1. Supported in part by Office of Naval Research Contract N00014–79-C-0814.
2. For extensive references and many valuable papers on SiO2, see: S. T. Pantelides, ed., The Physics of SiO2 and its Interfaces (Pergamon Press, New York, 1978).
3. F. Herman, I. P. Batra, and R. V. Kasowski, in Ref. 2, p. 333.
4. Interatomic Distances Supplement;Sutton,1965
5. Electronic structure calculations of interfaces and overlayers in the 1980’s