Ca–Pb system

82 accepted literature values from 2 paper(s) (experimental 34, model 48); 3 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 (8) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	34
model	48

Accepted values by property group
Property group	Values
invariant reaction	32
phase transition	9
formation	29
mixing / partial	12

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
CaPb-04Car.tdb	Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Thermochim. Acta, 414, 197-202(2004). doi:10.1016/j.tca.2004.01.001	`189da9f48238a281880f6dd45f8bd40ae6124ab40a5243ee040846e0353af3f9`	viewer · TDB · JSON
CaPb-08Idb.tdb	M. Idbenali, C. Servant, N. Selhaoui, L. Bouirden, Calphad, 32, 64-73(2008). doi:10.1016/j.calphad.2007.10.004	`605c17cf815082fd690abd8b74805821ebb664edc2226c998a5fa65b9a831027`	viewer · TDB · JSON
CaPb-89Not.tdb	M. Notin, L. Bouirden, E. Belbacha, J. Hertz, J. Less Common Met., 154, 121-35(1989). doi:10.1016/0022-5088(89)90177-X	`56357d039a751b6d0f953a66ebc9a60ed52ed115983bbb4b3c7aa419e255adc1`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CaPb-04Car.tdb	1403.04	CA2PB_C37 (x(Pb) 0.33333) + CA5PB3 (x(Pb) 0.375) + LIQUID (x(Pb) 0.40801)
CaPb-04Car.tdb	1238	CA5PB3 (x(Pb) 0.375) + CAPB_L10 (x(Pb) 0.5) + LIQUID (x(Pb) 0.5002)
CaPb-04Car.tdb	1021.08	BCC_A2 (x(Pb) 0) + LIQUID (x(Pb) 0.1002) + CA2PB_C37 (x(Pb) 0.33333)
CaPb-04Car.tdb	896.76	CAPB_L10 (x(Pb) 0.5) + LIQUID (x(Pb) 0.68523) + CAPB3_L12 (x(Pb) 0.75)
CaPb-04Car.tdb	716.03	BCC_A2 (x(Pb) 0) + FCC_A1 (x(Pb) 0) + CA2PB_C37 (x(Pb) 0.33333)
CaPb-04Car.tdb	601.95	CAPB3_L12 (x(Pb) 0.75) + LIQUID (x(Pb) 0.99593) + FCC_A1 (x(Pb) 0.99607)
CaPb-04Car.tdb	601.95	CAPB3_L12 (x(Pb) 0.75) + LIQUID (x(Pb) 0.99595) + FCC_A1 (x(Pb) 0.99608)
CaPb-04Car.tdb	601.95	CAPB3_L12 (x(Pb) 0.75) + LIQUID (x(Pb) 0.99604) + FCC_A1 (x(Pb) 0.99613)
CaPb-08Idb.tdb	1398.31	CA2PB_C37 (x(Pb) 0.33333) + CA5PB3 (x(Pb) 0.375) + LIQUID (x(Pb) 0.39377)
CaPb-08Idb.tdb	1246.81	CA5PB3 (x(Pb) 0.375) + LIQUID (x(Pb) 0.49101) + CAPB_L10 (x(Pb) 0.5)
CaPb-08Idb.tdb	1015.45	BCC_A2 (x(Pb) 0) + LIQUID (x(Pb) 0.07707) + CA2PB_C37 (x(Pb) 0.33333)
CaPb-08Idb.tdb	911.15	CAPB_L10 (x(Pb) 0.5) + LIQUID (x(Pb) 0.69739) + CAPB3_L12 (x(Pb) 0.75)
CaPb-08Idb.tdb	716.03	BCC_A2 (x(Pb) 0) + FCC_A1 (x(Pb) 0) + CA2PB_C37 (x(Pb) 0.33333)
CaPb-08Idb.tdb	599.07	CAPB3_L12 (x(Pb) 0.75) + LIQUID (x(Pb) 0.99337) + FCC_A1 (x(Pb) 0.99682)
CaPb-08Idb.tdb	599.07	CAPB3_L12 (x(Pb) 0.75) + LIQUID (x(Pb) 0.99345) + FCC_A1 (x(Pb) 0.99684)
CaPb-89Not.tdb	1435.57	CA2PB_C37 (x(Pb) 0.33333) + CA5PB3 (x(Pb) 0.375) + LIQUID (x(Pb) 0.39023)
CaPb-89Not.tdb	1435.57	CA2PB_C37 (x(Pb) 0.33333) + CA5PB3 (x(Pb) 0.375) + LIQUID (x(Pb) 0.39022)
CaPb-89Not.tdb	1435.57	CA2PB_C37 (x(Pb) 0.33333) + CA5PB3 (x(Pb) 0.375) + LIQUID (x(Pb) 0.39015)
CaPb-89Not.tdb	1236.35	CA5PB3 (x(Pb) 0.375) + CAPB_L10 (x(Pb) 0.5) + LIQUID (x(Pb) 0.50252)
CaPb-89Not.tdb	1236.35	CA5PB3 (x(Pb) 0.375) + CAPB_L10 (x(Pb) 0.5) + LIQUID (x(Pb) 0.50265)
CaPb-89Not.tdb	1236.35	CA5PB3 (x(Pb) 0.375) + CAPB_L10 (x(Pb) 0.5) + LIQUID (x(Pb) 0.50271)
CaPb-89Not.tdb	1050.38	BCC_A2 (x(Pb) 0) + LIQUID (x(Pb) 0.11673) + CA2PB_C37 (x(Pb) 0.33333)
CaPb-89Not.tdb	861.33	CAPB_L10 (x(Pb) 0.5) + LIQUID (x(Pb) 0.66186) + CAPB3_L12 (x(Pb) 0.75)
CaPb-89Not.tdb	861.33	CAPB_L10 (x(Pb) 0.5) + LIQUID (x(Pb) 0.66179) + CAPB3_L12 (x(Pb) 0.75)
CaPb-89Not.tdb	861.33	CAPB_L10 (x(Pb) 0.5) + LIQUID (x(Pb) 0.66187) + CAPB3_L12 (x(Pb) 0.75)
CaPb-89Not.tdb	716.03	BCC_A2 (x(Pb) 0) + FCC_A1 (x(Pb) 0) + CA2PB_C37 (x(Pb) 0.33333)
CaPb-89Not.tdb	598.1	CAPB3_L12 (x(Pb) 0.75) + LIQUID (x(Pb) 0.99619) + FCC_A1 (x(Pb) 1)
CaPb-89Not.tdb	598.1	CAPB3_L12 (x(Pb) 0.75) + LIQUID (x(Pb) 0.99621) + FCC_A1 (x(Pb) 1)
CaPb-89Not.tdb	591.84	CA2PB_C37 (x(Pb) 0.33333) + CA5PB3 (x(Pb) 0.375) + CAPB_L10 (x(Pb) 0.5)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CaPb-04Car · CALPHAD hull CaPb-89Not

