Ferroselite
      Lavina B, Downs R T, Sinogeikin S
      Crystals 8 (2018) 289; doi:10.3390/cryst807
      The structure of ferroselite, FeSe2, at pressures up to 46 GPa
      and temperatures down to 50 K: A single-crystal micro-diffraction analysis
      Note: P = 1.7 GPa
      Locality: Paradox Valley, Uravan District, Montrose County, Colorado, USA
      _database_code_amcsd 0020710

      CELL PARAMETERS:    4.7710   5.7560   3.5663   90.000   90.000   90.000
      SPACE GROUP: Pnnm      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     97.937
      Density (g/cm3):      7.248
      MAX. ABS. INTENSITY / VOLUME**2:      92.00201258    
      RIR:      4.133
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                24.23         12.70        3.6732    1   1   0         4
                29.46         14.89        3.0316    0   1   1         4
                31.07          6.05        2.8780    0   2   0         2
                31.31         49.33        2.8565    1   0   1         4
                35.07        100.00        2.5587    1   1   1         8
                36.46         82.46        2.4643    1   2   0         4
                37.71         10.80        2.3855    2   0   0         2
                40.95          6.76        2.2037    2   1   0         4
                44.70         11.69        2.0274    1   2   1         8
                48.56         69.45        1.8747    2   1   1         8
                49.64          6.45        1.8366    2   2   0         4
                51.23         28.80        1.7831    0   0   2         2
                51.33          9.14        1.7801    1   3   0         4
                54.29         33.70        1.6897    0   3   1         4
                56.35          9.14        1.6328    2   2   1         8
                57.45          1.73        1.6041    1   1   2         8
                57.90         15.18        1.5927    1   3   1         8
                60.39         11.40        1.5329    3   1   0         4
                61.14          1.34        1.5158    0   2   2         4
                62.08          1.29        1.4951    2   3   0         4
                64.11          1.26        1.4525    3   0   1         4
                64.50         27.47        1.4446    1   2   2         8
                64.79          2.91        1.4390    0   4   0         2
                65.34          4.11        1.4282    2   0   2         4
                66.38          8.38        1.4083    3   1   1         8
                67.26          7.41        1.3920    3   2   0         4
                67.58          2.73        1.3862    2   1   2         8
                67.99          3.04        1.3788    2   3   1         8
                72.96          3.05        1.2967    3   2   1         8
                74.11          3.18        1.2794    2   2   2         8
                75.46          4.84        1.2598    1   3   2         8
                77.46         12.20        1.2322    2   4   0         4
                80.53          3.18        1.1927    4   0   0         2
                82.61          2.35        1.1679    4   1   0         4
                83.09          8.00        1.1624    3   1   2         8
                83.47          2.97        1.1581    3   3   1         8
                83.88          2.09        1.1535    1   0   3         4
                85.94          6.22        1.1310    1   1   3         8
                87.01          2.53        1.1198    0   4   2         4
                87.08          1.27        1.1191    1   5   0         4
                89.27          6.48        1.0972    3   2   2         8
                89.45          4.40        1.0955    0   5   1         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.