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_q0, untreated
      Locality: Kimito, Finland
      _database_code_amcsd 0018712

      CELL PARAMETERS:    4.7561   4.7561   9.2880   90.000   90.000   90.000
      SPACE GROUP: P4_2/mnm  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    210.099
      Density (g/cm3):      7.939
      MAX. ABS. INTENSITY / VOLUME**2:      279.3365635    
      RIR:     11.457
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                26.50        100.00        3.3631    1   1   0         4
                34.57         78.47        2.5947    1   0   3         8
                37.83         23.23        2.3781    2   0   0         4
                39.57          2.84        2.2778    1   1   3         8
                52.17         57.33        1.7531    2   1   3        16
                54.58         14.19        1.6815    2   2   0         4
                59.74          5.79        1.5480    0   0   6         2
                61.67         12.98        1.5040    3   1   0         8
                66.23         14.93        1.4111    3   0   3         8
                66.49         11.44        1.4062    1   1   6         8
                72.92          5.81        1.2973    2   0   6         8
                78.88          9.50        1.2135    3   2   3        16
                80.84          3.08        1.1890    4   0   0         4
                85.20          5.85        1.1389    2   2   6         8
                86.90          2.80        1.1210    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.