# C–Pu system

> C–Pu system: 59 accepted literature values (heat capacity / entropy / enthalpy 36, formation 23) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/C-PU.html · Markdown: https://data.orchid-project.org/systems/C-PU.md

59 accepted literature values from 1 paper(s) (experimental 29, model 18, unspecified 12); 0 calculated phase diagram(s). 12 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/C-PU.json) · [CSV](https://data.orchid-project.org/systems/C-PU.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#C-PU) · [phases (14)](https://data.orchid-project.org/phases/pages/C-PU.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/C-PU.html) · [Markdown](https://data.orchid-project.org/systems/C-PU.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 29 |
| model | 18 |
| unspecified | 12 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| formation | 23 |
| heat capacity / entropy / enthalpy | 36 |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/C/C-PU.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/C/C-PU.json) · [CALPHAD hull PuC-08Fis](https://data.orchid-project.org/hulls/calphad-sgte/C/C-PU--PuC-08Fis.json)

## Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from [dft_parity.json](https://data.orchid-project.org/literature/dft_parity.json).

Table: Enthalpies of formation, C–Pu system (23)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| C0.81Pu |  | -21.76 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Lorenzelli 1971_ [doi](https://doi.org/10.1016/0022-1902%2871%2980650-4) | Table 1, p. 3, row 6; `ORC-VJDS7XHOGS.7531bf` |  |
| C0.878Pu |  | -47.74 kJ/mol (basis unstated) ± 3 | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Johnson 1970_ [doi](https://doi.org/10.1016/0021-9614%2870%2990036-4) | Table 1, p. 3, row 4; `ORC-MMZIEYVT3C.b78cfa` |  |
| C0.87Pu |  | -43.51 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Fischer 2008; _cites Akhachinskii 1970_ | Table 1, p. 3, row 8; `ORC-DNNTXGDC7S.507b7a` |  |
| C0.88Pu |  | -47.7 kJ/mol (basis unstated) | 298.15 | unspecified |  |  | [1] Fischer 2008; _cites Barin 1995_ | Table 1, p. 3, row 12; `ORC-PSFOGYHOVG.2aa9c4` |  |
| C0.91Pu |  | -45.6 kJ/mol (basis unstated) ± 4.2 | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Campbell 1970_ | Table 1, p. 3, row 7; `ORC-5L7N53FQQU.b3febf` |  |
| C0.9Pu |  | -43.93 kJ/mol (basis unstated) ± 8 | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Marcon 1970_ [doi](https://doi.org/10.1016/0022-1902%2870%2980305-0) | Table 1, p. 3, row 9; `ORC-4IHNF2XLO3.871a9f` |  |
| C1Pu |  | -53.67 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Fischer 2008 | Table 1, p. 3, row 15; `ORC-MOYSFEYTAM.7484b1` |  |
