Tapiolite-(Fe)
      Zema M, Tarantino S C, Giorgiani A
      Mineralogical Magazine 70 (2006) 319-328
      Structural changes induced by cation ordering in ferrotapiolite
      Note: Crystal Kim20_q2, treated at 600 C for 20 min
      Locality: Kimito, Finland
      _database_code_amcsd 0018714

      CELL PARAMETERS:    4.7516   4.7516   9.2856   90.000   90.000   90.000
      SPACE GROUP: P4_2/mnm  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    209.647
      Density (g/cm3):      7.960
      MAX. ABS. INTENSITY / VOLUME**2:      279.2103878    
      RIR:     11.422
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                21.00          1.03        4.2299    1   0   1         8
                26.53        100.00        3.3599    1   1   0         4
                34.59         79.29        2.5935    1   0   3         8
                37.87         23.13        2.3758    2   0   0         4
                39.59          2.89        2.2765    1   1   3         8
                52.22         57.41        1.7519    2   1   3        16
                54.63         14.33        1.6799    2   2   0         4
                59.75          5.82        1.5476    0   0   6         2
                61.74         13.09        1.5026    3   1   0         8
                66.29         14.87        1.4100    3   0   3         8
                66.52         11.46        1.4057    1   1   6         8
                72.95          5.81        1.2967    2   0   6         8
                78.96          9.55        1.2125    3   2   3        16
                80.93          3.13        1.1879    4   0   0         4
                85.27          5.91        1.1382    2   2   6         8
                87.00          2.78        1.1200    3   3   0         4
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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.