Au–Hf system

28 accepted literature values from 1 paper(s) (experimental 14, model 14); 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 · CSV · interactive explorer · interactive phase diagram · phases (12) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	14
model	14

Accepted values by property group
Property group	Values
invariant reaction	28

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.

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
AuHf-03Du-LB.tdb	Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003). doi:10.1016/S0925-8388(02)01293-8	`3f1b621c7e2af58a9aab5d758f5f13092a5c8e15e07691209c4a54d47a75299f`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
AuHf-03Du-LB.tdb	3988.41	AUHF_BETA (x(Hf) 3.400e-4) + LIQUID#2 (x(Hf) 0.04974) + LIQUID (x(Hf) 0.45649)
AuHf-03Du-LB.tdb	1821.8	AU2HF_C11B (x(Hf) 0.32404) + LIQUID (x(Hf) 0.38313) + AUHF_BETA (x(Hf) 0.47084)
AuHf-03Du-LB.tdb	1815.44	LIQUID (x(Hf) 0.23849) + AU3HF_D0A (x(Hf) 0.25) + AU2HF_C11B (x(Hf) 0.29302)
AuHf-03Du-LB.tdb	1785.98	AU2HF_C11B (x(Hf) 0.32494) + AU10HF7 (x(Hf) 0.41176) + AUHF_BETA (x(Hf) 0.46905)
AuHf-03Du-LB.tdb	1761.28	AUHF_BETA (x(Hf) 0.49981) + LIQUID (x(Hf) 0.62385) + AUHF2 (x(Hf) 0.66667)
AuHf-03Du-LB.tdb	1676.96	AUHF2 (x(Hf) 0.66667) + LIQUID (x(Hf) 0.74973) + BCC_A2 (x(Hf) 0.87087)
AuHf-03Du-LB.tdb	1676.96	AUHF2 (x(Hf) 0.66667) + LIQUID (x(Hf) 0.74978) + BCC_A2 (x(Hf) 0.87093)
AuHf-03Du-LB.tdb	1570.94	LIQUID (x(Hf) 0.15423) + AU4HF (x(Hf) 0.2) + AU3HF_D0A (x(Hf) 0.25)
AuHf-03Du-LB.tdb	1570.94	LIQUID (x(Hf) 0.15423) + AU4HF (x(Hf) 0.2) + AU3HF_D0A (x(Hf) 0.25)
AuHf-03Du-LB.tdb	1570.94	LIQUID (x(Hf) 0.15427) + AU4HF (x(Hf) 0.2) + AU3HF_D0A (x(Hf) 0.25)
AuHf-03Du-LB.tdb	1559.13	AUHF2 (x(Hf) 0.66667) + BCC_A2 (x(Hf) 0.88179) + HCP_A3 (x(Hf) 0.97148)
AuHf-03Du-LB.tdb	1559.13	AUHF2 (x(Hf) 0.66667) + BCC_A2 (x(Hf) 0.88184) + HCP_A3 (x(Hf) 0.97149)
AuHf-03Du-LB.tdb	1418.11	LIQUID (x(Hf) 0.10907) + AU5HF_D1A (x(Hf) 0.15399) + AU4HF (x(Hf) 0.2)
AuHf-03Du-LB.tdb	1418.11	LIQUID (x(Hf) 0.10924) + AU5HF_D1A (x(Hf) 0.15404) + AU4HF (x(Hf) 0.2)
AuHf-03Du-LB.tdb	1386.92	AUHF_BETA (x(Hf) 0.49993) + AUHF_B11 (x(Hf) 0.49993) + AUHF2 (x(Hf) 0.66667)
AuHf-03Du-LB.tdb	1373.06	LIQUID (x(Hf) 0.0899) + FCC_A1 (x(Hf) 0.09286) + AU5HF_D1A (x(Hf) 0.14646)
AuHf-03Du-LB.tdb	1303.96	AU10HF7 (x(Hf) 0.41176) + AUHF_BETA (x(Hf) 0.47061) + AUHF_B11 (x(Hf) 0.47532)
AuHf-03Du-LB.tdb	1303.96	AU10HF7 (x(Hf) 0.41176) + AUHF_BETA (x(Hf) 0.4706) + AUHF_B11 (x(Hf) 0.47532)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Au–Hf system (28)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
2023	congruent melting: liq.->βAuHf	liq.: Hf 0.5; βAuHf: Hf 0.5	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 16 report
2020	congruent melting: liq.->βAuHf	liq.: Hf 0.4971; βAuHf: Hf 0.4971	model	[1] Du 2003	Table 2, p. 4, row 15 report
1928	congruent melting: liq.->Au2Hf	liq.: Hf 0.3068; Au2Hf: Hf 0.3068	model	[1] Du 2003	Table 2, p. 4, row 9 report
1928	congruent melting: liq.->Au2Hf	liq.: Hf 0.33; Au2Hf: Hf 0.33	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 10 report
1822	eutectic: liq.->Au2Hf+βAuHf	liq.: Hf 0.42; Au2Hf: Hf 0.33; βAuHf: Hf 0.45	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 12 report
1822	eutectic: liq.->Au2Hf+βAuHf	liq.: Hf 0.3831; Au2Hf: Hf 0.324; βAuHf: Hf 0.4709	model	[1] Du 2003	Table 2, p. 4, row 11 report
1816	liq. + Au2Hf->Au3Hf	liq.: Hf 0.2385; Au2Hf: Hf 0.293; Au3Hf: Au 0.75, Hf 0.25	model	[1] Du 2003	Table 2, p. 4, row 7 report
1816	liq. + Au2Hf->Au3Hf	liq.: Hf 0.23; Au2Hf: Hf 0.3; Au3Hf: Au 0.75, Hf 0.25	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 8 report
