Pd–Se system

65 accepted literature values from 1 paper(s) (experimental 40, model 19, unspecified 6); 1 calculated phase diagram(s). 16 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 (14) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	40
model	19
unspecified	6

Accepted values by property group
Property group	Values
invariant reaction	35
phase transition	7
formation	6
crystal structure	17

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
PdSe-14Bor.tdb	S. Bordier, A. Chocard, S. Gosse, J. Nucl. Mater., 451, 120-29(2014). doi:10.1016/j.jnucmat.2014.03.044	`e26c4eccbccb63c1866f1fb9d9ab959deb25021b2dc5d916d75d8f488f813525`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
PdSe-14Bor.tdb	1032.5	LIQUID#2 (x(Se) 0.4384) + PDSE2 (x(Se) 0.66667) + LIQUID (x(Se) 1)
PdSe-14Bor.tdb	1032.5	LIQUID#2 (x(Se) 0.43845) + PDSE2 (x(Se) 0.66667) + LIQUID (x(Se) 1)
PdSe-14Bor.tdb	954.58	LIQUID (x(Se) 0.42359) + PD17SE15 (x(Se) 0.46875) + PDSE2 (x(Se) 0.66667)
PdSe-14Bor.tdb	954.58	LIQUID (x(Se) 0.42329) + PD17SE15 (x(Se) 0.46875) + PDSE2 (x(Se) 0.66667)
PdSe-14Bor.tdb	954.58	LIQUID (x(Se) 0.42334) + PD17SE15 (x(Se) 0.46875) + PDSE2 (x(Se) 0.66667)
PdSe-14Bor.tdb	910.06	FCC_A1 (x(Se) 0.01181) + PD9SE2 (x(Se) 0.18182) + LIQUID (x(Se) 0.20016)
PdSe-14Bor.tdb	910.06	FCC_A1 (x(Se) 0.0118) + PD9SE2 (x(Se) 0.18182) + LIQUID (x(Se) 0.20014)
PdSe-14Bor.tdb	890.81	PD17SE15 (x(Se) 0.46875) + PDSE (x(Se) 0.5) + PDSE2 (x(Se) 0.66667)
PdSe-14Bor.tdb	818.06	PD9SE2 (x(Se) 0.18182) + PD4SE_HT (x(Se) 0.2) + LIQUID (x(Se) 0.23335)
PdSe-14Bor.tdb	818.06	PD9SE2 (x(Se) 0.18182) + PD4SE_HT (x(Se) 0.2) + LIQUID (x(Se) 0.23332)
PdSe-14Bor.tdb	811.27	PD4SE_HT (x(Se) 0.2) + PD7SE2 (x(Se) 0.22222) + LIQUID (x(Se) 0.23618)
PdSe-14Bor.tdb	811.27	PD4SE_HT (x(Se) 0.2) + PD7SE2 (x(Se) 0.22222) + LIQUID (x(Se) 0.23618)
PdSe-14Bor.tdb	800.35	PD4SE_HT (x(Se) 0.2) + PD4SE_LT (x(Se) 0.2) + PD7SE2 (x(Se) 0.22222)
PdSe-14Bor.tdb	800.35	PD9SE2 (x(Se) 0.18182) + PD4SE_HT (x(Se) 0.2) + PD4SE_LT (x(Se) 0.2)
PdSe-14Bor.tdb	703.97	PD7SE2 (x(Se) 0.22222) + PD34SE11 (x(Se) 0.24444) + LIQUID (x(Se) 0.2811)
PdSe-14Bor.tdb	703.97	PD7SE2 (x(Se) 0.22222) + PD34SE11 (x(Se) 0.24444) + LIQUID (x(Se) 0.28109)
PdSe-14Bor.tdb	703.97	PD7SE2 (x(Se) 0.22222) + PD34SE11 (x(Se) 0.24444) + LIQUID (x(Se) 0.28116)
PdSe-14Bor.tdb	687.31	LIQUID (x(Se) 0.31384) + PD7SE4 (x(Se) 0.36364) + PD17SE15 (x(Se) 0.46875)
PdSe-14Bor.tdb	687.31	LIQUID (x(Se) 0.314) + PD7SE4 (x(Se) 0.36364) + PD17SE15 (x(Se) 0.46875)
PdSe-14Bor.tdb	687.31	LIQUID (x(Se) 0.31377) + PD7SE4 (x(Se) 0.36364) + PD17SE15 (x(Se) 0.46875)
PdSe-14Bor.tdb	673.64	FCC_A1 (x(Se) 0.0158) + PD9SE2 (x(Se) 0.18182) + PD4SE_LT (x(Se) 0.2)
PdSe-14Bor.tdb	673.64	FCC_A1 (x(Se) 0.0158) + PD9SE2 (x(Se) 0.18182) + PD4SE_LT (x(Se) 0.2)
PdSe-14Bor.tdb	659.21	PD34SE11 (x(Se) 0.24444) + LIQUID (x(Se) 0.29817) + PD7SE4 (x(Se) 0.36364)
PdSe-14Bor.tdb	659.21	PD34SE11 (x(Se) 0.24444) + LIQUID (x(Se) 0.29806) + PD7SE4 (x(Se) 0.36364)
