Co–Zn system

160 accepted literature values from 3 paper(s) (experimental 26, model 127, unspecified 7); 2 calculated phase diagram(s). 14 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 (11) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	26
model	127
unspecified	7

Accepted values by property group
Property group	Values
invariant reaction	47
heat capacity / entropy / enthalpy	71
activity / EMF / Gibbs energy	31
crystal structure	11

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
CoZn-04Iso.tdb	I. Isomaki, M. Hamalainen, J. Alloys Compd., 375, 191-95(2004). doi:10.1016/j.jallcom.2003.12.002	`97df739c925a45d73399da0ace5613907a1163adc8c9c1156a33887d24047c68`	viewer · TDB · JSON
CoZn-04Vas-LB.tdb	G.P. Vassilev, M. Jiang, J. Phase Equilib. Diffus., 25, 259-68(2004). doi:10.1361/15477030419522	`d5353920b632f1aefcf74117ee09772c9e9c51dfafbd906be2684535a59fb413`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CoZn-04Iso.tdb	1233.14	FCC_A1 (x(Zn) 0.36965) + COZN_A13 (x(Zn) 0.50256) + LIQUID (x(Zn) 0.60169)
CoZn-04Iso.tdb	1147.69	COZN_A13 (x(Zn) 0.5699) + CO5ZN21_D83 (x(Zn) 0.6858) + LIQUID (x(Zn) 0.76351)
CoZn-04Iso.tdb	1017.46	CO5ZN21_D83 (x(Zn) 0.79955) + CO3ZN22 (x(Zn) 0.88) + LIQUID (x(Zn) 0.94818)
CoZn-04Iso.tdb	1017.46	CO5ZN21_D83 (x(Zn) 0.79961) + CO3ZN22 (x(Zn) 0.88) + LIQUID (x(Zn) 0.94828)
CoZn-04Iso.tdb	850.44	CO3ZN22 (x(Zn) 0.88) + CO2ZN28 (x(Zn) 0.93333) + LIQUID (x(Zn) 0.99761)
CoZn-04Iso.tdb	850.44	CO3ZN22 (x(Zn) 0.88) + CO2ZN28 (x(Zn) 0.93333) + LIQUID (x(Zn) 0.9976)
CoZn-04Iso.tdb	850.44	CO3ZN22 (x(Zn) 0.88) + CO2ZN28 (x(Zn) 0.93333) + LIQUID (x(Zn) 0.99763)
CoZn-04Iso.tdb	692.69	CO2ZN28 (x(Zn) 0.93333) + HCP_A3 (x(Zn) 0.99996) + LIQUID (x(Zn) 0.99999)
CoZn-04Iso.tdb	692.69	CO2ZN28 (x(Zn) 0.93333) + HCP_A3 (x(Zn) 0.99996) + LIQUID (x(Zn) 0.99999)
CoZn-04Iso.tdb	594.01	HCP_A3 (x(Zn) 0.04023) + FCC_A1 (x(Zn) 0.05102) + COZN_A13 (x(Zn) 0.49304)
CoZn-04Vas-LB.tdb	1246.52	FCC_A1 (x(Zn) 0.3524) + BCC_A2 (x(Zn) 0.49323) + LIQUID (x(Zn) 0.66052)
CoZn-04Vas-LB.tdb	1193.9	BCC_A2 (x(Zn) 0.53266) + COZN_A13 (x(Zn) 0.53367) + LIQUID (x(Zn) 0.69768)
CoZn-04Vas-LB.tdb	1193.31	FCC_A1 (x(Zn) 0.36444) + BCC_A2 (x(Zn) 0.49806) + COZN_A13 (x(Zn) 0.5004)
CoZn-04Vas-LB.tdb	1176.77	COZN_A13 (x(Zn) 0.5576) + CO5ZN21_D83 (x(Zn) 0.69099) + LIQUID (x(Zn) 0.71556)
CoZn-04Vas-LB.tdb	1016.39	CO5ZN21_D83 (x(Zn) 0.79771) + CO2ZN15 (x(Zn) 0.88235) + LIQUID (x(Zn) 0.92129)
CoZn-04Vas-LB.tdb	1016.39	CO5ZN21_D83 (x(Zn) 0.79768) + CO2ZN15 (x(Zn) 0.88235) + LIQUID (x(Zn) 0.92123)
CoZn-04Vas-LB.tdb	1014.74	FCC_A1 (x(Zn) 0.20042) + FCC_A1#2 (x(Zn) 0.2335) + COZN_A13 (x(Zn) 0.46737)
CoZn-04Vas-LB.tdb	961.13	CO5ZN21_D83 (x(Zn) 0.80554) + COZN7 (x(Zn) 0.875) + CO2ZN15 (x(Zn) 0.88235)
CoZn-04Vas-LB.tdb	961.13	CO5ZN21_D83 (x(Zn) 0.80559) + COZN7 (x(Zn) 0.875) + CO2ZN15 (x(Zn) 0.88235)
CoZn-04Vas-LB.tdb	961.13	CO5ZN21_D83 (x(Zn) 0.80554) + COZN7 (x(Zn) 0.875) + CO2ZN15 (x(Zn) 0.88235)
CoZn-04Vas-LB.tdb	948.09	COZN7 (x(Zn) 0.875) + CO2ZN15 (x(Zn) 0.88235) + LIQUID (x(Zn) 0.96117)
