# What will be the cohesive energy of an alloy in LAMMPS?

The cohesive energy of a pure material is generally termed as the energy of a unit cell divided by the number of atoms. what will be cohesive energy of an alloy in LAMMPS? I am running LAMMPS for $$\ce{UO2}$$ with different potentials and found that the total energy of the system is different for different potentials, but the lattice parameter matches well.

• +1 but please take a careful look at my edit to see some of the things you'd hopefully do next time so that others don't have to do it! Mar 26 at 5:18
• It is normal that you get different energy (even different results) with different potentials. This is one of the weakness of Molecular Mechanics: each forcefield is different and tailored to work well with a reduce set of atoms.
– Camps
Mar 26 at 16:28
• @Camps what about cohesive energy of alloy? Any idea Mar 26 at 16:51