# Er system

> Er system: 23 accepted literature values (crystal structure 23) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

23 accepted literature values from 5 paper(s) (experimental 7, model 4, DFT 10, unspecified 2); 0 calculated phase diagram(s).

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

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 7 |
| model | 4 |
| DFT | 10 |
| unspecified | 2 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| crystal structure | 23 |

## Other properties

### Crystal structure (23)

Table: Crystal structure, Er system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 3.513 Å | 0 | Er; _alloy: Er 1_ | DFT | [1] Wang 2013 | Table 3, p. 3, row 3; `ORC-2NBND7J2WU.3af1f4` |  |
| Lattice a; _printed: a_ | 3.576 Å |  | Er; _alloy: Er 1_ | model | [2] Long 2010; _cites Wang 2004_ [doi](https://doi.org/10.1016/j.calphad.2004.05.002) | Table 1, p. 3, row 29; `ORC-7KUXEHQDTU.68c36d` |  |
| Lattice a | 3.581 Å | 0 | Er; _alloy: Er 1_ | DFT | [3] Bennoui 2022 | Table 1, p. 3, row 13; `ORC-EB44LCPHBN.61276a` |  |
| Lattice a | 3.513 Å | 0 | Er; _alloy: Er 1_ | DFT | [3] Bennoui 2022; _cites Wang 2013_ [doi](https://doi.org/10.1016/j.tca.2013.05.024) | Table 1, p. 3, row 12; `ORC-IALRJ2ETFL.3f153a` |  |
| Lattice a; _printed: a_ | 3.559 Å |  | Er; _alloy: Er 1_ | model | [2] Long 2010; _cites Beaudry 1978_ | Table 1, p. 3, row 30; `ORC-PPGWMVMC6C.ec524c` |  |
| Lattice a | 3.5592 Å | 298.15 | Er; _Er: Er 1_ | unspecified | [4] Anderson 1992 | Table 2, p. 1, row 1; `ORC-4CGYOLXTBY.f398f7` |  |
| Lattice a; _printed: a_ | 3.575 Å | 298.15 | Er; _alloy: Er 1_ | DFT | [2] Long 2010 | Table 1, p. 3, row 28; `ORC-4ZRSER2BH2.327605` |  |
| Lattice a | 3.495 Å | 298.15 | Er; _alloy: Er 1_ | experimental | [1] Wang 2013; _cites Pravica 2005_ [doi](https://doi.org/10.1103/physrevb.72.214122) | Table 3, p. 3, row 4; `ORC-NRPQJRLOCW.250a3a` |  |
| Lattice a | 3.495 Å | 298.15 | Er; _alloy: Er 1_ | experimental | [3] Bennoui 2022; _cites Pravica 2005_ [doi](https://doi.org/10.1103/physrevb.72.214122) | Table 1, p. 3, row 11; `ORC-YLI2FFIJYV.b82ba1` |  |
| Lattice a | 3.559 Å | 298.15 | αEr | experimental | [5] Mascaro 2013; _cites Spedding 1956_ [doi](https://doi.org/10.1107/s0365110x5600156x) | Table 1, p. 2, row 1; `ORC-IAXRHXROZW.66c0a3` |  |
| Lattice b | 3.581 Å | 0 | Er; _alloy: Er 1_ | DFT | [3] Bennoui 2022 | Table 1, p. 3, row 13; `ORC-EB44LCPHBN.a3361c` |  |
| Lattice b | 3.513 Å | 0 | Er; _alloy: Er 1_ | DFT | [3] Bennoui 2022; _cites Wang 2013_ [doi](https://doi.org/10.1016/j.tca.2013.05.024) | Table 1, p. 3, row 12; `ORC-IALRJ2ETFL.60e5f5` |  |
| Lattice b | 3.495 Å | 298.15 | Er; _alloy: Er 1_ | experimental | [3] Bennoui 2022; _cites Pravica 2005_ [doi](https://doi.org/10.1103/physrevb.72.214122) | Table 1, p. 3, row 11; `ORC-YLI2FFIJYV.2b3775` |  |
| Lattice c | 5.517 Å | 0 | Er; _alloy: Er 1_ | DFT | [1] Wang 2013 | Table 3, p. 3, row 3; `ORC-2NBND7J2WU.2ba085` |  |
| Lattice c; _printed: c_ | 5.543 Å |  | Er; _alloy: Er 1_ | model | [2] Long 2010; _cites Wang 2004_ [doi](https://doi.org/10.1016/j.calphad.2004.05.002) | Table 1, p. 3, row 29; `ORC-7KUXEHQDTU.4b6f3f` |  |
| Lattice c | 5.553 Å | 0 | Er; _alloy: Er 1_ | DFT | [3] Bennoui 2022 | Table 1, p. 3, row 13; `ORC-EB44LCPHBN.b97412` |  |
| Lattice c | 5.517 Å | 0 | Er; _alloy: Er 1_ | DFT | [3] Bennoui 2022; _cites Wang 2013_ [doi](https://doi.org/10.1016/j.tca.2013.05.024) | Table 1, p. 3, row 12; `ORC-IALRJ2ETFL.7ed06c` |  |
| Lattice c; _printed: c_ | 5.585 Å |  | Er; _alloy: Er 1_ | model | [2] Long 2010; _cites Beaudry 1978_ | Table 1, p. 3, row 30; `ORC-PPGWMVMC6C.090f12` |  |
| Lattice c | 5.585 Å | 298.15 | Er; _Er: Er 1_ | unspecified | [4] Anderson 1992 | Table 2, p. 1, row 1; `ORC-4CGYOLXTBY.c3a516` |  |
| Lattice c; _printed: c_ | 5.541 Å | 298.15 | Er; _alloy: Er 1_ | DFT | [2] Long 2010 | Table 1, p. 3, row 28; `ORC-4ZRSER2BH2.9824ea` |  |
| Lattice c | 5.486 Å | 298.15 | Er; _alloy: Er 1_ | experimental | [1] Wang 2013; _cites Pravica 2005_ [doi](https://doi.org/10.1103/physrevb.72.214122) | Table 3, p. 3, row 4; `ORC-NRPQJRLOCW.e02677` |  |
| Lattice c | 5.486 Å | 298.15 | Er; _alloy: Er 1_ | experimental | [3] Bennoui 2022; _cites Pravica 2005_ [doi](https://doi.org/10.1103/physrevb.72.214122) | Table 1, p. 3, row 11; `ORC-YLI2FFIJYV.54ca8e` |  |
| Lattice c | 5.587 Å | 298.15 | αEr | experimental | [5] Mascaro 2013; _cites Spedding 1956_ [doi](https://doi.org/10.1107/s0365110x5600156x) | Table 1, p. 2, row 1; `ORC-IAXRHXROZW.71e61b` |  |

