A comprehensive system for geometrical
and topological analysis of crystal structures
On this new ToposPro website we offer the
following products and services:


ToposPro software is free for noncommercial use only. For commercial use, it's necessary to send an application through feedback form.

FREE Service for determining the underlying topology of your crystal structure

Upload CIF file get the topological type

H-bonded molecular MOFs,
standard representation

  Upload CIF file and get the topological type of your crystal structure for free


We provide various forms of support of the ToposPro users and the reseearches who would like to include topological analysis in their investigation. The main services
are collected below; please also pay attention to our FAQ service, webinars and schools.

ToposPro research support

This service provides email consultations on the ToposPro applications for solving research tasks, in particular, which ToposPro algorithm (a sequence of operations) is required for a given task.
Description of the crystal structure topology

If you need a professional topological and geometrical analysis of the crystal structure of your compound(s) you may ask us to help you.

Topological analysis of large sets of crystal structures

We can perform a statistical analysis of topological properties of large sets of crystal structures to reveal general trends and/or regularities for the class of compounds under your interest.

Topological solutions of specific research problems

We can apply the topological methods to solve specific tasks of crystal chemistry and design.

Latest version:

  System Requirements

Windows 10, 8.1, 8, 7, Vista and XP.
Including both 32-bit and 64-bit

Free for noncommercial use only


For commercial use, it's necessary
to send an application through
feedback form.


ToposPro is a program package for comprehensive analysis of geometrical and topological properties of periodic structures (crystals, networks, tilings). ToposPro was tailored to process large samples of crystallographic data and to find correlations between structure parameters. The ToposPro software includes Database Management System and a number of applied programs and procedures, many of which realize unique algorithms of crystal structure analysis. The ToposPro Topological Collections contain a large set of databases on geometrical and topological properties of atoms, molecules, structural units, periodic networks, tilings, entanglements, and other finite and infinite crystal architectures. With ToposPro you may explore any kind of crystal structure and solve many important tasks of crystal chemistry, structural chemistry, and materials science.


Topological databases


Topos Topological Database
This collection contains the information on topological types of simple periodic nets and finite graphs. The TTD collection is used for automatic determination and classification of topologies.

Topological Types of Molecules
This collection contains the information on molecules, their, forms, and types of connection in crystals.

Topological Types of Nanoclusters
This collection contains the information on chemical composition, topological structure and methods of connection of polyshell nanoclusters in intermetallic compounds.

Topological Types of Ligands
This collection contains the information on ligands and their coordination modes in mononuclear, polynuclear and polymeric coordination compounds.
Total entries: 181,729
Total entries: 402,618
Total entries: 2,017
Total entries: 199,225

Topological Types Observed
This collection matches topological types of abstract nets and graphs collected in the TTD with examples of real crystal structures.

Topological Types Relations
This collection is based on the TTO collection and lists all ways of transformation from one net to another that are realized in crystal structures.

Topos Topological Samples
This collection contains 14,832 topological type samples of underlying nets obtained by simplification of 13,644 real crystal structures.
Total entries: 1,795,772
Total entries: 5,977
Total entries: 14,832

You can also buy the databases and get a discount for collections of the databases.

ToposPro experts

Now hundreds of researchers use ToposPro and some of them have already become experts in specific ToposPro parts. If you have questions concerning ToposPro you may use our FAQ service, but you may also address to the people who work independently of our group and have their own experience with the ToposPro tools. Please pay attention to the area of expertise of each expert and use the ‘Ask question’ link to contact to the expert.

Davide M Proserpio
Professor. Università degli Studi di Milano, Italy

Analysis of coordination polymers, MOFs and supramolecular architectures (H-bonds, Halogen bonds): nets classification, entanglement, tiling.

Ask Questions
Falk Meutzner
Research Associate. TU Bergakademie Freiberg, Germany

Dirichlet, StatPack, Ionic conductors.

Ask Questions
Pavlo Solokha
Researcher. Università degli studi di Genova, Italy

Crystallochemical analysis of intermetallics, their classification; group-subgroup relations, equivalent representations of the structures, etc.

Ask Questions
George Kostakis
Senior Lecturer. University of Sussex, United Kingdom

Polynuclear Coordination Clusters

Ask Questions

The whole panel of experts.

Research directions

ToposPro is a universal analyzer, which can be used for exploring crystal structures of any nature, composition, and complexity. We develop ToposPro in collaboration
with our colleagues from quite different fields of chemistry, crystal chemistry, and materials science. They formulate tasks, we improve ToposPro and propose solutions.
In this part, we have gathered the main directions, in which we collaborate and extend the ToposPro abilities. You may find your task in these direction or propose your
own and contact us within our "Topological solutions of specific research problems" service. Make your contribution to ToposPro and solve your research problem!

And other research directions.