O–Pu system

89 accepted literature values from 1 paper(s) (experimental 25, model 55, unspecified 9); 0 calculated phase diagram(s). 7 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · phases (14) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	25
model	55
unspecified	9

Accepted values by property group
Property group	Values
invariant reaction	42
phase transition	2
formation	18
heat capacity / entropy / enthalpy	22
crystal structure	5

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull PuO-08Gue · CALPHAD hull PuO-11Gue

Invariant reactions (literature)

Invariant reactions reported in the literature for the O–Pu system (42)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
4097	congruent melting: L = G		model	[1] Guéneau 2008	Table 3, p. 9, row 1 report
3410	congruent melting: L = G		model	[1] Guéneau 2008	Table 3, p. 9, row 2 report
2718	congruent melting: PuO2 = L	PuO2: O 0.666667, Pu 0.333333; L: O 0.666667, Pu 0.333333	experimental	[1] Guéneau 2008 cites Aitken 1968	Table 3, p. 9, row 15 report
2698	congruent melting: PuO2 = L	PuO2: O 0.666667, Pu 0.333333; L: O 0.666667, Pu 0.333333	unspecified	[1] Guéneau 2008 cites Wriedt 1990 doi	Table 3, p. 9, row 17 report
2673	congruent melting: PuO2 = L	PuO2: O 0.666667, Pu 0.333333; L: O 0.666667, Pu 0.333333	experimental	[1] Guéneau 2008 cites Riley 1970	Table 3, p. 9, row 16 report
2673	congruent melting: PuO2 = L	PuO2: O 0.666667, Pu 0.333333; L: O 0.666667, Pu 0.333333	experimental	[1] Guéneau 2008 cites Russel 1961	Table 3, p. 9, row 13 report
2660	congruent melting: PuO2 = L	PuO2: O 0.666667, Pu 0.333333 (basis unresolved); L: O 0.666667, Pu 0.333333 (basis unresolved)	model	[1] Guéneau 2008	Table 3, p. 9, row 18 report
2640	L = G + PuO2-x	PuO2-x: O 0.666667, Pu 0.333333 (basis unresolved)	model	[1] Guéneau 2008	Table 3, p. 9, row 3 report
2553	congruent melting: PuO2 = L	PuO2: O 0.666667, Pu 0.333333; L: O 0.666667, Pu 0.333333	experimental	[1] Guéneau 2008 cites Chikalla 1964 doi	Table 3, p. 9, row 14 report
2358	congruent melting: Pu2O3 = L	Pu2O3: O 0.6, Pu 0.4; L: O 0.6, Pu 0.4	experimental	[1] Guéneau 2008 cites Chikalla 1964 doi	Table 3, p. 9, row 7 report
2353	congruent melting: Pu2O3 = L	Pu2O3: O 0.6, Pu 0.4; L: O 0.6, Pu 0.4	unspecified	[1] Guéneau 2008 cites Wriedt 1990 doi	Table 3, p. 9, row 9 report
2348	congruent melting: Pu2O3 = L	Pu2O3: O 0.6, Pu 0.4; L: O 0.6, Pu 0.4	experimental	[1] Guéneau 2008 cites Riley 1970	Table 3, p. 9, row 8 report
2330	congruent melting: Pu2O3 = L	Pu2O3: O 0.6, Pu 0.4; L: O 0.6, Pu 0.4	model	[1] Guéneau 2008	Table 3, p. 9, row 10 report
2306	L = Pu2O3 + PuO2	PuO2: O 0.666667, Pu 0.333333 (basis unresolved)	model	[1] Guéneau 2008	Table 3, p. 9, row 12 report
2273	L = Pu2O3 + PuO2	PuO2: O 0.666667, Pu 0.333333 (basis unresolved)	unspecified	[1] Guéneau 2008 cites Wriedt 1990 doi	Table 3, p. 9, row 11 report
2122	L2 = L1 + Pu2O3		model	[1] Guéneau 2008	Table 3, p. 9, row 6 report
2098	L2 = L1 + Pu2O3		experimental	[1] Guéneau 2008 cites Martin 1969	Table 3, p. 9, row 4 report
2098	L2 = L1 + Pu2O3		unspecified	[1] Guéneau 2008 cites Wriedt 1990 doi	Table 3, p. 9, row 5 report
1450	polymorphic: PuO2-x = PuO1.61	PuO2-x: O 0.666667, Pu 0.333333; PuO1.61: O 0.616858, Pu 0.383142	experimental	[1] Guéneau 2008 cites Besmann 1987 doi	Table 3, p. 9, row 19 report
1450	polymorphic: PuO2-x = PuO1.61	PuO2-x: O 0.666667, Pu 0.333333; PuO1.61: O 0.616858, Pu 0.383142	unspecified	[1] Guéneau 2008 cites Wriedt 1990 doi	Table 3, p. 9, row 20 report
