# Define looping variables
variable loopcount loop 42
variable latticeconst index 13.981700 13.044872 12.464263 12.042420 11.710902 11.437769 11.205503 11.003451 10.824650 10.664296 10.518937 10.386007 10.263546 10.150025 10.044228 9.945169 9.852042 9.764176 9.681008 9.602062 9.526929 9.455258 9.386744 9.321120 9.276445 9.229427 9.179806 9.127276 9.071476 9.011970 8.948233 8.879615 8.805306 8.724277 8.635189 8.536262 8.425049 8.298059 8.150065 7.972714 7.751404 7.456900 

# Define unit set and class of atomic model
units metal
atom_style atomic

# Periodic boundary conditions along all three dimensions
boundary p p p

# Create a diamond lattice using a single conventional (orthogonal)
# unit cell with a lattice constant from the 'latticeconst' variable defined on line 3 above
lattice diamond ${latticeconst}
region box block 0 1 0 1 0 1 units lattice
create_box 1 box
create_atoms 1 box
mass 1 40.078

# Specify which KIM Model to use
pair_style kim EAM_IMD_BrommerGaehlerMihalkovic_2007_CaCd__MO_145183423516_003
pair_coeff * * Ca

# Set what thermodynamic information to print to log
thermo_style custom step atoms xlo xhi ylo yhi zlo zhi pe press pxx pyy pzz pxy pxz pyz
thermo 10 # Print every 10 steps

# Set what information to write to dump file
dump id all custom 10 output/lammps.dump id type x y z fx fy fz
dump_modify id format line "%d %d %16.7f %16.7f %16.7f %16.7f %16.7f %16.7f"

# Compute the energy and forces for this lattice spacing
run 0

# Define auxiliary variables to contain cohesive energy and equilibrium lattice constant
variable poteng    equal "c_thermo_pe"
variable natoms    equal "count(all)"
variable ecohesive equal "v_poteng/v_natoms"

# Output cohesive energy and equilibrium lattice constant
print "Cohesive energy = ${ecohesive} eV/atom"

# Queue next loop
clear # Clear existing atoms, variables, and allocated memory
next latticeconst # Increment latticeconst to next value
next loopcount # Increment loopcount to next value
jump SELF # Reload this input script with the new variable values