| C3Pu2 |  | -102.09 kJ/mol (basis unstated) ± 11 | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Lorenzelli 1971_ [doi](https://doi.org/10.1016/0022-1902%2871%2980650-4) | Table 2, p. 3, row 5; `ORC-XP6N4C4OBN.bc077a` |  |
| C3Pu2 |  | -93.3 kJ/mol (basis unstated) ± 3.3 | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Besmann 1983_ [doi](https://doi.org/10.1111/j.1151-2916.1983.tb10562.x) | Table 2, p. 3, row 1; `ORC-HMR7YCY3RI.3a4e2e` |  |
| C3Pu2 |  | -88 kJ/mol (basis unstated) ± 8 | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Lapage 1969_ | Table 2, p. 3, row 9; `ORC-L5WYOGWROC.dd9a78` |  |
| C3Pu2 |  | -84.73 kJ/mol (basis unstated) | 298.15 | unspecified |  |  | [1] Fischer 2008; _cites Barin 1995_ | Table 2, p. 3, row 13; `ORC-7MPUQBSPFQ.d625bf` |  |
| C3Pu2 |  | -82.84 kJ/mol (basis unstated) ± 4 | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Johnson 2008_ | Table 2, p. 3, row 3; `ORC-IYUP4BL2VG.1cce48` |  |
| C3Pu2 |  | -77.06 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Fischer 2008 | Table 2, p. 3, row 14; `ORC-4ZQNQHMDP4.2f36c8` |  |
| C3Pu2 |  | -74.7 kJ/mol (basis unstated) ± 8.35 | 298.15 | unspecified |  |  | [1] Fischer 2008; _cites Lemire 2001_ | Table 2, p. 3, row 12; `ORC-V3YQ4FVLOK.29048e` |  |
| C3Pu2 |  | -73.22 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Harris 1967_ | Table 2, p. 3, row 11; `ORC-RWZVX5F6SU.457e1f` |  |
| C3Pu2 |  | -67.53 kJ/mol (basis unstated) ± 4.6 | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Battles 1970_ | Table 2, p. 3, row 6; `ORC-FAE7EX3PZP.c991ff` |  |
| C3Pu2 |  | -66.53 kJ/mol (basis unstated) ± 8 | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Marcon 1970_ [doi](https://doi.org/10.1016/0022-1902%2870%2980305-0) | Table 2, p. 3, row 7; `ORC-F3LTDTT2XZ.7d7d5d` |  |
| C3Pu2 |  | -55.23 kJ/mol (basis unstated) ± 10.5 | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Campbell 1970_ | Table 2, p. 3, row 8; `ORC-5ANWZ6QAXS.6aba0e` |  |
| C3Pu2 |  | -51.46 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Olson 1967_ | Table 2, p. 3, row 10; `ORC-4H644QZFXO.d94f20` |  |
| C₀.₈₄Pu |  | -45.2 kJ/mol (basis unstated) ± 8 | 298.15 | unspecified |  |  | [1] Fischer 2008; _cites Lemire 2001_ | Table 1, p. 3, row 11; `ORC-YP4CYJO7NY.6c0edd` |  |
| C₀.₈₄Pu |  | -45.03 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Fischer 2008 | Table 1, p. 3, row 13; `ORC-SRRGTSNGMO.f0f90c` |  |
| C₀.₉Pu |  | -48.68 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Fischer 2008 | Table 1, p. 3, row 14; `ORC-UIGWAPEFNG.0b36e2` |  |
| C₀.₉₁Pu |  | -50.2 kJ/mol (basis unstated) ± 8 | 298.15 | experimental |  |  | [1] Fischer 2008; _cites Lorenzelli 1971_ [doi](https://doi.org/10.1016/0022-1902%2871%2980650-4) | Table 1, p. 3, row 5; `ORC-43Z4U4CNVR.117129` |  |

