Crystallography Open Database (COD)
Crystallography Open Database (COD)
Open-access collection of crystal structures of organic, inorganic and metal-organic compounds and minerals (excluding biopolymers), published as CIF files with a web search that can return JSON results.
Required Attribution:
Not legally required under CC0; COD asks: "Users of the data should acknowledge the original authors of the structural data."
Coverage
Crystal structures deposited by contributors, each available as a CIF file under a numeric COD ID, searchable by formula and other criteria. History start and update frequency: Not stated.
Verdict
CIF files plus a keyless search interface with JSON output for COD crystal structures. Licensed CC0-1.0: the COD home page says: "All data in the COD and the database itself are dedicated to the public domain and licensed under the CC0 License ." It also says: "Users of the data should acknowledge the original authors of the structural data." Rate limits: Not stated. Signal Lab links only.
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