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_q3, treated at 600 C for 50 min
      Locality: Kimito, Finland
      _database_code_amcsd 0018715

      CELL PARAMETERS:    4.7509   4.7509   9.2811   90.000   90.000   90.000
      SPACE GROUP: P4_2/mnm  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    209.484
      Density (g/cm3):      7.960
      MAX. ABS. INTENSITY / VOLUME**2:      279.1975676    
      RIR:     11.421
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                26.53        100.00        3.3594    1   1   0         4
                34.60         79.11        2.5925    1   0   3         8
                37.87         23.13        2.3754    2   0   0         4
                39.60          2.88        2.2757    1   1   3         8
                52.23         57.37        1.7514    2   1   3        16
                54.64         14.31        1.6797    2   2   0         4
                59.79          5.81        1.5469    0   0   6         2
                61.75         13.07        1.5024    3   1   0         8
                66.31         14.88        1.4097    3   0   3         8
                66.55         11.44        1.4051    1   1   6         8
                72.99          5.80        1.2962    2   0   6         8
                78.98          9.53        1.2123    3   2   3        16
                80.94          3.12        1.1877    4   0   0         4
                85.30          5.89        1.1379    2   2   6         8
                87.01          2.78        1.1198    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.