CoZn-04Vas-LB.tdb	948.09	COZN7 (x(Zn) 0.875) + CO2ZN15 (x(Zn) 0.88235) + LIQUID (x(Zn) 0.96106)
CoZn-04Vas-LB.tdb	948.09	COZN7 (x(Zn) 0.875) + CO2ZN15 (x(Zn) 0.88235) + LIQUID (x(Zn) 0.96125)
CoZn-04Vas-LB.tdb	840.18	COZN7 (x(Zn) 0.875) + COZN13 (x(Zn) 0.92857) + LIQUID (x(Zn) 0.99056)
CoZn-04Vas-LB.tdb	840.18	COZN7 (x(Zn) 0.875) + COZN13 (x(Zn) 0.92857) + LIQUID (x(Zn) 0.99051)
CoZn-04Vas-LB.tdb	840.18	COZN7 (x(Zn) 0.875) + COZN13 (x(Zn) 0.92857) + LIQUID (x(Zn) 0.9906)
CoZn-04Vas-LB.tdb	692.6	COZN13 (x(Zn) 0.92857) + LIQUID (x(Zn) 0.99985) + HCP_A3 (x(Zn) 1)
CoZn-04Vas-LB.tdb	692.6	COZN13 (x(Zn) 0.92857) + LIQUID (x(Zn) 0.99985) + HCP_A3 (x(Zn) 1)
CoZn-04Vas-LB.tdb	658.52	HCP_A3 (x(Zn) 0.02803) + FCC_A1 (x(Zn) 0.037) + COZN_A13 (x(Zn) 0.52497)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CoZn-04Vas-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Co–Zn system (47)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1768	congruent melting: (αCo) ↔ Co(L)		model	[1] Vassilev 2004	Table 4, p. 7, row 24 report
1768	congruent melting: (αCo) ↔ Co(L)		experimental	[1] Vassilev 2004	Table 4, p. 7, row 23 report
1246	eutectic: Liquid -> β1 + Fcc_A1	β1: Zn 0.5	experimental	[2] Isomäki 2004 cites Takayama 1995 doi	Table 1, p. 2, row 2 report
1239	peritectic: α + L <-> β	α: Zn 0.358; L: Zn 0.664; β: Zn 0.495	model	[1] Vassilev 2004	Table 3, p. 6, row 3 report
1239	peritectic: α + L ↔ β		experimental	[1] Vassilev 2004	Table 4, p. 7, row 21 report
1239	peritectic: α + L <-> β	α: Zn 0.375; L: Zn 0.64; β: Zn 0.495	experimental	[1] Vassilev 2004 cites Hansen 1958	Table 3, p. 6, row 2 report
1238.95	peritectic: α + L ↔ β		model	[1] Vassilev 2004	Table 4, p. 7, row 22 report
1233	eutectic: Liquid -> β1 + Fcc_A1	β1: Zn 0.5	model	[2] Isomäki 2004	Table 1, p. 2, row 1 report
1198	peritectoid: α + β ↔ β1	β1: Co 0.5, Zn 0.5	model	[1] Vassilev 2004	Table 4, p. 7, row 20 report
1198	peritectoid: α + β <-> β1	α: Zn 0.368; β: Zn 0.506; β1: Zn 0.502	model	[1] Vassilev 2004	Table 3, p. 6, row 5 report
1198	peritectoid: α + β ↔ β1	β1: Co 0.5, Zn 0.5	experimental	[1] Vassilev 2004	Table 4, p. 7, row 19 report
1198	peritectoid: α + β <-> β1	α: Zn 0.375; β: Zn 0.495; β1: Zn 0.475	experimental	[1] Vassilev 2004 cites Hansen 1958	Table 3, p. 6, row 4 report
1197	eutectoid: β ↔ β1 + γ	β1: Co 0.5, Zn 0.5; γ: Co 0.192308, Zn 0.807692	experimental	[1] Vassilev 2004	Table 4, p. 7, row 17 report
1197	peritectic: L + β1 <-> β	L: Zn 0.694; β1: Zn 0.529; β: Zn 0.532	model	[1] Vassilev 2004	Table 3, p. 6, row 7 report
1197	peritectic: L + β1 <-> β	L: Zn 0.665; β1: Zn 0.515; β: Zn 0.535	experimental	[1] Vassilev 2004 cites Hansen 1958	Table 3, p. 6, row 6 report
1197	eutectoid: β ↔ β1 + γ	β1: Co 0.5, Zn 0.5; γ: Co 0.192308, Zn 0.807692	model	[1] Vassilev 2004	Table 4, p. 7, row 18 report
1177	peritectic: L + β1 <-> γ	L: Zn 0.716; β1: Zn 0.557; γ: Zn 0.691	model	[1] Vassilev 2004	Table 3, p. 6, row 10 report
1176.82	peritectic: L + β1 ↔ γ	β1: Co 0.5, Zn 0.5; γ: Co 0.192308, Zn 0.807692	model	[1] Vassilev 2004	Table 4, p. 7, row 16 report
