Reference
Set the type of cluster to create,
container or
polytope.
A
container cluster is a recursive object that can contain
arbitrary sets of child objects such as clusters, molecules, groups,
planes, directions, atoms, bonds, texts.
A
polytope cluster describes the set of Voronoi polyhedra resulting
from a Voronoi analysis of some initial
container cluster, and the
Voronoi conditions selected containing an arbitrary set of atoms.
Example: <group ... reference="container"/> (default)
Allowed values: container, polytope (optional)