## Other properties

### Heat capacity / entropy / enthalpy (36)

Table: Heat capacity / entropy / enthalpy, C–Pu system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Entropy; _printed: S°298.15_ | 74.8 J/mol (basis unstated)/K ± 2.1 | 298.15 | C0.84Pu; _alloy: Pu 0.543478_ | unspecified | [1] Fischer 2008; _cites Lemire 2001_ | Table 1, p. 3, row 11; `ORC-YP4CYJO7NY.348385` |  |
| Entropy; _printed: ΔS°f,298.15_ | 14.64 J/K mol ± 12.55 | 298.15 | C0.878Pu; _alloy: Pu 0.532481_ | experimental | [1] Fischer 2008; _cites Johnson 1970_ [doi](https://doi.org/10.1016/0021-9614%2870%2990036-4) | Table 1, p. 3, row 4; `ORC-MMZIEYVT3C.a5b41d` |  |
| Entropy; _printed: ΔS°f,298.15_ | 12.13 J/K mol ± 2 | 298.15 | C0.91Pu; _alloy: Pu 0.52356_ | experimental | [1] Fischer 2008; _cites Campbell 1970_ | Table 1, p. 3, row 7; `ORC-5L7N53FQQU.3562f1` |  |
| Entropy; _printed: S°298.15_ | 74.21 J/mol (basis unstated)/K | 298.15 | C0.9Pu; _alloy: Pu 0.526316_ | model | [1] Fischer 2008 | Table 1, p. 3, row 14; `ORC-UIGWAPEFNG.54be27` |  |
| Entropy; _printed: ΔS°f,298.15_ | 14.6 J/K mol | 298.15 | C0.9Pu; _alloy: Pu 0.526316_ | model | [1] Fischer 2008 | Table 1, p. 3, row 14; `ORC-UIGWAPEFNG.a7f260` |  |
| Entropy; _printed: ΔS°f,298.15_ | 9.76 J/K mol | 298.15 | C3Pu2; _alloy: Pu 0.4_ | model | [1] Fischer 2008 | Table 2, p. 3, row 14; `ORC-4ZQNQHMDP4.9eadff` |  |
| Entropy; _printed: S°298.15_ | 72.83 J/mol (basis unstated)/K | 298.15 | C3Pu2; _alloy: Pu 0.4_ | model | [1] Fischer 2008 | Table 2, p. 3, row 14; `ORC-4ZQNQHMDP4.ecbebe` |  |
| Entropy; _printed: ΔS°f,298.15_ | 23.01 J/K mol ± 4.2 | 298.15 | C3Pu2; _alloy: Pu 0.4_ | experimental | [1] Fischer 2008; _cites Campbell 1970_ | Table 2, p. 3, row 8; `ORC-5ANWZ6QAXS.89e4a7` |  |
| Entropy; _printed: S°298.15_ | 75 J/mol (basis unstated)/K ± 2.2 | 298.15 | C3Pu2; _alloy: Pu 0.4_ | unspecified | [1] Fischer 2008; _cites Barin 1995_ | Table 2, p. 3, row 13; `ORC-7MPUQBSPFQ.3e180a` |  |
| Entropy; _printed: ΔS°f,298.15_ | 21.3 J/K mol ± 2.5 | 298.15 | C3Pu2; _alloy: Pu 0.4_ | experimental | [1] Fischer 2008; _cites Battles 1970_ | Table 2, p. 3, row 6; `ORC-FAE7EX3PZP.0c2724` |  |
| Entropy; _printed: S°298.15_ | 76.17 J/mol (basis unstated)/K | 298.15 | C3Pu2; _alloy: Pu 0.4_ | experimental | [1] Fischer 2008; _cites Besmann 1983_ [doi](https://doi.org/10.1111/j.1151-2916.1983.tb10562.x) | Table 2, p. 3, row 1; `ORC-HMR7YCY3RI.a85582` |  |
| Entropy; _printed: ΔS°f,298.15_ | -0.84 J/K mol ± 4.2 | 298.15 | C3Pu2; _alloy: Pu 0.4_ | experimental | [1] Fischer 2008; _cites Johnson 2008_ | Table 2, p. 3, row 3; `ORC-IYUP4BL2VG.7b09e9` |  |
| Entropy; _printed: S°298.15_ | 75 J/mol (basis unstated)/K ± 2.2 | 298.15 | C3Pu2; _alloy: Pu 0.4_ | experimental | [1] Fischer 2008; _cites Haines 1980_ [doi](https://doi.org/10.1016/0022-3115%2880%2990281-0) | Table 2, p. 3, row 2; `ORC-QYYNBSJQKI.93eb72` |  |