1168	peritectic: L + β1 ↔ γ	β1: Co 0.5, Zn 0.5; γ: Co 0.192308, Zn 0.807692	experimental	[1] Vassilev 2004	Table 4, p. 7, row 15 report
1168	peritectic: L + β1 <-> γ	L: Zn 0.71; β1: Zn 0.538; γ: Zn 0.69	experimental	[1] Vassilev 2004 cites Hansen 1958	Table 3, p. 6, row 8 report
1168	peritectic: L + β1 <-> γ	β1: Zn 0.54; γ: Zn 0.66	unspecified	[1] Vassilev 2004 cites Takayama 1995	Table 3, p. 6, row 9 report
1168	eutectic: Liquid -> β1 + γ	β1: Zn 0.5; γ: Zn 0.807692	experimental	[2] Isomäki 2004 cites Takayama 1995 doi	Table 1, p. 2, row 4 report
1168	peritectic: L + γ <-> δ	L: Zn 0.921; γ: Zn 0.798; δ: Zn 0.882	model	[1] Vassilev 2004	Table 3, p. 6, row 12 report
1148	eutectic: Liquid -> β1 + γ	β1: Zn 0.5; γ: Zn 0.807692	model	[2] Isomäki 2004	Table 1, p. 2, row 3 report
1019	peritectic: L + γ <-> δ	L: Zn 0.931; γ: Zn 0.845; δ: Zn 0.875	experimental	[1] Vassilev 2004 cites Hansen 1958	Table 3, p. 6, row 11 report
1019	peritectic: L + γ ↔ δ	γ: Co 0.192308, Zn 0.807692; δ: Co 0.117647, Zn 0.882353	experimental	[1] Vassilev 2004	Table 4, p. 7, row 13 report
1016.49	peritectic: L + γ ↔ δ	γ: Co 0.192308, Zn 0.807692; δ: Co 0.117647, Zn 0.882353	model	[1] Vassilev 2004	Table 4, p. 7, row 14 report
1015	monotectoid: (αCo) (b) <-> (αCo) (c) + β1	β1: Zn 0.467	model	[1] Vassilev 2004	Table 3, p. 6, row 23 report
1014.7	monotectic: (αCo) (c) ↔ (αCo) (d) + β1	β1: Co 0.5, Zn 0.5	model	[1] Vassilev 2004	Table 4, p. 7, row 4 report
963	peritectoid: γ + δ ↔ γ1	γ: Co 0.192308, Zn 0.807692; δ: Co 0.117647, Zn 0.882353; γ1: Co 0.125, Zn 0.875	experimental	[1] Vassilev 2004	Table 4, p. 7, row 11 report
963	peritectoid: γ + δ <-> γ1	γ: Zn 0.854; δ: Zn 0.88; γ1: Zn 0.875	experimental	[1] Vassilev 2004 cites Hansen 1958	Table 3, p. 6, row 13 report
961.13	peritectoid: γ + δ ↔ γ1	γ: Co 0.192308, Zn 0.807692; δ: Co 0.117647, Zn 0.882353; γ1: Co 0.125, Zn 0.875	model	[1] Vassilev 2004	Table 4, p. 7, row 12 report
961	peritectoid: γ + δ <-> γ1	γ: Zn 0.806; δ: Zn 0.882; γ1: Zn 0.875	model	[1] Vassilev 2004	Table 3, p. 6, row 14 report
948.07	peritectic: δ ↔ L + γ1	δ: Co 0.117647, Zn 0.882353; γ1: Co 0.125, Zn 0.875	model	[1] Vassilev 2004	Table 4, p. 7, row 10 report
948	peritectic: δ <-> L + γ1	δ: Co 0.117647, Zn 0.882353; L: Zn 0.961; γ1: Zn 0.875	model	[1] Vassilev 2004	Table 3, p. 6, row 16 report
948	peritectic: δ <-> L + γ1	δ: Zn 0.9; L: Zn 0.97; γ1: Zn 0.875	experimental	[1] Vassilev 2004 cites Pierce 1923	Table 3, p. 6, row 15 report
948	peritectic: δ ↔ L + γ1	δ: Co 0.117647, Zn 0.882353; γ1: Co 0.125, Zn 0.875	experimental	[1] Vassilev 2004	Table 4, p. 7, row 9 report
840.25	peritectic: L + γ1 ↔ γ2	γ1: Co 0.125, Zn 0.875; γ2: Co 0.071429, Zn 0.928571	model	[1] Vassilev 2004	Table 4, p. 7, row 8 report
840	peritectic: γ1 + L <-> γ2	γ1: Zn 0.875; L: Zn 0.991; γ2: Zn 0.9285	model	[1] Vassilev 2004	Table 3, p. 6, row 18 report
839	peritectic: γ1 + L <-> γ2	γ1: Zn 0.9; L: Zn 0.991; γ2: Zn 0.917	experimental	[1] Vassilev 2004 cites Hansen 1958	Table 3, p. 6, row 17 report
