Na Nd S2
      Ballestracci R, Bertaut E
      Bulletin de la Societe Francaise de Mineralogie et de Cristallographie 87 (1964) 512-517
      Etude crystallographique de sulfures de terres rares et de sodium
      _cod_database_code 1008971
      _database_code_amcsd 0016834

      CELL PARAMETERS:    5.8030   5.8030   5.8030   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    195.415
      Density (g/cm3):      3.931
      MAX. ABS. INTENSITY / VOLUME**2:      102.0569743    
      RIR:      8.453
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                26.61         33.97        3.3504    1   1   1         8
                30.82        100.00        2.9015    2   0   0         6
                44.14         65.71        2.0517    2   2   0        12
                52.29         14.49        1.7497    3   1   1        24
                54.80         20.69        1.6752    2   2   2         8
                64.20          8.72        1.4507    4   0   0         6
                70.77          4.58        1.3313    3   3   1        24
                72.90         22.06        1.2976    4   2   0        24
                81.21         15.31        1.1845    4   2   2        24
                87.31          2.10        1.1168    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.