(NH4)2SiF6
      Gossner B, Kraus O
      Zeitschrift fur Kristallographie 88 (1934) 223-225
      Das kristallgitter von ammoniumhexafluorosilikat (NH4)2SiF6
      _database_code_amcsd 0010534

      CELL PARAMETERS:    5.7600   5.7600   4.7700   90.000   90.000  120.000
      SPACE GROUP: P-3m1     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    137.055
      Density (g/cm3):      2.060
      MAX. ABS. INTENSITY / VOLUME**2:      16.42322501    
      RIR:      2.595
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                17.78        100.00        4.9883    1   0   0         6
                18.60         34.91        4.7700    0   0   1         2
                25.84         78.58        3.4475    0   1   1         6
                31.05          5.42        2.8800    1   1   0         6
                36.01          4.24        2.4942    2   0   0         6
                36.44          3.15        2.4655    1   1   1        12
                37.72          9.44        2.3850    0   0   2         2
                40.83         14.02        2.2102    0   2   1         6
                40.83          5.24        2.2102    2   0   1         6
                49.63          1.67        1.8369    1   1   2        12
                52.17         18.32        1.7534    1   2   1        12
                52.17          4.92        1.7534    2   1   1        12
                53.13         16.57        1.7237    0   2   2         6
                58.81          1.77        1.5701    3   0   1         6
                58.81          5.05        1.5701    0   3   1         6
                62.83          9.31        1.4791    1   2   2        12
                62.83          1.40        1.4791    2   1   2        12
                64.74          6.73        1.4400    2   2   0         6
                67.26          2.19        1.3920    1   1   3        12
                68.00          2.14        1.3786    2   2   1        12
                68.83          2.73        1.3640    0   3   2         6
                70.20          2.96        1.3407    2   0   3         6
                70.93          1.39        1.3287    3   1   1        12
                78.73          4.65        1.2155    2   1   3        12
                84.27          2.06        1.1492    3   0   3         6
                84.70          1.26        1.1444    3   2   0        12
                88.47          1.42        1.1051    4   0   2         6
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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.