839	peritectic: L + γ1 ↔ γ2	γ1: Co 0.125, Zn 0.875; γ2: Co 0.071429, Zn 0.928571	experimental	[1] Vassilev 2004	Table 4, p. 7, row 7 report
692.66	eutectic: L ↔ γ2 + (Zn)	γ2: Co 0.071429, Zn 0.928571	model	[1] Vassilev 2004	Table 4, p. 7, row 6 report
692.65	eutectic: L <-> γ2 + (Zn)	L: Zn 0.9998; γ2: Co 0.071429, Zn 0.928571; (Zn): Zn 1	model	[1] Vassilev 2004	Table 3, p. 6, row 20 report
692.6	eutectic: L <-> γ2 + (Zn)	γ2: Co 0.071429, Zn 0.928571; (Zn): Zn 1	experimental	[1] Vassilev 2004 cites Pierce 1923	Table 3, p. 6, row 19 report
692.6	eutectic: L ↔ γ2 + (Zn)	γ2: Co 0.071429, Zn 0.928571	experimental	[1] Vassilev 2004	Table 4, p. 7, row 5 report
658.48	eutectoid: (αCo) ↔ (εCo) + β1	β1: Co 0.5, Zn 0.5	model	[1] Vassilev 2004	Table 4, p. 7, row 3 report
658	eutectoid: (αCo) <-> (εCo) + β1	(αCo): Zn 0.037; (εCo): Zn 0.028; β1: Zn 0.525	model	[1] Vassilev 2004	Table 3, p. 6, row 24 report

Other properties

Heat capacity / entropy / enthalpy (71)

Heat capacity / entropy / enthalpy, Co–Zn system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Entropy	36.5 J/mol-atom/K	298.15	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 11 report
Entropy	39.8 J/mol-atom/K	298.15	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 1 report
Entropy	41.1 J/mol-atom/K	298.15	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 21 report
Entropy	44.5 J/mol-atom/K	358.38	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 2 report
Entropy	42.2 J/mol-atom/K	371.81	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 12 report
Entropy	47.2 J/mol-atom/K	377.97	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 22 report
Entropy	48.6 J/mol-atom/K	418.62	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 3 report
Entropy	47 J/mol-atom/K	445.48	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 5, p. 9, row 13 report
Entropy	52.3 J/mol-atom/K	457.78	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 23 report
Entropy	52.2 J/mol-atom/K	478.85	γ2	model	[1] Vassilev 2004	Table 6, p. 9, row 4 report
Entropy	51.1 J/mol-atom/K	519.14	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 5, p. 9, row 14 report
Entropy	56.7 J/mol-atom/K	537.6	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 24 report
Entropy	55.4 J/mol-atom/K	539.08	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 5 report
Entropy	54.8 J/mol-atom/K	592.81	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 5, p. 9, row 15 report
Entropy	58.4 J/mol-atom/K	599.32	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 6 report
Entropy	60.6 J/mol-atom/K	617.41	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 25 report
Entropy	61.1 J/mol-atom/K	659.55	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 7 report
Entropy	58.2 J/mol-atom/K	666.47	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 16 report
Entropy	64.1 J/mol-atom/K	697.23	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 26 report
Entropy	63.7 J/mol-atom/K	719.78	γ2	model	[1] Vassilev 2004	Table 6, p. 9, row 8 report
