Silicon
      Hanfland M, Schwarz U, Syassen K, Takemura K
      Physical Review Letters 82 (1999) 1197-1200
      Crystal structure of the high-pressure phase silicon VI
      Locality: synthetic
      Sample: at P = 42.5 GPa
      Note: phase VI
      _database_code_amcsd 0015282

      CELL PARAMETERS:    7.9686   4.7759   4.7546   90.000   90.000   90.000
      SPACE GROUP: Cmca      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    180.947
      Density (g/cm3):      4.123
      MAX. ABS. INTENSITY / VOLUME**2:      14.93001592    
      RIR:      1.179
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                37.67          7.33        2.3879    0   2   0         2
                37.84          7.23        2.3773    0   0   2         2
                42.36         27.96        2.1339    0   2   1         4
                43.38         57.80        2.0860    3   1   1         8
                44.04         49.53        2.0561    1   1   2         8
                44.22        100.00        2.0482    2   2   0         4
                44.37         98.92        2.0415    2   0   2         4
                45.53         60.86        1.9921    4   0   0         2
                48.39         36.86        1.8811    2   2   1         8
                54.46         40.42        1.6848    0   2   2         4
                55.31         24.07        1.6609    3   1   2         8
                59.58         13.35        1.5517    2   2   2         8
                62.63         13.17        1.4832    1   3   1         8
                62.87         13.01        1.4781    1   1   3         8
                63.93         15.12        1.4562    4   2   1         8
                64.70          9.93        1.4407    5   1   1         8
                70.97          1.87        1.3281    6   0   0         2
                73.64         18.87        1.2864    4   2   2         8
                74.36          9.42        1.2757    5   1   2         8
                80.43          1.34        1.1940    0   4   0         2
                80.87          1.32        1.1887    0   0   4         2
                83.24          5.73        1.1607    6   2   0         4
                83.35          5.71        1.1594    6   0   2         4
                83.48          4.21        1.1580    0   4   1         4
                84.76         10.36        1.1437    2   4   0         4
                84.96          8.06        1.1416    1   1   4         8
                85.19         10.23        1.1390    2   0   4         4
                86.27          6.26        1.1276    6   2   1         8
                87.76          7.09        1.1122    1   3   3         8
                87.78          7.45        1.1120    2   4   1         8
                89.40         18.00        1.0960    5   3   1         8
                89.62         17.90        1.0939    5   1   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.