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license: cc-by-nc-4.0
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license: cc-by-nc-4.0
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<p align="center">
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<img src="assets/oxtal-logo.png" alt="OXtal: Generative Molecular Crystal Structure Prediction" width="900"/><br>
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<a href="https://arxiv.org/abs/2512.06987"><img src="https://img.shields.io/badge/arXiv-94133F?style=for-the-badge&logo=arxiv" alt="arXiv"/></a>
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<a href="https://oxtal.github.io/"><img src="https://img.shields.io/badge/📝%20Blog-007A87?style=for-the-badge&logoColor=white" alt="Blog"/></a>
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<a href="https://github.com/OXtal/OXtal"><img src="https://img.shields.io/badge/GitHub-747474.svg?style=for-the-badge&logo=GitHub&logoColor=white" alt="HF"/></a>
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</p>
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**OX**tal (**O**rganic **X** "Crys-" tal) is an all-atom diffusion model for molecular crystal structure prediction (CSP).
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Unlike traditional quantum-chemical approaches, which rely on expensive energy oracles, OXtal generates fast and accurate zero-shot
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predictions at a fraction of the cost. Specifically, OXtal recovers experimental crystal structures for both rigid and flexible molecules,
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as well as co-crystals, with conformer RMSD1 < 0.5 Å and attains over 80% packing similarity rate, demonstrating its ability to model
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both thermodynamic and kinetic regularities of molecular crystallization.
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The model was introduced in the paper, [OXtal: An All-Atom Diffusion Model for Organic Crystal Structure Prediction](https://arxiv.org/abs/2512.06987) (ICLR 2026).
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## Dataset Information
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This dataset contains the list of CCDC ids used to train OXtal. We defer to the official CCDC CSD database for actual crystal structure retreival.
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Please contact CCDC to obtain a proper [CCDC License](https://www.ccdc.cam.ac.uk/support-and-resources/licensing-information/).
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