Interpenetration vs. polycatenation 

Interpenetration	Polycatenation
The component motifs are infinitely extended 1D, 2D or 3D nets	The motifs can be 0D and 1D (with closed circuits) or 2D, of the same or of different types
The individual motifs have an identical topology	The individual motifs may have different topology
The number of the entangled motifs is finite	Infinite number of entangled motifs
The resulting dimensionality is the same of the component motifs	The resulting dimensionality is increased (for at least one motif)
Each motif is interlaced with all the other ones forming the array	Each motif is never interlaced with all the other ones of the array
The resulting entangled array is infinite periodic

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