Datasets are deposited with the CCDC through journal deposition arrangements with publishers, contributed directly by individuals or identified by our editorial team. They are held on trust on behalf of journals and individuals until we are informed that they can be made public. On publication, datasets are made freely available to everyone.
All structures are added to the Cambridge Structural Database (CSD) where the data is enhanced by the addition of bibliographic and chemical text, chemical structural data, and the results of crystal structure validation. Our free services provide access to both the deposited datasets and validated structures from the CSD on an individual basis.
The CSD-System facilitates comprehensive and systematic search, analysis and visualisation of data in the CSD and access to this is probably available within your institution. This includes access to advanced searching through a web-based interface. Software applications such as Mercury for structure visualisation and enCIFer for CIF format checking are also available free of charge along with database subsets that support teaching activities.
Financial contributions received through subscriptions to the CSD-System allow the CCDC to provide deposition, dissemination and preservation services free of charge to the wider community. Data access policies for public services reflect this and also seek to ensure that the provenance of data entrusted to us by the community is preserved.
Data Access Policies
- Public CCDC services allow the view and download of individual structures and associated data. These services must not be used to systematically download or redistribute these structures, data or associated information.
- Programmatic access to these services is not permitted.
- Services that do enable systematic search, retrieval and analysis of crystal structures are available through the CSD-System and other CCDC services, including our licensed web service for advanced searching.
- Any reference to CCDC identifiers, associated citations and the CCDC header included in data files must be retained to preserve the provenance of the file and to allow appropriate attribution of the data.
- If you publish research based on structures retrieved through this service, please credit the original researchers by citing associated articles or the dataset itself.
- We do ask that you provide us with your email address and affiliation before downloading data. Providing this information allows us to better understand usage patterns, helping us to improve our services and report on the value and impact of our services to our stakeholder communities.
- We may occasionally use personal information to seek your feedback or to contact you in relation to our services via email. We will not pass your personal details on to others without your explicit permission.
- To opt out of providing personal details, click on "How this helps" in the "Download deposited CIF" dialog and select the appropriate option.
- We reserve the right to restrict access to this service if we detect patterns of use that breach these terms and conditions, and/or which may compromise our internal systems or our ability to make data available to users.
- The data we share, and the resources on this site, are provided on an "as is" basis without warranty of any kind, either expressed or implied.
- To the maximum extent permissible by law, CCDC hereby excludes all liability for any direct, indirect, special, incidental, or consequential loss or damages, including lost profits, arising from the use of the CCDC archive or the resources on this site.
You can cite the articles associated with a dataset using the publication information in CIF data items or displayed on the structure summary page. Alternatively, most datasets have a CCDC DOI and can be cited as follows:
Gao, Yu; Wang, Jun; Zhang, Chao-Feng; Xu, Xiang-Hong; Zhang, Mian; Kong, Ling-Yi; (2014).
CCDC 940012: Experimental Crystal Structure Determination; Cambridge Crystallographic Data Centre. http://dx.doi.org/10.5517/CC10K4ZP.
For questions about accessing data or using our web services, please see our Support Pages. To find out about obtaining access to the CSD-System, including advanced web-based search options, please use our Enquiries Page.