Schapbachite
      Geller S, Wernick J H
      Acta Crystallographica 12 (1959) 46-54
      Ternary semiconducting compounds with sodium chloride-like structure: AgSbSe2,
      AgSbTe2, AgBiS2, AgBiSe2
      Locality: synthetic
      _database_code_amcsd 0009219

      CELL PARAMETERS:    5.6480   5.6480   5.6480   90.000   90.000   90.000
      SPACE GROUP: Fm-3m     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    180.171
      Density (g/cm3):      7.022
      MAX. ABS. INTENSITY / VOLUME**2:      299.8235022    
      RIR:     13.904
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                27.35         82.24        3.2609    1   1   1         8
                31.68        100.00        2.8240    2   0   0         6
                45.42         67.03        1.9969    2   2   0        12
                53.83         34.22        1.7029    3   1   1        24
                56.44         21.48        1.6304    2   2   2         8
                66.18          9.20        1.4120    4   0   0         6
                73.02         11.71        1.2957    3   3   1        24
                75.24         23.62        1.2629    4   2   0        24
                83.93         16.74        1.1529    4   2   2        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.