About The EPINET Project

Version 2.0 published November 2009

The EPINET project contributes to the enumeration of periodic networks in three–dimensional euclidean space () via two-dimensional hyperbolic tilings. These networks are of interest to geometers, structural chemists, and statistical physicists.

The EPINET website consists of databases of tilings and nets with an integrated search function, and substantial reference material.


To reference the website please use

S.J. Ramsden, V. Robins, S.T. Hyde, and S. Hungerford. “EPINET: Euclidean Patterns in Non-Euclidean Tilings.” 2005–2009. The Australian National University. <http://epinet.anu.edu.au/>

If appropriate please also cite the paper that describes the techniques we use to generate the tilings and nets in the EPINET databases:

S.J. Ramsden, V. Robins and S.T. Hyde, “Three-dimensional Euclidean nets from two-dimensional hyperbolic tilings: kaleidoscopic examples”, Acta Cryst. A 65, 81–108, (2009). [DOI link]

Technical aspects

EPINET is a database-backed Ruby-on-Rails site, using MySQL. Original data has been computed using a combination of custom Ruby and Python code, and the external packages KBMAG and Systre. Imagery is generated with custom tools using Ruby, KBMAG and Houdini, CrystalMaker, Python and pSpace.

Notes about revisions to the website content are posted on the Changelog.

The people involved

The EPINET team is Stephen Hyde, Stuart Ramsden and Vanessa Robins.

Many people have contributed in essential ways, we thank them on the acknowledgements page.

If you have questions or suggestions about the EPINET project, please contact us.