1445	polymorphic: PuO2-x = PuO1.61	PuO2-x: O 0.666667, Pu 0.333333 (basis unresolved); PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved)	model	[1] Guéneau 2008	Table 3, p. 9, row 21 report
1422	PuO2-x = Pu2O3 + PuO1.61	PuO2-x: O 0.666667, Pu 0.333333 (basis unresolved); PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved)	model	[1] Guéneau 2008	Table 3, p. 9, row 24 report
1353	PuO2-x = Pu2O3 + PuO1.61	PuO2-x: O 0.666667, Pu 0.333333 (basis unresolved); PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved)	experimental	[1] Guéneau 2008 cites Besmann 1987 doi	Table 3, p. 9, row 22 report
1353	PuO2-x = Pu2O3 + PuO1.61	PuO2-x: O 0.666667, Pu 0.333333 (basis unresolved); PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved)	unspecified	[1] Guéneau 2008 cites Wriedt 1990 doi	Table 3, p. 9, row 23 report
987	PuO2(2) = PuO1.61 + PuO2(1)	PuO2(2): O 0.666667, Pu 0.333333 (basis unresolved); PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved)	model	[1] Guéneau 2008	Table 3, p. 9, row 39 report
943	PuO2(2) = PuO1.61 + PuO2(1)	PuO2(2): O 0.666667, Pu 0.333333 (basis unresolved); PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved)	experimental	[1] Guéneau 2008 cites Boivineau 1976 doi	Table 3, p. 9, row 36 report
912	L = ε-Pu + Pu2O3		model	[1] Guéneau 2008	Table 3, p. 9, row 40 report
903	PuO2(2) = PuO1.61 + PuO2(1)	PuO2(2): O 0.666667, Pu 0.333333 (basis unresolved); PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved)	experimental	[1] Guéneau 2008 cites Sari 1968	Table 3, p. 9, row 37 report
903	PuO2(2) = PuO1.61 + PuO2(1)	PuO2(2): O 0.666667, Pu 0.333333 (basis unresolved); PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved)	unspecified	[1] Guéneau 2008 cites Wriedt 1990 doi	Table 3, p. 9, row 38 report
756	polymorphic: ε-Pu = δ′-Pu		model	[1] Guéneau 2008	Table 3, p. 9, row 41 report
743	PuO1.52 = Pu2O3 + PuO1.61	PuO1.52: O 0.603175, Pu 0.396825 (basis unresolved); PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved)	experimental	[1] Guéneau 2008 cites Sari 1968	Table 3, p. 9, row 27 report
736	polymorphic: δ′-Pu = δ-Pu		model	[1] Guéneau 2008	Table 3, p. 9, row 42 report
723	PuO1.52 = Pu2O3 + PuO1.61	PuO1.52: O 0.603175, Pu 0.396825 (basis unresolved); PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved)	unspecified	[1] Guéneau 2008 cites Wriedt 1990 doi	Table 3, p. 9, row 28 report
711	PuO1.52 = Pu2O3 + PuO1.61	PuO1.52: O 0.603175, Pu 0.396825 (basis unresolved); PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved)	model	[1] Guéneau 2008	Table 3, p. 9, row 29 report
623	PuO1.52 = Pu2O3 + PuO1.61	PuO1.52: O 0.603175, Pu 0.396825 (basis unresolved); PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved)	experimental	[1] Guéneau 2008 cites Gardner 1965 doi	Table 3, p. 9, row 26 report
608	PuO1.61 = PuO1.52 + PuO2	PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved); PuO1.52: O 0.603175, Pu 0.396825 (basis unresolved); PuO2: O 0.666667, Pu 0.333333 (basis unresolved)	experimental	[1] Guéneau 2008 cites Sari 1968	Table 3, p. 9, row 33 report
608	PuO1.61 = PuO1.52 + PuO2	PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved); PuO1.52: O 0.603175, Pu 0.396825 (basis unresolved); PuO2: O 0.666667, Pu 0.333333 (basis unresolved)	unspecified	[1] Guéneau 2008 cites Wriedt 1990 doi	Table 3, p. 9, row 34 report
576	PuO1.61 = PuO1.52 + PuO2	PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved); PuO1.52: O 0.603175, Pu 0.396825 (basis unresolved); PuO2: O 0.666667, Pu 0.333333 (basis unresolved)	model	[1] Guéneau 2008	Table 3, p. 9, row 35 report
