# As–Ge–P–S–Se system

> As–Ge–P–S–Se system: 32 accepted literature values (invariant reaction 31, crystal structure 1) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/AS-GE-P-S-SE.html · Markdown: https://data.orchid-project.org/systems/AS-GE-P-S-SE.md

32 accepted literature values from 1 paper(s) (experimental 21, model 11); 0 calculated phase diagram(s).

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

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 21 |
| model | 11 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 31 |
| crystal structure | 1 |

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the As–Ge–P–S–Se system (31)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1029.4 | eutectic: L→(Ge)+GeAs | L: As 0.4; (Ge): As 0; GeAs: As 0.5 | model | [1] Chen 2022 | Table III, p. 4, row 2; `ORC-Q27KD6TBDY` |  |
| 1029.2 | eutectic: L→(As)+GeAs2 | L: As 0.73; (As): As 0.83; GeAs2: As 0.667 | model | [1] Chen 2022 | Table III, p. 4, row 6; `ORC-TT7U3C6MQE` |  |
| 1028.8 | eutectic: L→GeAs+ GeAs2 | L: As 0.6; GeAs: As 0.5; GeAs2: As 0.667 | model | [1] Chen 2022 | Table III, p. 4, row 4; `ORC-UG3HY6MWH3` |  |
| 1027 | eutectic: L→(Ge)+GeAs | L: As 0.402; (Ge): As 0; GeAs: As 0.5 | experimental | [1] Chen 2022; _cites Ugai 1978_ | Table III, p. 4, row 1; `ORC-MXQYHM7DDP` |  |
| 1023 | eutectic: L→GeAs+ GeAs2 | L: As 0.6; GeAs: As 0; GeAs2: As 0.5 | experimental | [1] Chen 2022; _cites Ugai 1978_ | Table III, p. 4, row 3; `ORC-SCRBXUXMLD` |  |
| 1022 | eutectic: L→(As)+GeAs2 | L: As 0.721; (As): As 0.793; GeAs2: As 0.667 | experimental | [1] Chen 2022; _cites Ugai 1978_ | Table III, p. 4, row 5; `ORC-D2YJ5BIHQC` |  |
| 996.8 | peritectic: L+(Ge)→GeP | L: P 0.617; (Ge): P 0; GeP: P 0.5 | model | [1] Chen 2022 | Table III, p. 4, row 31; `ORC-QWJCOHDK4Q` |  |
| 948 | peritectic: L+(Ge)→βGeSe | L: Se 0.505; (Ge): Se 0; βGeSe: Se 0.5 | experimental | [1] Chen 2022; _cites ref. 41_ | Table III, p. 4, row 7; `ORC-2E57HB4YVC` |  |
| 948 | peritectic: L+(Ge)→βGeSe | L: Se 0.506; (Ge): Se 0; βGeSe: Se 0.5 | experimental | [1] Chen 2022; _cites ref. 44_ | Table III, p. 4, row 10; `ORC-NZDU6WYG66` |  |
| 948 | peritectic: L+(Ge)→βGeSe |  | experimental | [1] Chen 2022; _cites ref. 43_ | Table III, p. 4, row 11; `ORC-PH3H7XB3ZM` |  |
| 947.5 | peritectic: L+(Ge)→βGeSe | L: Se 0.503; (Ge): Se 0; βGeSe: Se 0.5 | model | [1] Chen 2022 | Table III, p. 4, row 12; `ORC-OIYJTC6WFN` |  |
| 943 | peritectic: L+(Ge)→βGeSe | L: Se 0.5; (Ge): Se 0; βGeSe: Se 0.5 | experimental | [1] Chen 2022; _cites ref. 42_ | Table III, p. 4, row 8; `ORC-IFPWZNCRBJ` |  |
| 939 | peritectic: L+(Ge)→βGeSe | L: Se 0.505; (Ge): Se 0; βGeSe: Se 0.5 | experimental | [1] Chen 2022; _cites ref. 38_ | Table III, p. 4, row 9; `ORC-L7YHW5JUCX` |  |
| 931 | eutectic: L→(Ge)+ βGeS | L: S 0.471; (Ge): S 0; βGeS: S 0.5 | model | [1] Chen 2022 | Table III, p. 4, row 26; `ORC-WK3AVJH2TT` |  |
| 923 | eutectic: L→(Ge)+ βGeS | L: S 0.48; (Ge): S 0; βGeS: S 0.5 | experimental | [1] Chen 2022; _cites ref. 58_ | Table III, p. 4, row 25; `ORC-373QJCTI43` |  |
