Crystallography Open Database (COD)

The Crystallography Open Database (COD) is an open-access collection of crystal structure data for organic, inorganic, and metal-organic compounds. It provides researchers with experimentally determined crystallographic information, typically stored in CIF (Crystallographic Information File) format.

Here’s the reality: COD is not a tool—you don’t “run” it. It’s a data source. Its value depends entirely on how you use the data (e.g., in VESTA, VASP, or CRYSTAL).

COD stores crystal structures submitted by researchers worldwide. These include lattice parameters, atomic coordinates, symmetry data, and experimental conditions.

All structures are available in CIF format, which is the standard format for crystallographic data and can be directly used in simulation and visualization tools.

Users can search the database by chemical composition, structure, or formula, and download relevant crystal structures.

Researchers can deposit their own crystallographic data, making COD a continuously growing and collaborative resource.

• Open-access crystal structure data
• CIF file downloads
• Search by chemical formula or structure
• Data for organic, inorganic, and hybrid materials
• Community-based data deposition
• Integration-ready with simulation tools
• Large and continuously updated dataset
• No licensing cost (open data)
• Accessible through web interface and mirrors

1. Access Website:
   Visit the COD platform.
2. Search Data:
   Use chemical formula, keywords, or structure search.
3. Select Structure:
   Choose relevant entry from results.
4. Download CIF File:
   Save structure data.
5. Use in Software:
   Import into tools like VESTA, VASP, or Materials Studio.
6. Analyze or Simulate:
   Perform visualization or computational studies.

• Completely free and open-access
• Large collection of crystal structures
• Essential for computational materials research
• Saves time compared to experimental structure determination
• Compatible with most simulation tools
• Supports reproducible research

• Data quality varies (not all entries are perfectly validated)
• Requires verification before use in serious research
• No built-in simulation or analysis tools
• Limited metadata compared to paid databases (e.g., ICSD)
• Depends on user expertise to interpret correctly

We provide access to external resources strictly for educational and informational purposes only. Users are responsible for verifying data accuracy and ensuring proper use in their work. We do not claim ownership of this database and are not responsible for any errors or issues arising from its use