# Cu–P–Sn system

> Cu–P–Sn system: 36 accepted literature values (invariant reaction 36) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/CU-P-SN.html · Markdown: https://data.orchid-project.org/systems/CU-P-SN.md

36 accepted literature values from 1 paper(s) (experimental 15, model 21); 0 calculated phase diagram(s). 1 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/CU-P-SN.json) · [CSV](https://data.orchid-project.org/systems/CU-P-SN.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#CU-P-SN) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/CU-P-SN.html) · [Markdown](https://data.orchid-project.org/systems/CU-P-SN.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 15 |
| model | 21 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 36 |

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Cu–P–Sn system (36)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1238.65 | Liq. -> Cu3P + Gas (metastable) | Liq.: P 0.351; Liquid: P 0.351 | model | [1] Oikawa 2024 | Table 3, p. 8, row 16; `ORC-32RRQEQIMN` |  |
| 1106.15 | Liq. -> Cu3P + CuP2 | Liq.: P 0.49; Liquid: P 0.49 | experimental | [1] Oikawa 2024; _cites Ugai 1972_ | Table 3, p. 8, row 18; `ORC-T67EHHRAFZ` |  |
| 1104.35 | Liq. -> Cu3P + CuP2 | Liq.: P 0.4478; Liquid: P 0.4478 | model | [1] Oikawa 2024 | Table 3, p. 8, row 17; `ORC-X2TLMQWBLD` |  |
| 1071.15 | Liq. + α -> β | Liq.: Sn 0.158; Liquid: Sn 0.158 | experimental | [1] Oikawa 2024; _cites Bauer 1923_ | Table 3, p. 8, row 2; `ORC-SDID4AUUK3` |  |
| 1059.35 | Liq. + α -> β | Liq.: Sn 0.1604; Liquid: Sn 0.1604 | model | [1] Oikawa 2024 | Table 3, p. 8, row 1; `ORC-NSS53Z53XX` |  |
| 1053.15 | Liq. + α -> β | Liq.: Sn 0.158; Liquid: Sn 0.158 | experimental | [1] Oikawa 2024; _cites Hamasumi 1938_ [doi](https://doi.org/10.2320/jinstmet1937.2.4_147) | Table 3, p. 8, row 3; `ORC-F4VB5GHOU6` |  |
| 1036.55 | Gas + Liq. + Cu3P -> CuP2 | Liq.: P 0.2392, Sn 0.2415; Liquid: P 0.2392, Sn 0.2415 | model | [1] Oikawa 2024 | Table 3, p. 8, row 33; `ORC-PXWV27XFZ2` |  |
| 987.15 | Liq. -> α + Cu3P | Liq.: P 0.157; Liquid: P 0.157 | experimental | [1] Oikawa 2024; _cites Lindlief 1933_ | Table 3, p. 8, row 14; `ORC-YJK4CJQ4J7` |  |
| 976.85 | Liq. -> α + Cu3P | Liq.: P 0.1598; Liquid: P 0.1598 | model | [1] Oikawa 2024 | Table 3, p. 8, row 13; `ORC-YK6IECMVCH` |  |
| 975.15 | Liq. -> α + Cu3P |  | experimental | [1] Oikawa 2024 | Table 3, p. 8, row 15; `ORC-EIQUT7Y2KY` |  |
| 915.15 | Liq. + α -> Cu3P + β |  | experimental | [1] Oikawa 2024; _cites Takemoto 1987_ | Table 3, p. 8, row 30; `ORC-B7RBB3F7IF` |  |
| 913.15 | β -> Liq. + ε | Liq.: Sn 0.431; Liquid: Sn 0.431 | experimental | [1] Oikawa 2024; _cites Bauer 1923_ | Table 3, p. 8, row 5; `ORC-SRAI52WNAR` |  |
| 911.15 | β -> Liq. + ε | Liq.: Sn 0.445; Liquid: Sn 0.445 | experimental | [1] Oikawa 2024; _cites Hamasumi 1938_ [doi](https://doi.org/10.2320/jinstmet1937.2.4_147) | Table 3, p. 8, row 6; `ORC-R46ZNXQHP4` |  |
| 910.15 | Liq. + α -> Cu3P + β | Liq.: P 0.0889, Sn 0.0895; Liquid: P 0.0889, Sn 0.0895 | experimental | [1] Oikawa 2024; _cites Vero 1933_ [doi](https://doi.org/10.1002/zaac.19332130306) | Table 3, p. 8, row 29; `ORC-5CCKIKZR6O` |  |
| 902.45 | Liq. -> α + Cu3P + β | Liq.: P 0.0997, Sn 0.0908; Liquid: P 0.0997, Sn 0.0908 | model | [1] Oikawa 2024 | Table 3, p. 8, row 28; `ORC-3I3EPDEI2Q` |  |
| 901.95 | β -> Liq. + ε | Liq.: Sn 0.4636; Liquid: Sn 0.4636 | model | [1] Oikawa 2024 | Table 3, p. 8, row 4; `ORC-IWLOGLUD3W` |  |
| 901.25 | Liq. + ε -> Cu3P + ζ | Liq.: P 0.0908, Sn 0.1358; Liquid: P 0.0908, Sn 0.1358 | model | [1] Oikawa 2024 | Table 3, p. 8, row 32; `ORC-5QSA4F6J5Y` |  |
