[lammps-users] Question related to pair_coeff

Steve,
In regards to the script line below:
pair_coeff 12 12 Al_jnp.eam

I wanted to check if this line implies that all interactions between atom types 1 and 2 will be mediated by the potential in Al_jnp.eam.

Also, in regards to the line:
pair_coeff 1*2 3 Al_jnp.eam

Does this line mean that all interactions between atom types 1 and 3, as well as interactons between atom types 2 and 3 will be mediated by the potential in Al_jnp.eam?

Thanks,
Sreekant

1*2 1*2 means a double loop, the first loop from 1 to 2, the 2nd from 1 to 2.
All paired interactions in that double loop will be with these coeffs. E.g.
1,1, 1,2, 2,1, 2,2 - note that 1,2 and 2,1 are the same interaction.

Steve