Trevorite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from single crystal data of R150038
      Blesa M C, Amador U, Moran E, Menendez N, Tornero J D, Rodriguez-Carvajal J
      Solid State Ionics 63 (1993) 429-436
      Synthesis and characterization of nickel and magnesium ferrites obtained from
      alpha-NaFeO2
      Locality: synthetic
      _database_code_amcsd 0015511

      CELL PARAMETERS:   8.1940  8.1940  8.1940   90.000   90.000   90.000
      SPACE GROUP: Fd-3m     

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Ni     0.62500   0.62500   0.62500     0.595     0.280
            Fe     0.62500   0.62500   0.62500     0.405     0.280
            Fe     0.00000   0.00000   0.00000     0.890     0.260
            Ni     0.12500   0.12500   0.12500     0.120     0.700
            O      0.37980   0.37980   0.37980     1.000     1.900

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  7 +/-  7 +/-  7
            MAX. ABS. INTENSITY / VOLUME**2:      84.19444619    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                18.76          9.68        4.7308    1   1   1
                30.87         26.62        2.8970    2   2   0
                36.36        100.00        2.4706    3   1   1
                38.04         22.73        2.3654    2   2   2
                44.21         34.81        2.0485    4   0   0
                54.89          9.00        1.6726    4   2   2
                58.53          6.53        1.5769    3   3   3
                58.53         25.13        1.5769    5   1   1
                64.31         53.89        1.4485    4   4   0
                67.64          1.34        1.3850    5   3   1
                73.03          3.35        1.2956    6   2   0
                76.19          9.18        1.2496    5   3   3
                77.23         10.93        1.2353    6   2   2
                81.36          4.60        1.1827    4   4   4
                89.51          3.82        1.0950    6   4   2
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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.