PdSe-14Bor.tdb	494	PDSE2 (x(Se) 0.66667) + HEXAGONAL_A8 (x(Se) 1) + LIQUID (x(Se) 1)
PdSe-14Bor.tdb	468.56	PD17SE15 (x(Se) 0.46875) + PDSE (x(Se) 0.5) + PDSE2 (x(Se) 0.66667)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Pd–Se system (35)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
955	Liq + PdSe2 -> Pd17Se15	PdSe2: Se 0.666667; Pd17Se15: Se 0.46875	model	[1] Bordier 2014	Table 4, p. 8, row 22 report
953	Liq + PdSe2 -> Pd17Se15	PdSe2: Se 0.666667; Pd17Se15: Se 0.46875	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 4, p. 8, row 21 report
910	eutectic: Liq -> FCC + Pd9Se2	Pd9Se2: Se 0.181818	model	[1] Bordier 2014	Table 4, p. 8, row 4 report
908	eutectic: Liq -> FCC + Pd9Se2	Pd9Se2: Se 0.181818	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 4, p. 8, row 2 report
908	eutectic: Liq -> FCC + Pd9Se2	Pd9Se2: Se 0.181818	experimental	[1] Bordier 2014	Table 4, p. 8, row 3 report
898	eutectic: Liq -> FCC + Pd9Se2	Pd9Se2: Se 0.181818	experimental	[1] Bordier 2014 cites Takabatake 1987 doi	Table 4, p. 8, row 1 report
893	Pd17Se15 + PdSe2 -> PdSe	Pd17Se15: Se 0.46875; PdSe2: Se 0.666667; PdSe: Se 0.5	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 4, p. 8, row 23 report
892	Pd17Se15 + PdSe2 -> PdSe	Pd17Se15: Se 0.46875; PdSe2: Se 0.666667; PdSe: Se 0.5	model	[1] Bordier 2014	Table 4, p. 8, row 24 report
818	Liq + Pd9Se2 -> β-Pd4Se	Pd9Se2: Se 0.181818; β-Pd4Se: Se 0.2	model	[1] Bordier 2014	Table 4, p. 8, row 8 report
817	Liq + Pd9Se2 -> β-Pd4Se	Pd9Se2: Se 0.181818; β-Pd4Se: Se 0.2	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 4, p. 8, row 6 report
816	Liq + Pd9Se2 -> β-Pd4Se	Pd9Se2: Se 0.181818; β-Pd4Se: Se 0.2	experimental	[1] Bordier 2014	Table 4, p. 8, row 7 report
811	Liq + β-Pd4Se -> Pd7Se2	β-Pd4Se: Se 0.2; Pd7Se2: Se 0.222222	model	[1] Bordier 2014	Table 4, p. 8, row 12 report
811	Liq + β-Pd4Se -> Pd7Se2	β-Pd4Se: Se 0.2; Pd7Se2: Se 0.222222	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 4, p. 8, row 10 report
808	Liq + β-Pd4Se -> Pd7Se2	β-Pd4Se: Se 0.2; Pd7Se2: Se 0.222222	experimental	[1] Bordier 2014	Table 4, p. 8, row 11 report
803	Liq + Pd9Se2 -> β-Pd4Se	Pd9Se2: Se 0.181818; β-Pd4Se: Se 0.2	experimental	[1] Bordier 2014 cites Takabatake 1987 doi	Table 4, p. 8, row 5 report
796	Liq + β-Pd4Se -> Pd7Se2	β-Pd4Se: Se 0.2; Pd7Se2: Se 0.222222	experimental	[1] Bordier 2014 cites Takabatake 1987 doi	Table 4, p. 8, row 9 report
706	Liq + Pd7Se2 -> Pd34Se11	Pd7Se2: Se 0.222222; Pd34Se11: Se 0.244444	experimental	[1] Bordier 2014	Table 4, p. 8, row 15 report
704	Liq + Pd7Se2 -> Pd34Se11	Pd7Se2: Se 0.222222; Pd34Se11: Se 0.244444	model	[1] Bordier 2014	Table 4, p. 8, row 16 report
703	Liq + Pd7Se2 -> Pd34Se11	Pd7Se2: Se 0.222222; Pd34Se11: Se 0.244444	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 4, p. 8, row 14 report
698	Liq + Pd7Se2 -> Pd34Se11	Pd7Se2: Se 0.222222; Pd34Se11: Se 0.244444	experimental	[1] Bordier 2014 cites Takabatake 1987 doi	Table 4, p. 8, row 13 report