| Entropy; _printed: S°298.15_ | 64 J/mol (basis unstated)/K ± 4 | 298.15 | C3Pu2; _alloy: Pu 0.4_ | experimental | [1] Fischer 2008; _cites Danan 1972_ | Table 2, p. 3, row 4; `ORC-SO3U3RZ652.8bc8ff` |  |
| Entropy; _printed: S°298.15_ | 75 J/mol (basis unstated)/K ± 1.45 | 298.15 | C3Pu2; _alloy: Pu 0.4_ | unspecified | [1] Fischer 2008; _cites Lemire 2001_ | Table 2, p. 3, row 12; `ORC-V3YQ4FVLOK.1896de` |  |
| Entropy; _printed: S°298.15_ | 70.46 J/mol (basis unstated)/K | 298.15 | C₀.₈Pu; _alloy: Pu 0.555556_ | experimental | [1] Fischer 2008; _cites Sandenaw 1975_ [doi](https://doi.org/10.1016/0022-3115%2875%2990254-8) | Table 1, p. 3, row 3; `ORC-2TJONUSJBC.80f06f` |  |
| Entropy; _printed: S°298.15_ | 69.59 J/mol (basis unstated)/K ± 2 | 298.15 | C₀.₈Pu; _alloy: Pu 0.555556_ | experimental | [1] Fischer 2008; _cites Haines 1980_ [doi](https://doi.org/10.1016/0022-3115%2880%2990281-0) | Table 1, p. 3, row 2; `ORC-ICTO4YCG3I.755cf3` |  |
| Entropy; _printed: ΔS°f,298.15_ | 15.05 J/K mol | 298.15 | C₀.₈₄Pu; _alloy: Pu 0.543478_ | model | [1] Fischer 2008 | Table 1, p. 3, row 13; `ORC-SRRGTSNGMO.719427` |  |
| Entropy; _printed: S°298.15_ | 74.29 J/mol (basis unstated)/K | 298.15 | C₀.₈₄Pu; _alloy: Pu 0.543478_ | model | [1] Fischer 2008 | Table 1, p. 3, row 13; `ORC-SRRGTSNGMO.cd7a80` |  |
| Entropy; _printed: ΔS°f,298.15_ | 12.09 J/K mol | 298.15 | C₀.₈₇Pu; _alloy: Pu 0.534759_ | model | [1] Fischer 2008; _cites Akhachinskii 1970_ | Table 1, p. 3, row 8; `ORC-DNNTXGDC7S.3af611` |  |
| Entropy; _printed: S°298.15_ | 72.72 J/mol (basis unstated)/K | 298.15 | C₀.₈₈Pu; _alloy: Pu 0.531915_ | unspecified | [1] Fischer 2008; _cites Barin 1995_ | Table 1, p. 3, row 12; `ORC-PSFOGYHOVG.54d97e` |  |
| Entropy; _printed: ΔS°f,298.15_ | 13.67 J/K mol | 298.15 | C₁Pu; _alloy: Pu 0.5_ | model | [1] Fischer 2008 | Table 1, p. 3, row 15; `ORC-MOYSFEYTAM.1db113` |  |
| Entropy; _printed: S°298.15_ | 73.87 J/mol (basis unstated)/K | 298.15 | C₁Pu; _alloy: Pu 0.5_ | model | [1] Fischer 2008 | Table 1, p. 3, row 15; `ORC-MOYSFEYTAM.95b49f` |  |
| Heat capacity; _printed: CP298.15_ | 44.16 J/mol (basis unstated)/K | 298.15 | C0.84Pu; _alloy: Pu 0.543478_ | model | [1] Fischer 2008 | Table 1, p. 3, row 13; `ORC-SRRGTSNGMO.86c428` |  |
| Heat capacity; _printed: CP298.15_ | 56 J/mol (basis unstated)/K | 298.15 | C3Pu2; _alloy: Pu 0.4_ | model | [1] Fischer 2008 | Table 2, p. 3, row 14; `ORC-4ZQNQHMDP4.0faa3a` |  |
| Heat capacity; _printed: CP298.15_ | 57 J/mol (basis unstated)/K | 298.15 | C3Pu2; _alloy: Pu 0.4_ | unspecified | [1] Fischer 2008; _cites Barin 1995_ | Table 2, p. 3, row 13; `ORC-7MPUQBSPFQ.8265e7` |  |
