# Al–Ni–Pr system

> Al–Ni–Pr system: 66 accepted literature values (invariant reaction 37, formation 29) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

66 accepted literature values from 1 paper(s) (experimental 1, model 53, DFT 12); 0 calculated phase diagram(s). 3 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/AL-NI-PR.json) · [CSV](https://data.orchid-project.org/systems/AL-NI-PR.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AL-NI-PR) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AL-NI-PR.html) · [Markdown](https://data.orchid-project.org/systems/AL-NI-PR.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 1 |
| model | 53 |
| DFT | 12 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 37 |
| formation | 29 |

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Al–Ni–Pr system (37)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1644.15 | quasi-peritectic: Liq + τ7 -> τ4 + τ5 |  | model | [1] Liao 2019 | Table 5, p. 10, row 1; `ORC-NZ4NZJX34C` |  |
| 1613.15 | eutectic: Liq -> τ2 + τ5 + τ4 |  | model | [1] Liao 2019 | Table 5, p. 10, row 2; `ORC-ISI57EBPDZ` |  |
| 1545.15 | eutectic: Liq -> τ2 + NiAl + τ4 |  | model | [1] Liao 2019 | Table 5, p. 10, row 3; `ORC-RZR6IQ4FRN` |  |
| 1530.15 | eutectic: Liq -> τ6 + Ni5Pr + fcc |  | model | [1] Liao 2019 | Table 5, p. 10, row 4; `ORC-V26AXFOR2W` |  |
| 1511.15 | eutectic: Liq -> NiAl + τ4 + τ7 |  | model | [1] Liao 2019 | Table 5, p. 10, row 5; `ORC-4MZINYLB5Y` |  |
| 1491.15 | quasi-peritectic: Liq + τ2 -> τ3 + τ5 |  | model | [1] Liao 2019 | Table 5, p. 10, row 6; `ORC-MJZ45NNCSP` |  |
| 1490.15 | quasi-peritectic: Liq + Ni5Pr -> τ6 + Ni17Pr2 |  | model | [1] Liao 2019 | Table 5, p. 10, row 7; `ORC-BMABMXY5UZ` |  |
| 1454.15 | peritectic: Liq + τ6 + fcc -> Ni5Pr |  | model | [1] Liao 2019 | Table 5, p. 10, row 8; `ORC-7DFWYNAMSE` |  |
| 1419.15 | eutectic: Liq -> τ7 + τ6 + τ8 |  | model | [1] Liao 2019 | Table 5, p. 10, row 9; `ORC-RXBQE3JWLD` |  |
| 1414.15 | eutectic: Liq -> τ5 + PrAl2 + τ3 |  | model | [1] Liao 2019 | Table 5, p. 10, row 10; `ORC-KIR4Z5FCPI` |  |
| 1403.15 | quasi-peritectic: Liq + fcc -> Ni5Pr + Ni3Al |  | model | [1] Liao 2019 | Table 5, p. 10, row 11; `ORC-LY5WHT3UPU` |  |
| 1396.15 | eutectic: Liq -> PrAl2 + τ3 + β\_Pr3Al11 |  | model | [1] Liao 2019 | Table 5, p. 10, row 12; `ORC-3AVAVZFKX7` |  |
| 1375.15 | quasi-peritectic: Liq + NiAl -> Al3Ni2 + τ2 |  | model | [1] Liao 2019 | Table 5, p. 10, row 13; `ORC-5TDM75OSZ6` |  |
| 1362.15 | eutectic: Liq -> Ni5Pr + Ni3Al + NiAl |  | model | [1] Liao 2019 | Table 5, p. 10, row 14; `ORC-PXPGVPN2DT` |  |
| 1359.15 | eutectic: Liq -> Ni5Pr + τ7 + τ6 |  | model | [1] Liao 2019 | Table 5, p. 10, row 15; `ORC-KCJW3JNRTR` |  |
