# Ga–Hg system

> Ga–Hg system: 8 accepted literature values (invariant reaction 8) and 2 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/GA-HG.html · Markdown: https://data.orchid-project.org/systems/GA-HG.md

8 accepted literature values from 1 paper(s) (experimental 1, model 3, unspecified 4); 2 calculated phase diagram(s). 2 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/GA-HG.json) · [CSV](https://data.orchid-project.org/systems/GA-HG.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#GA-HG) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#GA-HG/GaHg-09Fen.json) · [phases (3)](https://data.orchid-project.org/phases/pages/GA-HG.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/GA-HG.html) · [Markdown](https://data.orchid-project.org/systems/GA-HG.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 1 |
| model | 3 |
| unspecified | 4 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 8 |

## Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Table: Assessments with a calculated phase diagram

| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| GaHg-09Fen.tdb | Y. Feng, R.C. Wang, C.Q. Peng, H.S. Liu, J. Cent. South Univ. Technol., 16, 32-37(2009). [doi:10.1007/s11771-009-0005-7](https://doi.org/10.1007/s11771-009-0005-7) | `d689d1f31debfa2aa99b24ee8fd4b97c806092a052e3181dd62d0899bccb5ea8` | [viewer](https://orchid-project.org/phase-diagrams/#GA-HG/GaHg-09Fen.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/GaHg-09Fen.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/GaHg-09Fen.json) |
| GaHg-91Ans-LB.tdb | I. Ansara, unpublished, 1991. | `b02caa627e3f0d5a0f2572ccdcc33cd4cfb11024292e844622b3a70a047e0fb0` | [viewer](https://orchid-project.org/phase-diagrams/#GA-HG/GaHg-91Ans-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/GaHg-91Ans-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/GaHg-91Ans-LB.json) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/GA/GA-HG.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/GA/GA-HG.json) · [CALPHAD hull GaHg-91Ans-LB](https://data.orchid-project.org/hulls/calphad-sgte/GA/GA-HG--GaHg-91Ans-LB.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Ga–Hg system (8)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 476.5 | L \<-> L1 + L2 | L: Hg 0.5; L1: Hg 0.5; L2: Hg 0.5 | unspecified | [1] Feng 2009; _cites ref. 9_ | Table 5, p. 4, row 9; `ORC-MS2BZK5M6A` |  |
| 473.9 | L ↔ L1+L2 | L: Hg 0.5; L1: Hg 0.5; L2: Hg 0.5 | model | [1] Feng 2009 | Table 5, p. 4, row 8; `ORC-YXJV2NZ57Y` |  |
| 300.7 | L1↔(Ga)+L2 |  | experimental | [1] Feng 2009; _cites DORON_ | Table 5, p. 4, row 3; `ORC-O5TLZM6VKE` |  |
| 299.9 | L1↔(Ga)+L2 |  | unspecified | [1] Feng 2009; _cites ref. 13_ | Table 5, p. 4, row 2; `ORC-QP7WGISUIZ` |  |
| 299.7 | L1↔(Ga)+L2 | L1: Hg 0.023; (Ga): Hg 2.000e-4; L2: Hg 0.967 | unspecified | [1] Feng 2009; _cites ref. 9_ | Table 5, p. 4, row 1; `ORC-KPBUBQFHAK` |  |
| 299.7 | L1↔(Ga)+L2 | L1: Hg 0.0097; (Ga): Hg 3.000e-4; L2: Hg 0.969 | model | [1] Feng 2009 | Table 5, p. 4, row 4; `ORC-PVWUCGGUOU` |  |
| 233.4 | L2↔(Hg)+ (Ga) | L2: Hg 0.995; (Hg): Hg 1; (Ga): Hg 0 | model | [1] Feng 2009 | Table 5, p. 4, row 6; `ORC-XN6NYHXEXV` |  |
| 233.3 | L2↔(Hg)+ (Ga) | L2: Hg 0.996; (Hg): Hg 0.996; (Ga): Hg 2.000e-4 | unspecified | [1] Feng 2009; _cites ref. 9_ | Table 5, p. 4, row 5; `ORC-G2JQFF4QFB` |  |

## Sources

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

1. Yan Feng, Ri-chu Wang, Chao-qun Peng, Hua-shan Liu, Thermodynamic reassessment of Ga-Hg and Mg-Hg systems, J. Cent. South Univ. Technol. 16, 32-37 (2009). [doi:10.1007/s11771-009-0005-7](https://doi.org/10.1007/s11771-009-0005-7)

## 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-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735859
- 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); 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_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@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/).