Research Data Policy

JMRC supports open, reproducible research. Authors are expected to make the data underlying their findings available wherever possible, and every article explains how those data can be accessed.

Data availability statement

Every research article must include a data availability statement explaining where and how the data supporting its results can be accessed. For example:

• “The data supporting the findings of this study are openly available in [repository name] at https://doi.org/[DOI].”
• “The data are available within the article and its supplementary material.”
• “The data are available from the corresponding author on reasonable request.”
• “The data cannot be shared because of [confidentiality, commercial or legal] restrictions; [conditions of access, if any].”

The statement can be entered in the Data Availability field of the submission form and is published with the article.

Sharing data in repositories

We encourage authors to deposit data in a recognised repository that assigns persistent identifiers, and to cite the dataset in the reference list. Suitable repositories include:

• general-purpose repositories such as Zenodo, Figshare, Mendeley Data and Dryad;
• materials-specific resources such as Materials Cloud and NOMAD for computational data, and the Cambridge Structural Database or the Inorganic Crystal Structure Database for crystal structures;
• institutional or national data repositories.

Data should be shared in line with the FAIR principles, so that they are findable, accessible, interoperable and reusable.

What to share

• The data underlying the figures and tables, in a usable format rather than only as images.
• For crystal structures, crystallographic information files (CIF), deposited in the appropriate database.
• For computational studies, input files, key parameters and, where possible, the code, its version and its repository.
• Enough metadata (such as instrument settings, processing steps and units) for others to understand and reuse the data.

Code and software

Authors who develop software or code as part of their research are encouraged to make it available in a public repository, with a licence and a version identifier, and to cite it in the article.

Exceptions

Some data cannot be shared openly, for example because of confidentiality, commercial agreements or national regulations. In such cases, the data availability statement should explain the restriction and any conditions under which access may be granted.

Editorial checks

Editors and reviewers may ask to see the underlying data during peer review, and refusal to provide data needed to evaluate the work may lead to rejection. Concerns about data raised after publication are handled under our Publication Ethics policy.