| Heat capacity; _printed: CP298.15_ | 57 J/mol (basis unstated)/K | 298.15 | C3Pu2; _alloy: Pu 0.4_ | experimental | [1] Fischer 2008; _cites Haines 1980_ [doi](https://doi.org/10.1016/0022-3115%2880%2990281-0) | Table 2, p. 3, row 2; `ORC-QYYNBSJQKI.4eee7a` |  |
| Heat capacity; _printed: CP298.15_ | 57 J/mol (basis unstated)/K ± 0.2 | 298.15 | C3Pu2; _alloy: Pu 0.4_ | unspecified | [1] Fischer 2008; _cites Lemire 2001_ | Table 2, p. 3, row 12; `ORC-V3YQ4FVLOK.df6d95` |  |
| Heat capacity; _printed: CP298.15_ | 46.19 J/mol (basis unstated)/K | 298.15 | C₀.₈Pu; _alloy: Pu 0.555556_ | experimental | [1] Fischer 2008; _cites Sandenaw 1975_ [doi](https://doi.org/10.1016/0022-3115%2875%2990254-8) | Table 1, p. 3, row 3; `ORC-2TJONUSJBC.81481c` |  |
| Heat capacity; _printed: CP298.15_ | 46.06 J/mol (basis unstated)/K | 298.15 | C₀.₈Pu; _alloy: Pu 0.555556_ | experimental | [1] Fischer 2008; _cites Haines 1980_ [doi](https://doi.org/10.1016/0022-3115%2880%2990281-0) | Table 1, p. 3, row 2; `ORC-ICTO4YCG3I.be37c6` |  |
| Heat capacity; _printed: CP298.15_ | 46.06 J/mol (basis unstated)/K | 298.15 | C₀.₈₂Pu; _alloy: Pu 0.549451_ | experimental | [1] Fischer 2008; _cites Oetting 1980_ [doi](https://doi.org/10.1016/0022-3115%2880%2990282-2) | Table 1, p. 3, row 1; `ORC-24U66SUY3P.8ca50f` |  |
| Heat capacity; _printed: CP298.15_ | 47.1 J/mol (basis unstated)/K ± 1 | 298.15 | C₀.₈₄Pu; _alloy: Pu 0.543478_ | unspecified | [1] Fischer 2008; _cites Lemire 2001_ | Table 1, p. 3, row 11; `ORC-YP4CYJO7NY.361b4b` |  |
| Heat capacity; _printed: CP298.15_ | 40.94 J/mol (basis unstated)/K | 298.15 | C₀.₈₇Pu; _alloy: Pu 0.534759_ | experimental | [1] Fischer 2008; _cites Kruger 1964_ | Table 1, p. 3, row 10; `ORC-4ZUW262ENE.4af561` |  |
| Heat capacity; _printed: CP298.15_ | 47.7 J/mol (basis unstated)/K | 298.15 | C₀.₈₈Pu; _alloy: Pu 0.531915_ | unspecified | [1] Fischer 2008; _cites Barin 1995_ | Table 1, p. 3, row 12; `ORC-PSFOGYHOVG.7609d7` |  |
| Heat capacity; _printed: CP298.15_ | 45.11 J/mol (basis unstated)/K | 298.15 | C₀.₉Pu; _alloy: Pu 0.526316_ | model | [1] Fischer 2008 | Table 1, p. 3, row 14; `ORC-UIGWAPEFNG.049b5a` |  |
| Heat capacity; _printed: CP298.15_ | 46.69 J/mol (basis unstated)/K | 298.15 | C₁Pu; _alloy: Pu 0.5_ | model | [1] Fischer 2008 | Table 1, p. 3, row 15; `ORC-MOYSFEYTAM.7f6a84` |  |

## Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

1. Evelyne Fischer, Thermodynamic modeling of the C–Pu system, Calphad 32, 371-377 (2008). [doi:10.1016/j.calphad.2007.12.004](https://doi.org/10.1016/j.calphad.2007.12.004)

## 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-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); 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); 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.

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_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=\<id>, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).