573	PuO1.61 = PuO1.52 + PuO2	PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved); PuO1.52: O 0.603175, Pu 0.396825 (basis unresolved); PuO2: O 0.666667, Pu 0.333333 (basis unresolved)	experimental	[1] Guéneau 2008 cites Boivineau 1976 doi	Table 3, p. 9, row 32 report
573	PuO1.52 = Pu2O3 + PuO1.61	PuO1.52: O 0.603175, Pu 0.396825; PuO1.61: O 0.616858, Pu 0.383142	experimental	[1] Guéneau 2008 cites Boivineau 1976 doi	Table 3, p. 9, row 25 report
573	PuO1.61 = PuO1.52 + PuO2	PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved); PuO1.52: O 0.603175, Pu 0.396825 (basis unresolved); PuO2: O 0.666667, Pu 0.333333 (basis unresolved)	experimental	[1] Guéneau 2008 cites Chikalla 1964 doi	Table 3, p. 9, row 30 report
573	PuO1.61 = PuO1.52 + PuO2	PuO1.61: O 0.616858, Pu 0.383142 (basis unresolved); PuO1.52: O 0.603175, Pu 0.396825 (basis unresolved); PuO2: O 0.666667, Pu 0.333333 (basis unresolved)	experimental	[1] Guéneau 2008 cites Gardner 1965 doi	Table 3, p. 9, row 31 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, O–Pu system (18)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Pu2O3	Pu2O3	-337 kJ/mol-atom ± 5	298.15	model	-328.25 (mp-aaaabfrz)	-350.52 (oqmd-12710)	[1] Guéneau 2008 cites Markin 1966	Table 5, p. 12, row 5 report
Pu2O3	Pu2O3	-334 kJ/mol-atom ± 4	298.15	model	-328.25 (mp-aaaabfrz)	-350.52 (oqmd-12710)	[1] Guéneau 2008 cites Glushko 1982	Table 5, p. 12, row 6 report
Pu2O3	Pu2O3	-331.24 kJ/mol-atom	298.15	model	-328.25 (mp-aaaabfrz)	-350.52 (oqmd-12710)	[1] Guéneau 2008	Table 5, p. 12, row 1 report
Pu2O3	Pu2O3	-331.2 kJ/mol-atom	298.15	model	-328.25 (mp-aaaabfrz)	-350.52 (oqmd-12710)	[1] Guéneau 2008 cites Besmann 1987 doi	Table 5, p. 12, row 3 report
Pu2O3	Pu2O3	-331.2 kJ/mol-atom ± 2	298.15	model	-328.25 (mp-aaaabfrz)	-350.52 (oqmd-12710)	[1] Guéneau 2008 cites Lemire 2001	Table 5, p. 12, row 7 report
Pu2O3	Pu2O3	-330.8 kJ/mol-atom ± 4	298.15	model	-328.25 (mp-aaaabfrz)	-350.52 (oqmd-12710)	[1] Guéneau 2008 cites Chereau 1977 doi	Table 5, p. 12, row 4 report
PuO1,52		-335.317 kJ/mol-atom ± 3.96825	298.15	model			[1] Guéneau 2008 cites Lemire 2001	Table 5, p. 12, row 9 report
PuO1,52		-332.54 kJ/mol-atom	298.15	model			[1] Guéneau 2008	Table 5, p. 12, row 8 report
PuO1,61		-342.912 kJ/mol-atom ± 2.29885	298.15	model			[1] Guéneau 2008 cites Markin 1966	Table 5, p. 12, row 11 report
PuO1,61		-338.889 kJ/mol-atom ± 6.39847	298.15	model			[1] Guéneau 2008 cites Chereau 1977 doi	Table 5, p. 12, row 12 report
PuO1,61		-335.441 kJ/mol-atom ± 3.83142	298.15	model			[1] Guéneau 2008 cites Lemire 2001	Table 5, p. 12, row 13 report
PuO1,61		-332.261 kJ/mol-atom	298.15	model			[1] Guéneau 2008	Table 5, p. 12, row 10 report
PuO2	PuO2	-353.433 kJ/mol-atom	298.15	model	-352.148 (mp-aaaaacxj)	-314.622 (oqmd-6102)	[1] Guéneau 2008	Table 5, p. 12, row 14 report
PuO2	PuO2	-352.667 kJ/mol-atom ± 0.533333	298.15	model	-352.148 (mp-aaaaacxj)	-314.622 (oqmd-6102)	[1] Guéneau 2008 cites Holley 1958	Table 5, p. 12, row 16 report
PuO2	PuO2	-352 kJ/mol-atom ± 1.33333	298.15	model	-352.148 (mp-aaaaacxj)	-314.622 (oqmd-6102)	[1] Guéneau 2008 cites Popov 1957 doi	Table 5, p. 12, row 15 report
PuO2	PuO2	-351.933 kJ/mol-atom ± 0.266667	298.15	model	-352.148 (mp-aaaaacxj)	-314.622 (oqmd-6102)	[1] Guéneau 2008 cites Glushko 1982	Table 5, p. 12, row 19 report
PuO2	PuO2	-351.933 kJ/mol-atom ± 0.333333	298.15	model	-352.148 (mp-aaaaacxj)	-314.622 (oqmd-6102)	[1] Guéneau 2008 cites Lemire 2001	Table 5, p. 12, row 20 report
PuO2	PuO2	-351.9 kJ/mol-atom ± 0.24	298.15	model	-352.148 (mp-aaaaacxj)	-314.622 (oqmd-6102)	[1] Guéneau 2008 cites Johnson 1969 doi	Table 5, p. 12, row 17 report