| 882.7 | eutectic: L→βGeS+GeS2 | L: S 0.592; βGeS: S 0.5; GeS2: S 0.6667 | model | [1] Chen 2022 | Table III, p. 4, row 28; `ORC-YBX3TT5GG3` |  |
| 882 | eutectic: L→βGeS+GeS2 | L: S 0.59; βGeS: S 0.5; GeS2: S 0.6667 | experimental | [1] Chen 2022; _cites ref. 58_ | Table III, p. 4, row 27; `ORC-AAAPPJQRNA` |  |
| 863 | eutectic: L→αGeSe+GeSe2 |  | experimental | [1] Chen 2022; _cites ref. 43_ | Table III, p. 4, row 17; `ORC-RBNUCTNHUZ` |  |
| 860 | eutectic: L→αGeSe+GeSe2 | L: Se 0.565; αGeSe: Se 0.5; GeSe2: Se 0.6667 | experimental | [1] Chen 2022; _cites ref. 41_ | Table III, p. 4, row 13; `ORC-PIPWE77GSH` |  |
| 856.2 | eutectic: L→αGeSe+GeSe2 | L: Se 0.576; αGeSe: Se 0.5; GeSe2: Se 0.667 | model | [1] Chen 2022 | Table III, p. 4, row 18; `ORC-HMB3QTYSAI` |  |
| 856 | eutectic: L→αGeSe+GeSe2 | L: Se 0.56; αGeSe: Se 0.5; GeSe2: Se 0.6667 | experimental | [1] Chen 2022; _cites ref. 44_ | Table III, p. 4, row 16; `ORC-4UY5YHUEQW` |  |
| 853 | eutectic: L→αGeSe+GeSe2 | L: Se 0.62; αGeSe: Se 0.5; GeSe2: Se 0.6667 | experimental | [1] Chen 2022; _cites ref. 42_ | Table III, p. 4, row 14; `ORC-UD4OBZCWQH` |  |
| 851 | eutectic: L→αGeSe+GeSe2 | L: Se 0.57; αGeSe: Se 0.5; GeSe2: Se 0.6667 | experimental | [1] Chen 2022; _cites ref. 38_ | Table III, p. 4, row 15; `ORC-YJK4UXCQKG` |  |
| 843.4 | eutectic: L → GeP+(P) | L: P 0.972; GeP: P 0.5; (P): P 1 | model | [1] Chen 2022 | Table III, p. 4, row 32; `ORC-XH3AGNFJ3A` |  |
| 658 | L+GeSe2→Ge3Se7 | L: Se 0.85; GeSe2: Se 0.667; Ge3Se7: Se 0.7 | experimental | [1] Chen 2022; _cites ref. 44_ | Table III, p. 4, row 19; `ORC-7OPQ6G4S5T` |  |
| 657 | L+GeSe2→Ge3Se7 | L: Se 0.859; GeSe2: Se 0.667; Ge3Se7: Se 0.7 | model | [1] Chen 2022 | Table III, p. 4, row 20; `ORC-OA5GXZQEO5` |  |
| 494 | eutectic: L→GeSe2+(Se) | L: Se 0.92; GeSe2: Se 0.667; (Se): Se 1 | experimental | [1] Chen 2022; _cites ref. 42_ | Table III, p. 4, row 21; `ORC-MYSWBHGBHJ` |  |
| 486 | eutectic: L→GeSe2+(Se) |  | experimental | [1] Chen 2022; _cites ref. 43_ | Table III, p. 4, row 23; `ORC-3KAXIE26IN` |  |
| 485 | eutectic: L→GeSe2+(Se) | L: Se 0.945; GeSe2: Se 0.667; (Se): Se 1 | experimental | [1] Chen 2022; _cites ref. 44_ | Table III, p. 4, row 22; `ORC-YIQDSSF4AM` |  |
| 470.8 | eutectic: L→GeSe2+(Se) | L: Se 0.943; GeSe2: Se 0.667; (Se): Se 1 | model | [1] Chen 2022 | Table III, p. 4, row 24; `ORC-U2H6QXQ3JI` |  |
| 393 | eutectic: L→GeS2+(S) | GeS2: S 0.667; (S): S 1 | experimental | [1] Chen 2022; _cites ref. 58_ | Table III, p. 4, row 29; `ORC-BR5GTPXCX7` |  |

## Other properties

### Crystal structure (1)

Table: Crystal structure, As–Ge–P–S–Se system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 4.132 Å | 298.15 | (As); _alloy: Ge 0, P 0, S 0, Se 0_ | experimental | [1] Chen 2022; _cites King 1981_ | Table I, p. 2, row 1; `ORC-RM6ZTKLMTX` |  |

## Sources

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

1. Shanxiong Chen, Jiong Wang, Shangzhao Yu, Biao Hu, Qing Wu, Yong Du, Thermodynamic Modeling of the Ge-X (X = As, Se, S, P) Systems, J. Electron. Mater. 51, 2114-2130 (2022). [doi:10.1007/s11664-022-09474-1](https://doi.org/10.1007/s11664-022-09474-1)

## 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/).