Krutaite
      Heyding R D, Murray R M
      Canadian Journal of Chemistry 54 (1976) 841-848
      Crystal structures of Cu1.8Se, Cu3Se2, alpha- and gamma-CuSe, CuSe2, and CuSe2II
      Note: high-pressure polymorph, pyrite structure
      _database_code_amcsd 0012162

      CELL PARAMETERS:    6.1160   6.1160   6.1160   90.000   90.000   90.000
      SPACE GROUP: Pa3       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    228.772
      Density (g/cm3):      6.429
      MAX. ABS. INTENSITY / VOLUME**2:      90.36847299    
      RIR:      4.577
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                29.20         63.20        3.0580    2   0   0         6
                32.74        100.00        2.7352    2   1   0        12
                35.97         88.81        2.4968    2   1   1        24
                41.77         23.80        2.1623    2   2   0        12
                44.44          2.40        2.0387    2   2   1        24
                49.42         66.08        1.8440    3   1   1        24
                51.78          6.40        1.7655    2   2   2         8
                54.06         36.13        1.6963    3   0   2        12
                56.28         36.81        1.6346    3   2   1        24
                56.28          8.44        1.6346    3   1   2        24
                60.56          4.99        1.5290    4   0   0         6
                62.63          1.44        1.4833    4   1   0        12
                62.63          1.32        1.4833    3   2   2        24
                64.66          1.51        1.4416    4   1   1        24
                66.66          1.60        1.4031    3   3   1        24
                70.57         13.14        1.3346    4   2   1        24
                72.49          6.11        1.3039    3   3   2        24
                76.27          3.04        1.2484    4   2   2        24
                78.14          1.18        1.2232    4   3   0        12
                79.99          1.28        1.1994    4   1   3        24
                81.84          1.63        1.1770    3   3   3         8
                81.84         17.97        1.1770    5   1   1        24
                85.50          1.05        1.1357    5   0   2        12
                85.50         12.33        1.1357    4   2   3        24
                87.32          6.37        1.1166    5   1   2        24
                87.32          1.16        1.1166    5   2   1        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.