Other properties

Phase transition (2)

Phase transition, O–Pu system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	17.65 K	17.65	other	experimental	[1] Guéneau 2008 cites Flotow 1981 doi	p. 4 report	For the Pu2O3 compound, determinations of the heat capacity at low temperature by Flotow et al. [41] (including a k transition at 17.65 K) led to an entropy value at 298 K as compiled by Glushko et al. [42] and Lemire et al. [43] and retained in the SGTE data bank [44].
Phase transition	2358 K	2358	Pu2O3	experimental	[1] Guéneau 2008	p. 4 report	Glushko estimated the high temperature heat capacity by comparison with PuO2(s) (using a Cp ratio 1.7 from 350 K to the melting temperature 2358 K).

Heat capacity / entropy / enthalpy (22)

Heat capacity / entropy / enthalpy, O–Pu system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Entropy printed: S (298.15 K)	32.6 J/mol-atom/K	298.15	Pu2O3 alloy: Pu 0.4	model	[1] Guéneau 2008 cites Glushko 1982	Table 5, p. 12, row 6 report
Entropy printed: S (298.15 K)	31.88 J/mol-atom/K ± 5.02	298.15	Pu2O3 alloy: Pu 0.4	model	[1] Guéneau 2008 cites Chereau 1977 doi	Table 5, p. 12, row 4 report
Entropy printed: S (298.15 K)	32.68 J/mol-atom/K	298.15	Pu2O3 alloy: Pu 0.4	model	[1] Guéneau 2008	Table 5, p. 12, row 1 report
Entropy printed: S (298.15 K)	28.44 J/mol-atom/K ± 4.18	298.15	Pu2O3 alloy: Pu 0.4	model	[1] Guéneau 2008 cites Markin 1966	Table 5, p. 12, row 5 report
Entropy printed: S (298.15 K)	32.6 J/mol-atom/K ± 0.12	298.15	Pu2O3 alloy: Pu 0.4	model	[1] Guéneau 2008 cites Lemire 2001	Table 5, p. 12, row 7 report
Entropy printed: S (298.15 K)	32.64 J/mol-atom/K ± 0.12	298.15	Pu2O3 alloy: Pu 0.4	model	[1] Guéneau 2008 cites Flotow 1981 doi	Table 5, p. 12, row 2 report
Entropy printed: S (298.15 K)	31.9048 J/mol-atom/K	298.15	PuO1,52 alloy: O 0.603175, Pu 0.396825	model	[1] Guéneau 2008	Table 5, p. 12, row 8 report
Entropy printed: S (298.15 K)	31.1111 J/mol-atom/K	298.15	PuO1,61 alloy: O 0.616858, Pu 0.383142	model	[1] Guéneau 2008	Table 5, p. 12, row 10 report
Entropy printed: S (298.15 K)	30.7663 J/mol-atom/K ± 4.02299	298.15	PuO1,61 alloy: O 0.616858, Pu 0.383142	model	[1] Guéneau 2008 cites Markin 1966	Table 5, p. 12, row 11 report
Entropy printed: S (298.15 K)	33.3333 J/mol-atom/K ± 6.39847	298.15	PuO1,61 alloy: O 0.616858, Pu 0.383142	model	[1] Guéneau 2008 cites Chereau 1977 doi	Table 5, p. 12, row 12 report
Entropy printed: S (298.15 K)	31.8008 J/mol-atom/K ± 1.91571	298.15	PuO1,61 alloy: O 0.616858, Pu 0.383142	model	[1] Guéneau 2008 cites Lemire 2001	Table 5, p. 12, row 13 report
Entropy printed: S (298.15 K)	22.0433 J/mol-atom/K ± 0.1	298.15	PuO2 alloy: Pu 0.333333	model	[1] Guéneau 2008 cites Flotow 1981 doi	Table 5, p. 12, row 18 report
Entropy printed: S (298.15 K)	22.0433 J/mol-atom/K	298.15	PuO2 alloy: Pu 0.333333	model	[1] Guéneau 2008	Table 5, p. 12, row 14 report