| 1338.15 | eutectic: Liq -> Ni5Pr + NiAl + τ7 |  | model | [1] Liao 2019 | Table 5, p. 10, row 16; `ORC-AAFCX4VUD4` |  |
| 1268.15 | quasi-peritectic: Liq + Ni17Pr2 -> τ6 + Ni3Pr |  | model | [1] Liao 2019 | Table 5, p. 10, row 17; `ORC-264TCNCGTR` |  |
| 1240.15 | peritectic: Liq + τ6 + Ni3Pr -> Ni2Pr |  | model | [1] Liao 2019 | Table 5, p. 10, row 18; `ORC-WRPZF4SPFS` |  |
| 1238.15 | quasi-peritectic: Liq + β\_Pr3Al11 -> τ3 + α\_Pr3Al11 |  | model | [1] Liao 2019 | Table 5, p. 10, row 19; `ORC-U7KOI2WRZY` |  |
| 1221.15 | quasi-peritectic: Liq + τ2 -> τ3 + τ1 |  | model | [1] Liao 2019 | Table 5, p. 10, row 20; `ORC-JM5FKK43YA` |  |
| 1158.15 | quasi-peritectic: Liq + τ2 -> τ1 + Al3Ni2 |  | model | [1] Liao 2019 | Table 5, p. 10, row 21; `ORC-T5TRICLVBR` |  |
| 1110.15 | quasi-peritectic: Liq + Al3Ni2 -> Al3Ni + τ1 |  | model | [1] Liao 2019 | Table 5, p. 10, row 22; `ORC-LRFJLSGFMJ` |  |
| 1100.15 | quasi-peritectic: Liq + τ3 -> α\_Pr3Al11 + τ1 |  | model | [1] Liao 2019 | Table 5, p. 10, row 23; `ORC-A5TX4LTOXR` |  |
| 1074.15 | quasi-peritectic: Liq + τ5 -> τ7 + PrAl2 |  | model | [1] Liao 2019 | Table 5, p. 10, row 24; `ORC-6CFDZB2QW5` |  |
| 1073.15 | quasi-peritectic: Liq + τ6 -> τ8 + Ni2Pr |  | model | [1] Liao 2019 | Table 5, p. 10, row 25; `ORC-GK46FY3M4Q` |  |
| 934.15 | quasi-peritectic: Liq + Ni2Pr -> τ8 + NiPr |  | model | [1] Liao 2019 | Table 5, p. 10, row 26; `ORC-C3WSKJKD37` |  |
| 909.15 | quasi-peritectic: Liq + τ1 -> α\_Pr3Al11 + Al3Ni |  | model | [1] Liao 2019 | Table 5, p. 10, row 27; `ORC-IGQ3XY2X2O` |  |
| 895.15 | eutectic: bcc -> Liq + dhcp + Pr3Al |  | model | [1] Liao 2019 | Table 5, p. 10, row 29; `ORC-UGHMOJWHLY` |  |
| 894.15 | eutectic: Liq -> α\_Pr3Al11 + fcc + τ1 |  | model | [1] Liao 2019 | Table 5, p. 10, row 28; `ORC-V77U2YT66D` |  |
| 815.15 | eutectic: Liq -> τ7 + dhcp + τ8 |  | model | [1] Liao 2019 | Table 5, p. 10, row 30; `ORC-TUTOYLIYVB` |  |
| 784.15 | quasi-peritectic: Liq + PrAl2 -> τ7 + PrAl |  | model | [1] Liao 2019 | Table 5, p. 10, row 31; `ORC-E3HHW5MING` |  |
| 780.15 | eutectic: Liq -> τ8 + NiPr3 + Ni3Pr7 |  | model | [1] Liao 2019 | Table 5, p. 10, row 32; `ORC-TNF3MIPNIH` |  |
| 772.15 | eutectic: Liq -> dhcp + τ8 + NiPr3 |  | model | [1] Liao 2019 | Table 5, p. 10, row 33; `ORC-HYEPCWFULH` |  |
| 771.15 | eutectic: Liq -> τ8 + Ni3Pr7 + NiPr |  | model | [1] Liao 2019 | Table 5, p. 10, row 34; `ORC-RIV5BJEEFY` |  |
| 720.15 | quasi-peritectic: Liq + PrAl -> τ7 + Pr2Al |  | model | [1] Liao 2019 | Table 5, p. 10, row 35; `ORC-M4PDANGH6R` |  |
| 650.15 | quasi-peritectic: Liq + Pr2Al -> τ7 + Pr3Al |  | model | [1] Liao 2019 | Table 5, p. 10, row 36; `ORC-MUZMBWZL3C` |  |
| 626.15 | eutectic: Liq -> τ7 + Pr3Al + dhcp |  | model | [1] Liao 2019 | Table 5, p. 10, row 37; `ORC-IOBALHZFQA` |  |

