Fe–Pd system

25 accepted literature values from 1 paper(s) (experimental 13, model 12); 1 calculated phase diagram(s). 2 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 (6) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	13
model	12

Accepted values by property group
Property group	Values
invariant reaction	21
formation	4

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
FePd-99Gho-LB.tdb	G. Ghosh, C. Kantner, G.B. Olson, J. Phase Equilib., 20, 295-308(1999). doi:10.1361/105497199770335811	`44714d50700b1a28a8ad1b6936558770de176bbf6f8c72c21311a0c71ec9cd02`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
FePd-99Gho-LB.tdb	1753.43	BCC_A2 (x(Pd) 0.03877) + FCC_A1 (x(Pd) 0.04336) + LIQUID (x(Pd) 0.07577)
FePd-99Gho-LB.tdb	1087.42	BCC_A2 (x(Pd) 0.02566) + FCC_A1#2 (x(Pd) 0.05963) + FCC_A1 (x(Pd) 0.24012)
FePd-99Gho-LB.tdb	1037.12	FEPD_L10 (x(Pd) 0.62224) + FCC_A1 (x(Pd) 0.64422) + FEPD3_L12 (x(Pd) 0.6833)
FePd-99Gho-LB.tdb	898.04	BCC_A2 (x(Pd) 0.00603) + FCC_A1 (x(Pd) 0.39972) + FEPD_L10 (x(Pd) 0.48925)
FePd-99Gho-LB.tdb	322.8	FEPD3_L12 (x(Pd) 0.84322) + FEPD3_L12#2 (x(Pd) 0.88493) + FCC_A1 (x(Pd) 0.9472)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Fe–Pd system (21)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1753	L + (δFe) -> (γFe)	L: Pd 0.0757; (δFe): Pd 0.0387; (γFe): Pd 0.0433	model	[1] Ghosh 1999	Table 1, p. 5, row 2 report
1751	L + (δFe) -> (γFe)	L: Pd 0.065; (δFe): Pd 0.033; (γFe): Pd 0.037	experimental	[1] Ghosh 1999 cites Gibson 1958	Table 1, p. 5, row 1 report
1583	congruent melting: L -> γ	L: Pd 0.5; γ: Pd 0.5	experimental	[1] Ghosh 1999 cites Kubaschewski 1982	Table 1, p. 5, row 11 report
1582	congruent melting: L -> γ	L: Pd 0.4971; γ: Pd 0.4971	model	[1] Ghosh 1999	Table 1, p. 5, row 12 report
1173	γ -> γ1 + γ2		experimental	[1] Ghosh 1999 cites Raub 1963	Table 1, p. 5, row 13 report
1147	γ -> γ1 + γ2	γ: Pd 0.1406	model	[1] Ghosh 1999	Table 1, p. 5, row 14 report
1094	polymorphic: γ -> FePd3	γ: Pd 0.7305; FePd3: Fe 0.25, Pd 0.75	model	[1] Ghosh 1999	Table 1, p. 5, row 21 report
1093	polymorphic: γ -> FePd3	γ: Fe 0.25, Pd 0.75; FePd3: Fe 0.25, Pd 0.75	experimental	[1] Ghosh 1999 cites Raub 1963	Table 1, p. 5, row 19 report
1088	γ1 -> (αFe) + γ2	γ1: Pd 0.07; (αFe): Pd 0.0348; γ2: Pd 0.2348	experimental	[1] Ghosh 1999 cites Raub 1963	Table 1, p. 5, row 4 report
1087	γ1 -> (αFe) + γ2	γ1: Pd 0.0597; (αFe): Pd 0.0257; γ2: Pd 0.2401	model	[1] Ghosh 1999	Table 1, p. 5, row 5 report
1083	polymorphic: γ -> FePd3	γ: Pd 0.6596; FePd3: Fe 0.25, Pd 0.75	experimental	[1] Ghosh 1999 cites Takezawa 1987 doi	Table 1, p. 5, row 20 report
1073	γ1 -> (αFe) + γ2		experimental	[1] Ghosh 1999 cites Kussman 1963	Table 1, p. 5, row 3 report
1073	polymorphic: γ -> FePd3	γ: Pd 0.65; FePd3: Fe 0.25, Pd 0.75	experimental	[1] Ghosh 1999 cites Kussman 1963	Table 1, p. 5, row 18 report
1063	polymorphic: γ -> FePd	γ: Fe 0.5, Pd 0.5; FePd: Fe 0.5, Pd 0.5	experimental	[1] Ghosh 1999 cites Raub 1963	Table 1, p. 5, row 15 report
1060	polymorphic: γ -> FePd	γ: Pd 0.5808; FePd: Fe 0.5, Pd 0.5	model	[1] Ghosh 1999	Table 1, p. 5, row 17 report
1056	polymorphic: γ -> FePd	γ: Pd 0.5792; FePd: Fe 0.5, Pd 0.5	experimental	[1] Ghosh 1999 cites Takezawa 1987 doi	Table 1, p. 5, row 16 report
1037	γ -> FePd + FePd3	γ: Pd 0.6443; FePd: Pd 0.6222; FePd3: Pd 0.6833	model	[1] Ghosh 1999	Table 1, p. 5, row 10 report
1033	γ -> FePd + FePd3	γ: Pd 0.615; FePd: Fe 0.5, Pd 0.5; FePd3: Fe 0.25, Pd 0.75	experimental	[1] Ghosh 1999 cites Raub 1963	Table 1, p. 5, row 9 report
898	γ -> (αFe) + FePd	γ: Pd 0.3998; (αFe): Pd 0.0061; FePd: Pd 0.4893	model	[1] Ghosh 1999	Table 1, p. 5, row 8 report
878	γ -> (αFe) + FePd	γ: Pd 0.46; FePd: Pd 0.4833	experimental	[1] Ghosh 1999 cites Kussman 1963	Table 1, p. 5, row 6 report
873	γ -> (αFe) + FePd	γ: Pd 0.43; (αFe): Pd 0.0087; FePd: Pd 0.4696	experimental	[1] Ghosh 1999 cites Raub 1963	Table 1, p. 5, row 7 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, Fe–Pd system (4)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
FePd	FePd	-13.735 kJ/mol-atom	298.15	model	-6.145 (mp-aaaaaeex)	-6.376 (oqmd-116604)	[1] Ghosh 1999	Table 2, p. 7, row 1 report
FePd	FePd	-6 kJ/mol-atom	298.15	model	-6.145 (mp-aaaaaeex)	-6.376 (oqmd-116604)	[1] Ghosh 1999 cites F 1988	Table 2, p. 7, row 2 report
FePd3	FePd3	-22.01 kJ/mol-atom	298.15	model	-10.445 (mp-aaaabgif)	-10.407 (oqmd-30235)	[1] Ghosh 1999	Table 2, p. 7, row 3 report
FePd3	FePd3	-4 kJ/mol-atom	298.15	model	-10.445 (mp-aaaabgif)	-10.407 (oqmd-30235)	[1] Ghosh 1999 cites F 1988	Table 2, p. 7, row 4 report

Sources

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

G. Ghosh, C. Kantner, G. B. Olson, Thermodynamic modeling of the Pd-X (X=Ag, Co, Fe, Ni) systems, JPE 20, 295-308 (1999). doi:10.1361/105497199770335811

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}
}