# B–Fe–Pr system

> B–Fe–Pr system: 61 accepted literature values (invariant reaction 31, phase transition 30) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/B-FE-PR.html · Markdown: https://data.orchid-project.org/systems/B-FE-PR.md

61 accepted literature values from 1 paper(s) (experimental 33, model 18, unspecified 10); 0 calculated phase diagram(s).

Data: [JSON](https://data.orchid-project.org/literature/systems/B-FE-PR.json) · [CSV](https://data.orchid-project.org/systems/B-FE-PR.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#B-FE-PR) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/B-FE-PR.html) · [Markdown](https://data.orchid-project.org/systems/B-FE-PR.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 33 |
| model | 18 |
| unspecified | 10 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 31 |
| phase transition | 30 |

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the B–Fe–Pr system (31)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1906 | other: liq. -> FeB + PrB6 | liq.: B 0.5051, Pr 3.000e-5 | model | [1] Chen 2020 | Table 5, p. 12, row 1; `ORC-I25ZTBLBIQ` |  |
| 1818 | quasi-peritectic: liq. + PrB6 -> FeB + PrB4 | liq.: B 0.3927, Pr 0.0016 | model | [1] Chen 2020 | Table 5, p. 12, row 2; `ORC-MHRCP56YYC` |  |
| 1782 | eutectic: liq. -> FeB + PrB6 + rhombo(B) | liq.: B 0.6331, Pr 0 | model | [1] Chen 2020 | Table 5, p. 12, row 3; `ORC-BPI6KHHTDF` |  |
| 1679 | quasi-peritectic: liq. + FeB -> PrB4 + Fe2B | liq.: B 0.3269, Pr 0.0036 | model | [1] Chen 2020 | Table 5, p. 12, row 4; `ORC-OMA36UMYXD` |  |
| 1527 | other: liq. + PrB4 -> Pr1.1Fe4B4 | liq.: B 0.2243, Pr 0.0745 | model | [1] Chen 2020 | Table 5, p. 12, row 5; `ORC-A5XSA744OT` |  |
| 1526 | quasi-peritectic: liq. + PrB4 -> Fe2B + Pr1.1Fe4B4 | liq.: B 0.228, Pr 0.061 | model | [1] Chen 2020 | Table 5, p. 12, row 6; `ORC-QM2MDP552W` |  |
| 1423 | quasi-peritectic: liq. + PrB4 -> Pr2B5 + Pr1.1Fe4B4 | liq.: B 0.147, Pr 0.3679 | model | [1] Chen 2020 | Table 5, p. 12, row 7; `ORC-UJ4UYB7I4E` |  |
| 1418 | liq. + fcc(Fe) -> Pr2Fe14B |  | unspecified | [1] Chen 2020; _cites Tian 1987_ | Table 5, p. 12, row 10; `ORC-QFOMMBHFAJ` |  |
| 1418 | other: liq. + fcc(Fe) -> Pr2Fe14B | liq.: B 0.0963, Pr 0.1798 | model | [1] Chen 2020 | Table 5, p. 12, row 8; `ORC-RC4I4O2SD4` |  |
| 1418 | liq. + fcc(Fe) -> Pr2Fe14B |  | experimental | [1] Chen 2020 | Table 5, p. 12, row 9; `ORC-VTKZ576NJ7` |  |
| 1398 | liq. + fcc(Fe) -> Pr2Fe14B |  | unspecified | [1] Chen 2020; _cites Neiva 1995_ [doi](https://doi.org/10.1016/0925-8388%2894%2901356-x) | Table 5, p. 12, row 11; `ORC-JMFUODK7GG` |  |
| 1373 | liq. -> Pr2Fe14B + Pr1.1Fe4B4 |  | unspecified | [1] Chen 2020; _cites Tian 1987_ | Table 5, p. 12, row 14; `ORC-CPHQ5P7LIO` |  |
| 1369 | liq. -> Pr2Fe14B + Pr1.1Fe4B4 |  | experimental | [1] Chen 2020 | Table 5, p. 12, row 13; `ORC-APQCHNYVIU` |  |
| 1368 | other: liq. -> Pr2Fe14B + Pr1.1Fe4B4 | liq.: B 0.1524, Pr 0.1139 | model | [1] Chen 2020 | Table 5, p. 12, row 12; `ORC-VQKNY6GXYD` |  |
