Akermanite
      Merlini M, Gemmi M, Hanfland M, Crichton W
      American Mineralogist 94 (2009) 704-709
      High-pressure behavior of akermanite and gehlenite and phase stability
      of the normal structures in melelites
      Note: P = 15 GPa
      Locality: synthetic
      _database_code_amcsd 0004934

      CELL PARAMETERS:    7.5700   7.5700   4.7810   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    273.975
      Density (g/cm3):      3.304
      MAX. ABS. INTENSITY / VOLUME**2:      24.51449349    
      RIR:      2.416
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.56         10.07        5.3528    1   1   0         4
                21.99          7.57        4.0423    1   0   1         8
                23.50          2.55        3.7850    2   0   0         4
                24.97         12.75        3.5658    1   1   1         4
                26.33          4.04        3.3854    2   1   0         8
                30.11         18.85        2.9676    2   0   1         8
                32.40        100.00        2.7629    2   1   1         8
                33.48          3.45        2.6764    2   2   0         4
                37.57         17.66        2.3938    3   1   0         8
                37.63          1.39        2.3905    0   0   2         2
                38.55          6.93        2.3354    2   2   1         4
                39.53          5.39        2.2795    1   0   2         8
                40.42          7.87        2.2316    3   0   1         8
                41.37          2.75        2.1827    1   1   2         4
                42.22          1.71        2.1405    3   1   1         8
                46.51         12.42        1.9527    2   1   2         8
                47.29          3.29        1.9223    3   2   1         8
                48.08          6.95        1.8925    4   0   0         4
                49.66          5.09        1.8360    4   1   0         8
                51.20         11.03        1.7843    3   3   0         4
                51.24          4.01        1.7829    2   2   2         4
                53.46          9.37        1.7140    4   1   1         8
                54.19          6.70        1.6927    4   2   0         8
                54.23         22.25        1.6915    3   1   2         8
                54.93          3.16        1.6716    3   3   1         4
                58.51          1.86        1.5775    3   2   2         8
                60.63          1.45        1.5274    1   1   3         4
                63.32          1.03        1.4688    2   0   3         8
                64.64          6.03        1.4419    2   1   3         8
                65.25          1.30        1.4299    3   3   2         4
                65.88          2.02        1.4178    5   1   1         8
                67.84          1.15        1.3814    4   2   2         8
                68.53          4.78        1.3693    2   2   3         4
                69.73         10.23        1.3486    5   2   1         8
                69.80          3.40        1.3474    3   0   3         8
                70.35          3.36        1.3382    4   4   0         4
                73.49          1.39        1.2887    4   4   1         4
                74.13          1.45        1.2791    4   3   2         8
                75.33          3.67        1.2617    6   0   0         4
                79.02          1.65        1.2117    5   2   2         8
                79.60          1.54        1.2044    6   1   1         8
                79.67          4.04        1.2035    4   1   3         8
                80.33          1.57        1.1953    0   0   4         2
                80.87          1.69        1.1886    3   3   3         4
                83.21          1.48        1.1611    6   2   1         8
                84.40          2.69        1.1477    5   4   1         8
                87.40          2.11        1.1158    6   0   2         8
                89.23          1.52        1.0976    4   3   3         8
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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.