Ferronigerite-6N6S
      Grey I E, Gatehouse B M
      American Mineralogist 64 (1979) 1255-1264
      The crystal structure of nigerite-24R
      Locality: Mt Garnet, northern Queensland, Australia
      _database_code_amcsd 0000754

      CELL PARAMETERS:   18.8260  18.8260  18.8260   17.508   17.508   17.508
      SPACE GROUP: R-3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    527.034
      Density (g/cm3):      4.408
      MAX. ABS. INTENSITY / VOLUME**2:      17.44253238    
      RIR:      1.288
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 9.54          4.12        9.2665    2   2   2         2
                14.34          5.57        6.1777    3   3   3         2
                18.16         23.07        4.8854    1   1   0         6
                18.99         33.82        4.6737    2   1   1         6
                19.16          4.46        4.6333    4   4   4         2
                19.59         43.18        4.5318    2   2   1         6
                21.11         38.35        4.2087    3   2   2         6
                22.01         12.84        4.0387    3   3   2         6
                24.04         12.73        3.7023    4   3   3         6
                31.22        100.00        2.8652    0  -1   1         6
                36.24          1.88        2.4788    1  -1   1         6
                36.35          2.49        2.4715    2   0   0         6
                36.79         55.58        2.4427    2   2   0         6
                37.12          2.30        2.4218    3   1   1         6
                39.78          1.98        2.2659    4   4   2         6
                48.65          2.92        1.8714    2  -1   1        12
                49.00         15.45        1.8588    3   1   0        12
                49.27          5.32        1.8496    3   2   0        12
                49.96          4.02        1.8255    4   2   1        12
                50.39          1.69        1.8109    4   3   1        12
                55.55         16.33        1.6542    1  -2   1         6
                65.11         63.11        1.4326    0  -2   2         6
                68.22          1.16        1.3747    0  -1   3        12
                68.51          1.98        1.3697    3  -1   2        12
                68.72          2.11        1.3660    4   1   0        12
                69.28          2.59        1.3562    4   3   0        12
                77.20          6.44        1.2357    4   0   0         6
                85.79          1.33        1.1326    4  -1   2        12
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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.