Preferred Label : extent of an interface (surface);
IUPAC definition : A quantity measured by its area, A (or S). For solids, a real (true, actual) and a
geometric surface (interface) area, Ar and Ag, respectively, may be defined if asperities
are present whose height is orders of magnitude greater than the atomic or molecular
size. The geometric surface is the projection of the real surface on a plane parallel
to the macroscopic, visible phase boundary. If asperities are of the order of the
atomic size, the surface of the solid may be described as stepped. (High index faces
of crystals are stepped surfaces but may be ideally smooth in the sense of the roughness
factor.);
Origin ID : E02282;
See also
A quantity measured by its area, A (or S). For solids, a real (true, actual) and a
geometric surface (interface) area, Ar and Ag, respectively, may be defined if asperities
are present whose height is orders of magnitude greater than the atomic or molecular
size. The geometric surface is the projection of the real surface on a plane parallel
to the macroscopic, visible phase boundary. If asperities are of the order of the
atomic size, the surface of the solid may be described as stepped. (High index faces
of crystals are stepped surfaces but may be ideally smooth in the sense of the roughness
factor.)