| 1366 | quasi-peritectic: liq. + Fe2B -> Pr1.1Fe4B4 + fcc(Fe) | liq.: B 0.1579, Pr 0.0703 | model | [1] Chen 2020 | Table 5, p. 12, row 16; `ORC-NFDLQZY32V` |  |
| 1363 | liq. -> Pr2Fe14B + Pr1.1Fe4B4 |  | unspecified | [1] Chen 2020; _cites Neiva 1995_ [doi](https://doi.org/10.1016/0925-8388%2894%2901356-x) | Table 5, p. 12, row 15; `ORC-WGZTCVTKPX` |  |
| 1362 | eutectic: liq. -> fcc(Fe) + Pr2Fe14B + Pr1.1Fe4B4 | liq.: B 0.1543, Pr 0.0815 | model | [1] Chen 2020 | Table 5, p. 12, row 17; `ORC-AB6JA2JNBQ` |  |
| 1358 | liq. -> fcc(Fe) + Pr2Fe14B + Pr1.1Fe4B4 |  | experimental | [1] Chen 2020 | Table 5, p. 12, row 18; `ORC-QAEBBX5WQN` |  |
| 1358 | liq. + fcc(Fe) -> Pr2Fe14B + Pr2Fe17 |  | unspecified | [1] Chen 2020; _cites Tian 1987_ | Table 5, p. 12, row 20; `ORC-URD5MD5ZCU` |  |
| 1355 | liq. + fcc(Fe) -> Pr2Fe14B + Pr2Fe17 |  | unspecified | [1] Chen 2020; _cites Neiva 1995_ [doi](https://doi.org/10.1016/0925-8388%2894%2901356-x) | Table 5, p. 12, row 21; `ORC-KJQGIO7AOS` |  |
| 1355 | quasi-peritectic: liq. + fcc(Fe) -> Pr2Fe14B + Pr2Fe17 | liq.: B 0.0326, Pr 0.4014 | model | [1] Chen 2020 | Table 5, p. 12, row 19; `ORC-MU5GARFHG2` |  |
| 1240 | peritectic: liq. + Pr1.1Fe4B4 + Pr2B5 -> Pr5Fe2B6 | liq.: B 0.0647, Pr 0.6533 | model | [1] Chen 2020 | Table 5, p. 12, row 22; `ORC-S6G22DA57Z` |  |
| 1068 | other: bcc(Pr) + Pr2B5 -> liq. + dhcp(Pr) | liq.: B 0.0095, Pr 0.9184 | model | [1] Chen 2020 | Table 5, p. 12, row 23; `ORC-KWGNMODTBC` |  |
| 1063 | quasi-peritectic: liq. + Pr2B5 -> Pr5Fe2B6 + dhcp(Pr) | liq.: B 0.0095, Pr 0.9145 | model | [1] Chen 2020 | Table 5, p. 12, row 24; `ORC-OFKOR2LAAV` |  |
| 1013 | liq. + Pr5Fe2B6 -> Pr1.1Fe4B4 + dhcp(Pr) |  | unspecified | [1] Chen 2020; _cites Neiva 1995_ [doi](https://doi.org/10.1016/0925-8388%2894%2901356-x) | Table 5, p. 12, row 26; `ORC-UAHD4OOOP5` |  |
| 967 | quasi-peritectic: liq. + Pr5Fe2B6 -> Pr1.1Fe4B4 + dhcp(Pr) | liq.: B 0.0066, Pr 0.8231 | model | [1] Chen 2020 | Table 5, p. 12, row 25; `ORC-DOFRFLIDAO` |  |
| 963 | liq. + Pr1.1Fe4B4 -> Pr2Fe14B + dhcp(Pr) |  | unspecified | [1] Chen 2020; _cites Neiva 1995_ [doi](https://doi.org/10.1016/0925-8388%2894%2901356-x) | Table 5, p. 12, row 28; `ORC-QOAW6VPOUU` |  |
| 961 | quasi-peritectic: liq. + Pr1.1Fe4B4 -> Pr2Fe14B + dhcp(Pr) | liq.: B 0.0063, Pr 0.8179 | model | [1] Chen 2020 | Table 5, p. 12, row 27; `ORC-R533VYXEGV` |  |
| 949 | liq. -> Pr2Fe14B + dhcp(Pr) + Pr2Fe17 |  | unspecified | [1] Chen 2020; _cites Tian 1987_ | Table 5, p. 12, row 30; `ORC-BAUT35DK5K` |  |
| 943 | liq. -> Pr2Fe14B + dhcp(Pr) + Pr2Fe17 |  | unspecified | [1] Chen 2020; _cites Neiva 1995_ [doi](https://doi.org/10.1016/0925-8388%2894%2901356-x) | Table 5, p. 12, row 31; `ORC-SO7ZIAOXUB` |  |
| 939 | eutectic: liq. -> Pr2Fe14B + dhcp(Pr) + Pr2Fe17 | liq.: B 3.000e-4, Pr 0.8018 | model | [1] Chen 2020 | Table 5, p. 12, row 29; `ORC-52GJGJ7KBX` |  |

