# Se–Zn system

> Se–Zn system: 15 accepted literature values (formation 8, phase equilibrium 4, invariant reaction 3) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/SE-ZN.html · Markdown: https://data.orchid-project.org/systems/SE-ZN.md

15 accepted literature values from 1 paper(s) (experimental 9, model 6); 0 calculated phase diagram(s).

Data: [JSON](https://data.orchid-project.org/literature/systems/SE-ZN.json) · [CSV](https://data.orchid-project.org/systems/SE-ZN.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#SE-ZN) · [phases (5)](https://data.orchid-project.org/phases/pages/SE-ZN.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/SE-ZN.html) · [Markdown](https://data.orchid-project.org/systems/SE-ZN.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 9 |
| model | 6 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 3 |
| phase equilibrium | 4 |
| formation | 8 |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/SE/SE-ZN.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/SE/SE-ZN.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Se–Zn system (3)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1675.2 | monotectic: Liq -> liq + ZnSe | Liq: Se 0.4; liq: Se 0.16; ZnSe: Se 0.5, Zn 0.5 | model | [1] Chen 2014 | Table 5, p. 5, row 2; `ORC-ESS7TSOAWI` |  |
| 692.7 | eutectic: Liq -> (Zn) + ZnSe | Liq: Se 0; ZnSe: Se 0.5, Zn 0.5 | model | [1] Chen 2014 | Table 5, p. 5, row 1; `ORC-HJ2QPZABP4` |  |
| 494 | eutectic: Liq -> (Se) + ZnSe | Liq: Se 1; ZnSe: Se 0.5, Zn 0.5 | model | [1] Chen 2014 | Table 5, p. 5, row 3; `ORC-3TXDUOA2UG` |  |

## 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, Se–Zn system (5)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| ZnSe |  | -196.6 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Chen 2014; _cites Wosten 1962_ [doi](https://doi.org/10.1021/j100813a010) | Table 7, p. 6, row 2; `ORC-WIONV62Y24` |  |
| ZnSe |  | -177.6 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Chen 2014; _cites Nasar 1990_ | Table 7, p. 6, row 5; `ORC-YYVEZCDIFR.d6e0bb` |  |
| ZnSe |  | -175.9 kJ/mol (basis unstated) |  | model |  |  | [1] Chen 2014 | Table 7, p. 6, row 1; `ORC-BAZXX5ZPR6.469b6d` |  |
| ZnSe |  | -164.4 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Chen 2014; _cites Goldfinger 1963_ [doi](https://doi.org/10.1039/tf9635902851) | Table 7, p. 6, row 3; `ORC-LSHCIH5DVC` |  |
| ZnSe |  | -163.2 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Chen 2014; _cites Terpilowski 1967_ | Table 7, p. 6, row 4; `ORC-PL4IY5FTMK.f97c79` |  |

## Other properties

### Phase equilibrium (4)

Table: Phase equilibrium, Se–Zn system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase composition |  | 1373 (>) | congruent melting; _liquid: Zn 0.5; ZnSe: Zn 0.5_ | experimental | [1] Chen 2014; _cites Chikashige 1917_ | Table 6, p. 6, row 2; `ORC-S7VOMLZDPI` |  |
| Phase composition |  | 1788 | congruent melting; _liquid: Zn 0.5; ZnSe: Zn 0.5_ | experimental | [1] Chen 2014; _cites Fischer 1959_ [doi](https://doi.org/10.1149/1.2427507) | Table 6, p. 6, row 3; `ORC-I62HZYWQPV` |  |
| Phase composition |  | 1799 | congruent melting; _liquid: Zn 0.5; ZnSe: Zn 0.5_ | experimental | [1] Chen 2014; _cites Sysoev 1967_ | Table 6, p. 6, row 4; `ORC-QNESFLM4RY` |  |
| Phase composition |  | 1811 | congruent melting; _liquid: Zn 0.5; ZnSe: Zn 0.5_ | model | [1] Chen 2014 | Table 6, p. 6, row 1; `ORC-5OOEUWPBI6` |  |

### Formation (3)

Table: Formation, Se–Zn system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Entropy of formation; _printed: Entropies of formation_ | -13.2 J/mol (basis unstated)/K |  | ZnSe; _alloy: Zn 0.5_ | model | [1] Chen 2014 | Table 7, p. 6, row 1; `ORC-BAZXX5ZPR6.7b1d80` |  |
| Entropy of formation; _printed: Entropies of formation_ | -13.8 J/mol (basis unstated)/K | 298.15 | ZnSe; _alloy: Zn 0.5_ | experimental | [1] Chen 2014; _cites Terpilowski 1967_ | Table 7, p. 6, row 4; `ORC-PL4IY5FTMK.adbb34` |  |
| Entropy of formation; _printed: Entropies of formation_ | -13.4 J/mol (basis unstated)/K | 298.15 | ZnSe; _alloy: Zn 0.5_ | experimental | [1] Chen 2014; _cites Nasar 1990_ | Table 7, p. 6, row 5; `ORC-YYVEZCDIFR.fab260` |  |

## Sources

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

1. Yang Chen, Yajun Liu, Maoyou Chu, Lijun Wang, Phase diagrams and thermodynamic descriptions for the Bi–Se and Zn–Se binary systems, Journal of Alloys and Compounds 617, 423-428 (2014). [doi:10.1016/j.jallcom.2014.08.001](https://doi.org/10.1016/j.jallcom.2014.08.001)

## 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/).