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Figure 2
Internal and external intersections. (a) An orbit with no intersection, (b) an orbit with internal intersection, (c) a combined orbit produced by two crystallographic orbits that have no internal intersections, and (d) a combined orbit containing both external and internal intersections. When intersecting positions within (b) a single orbit or (c) and (d) multiple orbits form a combined site, then in order to preserve the total number of atoms in the cell while describing the structure in terms of combined sites we introduce the appropriate multiplicity for that site.

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APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
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