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ca–Pb system (32)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1476.52	congruent melting: Liq ↔ Ca2Pb	Liq: Pb 0.333; Ca2Pb: Pb 0.333	model	[1] Cartigny 2004	Table 3, p. 4, row 6 report
1476.15	congruent melting: Liq ↔ Ca2Pb	Liq: Pb 0.333; Ca2Pb: Pb 0.333	experimental	[1] Cartigny 2004 cites Bruzzone 1976 doi	Table 3, p. 4, row 7 report
1403.23	peritectic: Liq + Ca2Pb ↔ Ca5Pb3	Liq: Pb 0.4078; Ca2Pb: Pb 0.333; Ca5Pb3: Pb 0.375	model	[1] Cartigny 2004	Table 3, p. 4, row 8 report
1403.23	Ca5Pb3 -> Ca2Pb + Liq.	Ca5Pb3: Pb 0.375; Ca2Pb: Pb 0.333333; L: Pb 0.4078	model	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 4, p. 5, row 8 report
1400.15	peritectic: Liq + Ca2Pb ↔ Ca5Pb3	Liq: Pb 0.4; Ca2Pb: Pb 0.333; Ca5Pb3: Pb 0.375	experimental	[1] Cartigny 2004 cites Bruzzone 1976 doi	Table 3, p. 4, row 9 report
1400	Ca5Pb3 -> Ca2Pb + Liq.	Ca5Pb3: Pb 0.375; Ca2Pb: Pb 0.333333; L: Pb 0.4	experimental	[2] Idbenali 2008 cites Itkin 1992 doi	Table 4, p. 5, row 7 report
1398	Ca5Pb3 -> Ca2Pb + Liq.	Ca5Pb3: Pb 0.375; Ca2Pb: Pb 0.333333; L: Pb 0.3935	model	[2] Idbenali 2008	Table 4, p. 5, row 9 report
1247	CaPb -> Ca5Pb3 + Liq.	CaPb: Pb 0.5; Ca5Pb3: Pb 0.375; L: Pb 0.491	model	[2] Idbenali 2008	Table 4, p. 5, row 12 report
1241.15	peritectic: Liq + Ca5Pb3 ↔ CaPb	Liq: Pb 0.505; Ca5Pb3: Pb 0.375; CaPb: Pb 0.5	experimental	[1] Cartigny 2004 cites Bruzzone 1976 doi	Table 3, p. 4, row 11 report
1241	CaPb -> Ca5Pb3 + Liq.	CaPb: Pb 0.5; Ca5Pb3: Pb 0.375; L: Pb 0.52	experimental	[2] Idbenali 2008 cites Itkin 1992 doi	Table 4, p. 5, row 10 report
1238.04	peritectic: Liq + Ca5Pb3 ↔ CaPb	Liq: Pb 0.5002; Ca5Pb3: Pb 0.375; CaPb: Pb 0.5	model	[1] Cartigny 2004	Table 3, p. 4, row 10 report
1238.04	CaPb -> Ca5Pb3 + Liq.	CaPb: Pb 0.5; Ca5Pb3: Pb 0.375; L: Pb 0.5002	model	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 4, p. 5, row 11 report
1115	congruent melting: Liq ↔ βCa	βCa: Pb 0	model	[1] Cartigny 2004	Table 3, p. 4, row 1 report
1023.15	eutectic: Liq ↔ βCa + Ca2Pb	Liq: Pb 0.095; βCa: Pb 0; Ca2Pb: Pb 0.333	experimental	[1] Cartigny 2004 cites Bruzzone 1976 doi	Table 3, p. 4, row 5 report
1023.13	eutectic: Liq ↔ βCa + Ca2Pb	Liq: Pb 0.0974; βCa: Pb 0; Ca2Pb: Pb 0.333	model	[1] Cartigny 2004	Table 3, p. 4, row 4 report
