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Mesocrystal particle

A mesocrystal is a crystal-like grain, defined by an internal crystal lattice and an outer shape.

The Mesocrystal object is created via

meso = ba.Mesocrystal(crystal, outer_shape)

and requires the objects crystal and outer_shape to be defined.

outer_shape is a hard form factor describing the shape and size of the mesocrystal:

outer_shape = ba.Cylinder(20*nm, 50*nm)

crystal is built from the basis particle and a 3D lattice:

# Basis particle
inner_ff = ba.Sphere(3*nm)
basis = ba.Particle(material, inner_ff)

# 3D lattice
lattice = ba.Lattice3D(
    ba.R3(8*nm, 0, 0),
    ba.R3(0, 8*nm, 0),
    ba.R3(0, 0, 8*nm),
)

# Crystal
crystal = ba.Crystal(basis, lattice)

Alternatively, basis can be not just a simple particle, but also another composition:

basis = ba.Compound()

or

basis = ba.CoreAndShell(core, shell)

or even

basis = ba.Mesocrystal(crystal_node, outer_shape_node)

Example