Tschernichite
      Alberti A, Cruciani G, Galli E, Merlino S, Millini R, Quartieri S, Vezzalini G, Zanardi S
      Journal of Physical Chemistry B106 (2002) 10277-10284
      Crystal structure of tetragonal and monoclinic polytypes of tschernichite,
      the natural counterpart of synthetic zeolite beta
      Locality: Mt. Adamson, Northern Victoria Land, Antarctica
      Sample: small crystal, tetragonal
      Note: Mg position adjusted to match reported bond lengths

      CELL PARAMETERS:  12.6340 12.6340 26.6080   90.000   90.000   90.000
      SPACE GROUP: P4_122    
      X-RAY WAVELENGTH:     1.541838
      MAX. ABS. INTENSITY / VOLUME**2:      19.75731979    
               2-THETA      INTENSITY    D-SPACING   H   K   L
                 7.00         21.20       12.6340    1   0   0
                 7.75        100.00       11.4128    1   0   1
                 9.65         11.79        9.1613    1   0   2
                11.93          2.65        7.4166    1   1   2
                14.41          3.76        6.1462    2   0   1
                16.04          1.16        5.5269    2   1   1
                17.05          1.16        5.2005    2   1   2
                18.09          5.00        4.9043    1   0   5
                19.38          1.52        4.5806    2   0   4
                19.42          1.15        4.5719    1   1   5
                20.63          1.00        4.3063    2   1   4
                20.98          2.70        4.2345    2   2   2
                21.10          2.91        4.2113    3   0   0
                21.23          1.84        4.1844    1   0   6
                21.84         10.57        4.0699    2   0   5
                22.14         29.59        4.0150    3   0   2
                22.25          1.14        3.9952    3   1   0
                22.38          1.78        3.9722    1   1   6
                22.50          6.72        3.9509    3   1   1
                24.44          2.52        3.6427    3   1   3
                24.45          2.98        3.6400    1   0   7
                25.03          4.89        3.5582    3   0   4
                25.53          1.88        3.4885    2   1   6
                25.64          3.70        3.4740    3   2   1
                26.80          2.57        3.3260    0   0   8
                27.38          3.56        3.2570    2   0   7
                28.46          4.42        3.1365    4   0   1
                29.24          7.59        3.0538    3   0   6
                30.01          1.85        2.9779    3   3   0
                30.37          2.15        2.9430    2   0   8
                30.55          1.82        2.9266    3   2   5
                31.07          1.75        2.8787    1   0   9
                32.16          1.04        2.7831    4   1   4
                32.51          1.16        2.7539    3   1   7
                32.96          3.72        2.7179    3   3   4
                33.47          1.42        2.6777    2   0   9
                34.36          1.06        2.6101    3   0   8
                42.95          4.08        2.1057    6   0   0
                45.57          1.05        1.9907    3   2  11
                47.32          1.29        1.9208    5   0   9
                55.24          1.21        1.6630    0   0  16
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.