1023.13	(βCa)+Ca2Pb -> Liq.	(βCa): Pb 0; Ca2Pb: Pb 0.333333; L: Pb 0.0974	model	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 4, p. 5, row 2 report
1023	(βCa)+Ca2Pb -> Liq.	(βCa): Pb 0; Ca2Pb: Pb 0.333333; L: Pb 0.095	experimental	[2] Idbenali 2008 cites Itkin 1992 doi	Table 4, p. 5, row 1 report
1017	(βCa)+Ca2Pb -> Liq.	(βCa): Pb 0; Ca2Pb: Pb 0.333333; L: Pb 0.0761	model	[2] Idbenali 2008	Table 4, p. 5, row 3 report
939.15	congruent melting: Liq ↔ CaPb3	Liq: Pb 0.75; CaPb3: Pb 0.75	experimental	[1] Cartigny 2004 cites Bruzzone 1976 doi	Table 3, p. 4, row 15 report
924.21	congruent melting: Liq ↔ CaPb3	Liq: Pb 0.75; CaPb3: Pb 0.75	model	[1] Cartigny 2004	Table 3, p. 4, row 14 report
911.2	CaPb + CaPb3 -> Liq.	CaPb: Pb 0.5; CaPb3: Pb 0.75; L: Pb 0.6974	model	[2] Idbenali 2008	Table 4, p. 5, row 15 report
911.15	eutectic: Liq ↔ CaPb + CaPb3	Liq: Pb 0.635; CaPb: Pb 0.5; CaPb3: Pb 0.75	experimental	[1] Cartigny 2004 cites Bruzzone 1976 doi	Table 3, p. 4, row 13 report
911	CaPb + CaPb3 -> Liq.	CaPb: Pb 0.5; CaPb3: Pb 0.75; L: Pb 0.635	experimental	[2] Idbenali 2008 cites Itkin 1992 doi	Table 4, p. 5, row 13 report
896.79	eutectic: Liq ↔ CaPb + CaPb3	Liq: Pb 0.6852; CaPb: Pb 0.5; CaPb3: Pb 0.75	model	[1] Cartigny 2004	Table 3, p. 4, row 12 report
896.79	CaPb + CaPb3 -> Liq.	CaPb: Pb 0.5; CaPb3: Pb 0.75; L: Pb 0.6852	model	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 4, p. 5, row 14 report
602.52	Liq. + CaPb3 -> (Pb)	L: Pb 0.996; CaPb3: Pb 0.75; (Pb): Pb 0.9949	model	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 4, p. 5, row 21 report
602.52	peritectic: Liq ↔ CaPb3 + Pb	Liq: Pb 0.996; CaPb3: Pb 0.75; Pb: Pb 0.9961	model	[1] Cartigny 2004	Table 3, p. 4, row 16 report
601.9	peritectic: Liq ↔ CaPb3 + Pb	Liq: Pb 0.9964; CaPb3: Pb 0.75; Pb: Pb 0.9949	experimental	[1] Cartigny 2004 cites Vigdorovich 1959	Table 3, p. 4, row 17 report
600.65	congruent melting: Liq ↔ Pb	Liq: Pb 0.01; Pb: Pb 1	model	[1] Cartigny 2004	Table 3, p. 4, row 18 report
599.2	eutectic: Liq. -> CaPb3 + (Pb)	L: Pb 0.9959; CaPb3: Pb 0.75; (Pb): Pb 0.9964	experimental	[2] Idbenali 2008 cites Itkin 1992 doi	Table 4, p. 5, row 19 report
599.1	eutectic: Liq. -> CaPb3 + (Pb)	L: Pb 0.9934; CaPb3: Pb 0.75; (Pb): Pb 0.997	model	[2] Idbenali 2008	Table 4, p. 5, row 20 report