Entropy printed: S (298.15 K)	22.0433 J/mol-atom/K	298.15	PuO2 alloy: Pu 0.333333	model	[1] Guéneau 2008 cites Glushko 1982	Table 5, p. 12, row 19 report
Entropy printed: S (298.15 K)	22.0433 J/mol-atom/K ± 0.0866667	298.15	PuO2 alloy: Pu 0.333333	model	[1] Guéneau 2008 cites Lemire 2001	Table 5, p. 12, row 20 report
Heat capacity printed: Cp (298.15 K)	23.4 J/mol-atom/K	298.15	Pu2O3 alloy: Pu 0.4	model	[1] Guéneau 2008	Table 5, p. 12, row 1 report
Heat capacity printed: Cp (298.15 K)	23.4 J/mol-atom/K ± 0.1	298.15	Pu2O3 alloy: Pu 0.4	model	[1] Guéneau 2008 cites Lemire 2001	Table 5, p. 12, row 7 report
Heat capacity printed: Cp (298.15 K)	23.4 J/mol-atom/K ± 0.1	298.15	Pu2O3 alloy: Pu 0.4	model	[1] Guéneau 2008 cites Flotow 1981 doi	Table 5, p. 12, row 2 report
Heat capacity printed: Cp (298.15 K)	23.4483 J/mol-atom/K ± 1.91571	298.15	PuO1,61 alloy: O 0.616858, Pu 0.383142	model	[1] Guéneau 2008 cites Lemire 2001	Table 5, p. 12, row 13 report
Heat capacity printed: Cp (298.15 K)	22.08 J/mol-atom/K	298.15	PuO2 alloy: Pu 0.333333	model	[1] Guéneau 2008 cites Flotow 1981 doi	Table 5, p. 12, row 18 report
Heat capacity printed: Cp (298.15 K)	22.0833 J/mol-atom/K	298.15	PuO2 alloy: Pu 0.333333	model	[1] Guéneau 2008	Table 5, p. 12, row 14 report
Heat capacity printed: Cp (298.15 K)	22.0833 J/mol-atom/K ± 0.0866667	298.15	PuO2 alloy: Pu 0.333333	model	[1] Guéneau 2008 cites Lemire 2001	Table 5, p. 12, row 20 report

Crystal structure (5)

Crystal structure, O–Pu system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	0.3838 not_printed ± 1.000e-4	298.15	Pu2O3 alloy: Pu 0.4	experimental	[1] Guéneau 2008 cites Wulff 1988 doi	Table 1, p. 2, row 7 report
Lattice a	1.1045 not_printed	298.15	PuO1.52 alloy: Pu 0.396825	experimental	[1] Guéneau 2008 cites Boivineau 1976 doi	Table 1, p. 2, row 8 report
Lattice a	1.0991 not_printed	298.15	PuO1.61 alloy: Pu 0.383142	experimental	[1] Guéneau 2008 cites Sari 1968	Table 1, p. 2, row 9 report
Lattice a	0.53955 not_printed	298.15	PuO2 alloy: Pu 0.333333	experimental	[1] Guéneau 2008 cites Taylor 1984	Table 1, p. 2, row 10 report
Lattice c	0.5918 not_printed ± 1.000e-4	298.15	Pu2O3 alloy: Pu 0.4	experimental	[1] Guéneau 2008 cites Wulff 1988 doi	Table 1, p. 2, row 7 report

Sources

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

Christine Guéneau, Christian Chatillon, Bo Sundman, Thermodynamic modelling of the plutonium–oxygen system, Journal of Nuclear Materials 378, 257-272 (2008). doi:10.1016/j.jnucmat.2008.06.013

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-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); 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); 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. 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_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}
}