Mo–Pd system

47 accepted literature values from 1 paper(s) (experimental 32, model 15); 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 (4) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	32
model	15

Accepted values by property group
Property group	Values
invariant reaction	9
phase transition	2
phase equilibrium	3
activity / EMF / Gibbs energy	33

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
MoPd-00Gho.tdb	G. Ghosh, G.B. Olson, J. Phase Equilib., 21, 32-39(2000). doi:10.1361/105497100770340390	`fe2b737fc07909c40b865119c7d66f91b15986b3b598db3b6a1dbbd125af0bd5`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
MoPd-00Gho.tdb	2000.93	BCC_A2 (x(Pd) 0.04805) + HCP_A3 (x(Pd) 0.50157) + LIQUID (x(Pd) 0.50649)
MoPd-00Gho.tdb	1984.36	HCP_A3 (x(Pd) 0.53781) + LIQUID (x(Pd) 0.54774) + FCC_A1 (x(Pd) 0.55905)
MoPd-00Gho.tdb	1654.34	BCC_A2 (x(Pd) 0.04043) + HCP_A3 (x(Pd) 0.52741) + FCC_A1 (x(Pd) 0.58298)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Mo–Pd system (9)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
2018	L + (Mo) -> ε	L: Pd 0.53; ε: Pd 0.52	experimental	[1] Ghosh 2000 cites Kleykamp 1989 doi	Table 2, p. 6, row 2 report
2013	L + (Mo) -> ε	L: Pd 0.5748; (Mo): Pd 0.07; ε: Pd 0.5186	experimental	[1] Ghosh 2000 cites Haworth 1958	Table 2, p. 6, row 1 report
2002	L + (Mo) -> ε	L: Pd 0.5058; (Mo): Pd 0.0482; ε: Pd 0.5011	model	[1] Ghosh 2000	Table 2, p. 6, row 3 report
1984	eutectic: L -> ε + (Pd)	L: Pd 0.5482; ε: Pd 0.5383; (Pd): Pd 0.5594	model	[1] Ghosh 2000	Table 2, p. 6, row 5 report
1973	eutectic: L -> ε + (Pd)	L: Pd 0.54; ε: Pd 0.52; (Pd): Pd 0.57	experimental	[1] Ghosh 2000 cites Anderson 1964 doi	Table 2, p. 6, row 4 report
1698	ε -> (Mo) + (Pd)	ε: Pd 0.55; (Mo): Pd 0.02; (Pd): Pd 0.58	experimental	[1] Ghosh 2000 cites Kleykamp 1989 doi	Table 2, p. 6, row 6 report
1654	ε -> (Mo) + (Pd)	ε: Pd 0.5274; (Mo): Pd 0.0404; (Pd): Pd 0.583	model	[1] Ghosh 2000	Table 2, p. 6, row 9 report
1653	ε -> (Mo) + (Pd)	ε: Pd 0.524; (Mo): Pd 0.025; (Pd): Pd 0.6	experimental	[1] Ghosh 2000 cites Anderson 1964 doi	Table 2, p. 6, row 7 report
1643	ε -> (Mo) + (Pd)	ε: Pd 0.5344; (Mo): Pd 0.1367; (Pd): Pd 0.7	experimental	[1] Ghosh 2000 cites Savitskii 1964	Table 2, p. 6, row 8 report

Other properties

Phase transition (2)

Phase transition, Mo–Pd system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	2032 K	2032	L -> (Pd) L: Pd 0.6353; (Pd): Pd 0.6353	model	[1] Ghosh 2000	Table 2, p. 6, row 11 report
Phase transition	2033 K	2033	L -> (Pd) L: Pd 0.61; (Pd): Pd 0.61	experimental	[1] Ghosh 2000 cites Anderson 1964 doi	Table 2, p. 6, row 10 report

Phase equilibrium (3)