292.6	CaPb -> Ca5Pb3 + CaPb3	CaPb: Pb 0.5; Ca5Pb3: Pb 0.375; CaPb3: Pb 0.75	model	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 4, p. 5, row 22 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, Ca–Pb system (29)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Ca2Pb	Ca2Pb	-69.577 kJ/mol-atom	300	model	-53.157 (mp-aaaabtcg)	-54.694 (oqmd-10998)	[1] Cartigny 2004	Table 2, p. 3, row 8 report
Ca2Pb	Ca2Pb	-69.577 kJ/mol-atom	300	model	-53.157 (mp-aaaabtcg)	-54.694 (oqmd-10998)	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 5, p. 8, row 4 report
Ca2Pb	Ca2Pb	-66.305 kJ/mol-atom	300	model	-53.157 (mp-aaaabtcg)	-54.694 (oqmd-10998)	[2] Idbenali 2008	Table 5, p. 8, row 5 report
Ca2Pb	Ca2Pb	-62 kJ/mol-atom ± 2	300	experimental	-53.157 (mp-aaaabtcg)	-54.694 (oqmd-10998)	[2] Idbenali 2008 cites Sommer 2006 doi	Table 5, p. 8, row 1 report
Ca2Pb	Ca2Pb	-59 kJ/mol-atom ± 1.5	300	experimental	-53.157 (mp-aaaabtcg)	-54.694 (oqmd-10998)	[2] Idbenali 2008 cites Bouirden 1984	Table 5, p. 8, row 3 report
Ca2Pb	Ca2Pb	-59 kJ/mol-atom ± 5	300	experimental	-53.157 (mp-aaaabtcg)	-54.694 (oqmd-10998)	[2] Idbenali 2008 cites Notin 1989 doi	Table 5, p. 8, row 2 report
Ca2Pb	Ca2Pb	-59 kJ/mol-atom ± 1.5	300	experimental	-53.157 (mp-aaaabtcg)	-54.694 (oqmd-10998)	[1] Cartigny 2004 cites Bouirden 1984	Table 2, p. 3, row 7 report
Ca5Pb3	Ca5Pb3	-69.354 kJ/mol-atom	300	model	-50.319 (mp-aaacpgte)	-51.959 (oqmd-55254)	[1] Cartigny 2004	Table 2, p. 3, row 6 report
Ca5Pb3	Ca5Pb3	-69.354 kJ/mol-atom	300	model	-50.319 (mp-aaacpgte)	-51.959 (oqmd-55254)	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 5, p. 8, row 8 report
Ca5Pb3	Ca5Pb3	-64.032 kJ/mol-atom	300	model	-50.319 (mp-aaacpgte)	-51.959 (oqmd-55254)	[2] Idbenali 2008	Table 5, p. 8, row 9 report
Ca5Pb3	Ca5Pb3	-56 kJ/mol-atom ± 5	300	experimental	-50.319 (mp-aaacpgte)	-51.959 (oqmd-55254)	[2] Idbenali 2008 cites Notin 1989 doi	Table 5, p. 8, row 7 report
Ca5Pb3	Ca5Pb3	-56 kJ/mol-atom ± 1	300	experimental	-50.319 (mp-aaacpgte)	-51.959 (oqmd-55254)	[1] Cartigny 2004 cites Bouirden 1984	Table 2, p. 3, row 5 report
Ca5Pb3	Ca5Pb3	-56 kJ/mol-atom ± 1	300	experimental	-50.319 (mp-aaacpgte)	-51.959 (oqmd-55254)	[2] Idbenali 2008 cites Bouirden 1984	Table 5, p. 8, row 6 report
CaPb	CaPb	-58.664 kJ/mol-atom	1040	model	-50.257 (mp-aaaabdqo)	-51.19 (oqmd-28966)	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 5, p. 8, row 12 report
