Sepiolite
      Giustetto R, Levy D, Wahyudi O, Ricchiardi G, Vitillo J G
      European Journal of Mineralogy 23 (2011) 449-466
      Crystal structure refinement of a sepiolite/indigo Maya Blue pigment
      using molecular modelling and synchrotron diffraction
      Locality: Germany
      _database_code_amcsd 0018363

      CELL PARAMETERS:   13.3950  27.0160   5.2765   90.000   90.000   90.000
      SPACE GROUP: Pncn      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1909.456
      Density (g/cm3):      2.279
      MAX. ABS. INTENSITY / VOLUME**2:      30.72192161    
      RIR:      4.390
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 6.54          1.01       13.5080    0   2   0         2
                 7.37        100.00       12.0009    1   1   0         4
                11.84          2.89        7.4734    1   3   0         4
                13.22          1.78        6.6975    2   0   0         2
                17.70          1.89        5.0109    1   5   0         4
                19.72          5.39        4.5027    0   6   0         2
                20.16          1.87        4.4052    3   1   0         4
                20.61          8.67        4.3104    1   3   1         8
                22.44          1.04        3.9624    2   2   1         8
                23.63          3.85        3.7651    2   3   1         8
                23.81          4.44        3.7367    2   6   0         4
                25.21          1.97        3.5326    2   4   1         8
                25.89          1.00        3.4419    3   5   0         4
                26.62         10.09        3.3488    4   0   0         2
                26.87          1.37        3.3183    1   6   1         8
                27.99          9.72        3.1877    3   3   1         8
                29.29          1.21        3.0495    2   6   1         8
                31.68          1.26        2.8245    2   7   1         8
                32.96          1.12        2.7176    3   6   1         8
                33.34          2.73        2.6871    4   6   0         4
                33.62          1.22        2.6659    5   1   0         4
                34.25          3.80        2.6180    2   8   1         8
                34.65          3.64        2.5885    1   0   2         4
                35.04          9.12        2.5610    1   9   1         8
                36.61          1.18        2.4547    2   0   2         4
                36.76          2.89        2.4446    2   1   2         8
                36.98          1.40        2.4312    2   9   1         8
                37.49          2.15        2.3989    3   8   1         8
                39.83          1.29        2.2634    3   1   2         8
                39.83          1.48        2.2633    2  10   1         8
                40.02          1.25        2.2527    3   9   1         8
                43.68          2.06        2.0724    4   0   2         4
                44.00          2.15        2.0582    4   9   1         8
                59.67          1.32        1.5495    1   8   3         8
                61.06          2.27        1.5175    0   9   3         4
                61.81          1.02        1.5009    0  18   0         2
                71.92          1.01        1.3128    1   0   4         4
                72.85          1.50        1.2984    1  18   2         8
                73.21          1.17        1.2928    9   9   1         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.