# Ir–W system > Ir–W system: 12 accepted literature values (crystal structure 12) and 1 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote. HTML: https://data.orchid-project.org/systems/IR-W.html · Markdown: https://data.orchid-project.org/systems/IR-W.md 12 accepted literature values from 1 paper(s) (experimental 6, model 6); 1 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/IR-W.json) · [CSV](https://data.orchid-project.org/systems/IR-W.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#IR-W) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#IR-W/IrW-20Hua.json) · [phases (8)](https://data.orchid-project.org/phases/pages/IR-W.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/IR-W.html) · [Markdown](https://data.orchid-project.org/systems/IR-W.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | experimental | 6 | | model | 6 | Table: Accepted values by property group | Property group | Values | |---|---:| | crystal structure | 12 | ## 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 | |---|---|---|---| | IrW-20Hua.tdb | Y.-Y. Huang, B. Wu, F. Li, L.-L. Chen, Z.-X. Deng, K. Chang, J. Mining Metall. B, 56, 109-18(2020). [doi:10.2298/JMMB190211001H](https://doi.org/10.2298/JMMB190211001H) | `ad9a9f3cc83e11548f4603d7e9aae44dda1aabfcb1ed6e17153220c5bd37a338` | [viewer](https://orchid-project.org/phase-diagrams/#IR-W/IrW-20Hua.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/IrW-20Hua.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/IrW-20Hua.json) | Table: Calculated three-phase invariants (model, mole fraction of the second component) | TDB file | T (K) | Phases at the invariant | |---|---:|---| | IrW-20Hua.tdb | 2846.18 | LIQUID (x(W) 0.70735) + IRW3_D8B (x(W) 0.7995) + BCC_A2 (x(W) 0.93883) | | IrW-20Hua.tdb | 2728.42 | IRW_A3 (x(W) 0.60218) + LIQUID (x(W) 0.64827) + IRW3_D8B (x(W) 0.75481) | | IrW-20Hua.tdb | 2579.39 | FCC_A1 (x(W) 0.19061) + LIQUID (x(W) 0.22053) + IRW_A3 (x(W) 0.23656) | | IrW-20Hua.tdb | 2074.88 | IRW_A3 (x(W) 0.56273) + IRW3_D8B (x(W) 0.75184) + BCC_A2 (x(W) 0.95018) | | IrW-20Hua.tdb | 1921.14 | FCC_A1 (x(W) 0.20837) + IR3W_D019 (x(W) 0.23331) + IRW_A3 (x(W) 0.2404) | | IrW-20Hua.tdb | 1847.89 | IRW_B19 (x(W) 0.49767) + IRW_A3 (x(W) 0.54313) + BCC_A2 (x(W) 0.96487) | | IrW-20Hua.tdb | 1507.94 | IR3W_D019 (x(W) 0.33617) + IRW_A3 (x(W) 0.37392) + IRW_B19 (x(W) 0.47839) | Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/IR/IR-W.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/IR/IR-W.json) ## Other properties ### Crystal structure (12) Table: Crystal structure, Ir–W system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Lattice a | 5.551 Å | | Ir3W; _alloy: W 0.25_ | model | [1] Huang 2020 | Table 1, p. 3, row 20; `ORC-I64SNARZSG.19d4dd` | | | Lattice a | 4.486 Å | | IrW; _alloy: W 0.5_ | model | [1] Huang 2020 | Table 1, p. 3, row 22; `ORC-FQWF2C5ONS.11bbb5` | | | Lattice a | 5.496 Å | 298.15 | Ir3W; _alloy: W 0.25_ | experimental | [1] Huang 2020; _cites Giessen 1965_ | Table 1, p. 3, row 19; `ORC-NOPLPOBQME.84c717` | | | Lattice a | 4.452 Å | 298.15 | IrW; _alloy: W 0.5_ | experimental | [1] Huang 2020; _cites Giessen 1965_ | Table 1, p. 3, row 21; `ORC-3WYHJ7HWKR.812c97` | | | Lattice b | 5.551 Å | | Ir3W; _alloy: W 0.25_ | model | [1] Huang 2020 | Table 1, p. 3, row 20; `ORC-I64SNARZSG.e49071` | | | Lattice b | 2.788 Å | | IrW; _alloy: W 0.5_ | model | [1] Huang 2020 | Table 1, p. 3, row 22; `ORC-FQWF2C5ONS.0fc184` | | | Lattice b | 5.496 Å | 298.15 | Ir3W; _alloy: W 0.25_ | experimental | [1] Huang 2020; _cites Giessen 1965_ | Table 1, p. 3, row 19; `ORC-NOPLPOBQME.7135eb` | | | Lattice b | 2.76 Å | 298.15 | IrW; _alloy: W 0.5_ | experimental | [1] Huang 2020; _cites Giessen 1965_ | Table 1, p. 3, row 21; `ORC-3WYHJ7HWKR.5ca706` | | | Lattice c | 4.436 Å | | Ir3W; _alloy: W 0.25_ | model | [1] Huang 2020 | Table 1, p. 3, row 20; `ORC-I64SNARZSG.518499` | | | Lattice c | 4.866 Å | | IrW; _alloy: W 0.5_ | model | [1] Huang 2020 | Table 1, p. 3, row 22; `ORC-FQWF2C5ONS.ccf8f1` | | | Lattice c | 4.39 Å | 298.15 | Ir3W; _alloy: W 0.25_ | experimental | [1] Huang 2020; _cites Giessen 1965_ | Table 1, p. 3, row 19; `ORC-NOPLPOBQME.bc0e26` | | | Lattice c | 4.811 Å | 298.15 | IrW; _alloy: W 0.5_ | experimental | [1] Huang 2020; _cites Giessen 1965_ | Table 1, p. 3, row 21; `ORC-3WYHJ7HWKR.54a47c` | | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. Y.-Y. Huang, B. Wu, F. Li, L.-L. Chen, Z.-X. Deng, K. Chang, First-principles and CALPHAD-type study of the Ir-Mo and Ir-W systems, J min metall B Metall 56, 109-118 (2020). [doi:10.2298/jmmb190211001h](https://doi.org/10.2298/jmmb190211001h) ## 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=\, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).