688	Liq + Pd17Se15 -> Pd7Se4	Pd17Se15: Se 0.46875; Pd7Se4: Se 0.363636	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 4, p. 8, row 18 report
688	Liq + Pd17Se15 -> Pd7Se4	Pd17Se15: Se 0.46875; Pd7Se4: Se 0.363636	experimental	[1] Bordier 2014	Table 4, p. 8, row 19 report
687	Liq + Pd17Se15 -> Pd7Se4	Pd17Se15: Se 0.46875; Pd7Se4: Se 0.363636	model	[1] Bordier 2014	Table 4, p. 8, row 20 report
683	Liq + Pd17Se15 -> Pd7Se4	Pd17Se15: Se 0.46875; Pd7Se4: Se 0.363636	experimental	[1] Bordier 2014 cites Takabatake 1987 doi	Table 4, p. 8, row 17 report
674	Pd9Se2 -> FCC + α-Pd4Se	Pd9Se2: Se 0.181818; α-Pd4Se: Se 0.2	model	[1] Bordier 2014	Table 4, p. 8, row 38 report
670	Pd9Se2 -> FCC + α-Pd4Se	Pd9Se2: Se 0.181818; α-Pd4Se: Se 0.2	experimental	[1] Bordier 2014	Table 4, p. 8, row 37 report
663	Pd9Se2 -> FCC + α-Pd4Se	Pd9Se2: Se 0.181818; α-Pd4Se: Se 0.2	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 4, p. 8, row 36 report
662	eutectic: Liq -> Pd34Se11 + Pd7Se4	Pd34Se11: Se 0.244444; Pd7Se4: Se 0.363636	experimental	[1] Bordier 2014	Table 4, p. 8, row 31 report
659	eutectic: Liq -> Pd34Se11 + Pd7Se4	Pd34Se11: Se 0.244444; Pd7Se4: Se 0.363636	model	[1] Bordier 2014	Table 4, p. 8, row 32 report
658	Pd9Se2 -> FCC + α-Pd4Se	Pd9Se2: Se 0.181818; α-Pd4Se: Se 0.2	experimental	[1] Bordier 2014 cites Takabatake 1987 doi	Table 4, p. 8, row 35 report
658	eutectic: Liq -> Pd34Se11 + Pd7Se4	Pd34Se11: Se 0.244444; Pd7Se4: Se 0.363636	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 4, p. 8, row 30 report
655	eutectic: Liq -> Pd34Se11 + Pd7Se4	Pd34Se11: Se 0.244444; Pd7Se4: Se 0.363636	experimental	[1] Bordier 2014 cites Takabatake 1987 doi	Table 4, p. 8, row 29 report
648	eutectic: Liq -> Pd34Se11 + Pd17Se15	Pd34Se11: Se 0.244444; Pd17Se15: Se 0.46875	experimental	[1] Bordier 2014	Table 4, p. 8, row 33 report
646	eutectic: Liq -> Pd34Se11 + Pd17Se15	Pd34Se11: Se 0.244444; Pd17Se15: Se 0.46875	model	[1] Bordier 2014	Table 4, p. 8, row 34 report
468	PdSe -> PdSe2 + Pd17Se15	PdSe: Se 0.5; PdSe2: Se 0.666667; Pd17Se15: Se 0.46875	model	[1] Bordier 2014	Table 4, p. 8, row 39 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, Pd–Se system (6)
Phase	Value	T (K)	Class	Source	Location
Pd1.133Se	-72.68 kJ/mol (basis unstated) ± 0.82	298.15	model	[1] Bordier 2014 cites Stolyarova 2011 doi	Table 3, p. 7, row 9 report
Pd1.133Se	-72.17 kJ/mol (basis unstated)	298.15	model	[1] Bordier 2014	Table 3, p. 7, row 10 report
Pd1.133Se (i.e. Pd17Se15)	-72.68 kJ/mol (basis unstated) ± 0.82	298.15	experimental	[1] Bordier 2014 cites Stolyarova 2011 doi	Table 2, p. 3, row 3 report
PdSe2	-86.67 kJ/mol (basis unstated)	298.15	model	[1] Bordier 2014	Table 3, p. 7, row 8 report
PdSe2	-86.4 kJ/mol (basis unstated) ± 1.8	298.15	experimental	[1] Bordier 2014 cites Stolyarova 2011 doi	Table 2, p. 3, row 3 report
PdSe2	-86.4 kJ/mol (basis unstated) ± 1.8	298.15	model	[1] Bordier 2014 cites Stolyarova 2011 doi	Table 3, p. 7, row 7 report

