Keilite
      Shimizu M, Yoshida H, Mandarino J A
      The Canadian Mineralogist 40 (2002) 1687-1692
      The new mineral species keilite, (Fe,Mg)S, the iron-dominant
      analogue of niningerite
      _database_code_amcsd 0005801

      CELL PARAMETERS:    5.2000   5.2000   5.2000   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    140.608
      Density (g/cm3):      3.634
      MAX. ABS. INTENSITY / VOLUME**2:      69.46599650    
      RIR:      6.224
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                29.76          6.21        3.0022    1   1   1         8
                34.50        100.00        2.6000    2   0   0         6
                49.58         61.53        1.8385    2   2   0        12
                58.90          2.87        1.5679    3   1   1        24
                61.80         18.82        1.5011    2   2   2         8
                72.74          7.92        1.3000    4   0   0         6
                83.06         20.64        1.1628    4   2   0        24
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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.