Summary of corundum structure

[sanjoy { *at * } sg17.chem.upenn.edu (Sanjoy Bandyopadhyay)]

 Hi all:
 Thanks for your prompt and useful advice.  I now
 have a collection of the references for the
 corundum strucure and I will share them with you:
 In my opinion the most concise reference for the
 xtal structure is given in
 H. d'Amour et al in J. Appl. Phys. 49, 4411 (1978)
 This give the parameters for both the rhomobhedral
 and hexagonal structures.
 A good reference to check your generated structure with
 is
 R.E. Newnham and Y.M. de Haan, Zeitschrift fur Kristallographie
 117, 235-237 (1962).
 This gives all of the unique angles and distances for the generated
 xtal structure on page 237.
 For another refernce giving the Al-O and Al-Al distances
 and hexagonal parameters
 J. Lewis et al, Acta Cryst. A 38, 722-739 (1982)
 on page 736.
 For a nice picture of the rhomohedral unit cell consult
 L. Pauling and B. Hendricks, JACS 47, 781 (1925).
 Warning: The lattice paramters in the Pauling paper
 are not refined, so don't try to check your distances
 with his results.  Its just a nice picture of the unit
 cell.
 Thanks again, and I hope this helps!
 CJM