Other properties

Phase transition (7)

Phase transition, Pd–Se system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	468 K	468	other	model	[1] Bordier 2014	p. 7 report	Its low temperature of decomposition is calculated at 468 K, in accordance with the 473 K value recommanded by Vymazalová [14].
Phase transition	473 K	473	other	experimental	[1] Bordier 2014 cites Vymazalova 2013	p. 7 report	Its low temperature of decomposition is calculated at 468 K, in accordance with the 473 K value recommanded by Vymazalová [14].
Phase transition	705 K	705	other	experimental	[1] Bordier 2014	p. 7 report	The liquidus at 759 K and the decomposition of Pd34 Se11 measured at 705 K are consistent with Olsen et al. [3].
Phase transition	788 K	788	β-Pd4Se -> α β-Pd4Se: Se 0.2; α: Se 0.2	experimental	[1] Bordier 2014 cites Takabatake 1987 doi	Table 4, p. 8, row 25 report
Phase transition	800 K	800	β-Pd4Se -> α β-Pd4Se: Se 0.2; α: Se 0.2	experimental	[1] Bordier 2014	Table 4, p. 8, row 27 report
Phase transition	800 K	800	β-Pd4Se -> α β-Pd4Se: Se 0.2; α: Se 0.2	model	[1] Bordier 2014	Table 4, p. 8, row 28 report
Phase transition	800 K	800	β-Pd4Se -> α β-Pd4Se: Se 0.2; α: Se 0.2	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 4, p. 8, row 26 report

