42        1.3288    3   2   4        12
                71.00          4.96        1.3275    5   1   2        12
                73.12          1.63        1.2942    1   0   6        12
                73.25          5.02        1.2923    4   1   4        12
                75.42          3.81        1.2604    1   1   6         6
                75.64          3.64        1.2572    5   2   0         6
                76.55          1.19        1.2445    2   0   6        12
                77.81          3.85        1.2275    5   0   4        12
                79.94          5.43        1.2001    2   1   6        12
                80.06          6.20        1.1985    3   3   4         6
                80.14          6.35        1.1976    5   2   2        12
                80.16          5.21        1.1973    6   1   0         6
                81.18          2.33        1.1848    4   2   4        12
                84.52          3.91        1.1463    5   1   4        12
                84.60          8.66        1.1455    6   1   2        12
                86.62          1.49        1.1239    3   1   6        12
                89.93          4.45        1.0909    4   0   6        12
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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.