| 899.55 | Liq. -> β + ζ + Cu3P | Liq.: P 0.0904, Sn 0.1307; Liquid: P 0.0904, Sn 0.1307 | model | [1] Oikawa 2024 | Table 3, p. 8, row 31; `ORC-A7XDFMM7R6` |  |
| 852.75 | Liq. -> Cu2P7 + P(Red) | Liq.: P 0.9997; Liquid: P 0.9997 | model | [1] Oikawa 2024 | Table 3, p. 8, row 20; `ORC-HOE4Y7B5NP` |  |
| 850.85 | Liq.2 -> Liq.1 + P(Red) | Liquid: P 0.1775 | model | [1] Oikawa 2024 | Table 3, p. 8, row 26; `ORC-F4QKRCN3DU` |  |
| 837.15 | Liq.1 + Liq.2 -> Sn4P3 | Liquid: P 0.33 | experimental | [1] Oikawa 2024; _cites Zavrazhnov 2018_ [doi](https://doi.org/10.1007/s10973-018-7123-0) | Table 3, p. 8, row 24; `ORC-ON6OZO45R2` |  |
| 834.05 | Liq.1 + P(Red) -> Sn4P3 | Liquid: P 0.1645 | model | [1] Oikawa 2024 | Table 3, p. 8, row 27; `ORC-H33OX3QEEN` |  |
| 832.15 | Liq.1 + Liq.2 -> Sn4P3 | Liquid: P 0.322 | experimental | [1] Oikawa 2024; _cites Arita 1985_ [doi](https://doi.org/10.2320/matertrans1960.26.242) | Table 3, p. 8, row 23; `ORC-SZHAU26EPF` |  |
| 824.15 | Liq.2 -> Sn4P3 + SnP3 (metastable) | Liquid: P 0.57; Liq.: P 0.57 | experimental | [1] Oikawa 2024; _cites Zavrazhnov 2018_ [doi](https://doi.org/10.1007/s10973-018-7123-0) | Table 3, p. 8, row 25; `ORC-IDHGUBL6YB` |  |
| 777.95 | Liq. + Gas -> Sn4P3 | Liq.: P 0.0862; Liquid: P 0.0862 | model | [1] Oikawa 2024 | Table 3, p. 8, row 22; `ORC-BIMY33AXO3` |  |
| 740.45 | Gas + Liq. + CuP2 -> Sn4P3 | Liq.: P 0.1113, Sn 0.8884; Liquid: P 0.1113, Sn 0.8884 | model | [1] Oikawa 2024 | Table 3, p. 8, row 34; `ORC-2UI6WARIGC` |  |
| 693.15 | Liq. + ε -> η | Liq.: Sn 0.844; Liquid: Sn 0.844 | experimental | [1] Oikawa 2024; _cites Bauer 1923_ | Table 3, p. 8, row 8; `ORC-TTQ5CID633` |  |
| 680.45 | Liq. + ε -> η | Liq.: Sn 0.8792; Liquid: Sn 0.8792 | model | [1] Oikawa 2024 | Table 3, p. 8, row 7; `ORC-2O4L4HAAOH` |  |
| 672.15 | Liq. + ε -> η | Liq.: Sn 0.868; Liquid: Sn 0.868 | experimental | [1] Oikawa 2024; _cites Hamasumi 1938_ [doi](https://doi.org/10.2320/jinstmet1937.2.4_147) | Table 3, p. 8, row 9; `ORC-ISUFJFRGWS` |  |
| 664.25 | Liq. -> ε + η + Cu3P | Liq.: P 0.0371, Sn 0.7528; Liquid: P 0.0371, Sn 0.7528 | model | [1] Oikawa 2024 | Table 3, p. 8, row 38; `ORC-ZBSJWFZRKY` |  |
| 504.85 | Liq. -> βSn + Sn4P3 | Liq.: P 7.000e-4; Liquid: P 7.000e-4 | model | [1] Oikawa 2024 | Table 3, p. 8, row 21; `ORC-VEZ67ERDSA` |  |
| 504.75 | Liq. + CuP2 -> βSn + Sn4P3 | Liq.: P 7.000e-4, Sn 0.9989; Liquid: P 7.000e-4, Sn 0.9989 | model | [1] Oikawa 2024 | Table 3, p. 8, row 35; `ORC-UJK3ENPGLR` |  |
| 501.95 | Liq. -> η + βSn | Liq.: Sn 0.9891; Liquid: Sn 0.9891 | model | [1] Oikawa 2024 | Table 3, p. 8, row 10; `ORC-VJG3GBTLBW` |  |
| 501.25 | Liq. + Cu3P1 -> βSn + CuP2 | Liq.: P 0.0046, Sn 0.9736; Liquid: P 0.0046, Sn 0.9736 | model | [1] Oikawa 2024 | Table 3, p. 8, row 36; `ORC-U5VY7L5H5M` |  |
| 500.55 | Liq. -> βSn + η + Cu3P | Liq.: P 0.0046, Sn 0.9711; Liquid: P 0.0046, Sn 0.9711 | model | [1] Oikawa 2024 | Table 3, p. 8, row 37; `ORC-S7EFFZQARK` |  |
| 500.15 | Liq. -> η + βSn | Liq.: Sn 0.972; Liquid: Sn 0.972 | experimental | [1] Oikawa 2024; _cites Hamasumi 1938_ [doi](https://doi.org/10.2320/jinstmet1937.2.4_147) | Table 3, p. 8, row 12; `ORC-SNVEM2RFUX` |  |

## Sources

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

1. Katsunari Oikawa, Nobufumi Ueshima, Thermodynamic Reassessment of the Binary Cu-Sn, Cu-P, and Sn-P and Ternary Cu-Sn-P Systems, J. Phase Equilib. Diffus. 45, 547-566 (2024). [doi:10.1007/s11669-024-01112-z](https://doi.org/10.1007/s11669-024-01112-z)

## 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/).