Au–Zn system

40 accepted literature values from 1 paper(s) (experimental 21, model 19); 1 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (15) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	21
model	19

Accepted values by property group
Property group	Values
invariant reaction	24
phase transition	8
formation	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.

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
AuZn-03Liu.tdb	H.S. Liu, K. Ishida, Z.P. Jin, Y. Du, Intermetallics, 11, 987-94(2003). doi:10.1016/S0966-9795(03)00115-8	`3f49fe4af92b316f8926fd10020aff767d8b1d9bda94ac60c005ed29c49333a3`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
AuZn-03Liu.tdb	954.8	FCC_A1 (x(Zn) 0.34554) + LIQUID (x(Zn) 0.36111) + AUZN_B2 (x(Zn) 0.39724)
AuZn-03Liu.tdb	954.8	FCC_A1 (x(Zn) 0.34554) + LIQUID (x(Zn) 0.36111) + AUZN_B2 (x(Zn) 0.39724)
AuZn-03Liu.tdb	946.36	AUZN_B2 (x(Zn) 0.57227) + LIQUID (x(Zn) 0.62496) + AU4ZN9_D82 (x(Zn) 0.64654)
AuZn-03Liu.tdb	946.36	AUZN_B2 (x(Zn) 0.57227) + LIQUID (x(Zn) 0.62496) + AU4ZN9_D82 (x(Zn) 0.64654)
AuZn-03Liu.tdb	857.88	AU4ZN9_D82 (x(Zn) 0.74043) + AUZN4 (x(Zn) 0.80123) + LIQUID (x(Zn) 0.81897)
AuZn-03Liu.tdb	794.76	AU4ZN9_D82 (x(Zn) 0.74205) + AUZN3 (x(Zn) 0.75) + AUZN4 (x(Zn) 0.80019)
AuZn-03Liu.tdb	762.99	AUZN4 (x(Zn) 0.84616) + HCP_IM_A3 (x(Zn) 0.88) + LIQUID (x(Zn) 0.92663)
AuZn-03Liu.tdb	715.8	HCP_IM_A3 (x(Zn) 0.90246) + HCP_A3 (x(Zn) 0.95349) + LIQUID (x(Zn) 0.96482)
AuZn-03Liu.tdb	674.34	AU3ZN_HT (x(Zn) 0.27038) + FCC_A1 (x(Zn) 0.28335) + AUZN_B2 (x(Zn) 0.3688)
AuZn-03Liu.tdb	674.34	AU3ZN_HT (x(Zn) 0.27038) + FCC_A1 (x(Zn) 0.28335) + AUZN_B2 (x(Zn) 0.3688)
AuZn-03Liu.tdb	578.49	AU3ZN_HT (x(Zn) 0.28755) + AU5ZN3 (x(Zn) 0.375) + AUZN_B2 (x(Zn) 0.39919)
AuZn-03Liu.tdb	572.77	FCC_A1 (x(Zn) 0.16052) + AU4ZN (x(Zn) 0.18568) + AU3ZN_HT (x(Zn) 0.22039)
AuZn-03Liu.tdb	452.88	AUZN_B2 (x(Zn) 0.5467) + AU44ZN56 (x(Zn) 0.56) + AU4ZN9_D82 (x(Zn) 0.66127)
AuZn-03Liu.tdb	452.88	AUZN_B2 (x(Zn) 0.5467) + AU44ZN56 (x(Zn) 0.56) + AU4ZN9_D82 (x(Zn) 0.66127)
AuZn-03Liu.tdb	443.02	AUZN4 (x(Zn) 0.84096) + AU3ZN17 (x(Zn) 0.85) + HCP_IM_A3 (x(Zn) 0.86866)
AuZn-03Liu.tdb	307.05	AUZN3 (x(Zn) 0.75) + AUZN4 (x(Zn) 0.82698) + AU3ZN17 (x(Zn) 0.85)
AuZn-03Liu.tdb	307.05	AUZN3 (x(Zn) 0.75) + AUZN4 (x(Zn) 0.82699) + AU3ZN17 (x(Zn) 0.85)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Au–Zn system (24)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
957	eutectic: L -> (Au) + β'	L: Zn 0.34; β': Zn 0.5	experimental	[1] Liu 2003 cites Pemsler 1971 doi	Table 4, p. 7, row 10 report
956	eutectic: L -> (Au) + β'	L: Zn 0.36; (Au): Zn 0.335; β': Zn 0.395	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 9 report
955	eutectic: L -> (Au) + β'	L: Zn 0.36; (Au): Zn 0.345; β': Zn 0.395	model	[1] Liu 2003	Table 4, p. 7, row 11 report
946	eutectic: L + β' -> γ (L -> β' + γ)	L: Zn 0.625; β': Zn 0.572; γ: Zn 0.646	model	[1] Liu 2003	Table 4, p. 7, row 21 report
932	eutectic: L + β' -> γ (L -> β' + γ)	L: Zn 0.615; β': Zn 0.5; γ: Zn 0.692308	experimental	[1] Liu 2003 cites Pemsler 1971 doi	Table 4, p. 7, row 20 report
927	eutectic: L + β' -> γ (L -> β' + γ)	L: Zn 0.63; β': Zn 0.57; γ: Zn 0.625	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 19 report
858	peritectic: L + γ -> γ3	L: Zn 0.845; γ: Zn 0.76; γ3: Zn 0.795	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 22 report
855	peritectic: L + γ -> γ3	L: Zn 0.821; γ: Zn 0.741; γ3: Zn 0.793	model	[1] Liu 2003	Table 4, p. 7, row 23 report
794	peritectoid: γ + γ3 -> γ2	γ: Zn 0.742; γ3: Zn 0.79; γ2: Zn 0.75	model	[1] Liu 2003	Table 4, p. 7, row 25 report
793	peritectoid: γ + γ3 -> γ2	γ: Zn 0.74; γ3: Zn 0.78; γ2: Zn 0.75	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 24 report
763	peritectic: L + γ3 -> ϵ	L: Zn 0.917; γ3: Zn 0.833; ϵ: Zn 0.875	model	[1] Liu 2003	Table 4, p. 7, row 27 report
763	peritectic: L + γ3 -> ϵ	L: Zn 0.92; γ3: Zn 0.835; ϵ: Zn 0.88	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 26 report
718	peritectic: L + ϵ -> (Zn)	L: Zn 0.958; ϵ: Zn 0.898; (Zn): Zn 0.948	model	[1] Liu 2003	Table 4, p. 7, row 31 report
711	peritectic: L + ϵ -> (Zn)	L: Zn 0.96; ϵ: Zn 0.89; (Zn): Zn 0.925	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 30 report
676	eutectoid: (Au) -> α1 + β'	(Au): Zn 0.295; α1: Zn 0.27; β': Zn 0.38	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 7 report
670	eutectoid: (Au) -> α1 + β'	(Au): Zn 0.292; α1: Zn 0.275; β': Zn 0.383	model	[1] Liu 2003	Table 4, p. 7, row 8 report
578	peritectoid: α1 + β' -> Au5Zn3	α1: Zn 0.291; β': Zn 0.415; Au5Zn3: Zn 0.375	model	[1] Liu 2003	Table 4, p. 7, row 13 report
573	peritectoid: (Au) + α1 -> α3	(Au): Zn 0.18; α1: Zn 0.215; α3: Zn 0.19	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 1 report
573	peritectoid: α1 + β' -> Au5Zn3	α1: Zn 0.29; β': Zn 0.405; Au5Zn3: Zn 0.375	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 12 report
572	peritectoid: (Au) + α1 -> α3	(Au): Zn 0.16; α1: Zn 0.22; α3: Zn 0.186	model	[1] Liu 2003	Table 4, p. 7, row 2 report
458	peritectoid: ε + γ3 ε'	γ3: Zn 0.8; ε': Zn 0.85	model	[1] Liu 2003	Table 4, p. 7, row 29 report
455	peritectoid: β' + γ -> δ	β': Zn 0.545; γ: Zn 0.641; δ: Zn 0.56	model	[1] Liu 2003	Table 4, p. 7, row 18 report
453	peritectoid: β' + γ -> δ	β': Zn 0.525; γ: Zn 0.655; δ: Zn 0.56	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 17 report
443	peritectoid: ε + γ3 ε'	γ3: Zn 0.825; ε': Zn 0.85	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 28 report

Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from dft_parity.json.

Enthalpies of formation, Au–Zn system (8)
Phase	Value	T (K)	Class	Source	Location
α2	-19.009 kJ/mol (basis unstated)		model	[1] Liu 2003	Table 3, p. 5, row 10 report
α2	-17.061 kJ/mol (basis unstated)	298.15	experimental	[1] Liu 2003 cites Carpenter 1967	Table 3, p. 5, row 9 report
α₁	-16.944 kJ/mol (basis unstated)		model	[1] Liu 2003	Table 3, p. 5, row 8 report
α₁	-16.73 kJ/mol (basis unstated)	298.15	experimental	[1] Liu 2003 cites Carpenter 1967	Table 3, p. 5, row 7 report
β'	-25.816 kJ/mol (basis unstated)	298.15	experimental	[1] Liu 2003 cites Carpenter 1967	Table 3, p. 5, row 5 report
β'	-25.81 kJ/mol (basis unstated)		model	[1] Liu 2003	Table 3, p. 5, row 6 report
β’	-26.274 kJ/mol (basis unstated)		model	[1] Liu 2003	Table 3, p. 5, row 4 report
β’	-25.711 kJ/mol (basis unstated)	298.15	experimental	[1] Liu 2003 cites Carpenter 1967	Table 3, p. 5, row 3 report

Other properties

Phase transition (8)

Phase transition, Au–Zn system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	540 K	540	congruent transformation: α1 -> α2 α1: Zn 0.25; α2: Zn 0.25	model	[1] Liu 2003	Table 4, p. 7, row 6 report
Phase transition	543 K	543	congruent transformation: α1 -> α2 α1: Zn 0.25; α2: Zn 0.25	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 5 report
Phase transition	681 K	681	congruent transformation: (Au) -> α1 (Au): Zn 0.256; α1: Zn 0.25	model	[1] Liu 2003	Table 4, p. 7, row 4 report
Phase transition	693 K	693	congruent transformation: (Au) -> α1 (Au): Zn 0.25; α1: Zn 0.25	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 3 report
Phase transition	954 K	954	congruent melting: Lγ L: Zn 0.667; γ: Zn 0.692308	model	[1] Liu 2003	Table 4, p. 7, row 32 report
Phase transition	1008 K	1008	congruent melting: L -> β' L: Zn 0.491; β': Zn 0.5	model	[1] Liu 2003	Table 4, p. 7, row 16 report
Phase transition	1024 K	1024	congruent melting: L -> β' L: Zn 0.5; β': Zn 0.5	experimental	[1] Liu 2003 cites Okamoto 1989 doi	Table 4, p. 7, row 14 report
Phase transition	1031 K	1031	congruent melting: L -> β' L: Zn 0.485; β': Zn 0.5	experimental	[1] Liu 2003 cites Pemsler 1971 doi	Table 4, p. 7, row 15 report

Sources

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

H.S. Liu, K. Ishida, Z.P. Jin, Y. Du, Thermodynamic assessment of the Au–Zn binary system, Intermetallics 11, 987-994 (2003). doi:10.1016/s0966-9795(03)00115-8

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}
}