Phase equilibrium, Mo–Pd system
Property	T (K)	Phases / composition	Class	Source	Location	Quote
Phase assemblage	1143	(Mo) + (Pd) alloy: Pd 0.53	experimental	[1] Ghosh 2000 cites Kleykamp 1989 doi	p. 4 report	For example, Kleykamp[22] annealed a Mo-53at.%Pd alloy at 1143 K for 42 days and a Mo-60 at.% Pd alloy at 1173 K for 38 days and found only (Mo) and (Pd) phases.
Phase assemblage	1173	(Mo) + (Pd) alloy: Pd 0.47	experimental	[1] Ghosh 2000 cites Gurler 1991 doi	p. 4 report	Gürler and Pratt[26] annealed a Mo-47 at.% Pd alloy, after rapid solidification, at 1173 K for 188 h, and found only (Mo) and (Pd) phases.
Phase assemblage	1173	(Mo) + (Pd) alloy: Pd 0.6	experimental	[1] Ghosh 2000 cites Kleykamp 1989 doi	p. 4 report	For example, Kleykamp[22] annealed a Mo-53at.%Pd alloy at 1143 K for 42 days and a Mo-60 at.% Pd alloy at 1173 K for 38 days and found only (Mo) and (Pd) phases.

Activity / EMF / Gibbs energy (33)