CaPb	CaPb	-58.664 kJ/mol-atom	1040	model	-50.257 (mp-aaaabdqo)	-51.19 (oqmd-28966)	[1] Cartigny 2004	Table 2, p. 3, row 4 report
CaPb	CaPb	-57 kJ/mol-atom ± 2	1040	experimental	-50.257 (mp-aaaabdqo)	-51.19 (oqmd-28966)	[2] Idbenali 2008 cites Bouirden 1984	Table 5, p. 8, row 10 report
CaPb	CaPb	-57 kJ/mol-atom ± 2	1040	experimental	-50.257 (mp-aaaabdqo)	-51.19 (oqmd-28966)	[1] Cartigny 2004 cites Bouirden 1984	Table 2, p. 3, row 3 report
CaPb	CaPb	-55.78 kJ/mol-atom	300	model	-50.257 (mp-aaaabdqo)	-51.19 (oqmd-28966)	[2] Idbenali 2008	Table 5, p. 8, row 13 report
CaPb	CaPb	-52.865 kJ/mol-atom	300	model	-50.257 (mp-aaaabdqo)	-51.19 (oqmd-28966)	[2] Idbenali 2008	Table 5, p. 8, row 14 report
CaPb	CaPb	-52 kJ/mol-atom ± 5	300	experimental	-50.257 (mp-aaaabdqo)	-51.19 (oqmd-28966)	[2] Idbenali 2008 cites Notin 1989 doi	Table 5, p. 8, row 11 report
CaPb3	CaPb3	-36.251 kJ/mol-atom	900	model	-28.013 (mp-aaaabekj)	-32.338 (oqmd-18782)	[1] Cartigny 2004	Table 2, p. 3, row 2 report
CaPb3	CaPb3	-36.251 kJ/mol-atom	900	model	-28.013 (mp-aaaabekj)	-32.338 (oqmd-18782)	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 5, p. 8, row 17 report
CaPb3	CaPb3	-35 kJ/mol-atom ± 0.3	900	experimental	-28.013 (mp-aaaabekj)	-32.338 (oqmd-18782)	[1] Cartigny 2004 cites Bouirden 1984	Table 2, p. 3, row 1 report
CaPb3	CaPb3	-35 kJ/mol-atom ± 0.3	900	experimental	-28.013 (mp-aaaabekj)	-32.338 (oqmd-18782)	[2] Idbenali 2008 cites Bouirden 1984	Table 5, p. 8, row 16 report
CaPb3	CaPb3	-34 kJ/mol-atom ± 0.5	300	experimental	-28.013 (mp-aaaabekj)	-32.338 (oqmd-18782)	[2] Idbenali 2008 cites Notin 1989 doi	Table 5, p. 8, row 19 report
CaPb3	CaPb3	-33.966 kJ/mol-atom	300	model	-28.013 (mp-aaaabekj)	-32.338 (oqmd-18782)	[2] Idbenali 2008	Table 5, p. 8, row 21 report
CaPb3	CaPb3	-33.8 kJ/mol-atom ± 1.4	800	experimental	-28.013 (mp-aaaabekj)	-32.338 (oqmd-18782)	[2] Idbenali 2008 cites Nouri 1985 doi	Table 5, p. 8, row 15 report
CaPb3	CaPb3	-33.2 kJ/mol-atom ± 2	300	experimental	-28.013 (mp-aaaabekj)	-32.338 (oqmd-18782)	[2] Idbenali 2008 cites Sommer 2006 doi	Table 5, p. 8, row 18 report
CaPb3	CaPb3	-32.358 kJ/mol-atom	300	model	-28.013 (mp-aaaabekj)	-32.338 (oqmd-18782)	[2] Idbenali 2008	Table 5, p. 8, row 20 report