## Other properties

### Phase transition (30)

Table: Phase transition, B–Fe–Pr system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 940 K | 940 | liq. → Pr2Fe14B + Pr2Fe17 + dhcp(Pr); _alloy: B 0.03, Fe 0.73, Pr 0.24_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 19; `ORC-HY55ENY7M5` |  |
| Phase transition | 950 K | 950 | liq. + Pr1.1Fe4B4 → Pr2Fe14B + dhcp(Pr); _alloy: B 0.07, Fe 0.787, Pr 0.143_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 33; `ORC-NJOD5TIFAT` |  |
| Phase transition | 952 K | 952 | liq. + Pr1.1Fe4B4 → Pr2Fe14B + dhcp(Pr); _alloy: B 0.081, Fe 0.766, Pr 0.153_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 29; `ORC-WHM77T77LS` |  |
| Phase transition | 959 K | 959 | liq. + Pr1.1Fe4B4 → Pr2Fe14B + dhcp(Pr); _alloy: B 0.107, Fe 0.478, Pr 0.415_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 25; `ORC-T2KW6U6NNG` |  |
| Phase transition | 960 K | 960 | liq. + Pr1.1Fe4B4 → Pr2Fe14B + dhcp(Pr); _alloy: B 0.07, Fe 0.586, Pr 0.344_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 22; `ORC-HVUQO2VDQO` |  |
| Phase transition | 1290 K | 1290 | liq. → Pr1.1Fe4B4 + Pr2Fe14B; _alloy: B 0.107, Fe 0.478, Pr 0.415_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 24; `ORC-YXGDGQO5VU` |  |
| Phase transition | 1301 K | 1301 | liq. → Pr2Fe14B + Pr1.1Fe4B4; _alloy: B 0.07, Fe 0.586, Pr 0.344_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 21; `ORC-M7J5RRTB4W` |  |
| Phase transition | 1338 K | 1338 | liq. → Pr1.1Fe4B4; _alloy: B 0.107, Fe 0.478, Pr 0.415_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 23; `ORC-F5DDAEH27E` |  |
| Phase transition | 1357 K | 1357 | liq. → fcc(Fe) + Pr2Fe14B + Pr1.1Fe4B4; _alloy: B 0.2, Fe 0.754, Pr 0.046_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 15; `ORC-VQ24SNQJOR` |  |
| Phase transition | 1359 K | 1359 | liq. → fcc(Fe) + Pr2Fe14B + Pr1.1Fe4B4; _alloy: B 0.103, Fe 0.8, Pr 0.097_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 5; `ORC-OW375LTREI` |  |
| Phase transition | 1365 K | 1365 | liq. → Pr2Fe14B; _alloy: B 0.07, Fe 0.586, Pr 0.344_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 20; `ORC-FVZCFLCWTN` |  |
| Phase transition | 1367 K | 1367 | liq. → Pr2Fe14B + Pr1.1Fe4B4; _alloy: B 0.2, Fe 0.657, Pr 0.143_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 10; `ORC-4BGRY6K5AK` |  |
| Phase transition | 1367 K | 1367 | liq. → Pr2Fe14B + Pr1.1Fe4B4; _alloy: B 0.121, Fe 0.747, Pr 0.132_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 7; `ORC-HNOD57TCJ3` |  |
| Phase transition | 1368 K | 1368 | liq. + fcc(Fe) → Pr2Fe14B + Pr2Fe17; _alloy: B 0.03, Fe 0.73, Pr 0.24_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 18; `ORC-L3MP76ULRI` |  |
| Phase transition | 1368 K | 1368 | liq. → Pr2Fe14B + Pr1.1Fe4B4; _alloy: B 0.081, Fe 0.766, Pr 0.153_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 28; `ORC-FZ3W6X6ZTL` |  |
| Phase transition | 1369 K | 1369 | liq. + Fe2B → fcc(Fe) + Pr1.1Fe4B4; _alloy: B 0.2, Fe 0.754, Pr 0.046_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 14; `ORC-JXCWNSVK63` |  |
