# Fe–Pb system > Fe–Pb system: 11 accepted literature values (invariant reaction 11) and 2 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote. HTML: https://data.orchid-project.org/systems/FE-PB.html · Markdown: https://data.orchid-project.org/systems/FE-PB.md 11 accepted literature values from 1 paper(s) (model 11); 2 calculated phase diagram(s). 17 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV. Data: [JSON](https://data.orchid-project.org/literature/systems/FE-PB.json) · [CSV](https://data.orchid-project.org/systems/FE-PB.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#FE-PB) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#FE-PB/FePb-11Vaa.json) · [phases (5)](https://data.orchid-project.org/phases/pages/FE-PB.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/FE-PB.html) · [Markdown](https://data.orchid-project.org/systems/FE-PB.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | model | 11 | Table: Accepted values by property group | Property group | Values | |---|---:| | invariant reaction | 11 | ## Calculated phase diagrams Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model. Table: Assessments with a calculated phase diagram | TDB file | Assessment | SHA-256 | Links | |---|---|---|---| | FePb-11Vaa.tdb | I. Vaajamo, P. Taskinen, Thermochim. Acta, 524, 56-61(2011). [doi:10.1016/j.tca.2011.06.014](https://doi.org/10.1016/j.tca.2011.06.014) | `05c82ebb8d79a2c26d144a6dc127bdb45599d84fd916a9dbfafcbdadaa63cf29` | [viewer](https://orchid-project.org/phase-diagrams/#FE-PB/FePb-11Vaa.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FePb-11Vaa.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FePb-11Vaa.json) | | FePb-87Din-LB.tdb | A.T. Dinsdale, D.D. Gohil, NPL, unpublished work, 1987. | `b26c9577ad72412f662da7af2a8dd1b0fb60605e0fdd2913c035404ab4ab631e` | [viewer](https://orchid-project.org/phase-diagrams/#FE-PB/FePb-87Din-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FePb-87Din-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FePb-87Din-LB.json) | Table: Calculated three-phase invariants (model, mole fraction of the second component) | TDB file | T (K) | Phases at the invariant | |---|---:|---| | FePb-11Vaa.tdb | 1809.58 | BCC_A2 (x(Pb) 1.000e-5) + LIQUID#2 (x(Pb) 7.100e-4) + LIQUID (x(Pb) 0.99424) | | FePb-11Vaa.tdb | 1809.58 | BCC_A2 (x(Pb) 1.000e-5) + LIQUID (x(Pb) 7.100e-4) + LIQUID#2 (x(Pb) 0.99424) | | FePb-11Vaa.tdb | 1667.46 | BCC_A2 (x(Pb) 1.000e-5) + FCC_A1 (x(Pb) 1.000e-5) + LIQUID (x(Pb) 0.99671) | | FePb-11Vaa.tdb | 1667.46 | FCC_A1 (x(Pb) 1.000e-5) + BCC_A2 (x(Pb) 1.000e-5) + LIQUID (x(Pb) 0.9967) | | FePb-11Vaa.tdb | 1667.46 | FCC_A1 (x(Pb) 1.000e-5) + BCC_A2 (x(Pb) 1.000e-5) + LIQUID (x(Pb) 0.9967) | | FePb-11Vaa.tdb | 1184.79 | BCC_A2 (x(Pb) 1.000e-5) + FCC_A1 (x(Pb) 1.000e-5) + LIQUID (x(Pb) 0.99981) | | FePb-11Vaa.tdb | 1184.79 | FCC_A1 (x(Pb) 1.000e-5) + BCC_A2 (x(Pb) 1.000e-5) + LIQUID (x(Pb) 0.99981) | | FePb-11Vaa.tdb | 600.62 | BCC_A2 (x(Pb) 0) + FCC_A1 (x(Pb) 0.99999) + LIQUID (x(Pb) 1) | | FePb-87Din-LB.tdb | 2020.84 | LIQUID (x(Pb) 0.00108) + LIQUID#2 (x(Pb) 0.98988) + GAS (x(Pb) 0.9995) | | FePb-87Din-LB.tdb | 1810.05 | BCC_A2 (x(Pb) 2.000e-5) + LIQUID (x(Pb) 4.800e-4) + LIQUID#2 (x(Pb) 0.99421) | | FePb-87Din-LB.tdb | 1810.05 | BCC_A2 (x(Pb) 2.000e-5) + LIQUID (x(Pb) 4.800e-4) + LIQUID#2 (x(Pb) 0.99421) | | FePb-87Din-LB.tdb | 1667.49 | FCC_A1 (x(Pb) 1.000e-5) + BCC_A2 (x(Pb) 1.000e-5) + LIQUID (x(Pb) 0.9966) | | FePb-87Din-LB.tdb | 1667.49 | BCC_A2 (x(Pb) 1.000e-5) + FCC_A1 (x(Pb) 1.000e-5) + LIQUID (x(Pb) 0.9966) | | FePb-87Din-LB.tdb | 1667.49 | FCC_A1 (x(Pb) 1.000e-5) + BCC_A2 (x(Pb) 1.000e-5) + LIQUID (x(Pb) 0.9966) | | FePb-87Din-LB.tdb | 1667.49 | BCC_A2 (x(Pb) 1.000e-5) + FCC_A1 (x(Pb) 1.000e-5) + LIQUID (x(Pb) 0.9966) | | FePb-87Din-LB.tdb | 1184.81 | FCC_A1 (x(Pb) 0) + BCC_A2 (x(Pb) 0) + LIQUID (x(Pb) 0.99977) | | FePb-87Din-LB.tdb | 1184.81 | BCC_A2 (x(Pb) 0) + FCC_A1 (x(Pb) 0) + LIQUID (x(Pb) 0.99977) | | FePb-87Din-LB.tdb | 1184.81 | FCC_A1 (x(Pb) 0) + BCC_A2 (x(Pb) 0) + LIQUID (x(Pb) 0.99977) | | FePb-87Din-LB.tdb | 600.61 | BCC_A2 (x(Pb) 0) + FCC_A1 (x(Pb) 1) + LIQUID (x(Pb) 1) | Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/FE/FE-PB.