Thank you for your reply. Your previous answers have resolved all my confusion. As a beginner in CP2K, I have one further question: If I want to construct ADMM auxiliary basis sets on my own, are there any specific examples or websites with relevant tutorials that I could refer to? Additionally, could you please briefly explain the main steps for building ADMM auxiliary basis sets, as well as how the quality or success of a self-constructed auxiliary basis set is typically evaluated?<div class="gmail_quote"><div dir="auto" class="gmail_attr">在2025年10月13日星期一 UTC+8 20:20:52<Jürg Hutter> 写道： </div><blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hi For correct calculations you need to have consistent pseudpotentials/basis sets. For example LnPP1_POTENTIALS / BASIS_MOLOPT_LnPP1 (I would take those) or the potentials and basis sets from <a href="https://www.basissetexchange.org/" target="_blank" rel="nofollow" data-saferedirecturl="https://www.google.com/url?hl=zh-CN&q=https://www.basissetexchange.org/&source=gmail&ust=1760664366856000&usg=AOvVaw0GK0iaeoprccA3OaMV-lBH">https://www.basissetexchange.org/</a> At least for Ce you can find more possibilities in the (CP2K) literature. For HFX/ADMM calculations you need corresponding ADMM basis sets. I would suggest to produce your own. Check the atomic code input examples on how to generate a basis and follow the advice in the original ADMM paper. regards JH ________________________________________ From: <a href data-email-masked rel="nofollow">cp...@googlegroups.com</a> <<a href data-email-masked rel="nofollow">cp...@googlegroups.com</a>> on behalf of <a href data-email-masked rel="nofollow">yis...@163.com</a> <<a href data-email-masked rel="nofollow">yis...@163.com</a>> Sent: Wednesday, October 8, 2025 5:24 AM To: cp2k Subject: [CP2K:21882] How to Perform Hybrid Functional Calculations on La2O3 and CeO2 without ADMM? Dear CP2K developers and users, Hello everyone, I am currently working on the Pourbaix diagram of lanthanide elements and would like to use CP2K to perform hybrid functional calculations for La₂O₃ and CeO₂. However, since there are no default ADMM basis sets available for lanthanides, the calculations are extremely slow—to an extent that is hardly acceptable. For systems doped with La and Ce, I managed to proceed by using the auxiliary basis sets of La and Ce as the primary basis sets. Although this approach also slows down the calculation, it is still acceptable. However, when it comes to hybrid functional calculations for pure La₂O₃ and CeO₂, the computation becomes practically infeasible. What should I do in such a situation? I found the def2-SVP basis set on the website <a href="https://www.basissetexchange.org/" target="_blank" rel="nofollow" data-saferedirecturl="https://www.google.com/url?hl=zh-CN&q=https://www.basissetexchange.org/&source=gmail&ust=1760664366856000&usg=AOvVaw0GK0iaeoprccA3OaMV-lBH">https://www.basissetexchange.org/</a>, and I’ve heard that this basis set should be used together with the SDD pseudopotential. May I ask a beginner-level question: where can I download the SDD pseudopotential? Is it the same as the ECP_POTENTIAL pseudopotential provided in the CP2K folder? I would greatly appreciate any guidance or suggestions from the community. Thank you all in advance for your help! -- You received this message because you are subscribed to the Google Groups "cp2k" group. To unsubscribe from this group and stop receiving emails from it, send an email to <a href data-email-masked rel="nofollow">cp2k+uns...@googlegroups.com</a><mailto:<a href data-email-masked rel="nofollow">cp2k+uns...@googlegroups.com</a>>. 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