Harrisonite
      Grice J D, Roberts A C
      The Canadian Mineralogist 31 (1993) 781-785
      Harrisonite, a well-ordered silico-phosphate with a layered crystal structure.
      Ca(Fe,Mg)6(SiO4)2(PO4)2
      Locality: Arcedeckne Island, Artic Canada
      _database_code_amcsd 0005340

      CELL PARAMETERS:    6.2480   6.2480  26.8020   90.000   90.000  120.000
      SPACE GROUP: R-3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    906.108
      Density (g/cm3):      3.994
      MAX. ABS. INTENSITY / VOLUME**2:      15.30010190    
      RIR:      1.247
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.71         10.33        5.3039    1   0   1         6
                17.68         30.03        5.0174    0   1   2         6
                19.88         39.42        4.4670    0   0   6         2
                23.36          7.71        3.8081    0   1   5         6
                28.56         65.78        3.1255    1   0   7         6
                28.57          9.31        3.1240    1   1   0         6
                30.01         49.72        2.9780    0   0   9         2
                30.31         15.09        2.9489    1   1   3        12
                33.28         81.71        2.6918    0   2   1         6
                35.05        100.00        2.5601    1   1   6        12
                35.79         84.28        2.5087    0   2   4         6
                37.23         23.78        2.4153    2   0   5         6
                40.61         15.42        2.2217    0   1  11         6
                40.84         40.33        2.2095    0   2   7         6
                42.97          6.40        2.1048    2   0   8         6
                46.42          5.33        1.9561    2   1   4        12
                47.17          1.21        1.9266    1   0  13         6
                47.59         14.44        1.9108    1   2   5        12
                47.77         55.03        1.9041    0   2  10         6
                50.21          1.29        1.8169    1   1  12        12
                50.40         23.13        1.8105    2   0  11         6
                50.57          1.42        1.8048    0   1  14         6
                50.60          9.32        1.8039    2   1   7        12
                51.12          5.39        1.7868    0   0  15         2
                51.70          7.28        1.7680    0   3   3         6
                54.90         11.98        1.6725    0   3   6         6
                54.90         11.02        1.6725    3   0   6         6
                56.08          5.57        1.6398    0   2  13         6
                56.61          6.68        1.6259    2   1  10        12
                57.60         13.84        1.6002    1   0  16         6
                58.96          8.84        1.5665    1   2  11        12
                59.15         71.04        1.5620    2   2   0         6
                59.61         18.17        1.5510    1   1  15        12
                61.93          1.07        1.4984    1   3   1        12
                62.25          1.64        1.4914    3   1   2        12
                63.05          8.28        1.4745    2   2   6        12
                64.14          1.37        1.4519    2   1  13        12
                64.48          2.71        1.4452    3   1   5        12
                65.54          4.56        1.4242    0   2  16         6
                66.97          3.84        1.3972    1   3   7        12
                67.74         20.30        1.3833    2   2   9        12
                68.94         14.96        1.3622    2   0  17         6
                69.59          9.16        1.3510    4   0   1         6
                71.10          6.67        1.3260    4   0   4         6
                72.00          4.78        1.3116    0   4   5         6
                73.01          7.92        1.2959    2   1  16        12
                74.06          2.13        1.2800    2   2  12        12
                74.22          3.56        1.2778    3   1  11        12
                74.32          3.37        1.2763    0   0  21         2
                74.37          2.38        1.2755    4   0   7         6
                74.79          3.21        1.2694    0   3  15         6
                74.79          6.49        1.2694    3   0  15         6
                76.10          6.09        1.2508    0   2  19         6
                79.34          7.76        1.2076    4   0  10         6
                79.88          2.10        1.2009    2   0  20         6
                81.36          3.10        1.1827    0   4  11         6
                81.49          1.07        1.1811    3   1  14        12
                81.51          2.03        1.1808    3   2   7        12
                81.92          3.89        1.1760    2   2  15        12
                84.96          1.98        1.1416    1   4   6        12
                84.96          1.60        1.1416    4   1   6        12
                87.21          6.94        1.1178    1   3  16        12
                87.89          9.01        1.1108    0   2  22         6
                88.37          1.03        1.1061    2   3  11        12
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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.