Berzelianite
      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
      Locality: synthetic
      _database_code_amcsd 0012163

      CELL PARAMETERS:    5.7650   5.7650   5.7650   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    191.601
      Density (g/cm3):      6.697
      MAX. ABS. INTENSITY / VOLUME**2:      143.3267000    
      RIR:      6.968
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                26.78         58.23        3.3284    1   1   1         8
                31.02          3.46        2.8825    2   0   0         6
                44.45        100.00        2.0382    2   2   0        12
                52.66         27.83        1.7382    3   1   1        24
                64.67          8.72        1.4412    4   0   0         6
                71.31          4.70        1.3226    3   3   1        24
                81.86         15.56        1.1768    4   2   2        24
                88.03          2.07        1.1095    3   3   3         8
                88.03          3.06        1.1095    5   1   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.