Scheelite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from the powder pattern of R040172
      Hazen R M, Finger L W, Mariathasan J W E
      Journal of Physics and Chemistry of Solids 46 (1985) 253-263
      High-pressure crystal chemistry of scheelite-type tungstates and molybdates
      Note: P = 0.0001 GPa, in air

      CELL PARAMETERS:   5.2434  5.2434 11.3747   90.000   90.000   90.000
      ALTERNATE SETTING FOR SPACE GROUP: I4_1/a    

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Ca     0.00000   0.25000   0.62500     1.000     0.580
            W      0.00000   0.25000   0.12500     1.000     0.440
            O      0.15070   0.00860   0.21060     1.000     0.680

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  4 +/-  4 +/- 10
            MAX. ABS. INTENSITY / VOLUME**2:      249.0652067    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                18.63         60.52        4.7618    1   0   1
                28.74        100.00        3.1059    1   1   2
                29.06         23.43        3.0725    1   0   3
                31.46         13.60        2.8437    0   0   4
                34.20         20.32        2.6217    2   0   0
                39.23         12.99        2.2966    2   1   1
                39.23          3.83        2.2966    1   2   1
                39.96          1.45        2.2564    1   1   4
                43.36          4.50        2.0870    1   0   5
                45.48          2.57        1.9943    2   1   3
                45.48          7.03        1.9943    1   2   3
                47.15         29.69        1.9275    2   0   4
                49.15         12.77        1.8538    2   2   0
                53.01          2.97        1.7275    3   0   1
                54.35         15.75        1.6879    1   1   6
                56.35          3.61        1.6328    2   1   5
                56.35          4.42        1.6328    1   2   5
                57.93         14.46        1.5918    3   1   2
                57.93         11.33        1.5918    1   3   2
                58.11          2.12        1.5873    3   0   3
                59.53         11.04        1.5530    2   2   4
                59.56          1.92        1.5521    1   0   7
                64.61          3.34        1.4425    3   2   1
                64.61          1.49        1.4425    2   3   1
                65.67          1.83        1.4218    0   0   8
                67.59          2.64        1.3860    3   0   5
                69.19          2.74        1.3578    2   3   3
                69.19          1.63        1.3578    3   2   3
                70.51          1.95        1.3356    2   1   7
                70.51          2.06        1.3356    1   2   7
                72.04          3.39        1.3109    4   0   0
                75.18          1.09        1.2638    4   1   1
                75.18          1.69        1.2638    1   4   1
                76.17          6.13        1.2499    2   0   8
                76.29          4.53        1.2481    3   1   6
                76.29          6.94        1.2481    1   3   6
                77.72          1.43        1.2287    1   0   9
                79.34          5.08        1.2077    3   3   2
                79.49          1.63        1.2057    4   1   3
                79.49          1.07        1.2057    1   4   3
                80.72          4.63        1.1905    4   0   4
                80.75          1.55        1.1901    3   0   7
                82.22          2.39        1.1725    2   4   0
                82.22          2.52        1.1725    4   2   0
                86.21          3.82        1.1282    2   2   8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.