## Sources

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

1. Jinsan Wang, Changrong Li, Cuiping Guo, Zhenmin Du, Bo Wu, Thermodynamic assessment of the Bi–Er and the Bi–Dy systems, Thermochimica Acta 566, 44-49 (2013). [doi:10.1016/j.tca.2013.05.024](https://doi.org/10.1016/j.tca.2013.05.024)
2. Z.H. Long, Y.J. Yang, S. Jin, H.S. Liu, F. Zheng, Z.P. Jin, Thermodynamic assessments of Ag–Dy and Ag–Er binary systems, Journal of Alloys and Compounds 489, 146-151 (2010). [doi:10.1016/j.jallcom.2009.09.036](https://doi.org/10.1016/j.jallcom.2009.09.036)
3. S. Bennoui, Y. Djaballah, V. Vassiliev, A. Belgacem-Bouzida, Thermodynamic Study of Er-Bi and Er-Te Systems by Combination of First-Principles Calculations and the CALPHAD Method, J. Phase Equilib. Diffus. 43, 126-138 (2022). [doi:10.1007/s11669-022-00947-8](https://doi.org/10.1007/s11669-022-00947-8)
4. T. J. Anderson, I. Ansara, The Ga-Sn (gallium-tin) system, JPE 13, 181-189 (1992). [doi:10.1007/bf02667485](https://doi.org/10.1007/bf02667485)
5. Aurore Mascaro, Caroline Toffolon-Masclet, Caroline Raepsaet, Jean-Marc Joubert, Experimental study and thermodynamic assessment of the erbium–hydrogen binary system, Calphad 41, 50-59 (2013). [doi:10.1016/j.calphad.2013.01.004](https://doi.org/10.1016/j.calphad.2013.01.004)

## 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/).