Other properties

Phase transition (9)

Phase transition, Ca–Pb system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	924 K	924	congruent transformation	model	[2] Idbenali 2008 cites Cartigny 2004 doi	p. 4 report	They are in satisfactory agreement, except the calculated congruent melting of CaPb3 (T = 925.8 K), close to the calculated one (T = 924 K) in Cartigny et al. [12] but somewhat lower than the experimental one (T = 939 K) in [6,9].
Phase transition	924.21 K	924.21	CaPb3 -> Liq. CaPb3: Pb 0.75; L: Pb 0.75	model	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 4, p. 5, row 17 report
Phase transition	925.8 K	925.8	CaPb3 -> Liq. CaPb3: Pb 0.75; L: Pb 0.75	model	[2] Idbenali 2008	Table 4, p. 5, row 18 report
Phase transition	925.8 K	925.8	congruent transformation	model	[2] Idbenali 2008	p. 4 report	They are in satisfactory agreement, except the calculated congruent melting of CaPb3 (T = 925.8 K), close to the calculated one (T = 924 K) in Cartigny et al. [12] but somewhat lower than the experimental one (T = 939 K) in [6,9].
Phase transition	939 K	939	CaPb3 -> Liq. CaPb3: Pb 0.75; L: Pb 0.75	experimental	[2] Idbenali 2008 cites Itkin 1992 doi	Table 4, p. 5, row 16 report
Phase transition	939 K	939	congruent transformation	experimental	[2] Idbenali 2008 cites Itkin 1992 doi	p. 4 report	They are in satisfactory agreement, except the calculated congruent melting of CaPb3 (T = 925.8 K), close to the calculated one (T = 924 K) in Cartigny et al. [12] but somewhat lower than the experimental one (T = 939 K) in [6,9].
Phase transition	1476 K	1476	Ca2Pb -> Liq. Ca2Pb: Pb 0.333333; L: Pb 0.3333	experimental	[2] Idbenali 2008 cites Itkin 1992 doi	Table 4, p. 5, row 4 report
Phase transition	1476.52 K	1476.52	Ca2Pb -> Liq. Ca2Pb: Pb 0.333333; L: Pb 0.3333	model	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 4, p. 5, row 5 report
Phase transition	1482 K	1482	Ca2Pb -> Liq. Ca2Pb: Pb 0.333333; L: Pb 0.3333	model	[2] Idbenali 2008	Table 4, p. 5, row 6 report

