1. 13. Pond R.C. , McAuley N. and Devenish R.W. , 1985, Inst. Phys. Conf. Ser. 76, 67.
2. 6.International Tables for Crystallography, 1983, D. Reidel Pub. Co., Boston.
3. 18. Eaglesham D.J. and Kiely C.J. , 1985, Proc. E.M.A.G., Inst. of Physics, London.
4. The growth of spinel into AI2O3
5. 11. Bartha J.W. and Henzler M. , 1985, Surf. Sci., in press.