Luzonite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from single crystal data of R060390
      Marumo F, Nowacki W
      Zeitschrift fur Kristallographie 124 (1967) 1-8
      A refinement of the crystal structure of luzonite, Cu3AsS4
      Locality: Cerro de Pasco, Peru

      CELL PARAMETERS:   5.3390  5.3390 10.6000   90.000   90.000   90.000
      SPACE GROUP: I-42m     

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Cu     0.00000   0.50000   0.25000     1.000     1.580
            Cu     0.00000   0.00000   0.50000     1.000     1.580
            As     0.00000   0.00000   0.00000     0.685     0.550
            Sb     0.00000   0.00000   0.00000     0.315     0.550
            S      0.24420   0.24420   0.12480     1.000     1.000

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  4 +/-  4 +/-  9
            MAX. ABS. INTENSITY / VOLUME**2:      132.3807198    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                18.61          2.06        4.7683    1   0   1
                29.04        100.00        3.0749    1   1   2
                33.57          8.44        2.6695    2   0   0
                33.83          4.12        2.6500    0   0   4
                48.21         17.95        1.8876    2   2   0
                48.40         35.48        1.8807    2   0   4
                57.27         22.68        1.6087    3   1   2
                57.60         11.12        1.6001    1   1   6
                60.19          2.61        1.5375    2   2   4
                70.56          4.55        1.3348    4   0   0
                71.16          2.22        1.3250    0   0   8
                78.05          3.66        1.2244    3   3   2
                78.34          7.24        1.2206    3   1   6
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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.