  Using the model of hexagonal clusters we express the surface, curvature and
Gauss curvature coefficients of the nuclear binding energy in terms of its bulk
coefficient. Using the derived values of these coefficients and a single
fitting parameter we are able to reasonably well describe the experimental
binding energies of nuclei with more than 100 nucleons. To improve the
description of lighter nuclei we introduce the same correction for all the
coefficients. In this way we determine the apparent values of the surface,
curvature and Gauss curvature coefficients which may be used for infinite
nuclear matter equation of state. This simple model allows us to fix the
temperature dependence of all these coefficients, if the temperature dependence
for the bulk term is known. The found estimates for critical temperature are
well consistent both with experimental and with theoretical findings.
