## mass

### Syntax

mass atomic_mass

• atomic_mass = positive real number

### Examples

mass 63.546
mass 26.9815
mass 55.845


### Description

This command sets the atomic mass in g/mol. The three examples are for Cu, Al, and Fe, respectively, corresponding to those in the lattice command. Note the current PyCAC code can only simulate pure metals.

The mass matrix type in the finite element calculation in the coarse-grained domain is specified in the element command.

crystal.f90 and mass_matrix.f90

None.