Apuanite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from single crystal data of R060674
      Mellini M, Merlino S
      American Mineralogist 64 (1979) 1235-1242
      Versliaite and apuanite: Derivative structures related to schafarzikite

      CELL PARAMETERS:   8.3540  8.3540 17.9330   90.000   90.000   90.000
      SPACE GROUP: P4_2/mbc  

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Fe     0.30980   0.31790   0.00000     0.880     1.203
            Sb     0.30980   0.31790   0.00000     0.120     1.203
            Fe     0.00000   0.50000   0.25000     1.000     0.773
            Fe     0.00000   0.50000   0.08290     0.900     0.698
            Zn     0.00000   0.50000   0.08290     0.100     0.698
            Sb     0.16770   0.17060   0.16380     0.900     0.534
            As     0.16770   0.17060   0.16380     0.100     0.534
            S      0.50000   0.50000   0.00000     0.840     1.335
            O     -0.09870   0.36240   0.16280     1.000     0.521
            O     -0.10670   0.39150   0.00000     1.000     0.760
            O     -0.18530   0.65740   0.08990     1.000     0.702
            O     -0.17790   0.67790   0.25000     1.000     0.880

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  7 +/-  7 +/- 16
            MAX. ABS. INTENSITY / VOLUME**2:      116.5189424    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                 9.86          2.09        8.9665    0   0   2
                15.00          7.42        5.9072    1   1   0
                19.80          2.15        4.4833    0   0   4
                21.27          8.48        4.1770    2   0   0
                23.50          1.79        3.7863    2   0   2
                24.34          5.18        3.6575    2   1   1
                28.17        100.00        3.1681    2   1   3
                29.22          1.63        3.0561    2   0   4
                29.89         11.56        2.9888    0   0   6
                30.26         20.99        2.9536    2   2   0
                33.60         15.39        2.6669    1   1   6
                33.93         19.15        2.6418    3   1   0
                34.67          1.32        2.5873    2   1   5
                35.42          1.90        2.5341    3   1   2
                36.98         22.80        2.4307    2   0   6
                38.58          3.22        2.3339    2   1   6
                38.87          1.25        2.3170    3   2   0
                39.60          1.99        2.2760    3   1   4
                42.80          2.74        2.1128    2   1   7
                45.03          1.11        2.0133    4   1   1
                46.10          3.44        1.9691    3   3   0
                47.38         30.78        1.9189    4   1   3
                48.06          1.28        1.8932    4   0   4
                48.75          5.77        1.8680    4   2   0
                52.01         16.42        1.7581    2   1   9
                53.53          6.91        1.7120    4   0   6
                55.92         24.46        1.6443    3   3   6
                61.78          6.05        1.5016    5   2   3
                62.11          5.39        1.4944    0   0  12
                62.94          1.48        1.4768    4   4   0
                64.91          8.08        1.4367    5   1   6
                65.11          5.42        1.4327    5   3   0
                65.73          9.97        1.4207    4   1   9
                67.24          6.03        1.3923    6   0   0
                70.64          2.56        1.3334    2   2  12
                72.70          3.71        1.3007    3   1  12
                73.27          1.85        1.2919    5   3   6
                74.43          4.75        1.2747    5   4   3
                75.30          1.46        1.2621    6   0   6
                78.07          2.77        1.2241    5   2   9
                79.30          3.84        1.2082    6   2   6
                80.72          1.32        1.1904    3   3  12
                82.70          1.86        1.1669    4   2  12
                85.23          3.14        1.1387    2   1  15
                86.33          3.32        1.1269    7   2   3
                89.12          1.07        1.0987    7   1   6
                89.12          1.39        1.0987    5   5   6
                89.87          2.65        1.0915    5   4   9
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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.