Diamond
      Fayos J
      Journal of Solid State Chemistry 148 (1999) 278-285
      Possible 3D carbon structures as progressive intermediates in graphite
      to diamond phase transition
      Note: mathematical model, phase: diam_cr44_ch*; optimized without
      VDW terms
      _database_code_amcsd 0013987

      CELL PARAMETERS:    4.2610   4.2610   4.2610   90.000   90.000   90.000
      SPACE GROUP: Ia3       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     77.363
      Density (g/cm3):      4.124
      MAX. ABS. INTENSITY / VOLUME**2:      9.227841439    
      RIR:      0.729
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                42.43         49.87        2.1305    2   0   0         6
                52.61        100.00        1.7395    2   1   1        24
                61.56          3.33        1.5065    2   2   0        12
                85.21         55.96        1.1388    3   1   2        24
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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.