Briartite
      Wintenberger M
      Materials Research Bulletin 14 (1979) 1195-1202
      Etude de la structure cristallographique et magnetique de Cu2FeGeS4 et remarque
      sur la structure magnetique de Cu2MnSnS4
      _database_code_amcsd 0014274

      CELL PARAMETERS:    5.3250   5.3250  10.5100   90.000   90.000   90.000
      SPACE GROUP: I-42m     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    298.018
      Density (g/cm3):      4.277
      MAX. ABS. INTENSITY / VOLUME**2:      118.0147607    
      RIR:      8.985
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.68          1.49        4.7501    1   0   1         8
                29.18        100.00        3.0607    1   1   2         4
                33.66          7.13        2.6625    2   0   0         4
                34.12          3.40        2.6275    0   0   4         2
                48.34         18.77        1.8827    2   2   0         4
                48.69         36.81        1.8702    2   0   4         8
                57.47         23.41        1.6036    3   1   2         8
                58.08         11.33        1.5882    1   1   6         4
                60.50          2.30        1.5304    2   2   4         4
                70.77          4.90        1.3312    4   0   0         4
                71.86          2.36        1.3138    0   0   8         2
                78.32          3.91        1.2208    3   3   2         4
                78.85          7.69        1.2140    3   1   6         8
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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.