Goyazite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from single crystal data of R061054
      Kato T
      Mineralogical Journal 13 (1987) 390-396
      Further refinement of the goyazite structure
      Locality: Palermo mine, North Groton, New Hampshire, USA

      CELL PARAMETERS:   7.0170  7.0170 16.5940   90.000   90.000  120.000
      SPACE GROUP: R-3m      

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Sr     0.00000   0.00000   0.00000     1.000     1.000
            Al     0.50000   0.50000   0.50000     1.000     0.660
            P      0.00000   0.00000   0.30750     1.000     0.520
            O      0.00000   0.00000   0.40030     1.000     0.680
            O      0.21420  -0.21420  -0.05670     1.000     0.660
            O      0.12470  -0.12470   0.13710     1.000     0.720
            H      0.00000   0.00000   0.46300     0.500     1.000
            H      0.19400   0.80600   0.11000     1.000     1.000

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  5 +/-  5 +/- 15
            MAX. ABS. INTENSITY / VOLUME**2:      24.85081810    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                15.53         50.81        5.7063    1   0   1
                16.02          1.24        5.5313    0   0   3
                18.09          1.18        4.9026    0   1   2
                25.39         40.79        3.5085    1   1   0
                26.01          4.43        3.4262    1   0   4
                29.90          7.80        2.9888    0   2   1
                30.16        100.00        2.9628    1   1   3
                31.35          6.31        2.8531    2   0   2
                32.37         10.08        2.7657    0   0   6
                36.66          9.53        2.4513    0   2   4
                39.61          5.11        2.2752    2   1   1
                40.24          8.12        2.2411    2   0   5
                40.76         18.12        2.2136    1   2   2
                40.86         36.91        2.2085    1   0   7
                41.58          5.20        2.1720    1   1   6
                44.74          1.64        2.0256    3   0   0
                45.12          6.02        2.0094    2   1   4
                46.25          1.05        1.9630    0   1   8
                47.82         31.03        1.9021    0   3   3
                47.82          2.89        1.9021    3   0   3
                48.18          1.86        1.8887    1   2   5
                52.14         25.49        1.7543    2   2   0
                53.49          3.00        1.7131    2   0   8
                54.74          1.37        1.6768    1   3   1
                54.91          1.09        1.6722    2   2   3
                55.72          4.14        1.6496    2   1   7
                56.30          1.17        1.6342    3   0   6
                56.30          1.29        1.6342    0   3   6
                56.37          4.46        1.6321    1   1   9
                57.58          1.88        1.6008    1   0  10
                61.73          5.58        1.5027    3   1   5
                62.11          4.09        1.4944    0   4   2
                62.72          9.72        1.4814    2   2   6
                63.92         16.75        1.4564    0   2  10
                65.42          3.66        1.4266    4   0   4
                67.41          2.32        1.3892    3   2   1
                68.28          5.42        1.3736    1   3   7
                68.86          3.79        1.3635    0   3   9
                69.94          1.77        1.3451    2   1  10
                71.09          4.12        1.3261    4   1   0
                73.43          3.90        1.2895    1   4   3
                73.43          6.93        1.2895    4   1   3
                76.21          2.03        1.2492    1   0  13
                79.74          1.05        1.2025    5   0   2
                79.81          8.95        1.2017    3   2   7
                81.38          4.25        1.1825    1   3  10
                82.48          1.44        1.1695    3   3   0
                84.91          1.71        1.1421    3   0  12
                86.94          3.15        1.1205    4   0  10
                87.41          4.58        1.1157    2   1  13
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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.