1. Open the database

The rules (a)-(d) and the algorithm for computing natural tiles are described by Blatov V.A., Delgado-Friedrichs O., O’Keeffe M., Proserpio D. M. (Acta Cryst. (2007),

(a) the tiling must have the symmetry of the net (be

(b) the faces of tiles must be locally strong rings (no tile has one face larger than the rest);

(c) a tile does not have non-face strong rings that do not intersect other such rings;

(d) when rules (a)–(c) result in multiple tilings because of intersecting strong rings, we use only the smaller of a pair if the intersecting rings are unequal in size and reject both if the intersecting rings are equal in size.

2. Run ADS and select all atoms in the

The line

Not all rings are

The line

Some other features of the tiling are indicated, in particular, this tiling is

The table consolidates the main data on all possible

3. Perform

4. Grow the net several times until the

5. Go to the

6. Expand the tiling tree. Hold down the “ctrl” and choose all tiles and click

7. Check that all atoms were not selected. Grow up a structure (2 clicks). In the

Further, use Cylinder model . Then deselect all atoms. Three types of tiles will show as green.

8. Close the IsoCryst and ADS windows and run the