## 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, Al–Ni–Pr system (29)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Ni2Al3Pr |  | -61.34 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 11; `ORC-EML7MXJBZG.53809d` |  |
| Ni2Al3Pr |  | -58.17 kJ/mol-atom |  | DFT |  |  | [1] Liao 2019; _cites Kirklin 2015_ | Table 4, p. 6, row 12; `ORC-IIFS7E73AH.2c3284` |  |
| Ni2Al3Pr |  | -57.21 kJ/mol-atom |  | DFT |  |  | [1] Liao 2019; _cites Jain 2013_ | Table 4, p. 6, row 13; `ORC-V4FGAD4FTA.13e3ef` |  |
| Ni2Al5Pr |  | -57.02 kJ/mol-atom |  | DFT |  |  | [1] Liao 2019; _cites Kirklin 2015_ | Table 4, p. 6, row 4; `ORC-3ZE4GWV3ZV.2977cb` |  |
| Ni2Al5Pr |  | -52.5 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 6; `ORC-BV43LPFLC5.8aae42` |  |
| Ni2Al5Pr |  | -49.56 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 3; `ORC-DVYF2XWRDN.04eb9c` |  |
| Ni2Al7Pr |  | -40.61 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 1; `ORC-O6ORJJTW46.507807` |  |
| Ni2AlPr2 |  | -56.01 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 29; `ORC-FIVLT3ATCL.757a28` |  |
| Ni2AlPr2 |  | -54.19 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 26; `ORC-REJY3TRGYM.07d430` |  |
| Ni2AlPr2 |  | -40.48 kJ/mol-atom |  | DFT |  |  | [1] Liao 2019; _cites Kirklin 2015_ | Table 4, p. 6, row 27; `ORC-SSF3O7Z5E5.081357` |  |
| Ni8AlPr3 |  | -30.96 kJ/mol-atom |  | DFT |  |  | [1] Liao 2019; _cites Jain 2013_ | Table 4, p. 6, row 19; `ORC-RNIZE2T3B5.91e015` |  |
| NiAl2Pr |  | -55.02 kJ/mol-atom |  | DFT |  |  | [1] Liao 2019; _cites Jain 2013_ | Table 4, p. 6, row 16; `ORC-DRINF3WXUW.9dd593` |  |
| NiAl4Pr |  | -51.83 kJ/mol-atom |  | DFT |  |  | [1] Liao 2019; _cites Jain 2013_ | Table 4, p. 6, row 9; `ORC-KWB4IDIMAR.161f4d` |  |
| NiAl4Pr |  | -49.91 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 10; `ORC-TCQASYORN5.5fc827` |  |
| NiAl4Pr |  | -49.71 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 7; `ORC-GY6HFTN5B5.c054a4` |  |
| NiAlPr |  | -66.97 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 22; `ORC-LX55FPX3UB` |  |
| NiAlPr |  | -62.07 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 25; `ORC-TJIGRAE3UR` |  |
| NiAlPr |  | -56 kJ/mol-atom ± 3 | 300 | experimental |  |  | [1] Liao 2019; _cites Borzone 2003_ | Table 4, p. 6, row 21; `ORC-6FDZV64ILN.5080eb` |  |
| NiAlPr |  | -47.6 kJ/mol-atom |  | DFT |  |  | [1] Liao 2019; _cites Kirklin 2015_ | Table 4, p. 6, row 23; `ORC-O26DKNIH2Y` |  |
| NiAlPr |  | -46.54 kJ/mol-atom |  | DFT |  |  | [1] Liao 2019; _cites Jain 2013_ | Table 4, p. 6, row 24; `ORC-ZKV4HLBZE6` |  |
| NiAl₂Pr |  | -66.32 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 15; `ORC-IMD4244FIX.48561a` |  |
| NiAl₂Pr |  | -66.21 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 17; `ORC-QWEDHM3DYN.90522e` |  |
| NiAl₄Pr |  | -52.02 kJ/mol-atom |  | DFT |  |  | [1] Liao 2019; _cites Kirklin 2015_ | Table 4, p. 6, row 8; `ORC-UMU3U3GRSX.5ce736` |  |
| Ni₂AlPr₂ |  | -38.37 kJ/mol-atom |  | DFT |  |  | [1] Liao 2019; _cites Jain 2013_ | Table 4, p. 6, row 28; `ORC-NCAQTNBNAI.19136e` |  |
| Ni₂Al₃Pr |  | -62.41 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 14; `ORC-47CJFTHNYF.1c3818` |  |
| Ni₂Al₅Pr |  | -56.44 kJ/mol-atom |  | DFT |  |  | [1] Liao 2019; _cites Jain 2013_ | Table 4, p. 6, row 5; `ORC-2MBUDOK3LY.a5c8d0` |  |
| Ni₂Al₇Pr |  | -40.91 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 2; `ORC-UULYRIUEJS.02f3de` |  |
| Ni₈AlPr₃ |  | -38.59 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 20; `ORC-ZN2SD64CUS.21f1de` |  |
| Ni₈AlPr₃ |  | -37.18 kJ/mol-atom |  | model |  |  | [1] Liao 2019 | Table 4, p. 6, row 18; `ORC-GW4TTRFD5N.dcfdf8` |  |

## Sources

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

1. Jinfa Liao, Yuehui Liao, Hang Wang, Ligang Zhang, Yue Ma, Thermodynamic optimization of the Ni–Al–Pr ternary system, Mater. Res. Express 6, 086512 (2019). [doi:10.1088/2053-1591/ab19fa](https://doi.org/10.1088/2053-1591/ab19fa)

## 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/).