Mixing / partial (12)

Mixing / partial, Ca–Pb system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Enthalpy of mixing	-57.297 kJ/mol-atom	1020	Ca2Pb(l) alloy: Pb 0.333333	model	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 5, p. 8, row 30 report
Enthalpy of mixing	-54 kJ/mol-atom ± 2.5	1020	Ca2Pb(l) alloy: Pb 0.333333	experimental	[2] Idbenali 2008 cites Sommer 2006 doi	Table 5, p. 8, row 28 report
Enthalpy of mixing	-53.756 kJ/mol-atom	1020	Ca2Pb(l) alloy: Pb 0.333333	model	[2] Idbenali 2008	Table 5, p. 8, row 29 report
Enthalpy of mixing	-26.804 kJ/mol-atom	1020	CaPb3(l) alloy: Pb 0.75	model	[2] Idbenali 2008	Table 5, p. 8, row 32 report
Enthalpy of mixing	-27.426 kJ/mol-atom	1020	CaPb3(l) alloy: Pb 0.75	model	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 5, p. 8, row 33 report
Enthalpy of mixing	-27 kJ/mol-atom ± 2	1020	CaPb3(l) alloy: Pb 0.75	experimental	[2] Idbenali 2008 cites Sommer 2006 doi	Table 5, p. 8, row 31 report
Enthalpy of mixing	-57.297 kJ/mol-atom	1020	liquid alloy: Pb 0.333333	model	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 5, p. 8, row 30 report
Enthalpy of mixing	-26.804 kJ/mol-atom	1020	liquid alloy: Pb 0.75	model	[2] Idbenali 2008	Table 5, p. 8, row 32 report
Enthalpy of mixing	-54 kJ/mol-atom ± 2.5	1020	liquid alloy: Pb 0.333333	experimental	[2] Idbenali 2008 cites Sommer 2006 doi	Table 5, p. 8, row 28 report
Enthalpy of mixing	-53.756 kJ/mol-atom	1020	liquid alloy: Pb 0.333333	model	[2] Idbenali 2008	Table 5, p. 8, row 29 report
Enthalpy of mixing	-27.426 kJ/mol-atom	1020	liquid alloy: Pb 0.75	model	[2] Idbenali 2008 cites Cartigny 2004 doi	Table 5, p. 8, row 33 report
Enthalpy of mixing	-27 kJ/mol-atom ± 2	1020	liquid alloy: Pb 0.75	experimental	[2] Idbenali 2008 cites Sommer 2006 doi	Table 5, p. 8, row 31 report

Sources

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

Y. Cartigny, J.M. Fiorani, A. Maı̂tre, M. Vilasi, Thermodynamic assessment of the Ca–Pb system, Thermochimica Acta 414, 197-202 (2004). doi:10.1016/j.tca.2004.01.001
M. Idbenali, C. Servant, N. Selhaoui, L. Bouirden, A thermodynamic reassessment of the Ca–Pb system, Calphad 32, 64-73 (2008). doi:10.1016/j.calphad.2007.10.004

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}
}