Fig. 5: The contrived examples of three and fourfold nets.
From: Determining dimensionalities and multiplicities of crystal nets

Disconnected subnets are marked with different color. a A threefold net in the unit cell. b The threefold net in a 3 × 3 × 3 supercell. c A fourfold net in the unit cell. d The fourfold net in a 2 × 2 × 2 supercell.