COL  ICSD Collection Code 200140
 DATE Recorded Jan 1, 1980; updated Nov 10, 1997
 NAME ALUMINIUM OXIDE - Cr doped
 MINR Corundum - synthetic
 MINR (Ruby)
 FORM Al2 O3
      = Al2 O3
 TITL Crystal structure and compressibility of ruby to 80 kbar
 REF  Carnegie Institution of Washington: Yearbook
      CIWYA 76 (1977) 525-527
 AUT  Finger L W, HazenÿRÿM
 CELL a=4.761(1) b=4.761(1) c=12.995(2) à=90.0 á=90.0 ç=120.0
      V=255.1 Z=6
 SGR  R -3 c H      (167) - trigonal
 CLAS -3m   (Hermann-Mauguin) - D3d (Schoenflies)
 PRS  hR30
 ANX  A2X3
 PARM Atom__No OxStat  Wyck -----X----- -----Y----- -----Z-----  -SOF-
      Al     1  3.000   12c  0.          0.          0.3522(1)
      O      1 -2.000   18e  0.3061(5)   0.          1/4
 WYCK e c
 ITF  Al  1   B=0.31
 ITF  O   1   B=0.33
 REM  M PDF 43-1484
 RVAL 0.030