COL  ICSD Collection Code 66560
 DATE Recorded Jan 19, 1994
 NAME Aluminium oxide (2.4/3.6) - theta
 FORM Al2.427 O3.64
      = Al2.427 O3.64
 TITL Structures and transformation mechanisms of the eta, gamma and 
      theta transition aluminas
 REF  Acta Crystallographica B (39,1983-)
      ASBSD 47 (1991) 617-630
 AUT  Zhou R-S, SnyderÿRÿL
 CELL a=11.854 b=2.904 c=5.622 à=90.0 á=103.8 ç=90.0
      V=187.9 Z=3
 SGR  C 1 2/m 1     (12) - monoclinic
 CLAS 2/m   (Hermann-Mauguin) - C2h (Schoenflies)
 PRS  mC18
 ANX  A7X11
 PARM Atom__No OxStat  Wyck ---X--- ---Y--- ---Z---  -SOF-
      O      1 -2.000    4i  0.8272  0.      0.4273
      O      2 -2.000    4i  0.495   0.      0.2526    0.93(4)
      O      3 -2.000    4i  0.1611  0.      0.0984    0.80(2)
      Al     1  3.000    4i  0.6595  0.      0.3165    0.90(2)
      Al     2  3.000    4i  0.9166  0.      0.2073    0.92(2)
 WYCK i5
 ITF  O   1   B=1.
 ITF  O   2   B=1.
 ITF  O   3   B=1.
 ITF  Al  1   B=0.5
 ITF  Al  2   B=0.5
 REM  NDP (neutron diffraction from a powder)
 REM  RVP
 RVAL 0.093