Crystal structure (17)

Crystal structure, Pd–Se system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	10.606 Å	298.15	Pd17Se15 alloy: Se 0.46875	experimental	[1] Bordier 2014 cites Kjekshus 1960 doi	Table 1, p. 2, row 7 report
Lattice a	21.413 Å	298.15	Pd34Se11 alloy: Se 0.244444	unspecified	[1] Bordier 2014 cites Sato 1989	Table 1, p. 2, row 5 report
Lattice a	9.441 Å	298.15	Pd7Se2 alloy: Se 0.222222	unspecified	[1] Bordier 2014 cites Olsen 1979 doi	Table 1, p. 2, row 4 report
Lattice a	10.162 Å	298.15	Pd7Se4 alloy: Se 0.363636	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 1, p. 2, row 6 report
Lattice a	11.5646 not_printed	298.15	PdSe alloy: Se 0.5	model	[1] Bordier 2014 cites Ijjaal 2001	Table 1, p. 2, row 8 report
Lattice a	5.741 Å	298.15	PdSe2 alloy: Se 0.666667	experimental	[1] Bordier 2014 cites Grnvold 1957 doi	Table 1, p. 2, row 9 report
Lattice a	5.2324 Å	298.15	α-Pd4Se alloy: Se 0.2	experimental	[1] Bordier 2014 cites Grnvold 1962 doi	Table 1, p. 2, row 2 report
Lattice b	5.504 Å	298.15	Pd34Se11 alloy: Se 0.244444	unspecified	[1] Bordier 2014 cites Sato 1989	Table 1, p. 2, row 5 report
Lattice b	5.37 Å	298.15	Pd7Se2 alloy: Se 0.222222	unspecified	[1] Bordier 2014 cites Olsen 1979 doi	Table 1, p. 2, row 4 report
Lattice b	6.863 Å	298.15	Pd7Se4 alloy: Se 0.363636	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 1, p. 2, row 6 report
Lattice b	5.866 Å	298.15	PdSe2 alloy: Se 0.666667	experimental	[1] Bordier 2014 cites Grnvold 1957 doi	Table 1, p. 2, row 9 report
Lattice c	12.03 Å	298.15	Pd34Se11 alloy: Se 0.244444	unspecified	[1] Bordier 2014 cites Sato 1989	Table 1, p. 2, row 5 report
Lattice c	5.495 Å	298.15	Pd7Se2 alloy: Se 0.222222	unspecified	[1] Bordier 2014 cites Olsen 1979 doi	Table 1, p. 2, row 4 report
Lattice c	5.375 Å	298.15	Pd7Se4 alloy: Se 0.363636	experimental	[1] Bordier 2014 cites Olsen 1979 doi	Table 1, p. 2, row 6 report
Lattice c	6.9978 not_printed ± 6.000e-4	298.15	PdSe alloy: Se 0.5	model	[1] Bordier 2014 cites Ijjaal 2001	Table 1, p. 2, row 8 report
Lattice c	7.691 Å	298.15	PdSe2 alloy: Se 0.666667	experimental	[1] Bordier 2014 cites Grnvold 1957 doi	Table 1, p. 2, row 9 report
Lattice c	5.647 Å	298.15	α-Pd4Se alloy: Se 0.2	experimental	[1] Bordier 2014 cites Grnvold 1962 doi	Table 1, p. 2, row 2 report

Sources

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

S. Bordier, A. Chocard, S. Gossé, Thermodynamic assessment of the palladium–selenium (Pd–Se) system, Journal of Nuclear Materials 451, 120-129 (2014). doi:10.1016/j.jnucmat.2014.03.044

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}
}