COL  ICSD Collection Code 66470
 DATE Recorded Jan 6, 1993; updated Jun 26, 1998
 NAME Carbon
 MINR Diamond 21R
 FORM C
      = C
 TITL Calculated x-ray diffraction data for diamond polytypes
 REF  Journal of the American Ceramic Society
      JACTA 75 (1992) 1876-1883
 REF  Journal of Materials Research
      JMREE 5 (1990) 2272-2285
 AUT  Ownby P D, YangÿX, LiuÿJ
 CELL a=2.522 b=2.522 c=43.245 à=90.0 á=90.0 ç=120.0
      V=238.2 Z=42
 SGR  R -3 m H      (166) - trigonal
 CLAS -3m   (Hermann-Mauguin) - D3d (Schoenflies)
 PRS  hR42
 ANX  N
 PARM Atom__No OxStat  Wyck ---X--- ---Y--- ---Z---  -SOF-
      C      1  0.000    6c  0.      0.      0.01786
      C      2  0.000    6c  0.      0.      0.17262
      C      3  0.000    6c  0.      0.      0.20833
      C      4  0.000    6c  0.      0.      0.26786
      C      5  0.000    6c  0.      0.      0.30357
      C      6  0.000    6c  0.      0.      0.41071
      C      7  0.000    6c  0.      0.      0.44643
 WYCK c7
 REM  THE (structure thoretically calculated)
 REM  COR (correction of earlier work)
 TEST No R value given in the paper. (Code 51)
 TEST At least one temperature factor missing in the paper. (Code 53)