# Site type with fixed occupancy, sites of these type will NOT be optimized
# in EvolutionarySQS.
site_a = AlloySite(Arsenic=1.0)

# Site type with fractional occupancy, site of these type will be optimized
# in EvolutionarySQS.
site_b = AlloySite(Gallium=0.5, Indium=0.5)

# Site type with an element and a vacancy.
site_c = AlloySite(Silicon=0.8, Vacancy=0.2)