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_q6, treated at 650 C for 15 min
      Locality: Kimito, Finland
      _database_code_amcsd 0018718

      CELL PARAMETERS:    4.7507   4.7507   9.2794   90.000   90.000   90.000
      SPACE GROUP: P4_2/mnm  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    209.428
      Density (g/cm3):      7.964
      MAX. ABS. INTENSITY / VOLUME**2:      279.5825399    
      RIR:     11.431
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                21.01          1.18        4.2287    1   0   1         8
                26.53        100.00        3.3593    1   1   0         4
                34.60         79.00        2.5921    1   0   3         8
                37.88         23.14        2.3753    2   0   0         4
                39.61          2.88        2.2754    1   1   3         8
                52.23         57.35        1.7513    2   1   3        16
                54.64         14.29        1.6796    2   2   0         4
                59.80          5.80        1.5466    0   0   6         2
                61.75         13.05        1.5023    3   1   0         8
                66.31         14.88        1.4096    3   0   3         8
                66.56         11.43        1.4048    1   1   6         8
                73.00          5.80        1.2961    2   0   6         8
                78.98          9.53        1.2122    3   2   3        16
                80.95          3.11        1.1877    4   0   0         4
                85.31          5.89        1.1377    2   2   6         8
                87.02          2.78        1.1198    3   3   0         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.