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 = 45.5 GPa
      Note: phase VI
      _database_code_amcsd 0015283

      CELL PARAMETERS:    7.9200   4.7586   4.7361   90.000   90.000   90.000
      SPACE GROUP: Cmca      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    178.495
      Density (g/cm3):      4.180
      MAX. ABS. INTENSITY / VOLUME**2:      16.25540579    
      RIR:      1.266
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                37.81          6.52        2.3793    0   2   0         2
                38.00          5.55        2.3681    0   0   2         2
                42.52         26.31        2.1261    0   2   1         4
                43.62         41.39        2.0751    3   1   1         8
                44.23         43.26        2.0479    1   1   2         8
                44.42         97.18        2.0395    2   2   0         4
                44.58        100.00        2.0324    2   0   2         4
                45.83         61.84        1.9800    4   0   0         2
                48.61         34.60        1.8732    2   2   1         8
                54.69         39.35        1.6784    0   2   2         4
                55.60         20.95        1.6530    3   1   2         8
                59.85         12.14        1.5454    2   2   2         8
                62.89         10.35        1.4777    1   3   1         8
                63.15         10.65        1.4723    1   1   3         8
                64.29         14.15        1.4490    4   2   1         8
                65.12          6.79        1.4325    5   1   1         8
                74.05         21.54        1.2803    4   2   2         8
                74.82          8.19        1.2689    5   1   2         8
                80.79          1.35        1.1897    0   4   0         2
                81.25          1.64        1.1840    0   0   4         2
                83.81          7.47        1.1543    6   2   0         4
                83.85          4.12        1.1538    0   4   1         4
                83.92          7.85        1.1530    6   0   2         4
                85.16          9.64        1.1393    2   4   0         4
                85.37          8.12        1.1371    1   1   4         8
                85.62          8.50        1.1344    2   0   4         4
                86.86          5.86        1.1214    6   2   1         8
                88.18          6.93        1.1079    1   3   3         8
                88.20          7.28        1.1077    2   4   1         8
                89.95         13.77        1.0907    5   3   1         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.