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/FE/FE-PB.json) · [CALPHAD hull FePb-87Din-LB](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-PB--FePb-87Din-LB.json) ## Invariant reactions (literature) Table: Invariant reactions reported in the literature for the Fe–Pb system (11) | T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote | |---:|---|---|---|---|---|---| | 4277.13 | critical point: L1 + L2 -> bcc + L2 | L1: Pb 0.496 | model | [1] Vaajamo 2011 | Table 3, p. 5, row 2; `ORC-GJ5NSB4I5L` | | | 4270 | critical point: L1 + L2 -> bcc + L2 | | model | [1] Vaajamo 2011; _cites Onderka 2004_ | Table 3, p. 5, row 1; `ORC-TEB5WELSMB` | | | 1809.7 | monotectic: bcc + L2 -> fcc + L2 | L2: Pb 0.9938 | model | [1] Vaajamo 2011; _cites Onderka 2004_ | Table 3, p. 5, row 4; `ORC-XOLKVG5HLK` | | | 1809.59 | monotectic: bcc + L2 -> fcc + L2 | bcc: Pb 1.000e-5; L2: Pb 0.9943 | model | [1] Vaajamo 2011 | Table 3, p. 5, row 5; `ORC-DHNCHKGY5I` | | | 1808.98 | monotectic: bcc + L2 -> fcc + L2 | bcc: Pb 0; L2: Pb 0.9916 | model | [1] Vaajamo 2011; _cites Hamalainen 1990_ | Table 3, p. 5, row 3; `ORC-K3D56MIYXZ` | | | 1667.7 | polymorphic: bcc + L2 -> fcc + L2 | L2: Pb 0.9965 | model | [1] Vaajamo 2011; _cites Onderka 2004_ | Table 3, p. 5, row 7; `ORC-QTY346PGAX` | | | 1667.47 | polymorphic: bcc + L2 -> fcc + L2 | bcc: Pb 0; L2: Pb 0.9949 | model | [1] Vaajamo 2011; _cites Hamalainen 1990_ | Table 3, p. 5, row 6; `ORC-2IHW5LASZW` | | | 1667.47 | polymorphic: bcc + L2 -> fcc + L2 | bcc: Pb 1.000e-5; L2: Pb 0.99671 | model | [1] Vaajamo 2011 | Table 3, p. 5, row 8; `ORC-2WWE24SPZ7` | | | 1184.81 | polymorphic: fcc + L2 -> bcc + L2 | fcc: Pb 0; L2: Pb 0.9996 | model | [1] Vaajamo 2011; _cites Hamalainen 1990_ | Table 3, p. 5, row 9; `ORC-VB5AGKNYRF` | | | 1184.8 | polymorphic: fcc + L2 -> bcc + L2 | fcc: Pb 1.000e-5; L2: Pb 0.99981 | model | [1] Vaajamo 2011 | Table 3, p. 5, row 11; `ORC-FCXVEEOE5C` | | | 1184.8 | polymorphic: fcc + L2 -> bcc + L2 | L2: Pb 0.9998 | model | [1] Vaajamo 2011; _cites Onderka 2004_ | Table 3, p. 5, row 10; `ORC-LGQ4AQVS3N` | | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. I. Vaajamo, P. Taskinen, A thermodynamic assessment of the iron–lead binary system, Thermochimica Acta 524, 56-61 (2011). [doi:10.1016/j.tca.2011.06.014](https://doi.org/10.1016/j.tca.2011.06.014) ## Please cite - R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735569 - R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735859 - R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735891 - R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23736065 Also cite the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0). Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes. ```bibtex @misc{orchid_literature_2026, author = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon}, title = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}}, version = {2026.10}, publisher = {Zenodo}, year = {2026}, doi = {10.5281/zenodo.23735569}, url = {https://doi.org/10.5281/zenodo.23735569}, note = {Version 1, machine-extracted} } @misc{orchid_phase_diagrams_2026, author = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon}, title = {{ORCHID-Diagrams: calculated binary phase diagrams}}, version = {2026.10}, publisher = {Zenodo}, year = {2026}, doi = {10.5281/zenodo.23735859}, url = {https://doi.org/10.5281/zenodo.23735859} } @misc{orchid_hulls_2026, author = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon}, title = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}}, version = {2026.10}, publisher = {Zenodo}, year = {2026}, doi = {10.5281/zenodo.23735891}, url = {https://doi.org/10.5281/zenodo.23735891} } @misc{orchid_data_2026, author = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon}, title = {{ORCHID data: umbrella record of the ORCHID datasets}}, version = {2026.10}, publisher = {Zenodo}, year = {2026}, doi = {10.5281/zenodo.23736065}, url = {https://doi.org/10.5281/zenodo.23736065}, note = {Version 1, machine-extracted} } ``` --- Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite ORCHID ([CITATION.cff](https://data.orchid-project.org/CITATION.cff)) and the original sources. Quotes are short excerpts kept so that each value can be checked; they remain under the publishers' copyright and are not relicensed. Source papers, page images and full text are not redistributed. Field reference: [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt). Found an error? The report link of a value (Markdown: its id, ORC-..., in the Location column) opens a pre-filled GitHub issue, https://github.com/orchid-calphad/orchid-data/issues/new?template=report-value-error.yml&record_id=\, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).