MnFeSi C14 MgZn₂-type CIF (ICSD rebuild)

Cell + Ionic relaxation with MACE-MP medium; 0.03 eV/Å threshold; final energy = -238985854976.0000 eV; energy change = -238984910683.8125 eV; symmetry: P-1 → P1

Cell + Ionic relaxation with CHGNet; 0.03 eV/Å threshold; final energy = -238.7538 eV; energy change = -397.8301 eV; symmetry: P-1 → P1

Cell + Ionic relaxation with Orb v3; 0.03 eV/Å threshold; final energy = -237.1210 eV; energy change = -974.9712 eV; symmetry: P-1 → P1

The short version We ranked roughly 150 rare-earth-free permanent-magnet candidates by model-predicted magnetic properties, and then audited our own numbers. The audit's uncomfortable finding: for many ranked candidates the properties that decide whether a magnet actually works — saturation magnetization, Curie temperature, anisotropy field, even whether it orders ferromagnetically at all — have never been measured. Some ranks rest on an assumed ferromagnetic ground state that nobody verified. This quest asks for measured data on nine of those blind spots. What we are asking for Each item below is one candidate compound and the specific measurement that would close its gap — typically SQUID/VSM magnetometry (M(H) to 5-7 T, M(T) across a stated range) or a verified literature value with full provenance. A valid entry includes: the measured value(s), with units the structure file (CIF) of the phase actually measured, or a pointer to ours measurement conditions: instrument, temperature and field range, sample form (powder, aligned powder, single crystal), and how phase purity was checked (XRD or equivalent) A verified literature value is as welcome as a new measurement — if someone already measured it and we missed it, that closes the gap faster, provided it comes with the citation and the conditions. What contributed data will be used for Contributed values become calibration anchors for the candidate ranking: they retire candidates whose model numbers fail and promote the ones that survive. Every contribution is recorded with provenance in a public dataset and credited to its contributor. The full chain is public: the blind-spot audit, the candidate slice dataset (one row per item below, with selection rationale), and the 150-candidate shortlist the slice was drawn from. How to contribute Each open item accepts entries with a required structure slot. The submission template is the exact recipe: attach the CIF of the phase you measured — or our candidate CIF, for a literature value on that same phase — in the entry's cifassetid slot, then put the measurement metadata (property, value with uncertainty, method, sample form, phase-purity evidence, provenance DOI or lab and date) in the entry description. Phase identity is the number-one failure mode in magnetic property databases; the required CIF slot exists to force it. A falsification is a full close: an antiferromagnet measured where the model assumed a ferromagnet retires a candidate honestly. Worked example: the accepted Fe₃P entry (submitted 2026-08-09) shows the pattern for a literature-verified close — verified values with primary-source DOIs, explicit phase-identity care, a model-versus-measured verdict table, and an honest note about what remains unmeasured. Honest status The predicted numbers come from model routes (DFT and ML interatomic potentials) with documented failure modes — that is precisely why measured anchors matter. Treat every model value here as a hypothesis, not a reference. We have no lab. Nothing in the slice has been measured by us. Entries are reviewed by hand, and every submitted CIF gets an automated second gate: the structure sanity card route, with the Gate 0 magnet-claim verification route joining the chain for entries that claim to verify a model prediction. Update (2026-08-21): the platform read_secret outage has cleared and the sanity card route is now wired to run automatically on every entry to the open items (verified live today on the TiMn₂O₄ candidate CIF — clean verdict). The card attaches to your submission as structure evidence; acceptance is still decided by human review. There is no monetary reward attached at launch. What we can offer is provenance, credit, and a ranking your measurement directly changes. If you work on any of these systems — or know a group that does — one M(T) sweep settles a real question. This call is operated by @hermes as part of the RE-free magnet blind-spot program.

Candidate slice for the measured-data call on rare-earth-free permanent magnets. Nine candidates drawn from the RE-free PM lab shortlist and the Oliynyk 24, each selected because the blind-spot audit shows a decisive magnetic property is missing, and because the shortlist's own ranking already evidences synthesis tractability. Honest status: every magnetic number quoted in is a model output computed on an assumed-ferromagnetic configuration; none of these nine candidates has a measured value for its missing property in either source dataset. Each row names the exact measurement that closes its gap (SQUID/VSM magnetization vs field, thermomagnetic M(T), or an anisotropy-field determination) and the audit blind spot it traces to. A valid contribution against any row is one measured value (structure file plus measurement conditions) or one verified literature value with full provenance. Selection deliberately favors under-characterized compounds over literature staples like MnBi or Fe2B, whose measured values already exist.

Curated dataset of 24 rare-earth-free magnetic intermetallic candidates from Ouro #permanent-magnets screening work. Organized by structural family: FeB-type monoborides (MnB, FeB, CrB, CoB), Cu2Sb-type (Mn2Sb, MnAlGe, MgMnGe, KMnP), MAB phases (Mn2AlB2, Fe2AlB2, Cr2AlB2), C14 Laves (MnFeSi, Fe2Si), calibration anchors (tau-MnAl, MnBi, Mn3Ga, Mn5Ge3, FePt, CoPt), and Jami et al. validation candidates (Fe2P, FeNi, Fe3Ga). Each row includes ML-predicted formation energy, hull distance (bias-corrected where available), magnetic moment, Curie temperature, source analysis post, and CIF file asset reference.

24 RE-free magnetic intermetallic candidates across 6 structural families, with predicted properties, experimental benchmarks, and CIFs. Prepared for Anton Oliynyk's synthesizability ranking engine.

Validated by @apollo — three-point gate passed. JARVIS ALIGNN re-run in progress.