Na1.8Ca1.1Si6O14
      Gasparik T, Parise J B, Eiben B A, Hriljac J A
      American Mineralogist 80 (1995) 1269-1276
      Stability and structure of a new high-pressure silicate, Na1.8Ca1.1Si6O14
      Sample: data collected on an image plate
      Note: U(2,3) for Si2, Na/Ca altered to match symmetry constraints.
      _database_code_amcsd 0001762

      CELL PARAMETERS:    7.9030   7.9030   4.5950   90.000   90.000  120.000
      SPACE GROUP: P321      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    248.542
      Density (g/cm3):      3.196
      MAX. ABS. INTENSITY / VOLUME**2:      12.86949868    
      RIR:      1.311
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.93         17.06        6.8442    1   0   0         6
                19.32         10.61        4.5950    0   0   1         2
                22.50         30.45        3.9515    1   1   0         3
                23.32          6.11        3.8150    1   0   1         6
                29.82        100.00        2.9960    1   1   1         6
                32.63         45.20        2.7446    0   2   1         6
                32.63         38.77        2.7446    2   0   1         6
                34.68         26.40        2.5869    2   1   0         6
                39.21          5.71        2.2975    0   0   2         2
                39.50         12.09        2.2814    3   0   0         6
                40.00         37.54        2.2542    1   2   1         6
                40.00          7.03        2.2542    2   1   1         6
                41.46          1.77        2.1781    0   1   2         6
                41.46         12.44        2.1781    1   0   2         6
                44.33          9.35        2.0434    0   3   1         6
                44.33         10.06        2.0434    3   0   1         6
                45.93          7.43        1.9757    2   2   0         3
                47.68          2.10        1.9075    0   2   2         6
                47.68          1.41        1.9075    2   0   2         6
                47.92         19.36        1.8982    3   1   0         6
                50.27          2.14        1.8151    2   2   1         6
                52.13          4.92        1.7544    3   1   1         6
                53.33         19.78        1.7178    1   2   2         6
                53.33          3.76        1.7178    2   1   2         6
                56.88         14.30        1.6189    3   0   2         6
                56.88         10.23        1.6189    0   3   2         6
                57.47          2.99        1.6035    4   0   1         6
                58.81          1.74        1.5702    3   2   0         6
                61.94          3.08        1.4980    2   2   2         6
                62.15         12.56        1.4935    4   1   0         6
                62.51         14.00        1.4858    2   3   1         6
                62.51          8.10        1.4858    3   2   1         6
                63.58          3.43        1.4634    1   3   2         6
                65.34          5.00        1.4281    1   1   3         6
                65.74          2.56        1.4204    1   4   1         6
                65.74          3.56        1.4204    4   1   1         6
                66.93          2.89        1.3980    0   2   3         6
                66.93          6.80        1.3980    2   0   3         6
                68.36          6.30        1.3723    0   4   2         6
                71.60          3.67        1.3180    1   2   3         6
                71.60          8.94        1.3180    2   1   3         6
                71.65          5.84        1.3172    3   3   0         3
                71.98          2.39        1.3119    0   5   1         6
                71.98          1.99        1.3119    5   0   1         6
                72.98          2.18        1.2963    3   2   2         6
                74.64          1.96        1.2717    0   3   3         6
                76.00          2.28        1.2522    1   4   2         6
                76.00          2.72        1.2522    4   1   2         6
                76.51          3.12        1.2450    4   2   1         6
                77.68          4.51        1.2293    5   1   0         6
                79.11          1.56        1.2105    2   2   3         6
                80.59          1.76        1.1920    1   3   3         6
                80.59          2.32        1.1920    3   1   3         6
                80.96          3.36        1.1875    1   5   1         6
                80.96          5.49        1.1875    5   1   1         6
                81.93          4.47        1.1759    5   0   2         6
                84.30          2.36        1.1487    0   0   4         2
                84.85          2.36        1.1427    3   3   2         6
                86.31          4.99        1.1271    2   4   2         6
                89.36          3.21        1.0964    2   3   3         6
                89.36          5.38        1.0964    3   2   3         6
                89.41          1.40        1.0959    5   2   0         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.