Sepiolite
      Post J E, Bish D L, Heaney P J
      American Mineralogist 92 (2007) 91-97
      Synchrotron powder X-ray diffraction study of the structure and dehydration
      behavior of sepiolite
      Sample: T = room temperature, in air
      Locality: Durango, Mexico
      _database_code_amcsd 0004269

      CELL PARAMETERS:   13.4050  27.0160   5.2750   90.000   90.000   90.000
      SPACE GROUP: Pncn      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1910.339
      Density (g/cm3):      2.284
      MAX. ABS. INTENSITY / VOLUME**2:      30.95446004    
      RIR:      4.413
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 6.54          1.52       13.5080    0   2   0         2
                 7.36        100.00       12.0081    1   1   0         4
                11.84          1.84        7.4752    1   3   0         4
                13.21          1.11        6.7025    2   0   0         2
                17.70          1.59        5.0114    1   5   0         4
                19.72          4.21        4.5027    0   6   0         2
                20.14          1.73        4.4084    3   1   0         4
                20.61          8.51        4.3099    1   3   1         8
                22.44          1.10        3.9628    2   2   1         8
                23.63          3.88        3.7654    2   3   1         8
                23.81          4.80        3.7376    2   6   0         4
                25.21          3.12        3.5329    2   4   1         8
                26.60          7.98        3.3512    4   0   0         2
                27.98          9.43        3.1886    3   3   1         8
                29.29          1.44        3.0497    2   6   1         8
                33.33          1.84        2.6884    4   6   0         4
                33.59          1.50        2.6679    5   1   0         4
                34.25          3.58        2.6181    2   8   1         8
                34.66          3.52        2.5879    1   0   2         4
                35.04          7.25        2.5609    1   9   1         8
                36.61          1.14        2.4543    2   0   2         4
                36.77          2.35        2.4442    2   1   2         8
                37.48          2.32        2.3993    3   8   1         8
                39.83          1.53        2.2633    3   1   2         8
                40.02          1.84        2.2530    3   9   1         8
                43.67          1.34        2.0726    4   0   2         4
                43.98          1.85        2.0587    4   9   1         8
                59.69          1.19        1.5491    1   8   3         8
                61.08          1.69        1.5172    0   9   3         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.