Entropy	61.3 J/mol-atom/K	740.14	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 17 report
Entropy	67.4 J/mol-atom/K	777.04	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 27 report
Entropy	66.2 J/mol-atom/K	780.02	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 9 report
Entropy	64.3 J/mol-atom/K	813.8	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 18 report
Entropy	68.5 J/mol-atom/K	840.25	γ2	model	[1] Vassilev 2004	Table 6, p. 9, row 10 report
Entropy	70.4 J/mol-atom/K	856.86	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 28 report
Entropy	66.9 J/mol-atom/K	887.47	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 19 report
Entropy	73.2 J/mol-atom/K	936.67	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 29 report
Entropy	69.4 J/mol-atom/K	961.13	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 20 report
Entropy	75.7 J/mol-atom/K	1016.49	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 30 report
Heat capacity printed: Cp	31.1 J/mol-atom/K	298.15	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 7, p. 9, row 19 report
Heat capacity printed: Cp	25.4 J/mol-atom/K	298.15	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 11 report
Heat capacity printed: Cp	25.4 J/mol-atom/K	298.15	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 1 report
Heat capacity printed: Cp	31.1 J/mol-atom/K	298.15	γ2	model	[1] Vassilev 2004	Table 7, p. 9, row 10 report
Heat capacity printed: Cp	25.4 J/mol-atom/K	298.15	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 21 report
Heat capacity printed: Cp	25.9 J/mol-atom/K	358.38	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 2 report
Heat capacity printed: Cp	26 J/mol-atom/K	371.81	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 12 report
Heat capacity printed: Cp	26.1 J/mol-atom/K	377.97	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 22 report
Heat capacity printed: Cp	26.5 J/mol-atom/K	418.62	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 3 report
Heat capacity printed: Cp	26.8 J/mol-atom/K	445.48	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 5, p. 9, row 13 report
Heat capacity printed: Cp	26.9 J/mol-atom/K	457.78	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 23 report
Heat capacity printed: Cp	27.1 J/mol-atom/K	478.85	γ2	model	[1] Vassilev 2004	Table 6, p. 9, row 4 report
Heat capacity printed: Cp	27.5 J/mol-atom/K	519.14	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 5, p. 9, row 14 report
Heat capacity printed: Cp	27.7 J/mol-atom/K	537.6	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 24 report
Heat capacity printed: Cp	27.8 J/mol-atom/K	539.08	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 5 report
Heat capacity printed: Cp	28.4 J/mol-atom/K	592.81	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 5, p. 9, row 15 report
Heat capacity printed: Cp	28.5 J/mol-atom/K	599.32	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 6 report
Heat capacity printed: Cp	28.7 J/mol-atom/K	617.41	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 25 report