| Phase transition | 1369 K | 1369 | liq. → Pr2Fe14B + Pr1.1Fe4B4; _alloy: B 0.07, Fe 0.787, Pr 0.143_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 32; `ORC-N7BULWK34L` |  |
| Phase transition | 1387 K | 1387 | liq. + fcc(Fe) → Pr2Fe14B; _alloy: B 0.03, Fe 0.73, Pr 0.24_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 17; `ORC-5GIDU7SV3W` |  |
| Phase transition | 1400 K | 1400 | liq. + fcc(Fe) → Pr2Fe14B; _alloy: B 0.103, Fe 0.8, Pr 0.097_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 3; `ORC-B5CT5PMUD3` |  |
| Phase transition | 1412 K | 1412 | liq. → Pr2Fe14B; _alloy: B 0.121, Fe 0.747, Pr 0.132_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 6; `ORC-GAESRJWMFR` |  |
| Phase transition | 1414 K | 1414 | liq. + fcc(Fe) → Pr2Fe14B; _alloy: B 0.07, Fe 0.787, Pr 0.143_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 31; `ORC-QPPHYMGWNT` |  |
| Phase transition | 1417 K | 1417 | liq. → Fe2B + fcc(Fe); _alloy: B 0.2, Fe 0.754, Pr 0.046_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 13; `ORC-LRXVGQGCZB` |  |
| Phase transition | 1418 K | 1418 | liq. + fcc(Fe) → Pr2Fe14B; _alloy: B 0.081, Fe 0.766, Pr 0.153_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 27; `ORC-2CVH2N66HI` |  |
| Phase transition | 1438 K | 1438 | —; _alloy: B 0.103, Fe 0.8, Pr 0.097_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 2; `ORC-36NQILRG42` |  |
| Phase transition | 1473 K | 1473 | liq. → Fe2B; _alloy: B 0.2, Fe 0.754, Pr 0.046_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 12; `ORC-6YSNT4BNC2` |  |
| Phase transition | 1490 K | 1490 | liq. → fcc(Fe); _alloy: B 0.103, Fe 0.8, Pr 0.097_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 1; `ORC-R5QTL6DGLO` |  |
| Phase transition | 1491 K | 1491 | liq. → fcc(Fe); _alloy: B 0.081, Fe 0.766, Pr 0.153_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 26; `ORC-E5MSLST6WQ` |  |
| Phase transition | 1510 K | 1510 | liq. → fcc(Fe); _alloy: B 0.07, Fe 0.787, Pr 0.143_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 30; `ORC-NM3IYRWC52` |  |
| Phase transition | 1518 K | 1518 | liq. → fcc(Fe); _alloy: B 0.03, Fe 0.73, Pr 0.24_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 16; `ORC-AJRIGFFIJ4` |  |
| Phase transition | 1544 K | 1544 | liq. → Pr1.1Fe4B4; _alloy: B 0.2, Fe 0.657, Pr 0.143_ | experimental | [1] Chen 2020 | Table 2, p. 3, row 9; `ORC-KAASZ7UZ6T` |  |

## Sources

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

1. Taili Chen, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental investigation and thermodynamic description of the Pr–Fe–B system, Journal of Magnetism and Magnetic Materials 497, 165983 (2020). [doi:10.1016/j.jmmm.2019.165983](https://doi.org/10.1016/j.jmmm.2019.165983)

## 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 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_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/).