Surface crystallography is a discipline which has come of age. There
exist in the literature several hundred complete determinations of
atomic configurations at surfaces: yet the number is not so great that
cataloguing these structures is too daunting a task. We felt that now
was the right moment to begin a compilation that could be updated at
frequent intervals to give a comprehensive picture of the known surface
world. The following pages are the product of our labours. Our target
community is the large number of surface chemists, materials scientists,
physicists and others whose work involves surfaces. As the compilation
expands with time our hope is that it will become one of the standard
reference works for structures: in the manner that Wyckoff and other
X-ray tables are for bulk crystals. We have devoted considerable thought
to the format. The system we have chosen will no doubt have its critics,
and in subsequent editions may well be improved, but it has been arrived
at after extensive consultation. A problem that we faced in putting
structures into standard format was the diversity of conventions used in
the literature. It is to be hoped that our system will have sufficient
virtue to serve as a standard format for future reporting of structures.
That would make it much easier for surface crystallographers to use the
work of others.