Heat capacity printed: Cp	29.2 J/mol-atom/K	659.55	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 7 report
Heat capacity printed: Cp	29.3 J/mol-atom/K	666.47	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 16 report
Heat capacity printed: Cp	29.7 J/mol-atom/K	697.23	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 26 report
Heat capacity printed: Cp	30.2 J/mol-atom/K	719.78	γ2	model	[1] Vassilev 2004	Table 6, p. 9, row 8 report
Heat capacity printed: Cp	30.4 J/mol-atom/K	740.14	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 17 report
Heat capacity printed: Cp	30.7 J/mol-atom/K	777.04	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 27 report
Heat capacity printed: Cp	30.8 J/mol-atom/K	780.02	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 9 report
Heat capacity printed: Cp	30.9 J/mol-atom/K	813.8	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 18 report
Heat capacity printed: Cp	31.1 J/mol-atom/K	840.25	γ2	model	[1] Vassilev 2004	Table 6, p. 9, row 10 report
Heat capacity printed: Cp	31.1 J/mol-atom/K	856.86	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 28 report
Heat capacity printed: Cp	31.1 J/mol-atom/K	887.47	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 19 report
Heat capacity printed: Cp	31.2 J/mol-atom/K	936.67	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 29 report
Heat capacity printed: Cp	31.3 J/mol-atom/K	961.13	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 20 report
Heat capacity printed: Cp	31.4 J/mol-atom/K	1016.49	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 30 report
Heat content printed: Enthalpy	-9100 J·mol−1 per mol-atom	371.81	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 12 report
Heat content printed: Enthalpy	-7100 J·mol−1 per mol-atom	445.48	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 5, p. 9, row 13 report
Heat content printed: Enthalpy	-5100 J·mol−1 per mol-atom	519.14	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 5, p. 9, row 14 report
Heat content printed: Enthalpy	-3100 J·mol−1 per mol-atom	592.81	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 5, p. 9, row 15 report
Heat content printed: Enthalpy	-1000 J·mol−1 per mol-atom	666.47	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 16 report
Heat content printed: Enthalpy	1200 J·mol−1 per mol-atom	740.14	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 17 report
Heat content printed: Enthalpy	3500 J·mol−1 per mol-atom	813.8	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 18 report
Heat content printed: Enthalpy	5800 J·mol−1 per mol-atom	887.47	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 19 report
Heat content printed: Enthalpy	8100 J·mol−1 per mol-atom	961.13	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 20 report

Activity / EMF / Gibbs energy (31)

Activity / EMF / Gibbs energy, Co–Zn system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Gibbs energy printed: G	-21900 J·mol−1 per mol-atom	298.15	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 11 report