Activity / EMF / Gibbs energy, Mo–Pd system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Gibbs energy printed: ΔG	-5631 J/mol	1200	fcc alloy: Mo 0.1, Pd 0.9	model	[1] Ghosh 2000	Table 3, p. 7, row 12 report
Gibbs energy printed: ΔG	-8981 J/mol	1200	fcc alloy: Mo 0.3, Pd 0.7	experimental	[1] Ghosh 2000 cites Gurler 1993	Table 3, p. 7, row 23 report
Gibbs energy printed: ΔG	-7764 J/mol	1200	fcc alloy: Mo 0.15, Pd 0.85	experimental	[1] Ghosh 2000 cites Gurler 1993	Table 3, p. 7, row 14 report
Gibbs energy printed: ΔG	-1954 J/mol	1200	fcc alloy: Mo 0.025, Pd 0.975	model	[1] Ghosh 2000	Table 3, p. 7, row 3 report
Gibbs energy printed: ΔG	-10400 J/mol	1200	fcc alloy: Mo 0.25, Pd 0.75	experimental	[1] Ghosh 2000 cites Kleykamp 1989 doi	Table 3, p. 7, row 19 report
Gibbs energy printed: ΔG	-6142 J/mol	1200	fcc alloy: Mo 0.1, Pd 0.9	experimental	[1] Ghosh 2000 cites Gurler 1993	Table 3, p. 7, row 11 report
Gibbs energy printed: ΔG	-8253 J/mol	1200	fcc alloy: Mo 0.25, Pd 0.75	model	[1] Ghosh 2000	Table 3, p. 7, row 21 report
Gibbs energy printed: ΔG	-7934 J/mol	1200	fcc alloy: Mo 0.2, Pd 0.8	model	[1] Ghosh 2000	Table 3, p. 7, row 18 report
Gibbs energy printed: ΔG	-3436 J/mol	1200	fcc alloy: Mo 0.05, Pd 0.95	model	[1] Ghosh 2000	Table 3, p. 7, row 6 report
Gibbs energy printed: ΔG	-8113 J/mol	1200	fcc alloy: Mo 0.3, Pd 0.7	model	[1] Ghosh 2000	Table 3, p. 7, row 24 report
Gibbs energy printed: ΔG	-7200 J/mol	1200	fcc alloy: Mo 0.1, Pd 0.9	experimental	[1] Ghosh 2000 cites Kleykamp 1989 doi	Table 3, p. 7, row 10 report
Gibbs energy printed: ΔG	-7089 J/mol	1200	fcc alloy: Mo 0.15, Pd 0.85	model	[1] Ghosh 2000	Table 3, p. 7, row 15 report
Gibbs energy printed: ΔG	-8719 J/mol	1200	fcc alloy: Mo 0.2, Pd 0.8	experimental	[1] Ghosh 2000 cites Gurler 1993	Table 3, p. 7, row 17 report
Gibbs energy printed: ΔG	-10600 J/mol	1200	fcc alloy: Mo 0.3, Pd 0.7	experimental	[1] Ghosh 2000 cites Kleykamp 1989 doi	Table 3, p. 7, row 22 report
Gibbs energy printed: ΔG	-9800 J/mol	1200	fcc alloy: Mo 0.2, Pd 0.8	experimental	[1] Ghosh 2000 cites Kleykamp 1989 doi	Table 3, p. 7, row 16 report
Gibbs energy printed: ΔG	-5042 J/mol	1200	fcc alloy: Mo 0.075, Pd 0.925	experimental	[1] Ghosh 2000 cites Gurler 1993	Table 3, p. 7, row 8 report
Gibbs energy printed: ΔG	-2107 J/mol	1200	fcc alloy: Mo 0.025, Pd 0.975	experimental	[1] Ghosh 2000 cites Gurler 1993	Table 3, p. 7, row 2 report
Gibbs energy printed: ΔG	-6300 J/mol	1200	fcc alloy: Mo 0.075, Pd 0.925	experimental	[1] Ghosh 2000 cites Kleykamp 1989 doi	Table 3, p. 7, row 7 report
Gibbs energy printed: ΔG	-8800 J/mol	1200	fcc alloy: Mo 0.15, Pd 0.85	experimental	[1] Ghosh 2000 cites Kleykamp 1989 doi	Table 3, p. 7, row 13 report
Gibbs energy printed: ΔG	-3000 J/mol	1200	fcc alloy: Mo 0.025, Pd 0.975	experimental	[1] Ghosh 2000 cites Kleykamp 1989 doi	Table 3, p. 7, row 1 report
Gibbs energy printed: ΔG	-3714 J/mol	1200	fcc alloy: Mo 0.05, Pd 0.95	experimental	[1] Ghosh 2000 cites Gurler 1993	Table 3, p. 7, row 5 report
Gibbs energy printed: ΔG	-4634 J/mol	1200	fcc alloy: Mo 0.075, Pd 0.925	model	[1] Ghosh 2000	Table 3, p. 7, row 9 report
Gibbs energy printed: ΔG	-9100 J/mol	1200	fcc alloy: Mo 0.25, Pd 0.75	experimental	[1] Ghosh 2000 cites Gurler 1993	Table 3, p. 7, row 20 report
Gibbs energy printed: ΔG	-5000 J/mol	1200	fcc alloy: Mo 0.05, Pd 0.95	experimental	[1] Ghosh 2000 cites Kleykamp 1989 doi	Table 3, p. 7, row 4 report
Gibbs energy printed: ΔG	-7648 J/mol	1273	fcc alloy: Mo 0.13, Pd 0.87	experimental	[1] Ghosh 2000 cites Gurler 1993	Table 3, p. 7, row 26 report
Gibbs energy printed: ΔG	-9551 J/mol	1273	fcc alloy: Mo 0.215, Pd 0.785	experimental	[1] Ghosh 2000 cites Gurler 1993	Table 3, p. 7, row 29 report
Gibbs energy printed: ΔG	-7055 J/mol	1273	fcc alloy: Mo 0.13, Pd 0.87	model	[1] Ghosh 2000	Table 3, p. 7, row 27 report
Gibbs energy printed: ΔG	-9623 J/mol	1273	fcc alloy: Mo 0.215, Pd 0.785	experimental	[1] Ghosh 2000 cites Yamawaki 1980	Table 3, p. 7, row 28 report
Gibbs energy printed: ΔG	-7950 J/mol	1273	fcc alloy: Mo 0.33, Pd 0.67	experimental	[1] Ghosh 2000 cites Yamawaki 1980	Table 3, p. 7, row 31 report
Gibbs energy printed: ΔG	-9581 J/mol	1273	fcc alloy: Mo 0.33, Pd 0.67	experimental	[1] Ghosh 2000 cites Gurler 1993	Table 3, p. 7, row 32 report
Gibbs energy printed: ΔG	-7531 J/mol	1273	fcc alloy: Mo 0.13, Pd 0.87	experimental	[1] Ghosh 2000 cites Yamawaki 1980	Table 3, p. 7, row 25 report
Gibbs energy printed: ΔG	-8749 J/mol	1273	fcc alloy: Mo 0.215, Pd 0.785	model	[1] Ghosh 2000	Table 3, p. 7, row 30 report
Gibbs energy printed: ΔG	-8677 J/mol	1273	fcc alloy: Mo 0.33, Pd 0.67	model	[1] Ghosh 2000	Table 3, p. 7, row 33 report

Sources

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

G. Ghosh, G. B. Olson, Thermodynamic modeling of the Cr-Pd and Mo-Pd systems, JPE 21, 32-39 (2000). doi:10.1361/105497100770340390

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}
}