1793	congruent melting: liq.->AuHf2	liq.: Hf 0.67; AuHf2: Au 0.333333, Hf 0.666667	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 24 report
1793	congruent melting: liq.->AuHf2	liq.: Hf 0.6667; AuHf2: Au 0.333333, Hf 0.666667	model	[1] Du 2003	Table 2, p. 4, row 23 report
1786	Au2Hf+βAuHf->Au10Hf7	Au2Hf: Hf 0.3249; βAuHf: Hf 0.469; Au10Hf7: Au 0.588235, Hf 0.411765	model	[1] Du 2003	Table 2, p. 4, row 13 report
1786	Au2Hf+βAuHf->Au10Hf7	Au2Hf: Hf 0.33; βAuHf: Hf 0.45; Au10Hf7: Au 0.588235, Hf 0.411765	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 14 report
1765	eutectic: liq.->βAuHf+AuHf2	liq.: Hf 0.62; βAuHf: Hf 0.5; AuHf2: Au 0.333333, Hf 0.666667	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 20 report
1761	eutectic: liq.->βAuHf+AuHf2	liq.: Hf 0.6239; βAuHf: Hf 0.4998; AuHf2: Au 0.333333, Hf 0.666667	model	[1] Du 2003	Table 2, p. 4, row 19 report
1677	eutectic: liq.->AuHf2+bcc(Hf)	liq.: Hf 0.7498; AuHf2: Au 0.333333, Hf 0.666667; bcc(Hf): Hf 0.8709	model	[1] Du 2003	Table 2, p. 4, row 25 report
1670	eutectic: liq.->AuHf2+bcc(Hf)	liq.: Hf 0.8; AuHf2: Au 0.333333, Hf 0.666667; bcc(Hf): Hf 0.86	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 26 report
1571	liq. + Au3Hf->Au4Hf	liq.: Hf 0.1542; Au3Hf: Au 0.75, Hf 0.25; Au4Hf: Au 0.8, Hf 0.2	model	[1] Du 2003	Table 2, p. 4, row 5 report
1571	liq. + Au3Hf->Au4Hf	liq.: Hf 0.15; Au3Hf: Au 0.75, Hf 0.25; Au4Hf: Au 0.8, Hf 0.2	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 6 report
1559	bcc(Hf)->AuHf2+hcp(Hf)	bcc(Hf): Hf 0.8818; AuHf2: Au 0.333333, Hf 0.666667; hcp(Hf): Hf 0.9715	model	[1] Du 2003	Table 2, p. 4, row 27 report
1559	bcc(Hf)->AuHf2+hcp(Hf)	bcc(Hf): Hf 0.89; AuHf2: Au 0.333333, Hf 0.666667	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 28 report
1418	liq. + Au4Hf->Au5Hf	liq.: Hf 0.1091; Au4Hf: Au 0.8, Hf 0.2; Au5Hf: Hf 0.154	model	[1] Du 2003	Table 2, p. 4, row 3 report
1418	liq. + Au4Hf->Au5Hf	liq.: Hf 0.1; Au4Hf: Au 0.8, Hf 0.2; Au5Hf: Hf 0.166	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 4 report
1387	βAuHf+AuHf2->αAuHf	βAuHf: Hf 0.5; AuHf2: Au 0.333333, Hf 0.666667; αAuHf: Hf 0.51	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 22 report
1387	βAuHf+AuHf2->αAuHf	βAuHf: Hf 0.4999; AuHf2: Au 0.333333, Hf 0.666667; αAuHf: Hf 0.4999	model	[1] Du 2003	Table 2, p. 4, row 21 report
1373	liq. + Au5Hf->fcc(Au)	liq.: Hf 0.07; Au5Hf: Hf 0.14; fcc(Au): Hf 0.08	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 2 report
1373	liq. + Au5Hf->fcc(Au)	liq.: Hf 0.0899; Au5Hf: Hf 0.1465; fcc(Au): Hf 0.0929	model	[1] Du 2003	Table 2, p. 4, row 1 report
1304	βAuHf->Au10Hf7+αAuHf	βAuHf: Hf 0.47; Au10Hf7: Au 0.588235, Hf 0.411765; αAuHf: Hf 0.48	experimental	[1] Du 2003 cites Lomello-Tafin 2000 doi	Table 2, p. 4, row 18 report
1304	βAuHf->Au10Hf7+αAuHf	βAuHf: Hf 0.4706; Au10Hf7: Au 0.588235, Hf 0.411765; αAuHf: Hf 0.4753	model	[1] Du 2003	Table 2, p. 4, row 17 report

Sources

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

Zhenmin Du, Lisha Yang, Thermodynamic assessment of the Au–Hf system, Journal of Alloys and Compounds 353, 213-216 (2003). doi:10.1016/s0925-8388(02)01293-8

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). doi:10.5281/zenodo.23735569
R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi: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). doi: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). doi: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.

@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}
}