Gibbs energy printed: G	-26300 J · mol^-1 per mol-atom	298.15	γ2	model	[1] Vassilev 2004	Table 7, p. 9, row 4 report
Gibbs energy printed: G	-18000 J · mol^-1 per mol-atom	298.15	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 1 report
Gibbs energy printed: G	-18700 J mol-1 per mol-atom	298.15	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 21 report
Gibbs energy printed: G	-20500 J · mol^-1 per mol-atom	358.38	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 2 report
Gibbs energy printed: G	-24800 J·mol−1 per mol-atom	371.81	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 12 report
Gibbs energy printed: G	-22300 J mol-1 per mol-atom	377.97	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 22 report
Gibbs energy printed: G	-23300 J · mol^-1 per mol-atom	418.62	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 3 report
Gibbs energy printed: G	-28100 J·mol−1 per mol-atom	445.48	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 5, p. 9, row 13 report
Gibbs energy printed: G	-26300 J mol-1 per mol-atom	457.78	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 23 report
Gibbs energy printed: G	-26300 J · mol^-1 per mol-atom	478.85	γ2	model	[1] Vassilev 2004	Table 6, p. 9, row 4 report
Gibbs energy printed: G	-31700 J·mol−1 per mol-atom	519.14	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 5, p. 9, row 14 report
Gibbs energy printed: G	-30600 J mol-1 per mol-atom	537.6	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 24 report
Gibbs energy printed: G	-29600 J · mol^-1 per mol-atom	539.08	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 5 report
Gibbs energy printed: G	-35600 J·mol−1 per mol-atom	592.81	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 5, p. 9, row 15 report
Gibbs energy printed: G	-33000 J · mol^-1 per mol-atom	599.32	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 6 report
Gibbs energy printed: G	-35300 J mol-1 per mol-atom	617.41	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 25 report
Gibbs energy printed: G	-36600 J · mol^-1 per mol-atom	659.55	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 7 report
Gibbs energy printed: G	-39800 J·mol−1 per mol-atom	666.47	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 16 report
Gibbs energy printed: G	-40300 J mol-1 per mol-atom	697.23	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 26 report
Gibbs energy printed: G	-40400 J · mol^-1 per mol-atom	719.78	γ2	model	[1] Vassilev 2004	Table 6, p. 9, row 8 report
Gibbs energy printed: G	-44200 J·mol−1 per mol-atom	740.14	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 17 report
Gibbs energy printed: G	-45500 J mol-1 per mol-atom	777.04	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 27 report
Gibbs energy printed: G	-44300 J · mol^-1 per mol-atom	780.02	γ2	model	[1] Vassilev 2004	Table 5, p. 9, row 9 report
Gibbs energy printed: G	-48800 J·mol−1 per mol-atom	813.8	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 18 report
