We propose a new phenomenological derivation based on superconducting lattice geometry of the temperature dependence of the coherence length ξ and critical field H c. In the framework of a bifluid model, we express the concentrations of superconducting and normal electrons taking into account microscopic geometrical considerations. Taking into account that the superconducting particles are driven intonormal state by thermal energy transfer, we derive the temperature dependence of the coherence length. Subsequently, after applying a magnetic field at a fixed temperature and considering that the magnetic field energy is responsible for the transition of superconducting particles into the normal state we derive the temperature dependence of the critical field. We consider the cases of two- and three-dimensional lattices. The derived temperature dependencies of ξ and H c are in good agreement with the previous theories.