Gibbs energy printed: G	-48300 J · mol^-1 per mol-atom	840.25	γ2	model	[1] Vassilev 2004	Table 6, p. 9, row 10 report
Gibbs energy printed: G	-51000 J mol-1 per mol-atom	856.86	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 28 report
Gibbs energy printed: G	-53600 J·mol−1 per mol-atom	887.47	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 19 report
Gibbs energy printed: G	-56700 J mol-1 per mol-atom	936.67	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 29 report
Gibbs energy printed: G	-58700 J·mol−1 per mol-atom	961.13	γ1-phase (CoZn7) alloy: Zn 0.875	model	[1] Vassilev 2004	Table 6, p. 9, row 20 report
Gibbs energy printed: G	-62700 J mol-1 per mol-atom	1016.49	δ-Phase (Co2Zn15) alloy: Zn 0.882353	model	[1] Vassilev 2004	Table 7, p. 9, row 30 report

Crystal structure (11)

Crystal structure, Co–Zn system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	6.345 Å	298.15	β1-CoZn alloy: Co 0.5, Zn 0.5	unspecified	[3] Chen 2013 cites Lihl 1955	Table 1, p. 3, row 1 report
Lattice a	8.9525 Å	298.15	γ-Co5Zn21 alloy: Co 0.192308, Zn 0.807692	experimental	[3] Chen 2013 cites Lihl 1955	Table 1, p. 3, row 2 report
Lattice a	8.927 Å	298.15	γ-Co5Zn21 alloy: Co 0.192308, Zn 0.807692	unspecified	[3] Chen 2013 cites Zhao 2012 doi	Table 1, p. 3, row 3 report
Lattice a	9.03 Å	298.15	γ1-CoZn7.8 alloy: Co 0.113636, Zn 0.886364	unspecified	[3] Chen 2013 cites Lind 2003 doi	Table 1, p. 3, row 4 report
Lattice a	13.306 Å	298.15	γ2-CoZn13 alloy: Co 0.071429, Zn 0.928571	experimental	[3] Chen 2013 cites Lihl 1955	Table 1, p. 3, row 5 report
Lattice b	4.338 Å	298.15	γ1-CoZn7.8 alloy: Co 0.113636, Zn 0.886364	unspecified	[3] Chen 2013 cites Lind 2003 doi	Table 1, p. 3, row 4 report
Lattice b	7.535 Å	298.15	γ2-CoZn13 alloy: Co 0.071429, Zn 0.928571	experimental	[3] Chen 2013 cites Lihl 1955	Table 1, p. 3, row 5 report
Lattice c	12.511 Å	298.15	γ1-CoZn7.8 alloy: Co 0.113636, Zn 0.886364	unspecified	[3] Chen 2013 cites Lind 2003 doi	Table 1, p. 3, row 4 report
Lattice c	4.992 Å	298.15	γ2-CoZn13 alloy: Co 0.071429, Zn 0.928571	experimental	[3] Chen 2013 cites Lihl 1955	Table 1, p. 3, row 5 report
lattice beta	89.9 °	298.15	γ1-CoZn7.8 alloy: Co 0.113636, Zn 0.886364	unspecified	[3] Chen 2013 cites Lind 2003 doi	Table 1, p. 3, row 4 report
lattice beta	126.47 °	298.15	γ2-CoZn13 alloy: Co 0.071429, Zn 0.928571	experimental	[3] Chen 2013 cites Lihl 1955	Table 1, p. 3, row 5 report

Sources

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

George Penev Vassilev, Min Jiang, Thermodynamic Optimization of the Co-Zn System, Journal of Phase Equilibria & Diffusion 25, 259-268 (2004). doi:10.1361/15477030419522
I Isomäki, M Hämäläinen, Thermodynamic evaluation of the Co–Zn system, Journal of Alloys and Compounds 375, 191-195 (2004). doi:10.1016/j.jallcom.2003.12.002
Zhu Chen, Fucheng Yin, Manxiu Zhao, Zhi Li, Experimental Investigation and Thermodynamic Calculation of the B-Co-Zn Ternary System, J. Phase Equilib. Diffus. 34, 366-374 (2013). doi:10.1007/s11669-013-0245-y

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}
}