Ag–Se system

95 accepted literature values from 2 paper(s) (experimental 54, model 15, DFT 24, unspecified 2); 3 calculated phase diagram(s). 10 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 (9) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	54
model	15
DFT	24
unspecified	2

Accepted values by property group
Property group	Values
invariant reaction	10
phase transition	12
formation	56
heat capacity / entropy / enthalpy	16
other property	1

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
AgSe-18Li.tdb	Z. Li, S.-L. Shang, J. Shen, P.-H. Liao, Z.-K. Liu, T.J. Anderson, J. Phase Equilib. Diffus., 39, 870-81(2018). doi:10.1007/s11669-018-0683-7	`5c67cbc09a8493422619e5b430fd6e6113c2a0a1f73714fb5425b52b51531de6`	viewer · TDB · JSON
AgSe-18Raj.tdb	V.B. Rajkumar, S.-W. Chen, Calphad, 63, 51-60(2018). doi:10.1016/j.calphad.2018.08.004	`006f78e8a914d0c0089987deea3b481ab30b7db0e106de8feec91d051a4df59d`	viewer · TDB · JSON
AgSe-24Hut.tdb	Y. Hutabalian, S.-W. Chen, W. Gierlotka, Calphad, 86, 102709(2024). doi:10.1016/j.calphad.2024.102709	`0dbcbc54a481f33f417d41953fff00320dceed440bbe8fa9d93788fad2db6c59`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
AgSe-18Li.tdb	1742.4	ION#2 (x(Se) 0.15254) + ION (x(Se) 0.32511) + GAS (x(Se) 0.99732)
AgSe-18Li.tdb	1162.23	FCC_A1 (x(Se) 0) + ION#2 (x(Se) 0.07694) + ION (x(Se) 0.3071)
AgSe-18Li.tdb	1113.29	FCC_A1 (x(Se) 0) + ION (x(Se) 0.30875) + AG2SE_BETA (x(Se) 0.33313)
AgSe-18Li.tdb	1008.98	ION#2 (x(Se) 0.41546) + ION (x(Se) 0.92063) + GAS (x(Se) 1)
AgSe-18Li.tdb	887.49	AG2SE_BETA (x(Se) 0.33332) + ION (x(Se) 0.43894) + ION#2 (x(Se) 0.93915)
AgSe-18Li.tdb	490.09	AG2SE_BETA (x(Se) 0.33333) + ION (x(Se) 0.97149) + HEXAGONAL_A8 (x(Se) 1)
AgSe-18Li.tdb	405.44	AG2SE_BETA (x(Se) 0.33333) + AG2SE_ALPHA (x(Se) 0.33335) + HEXAGONAL_A8 (x(Se) 1)
AgSe-18Li.tdb	404.86	FCC_A1 (x(Se) 0) + AG2SE_BETA (x(Se) 0.33292) + AG2SE_ALPHA (x(Se) 0.33319)
AgSe-18Raj.tdb	2406.69	LIQUID#2 (x(Se) 0.06911) + GAS (x(Se) 0.28259) + LIQUID (x(Se) 0.28533)
AgSe-18Raj.tdb	1163.78	FCC_A1 (x(Se) 0) + LIQUID#2 (x(Se) 0.05734) + LIQUID (x(Se) 0.29765)
AgSe-18Raj.tdb	1114.47	FCC_A1 (x(Se) 0) + LIQUID (x(Se) 0.29988) + AG2SE_BETA (x(Se) 0.32521)
AgSe-18Raj.tdb	1044.31	LIQUID#2 (x(Se) 0.45116) + LIQUID (x(Se) 0.93881) + GAS (x(Se) 1)
AgSe-18Raj.tdb	890.35	AG2SE_BETA (x(Se) 0.33364) + LIQUID (x(Se) 0.4446) + LIQUID#2 (x(Se) 0.9482)
AgSe-18Raj.tdb	476.73	AG2SE_BETA (x(Se) 0.33334) + LIQUID (x(Se) 0.98321) + HEXAGONAL_A8 (x(Se) 1)
AgSe-18Raj.tdb	405.23	AG2SE_BETA (x(Se) 0.33333) + AG2SE_ALPHA (x(Se) 0.33333) + HEXAGONAL_A8 (x(Se) 1)
AgSe-18Raj.tdb	405.22	FCC_A1 (x(Se) 0) + AG2SE_BETA (x(Se) 0.33332) + AG2SE_ALPHA (x(Se) 0.33333)
AgSe-24Hut.tdb	1163.58	FCC_A1 (x(Se) 0) + LIQUID#2 (x(Se) 0.074) + LIQUID (x(Se) 0.31485)
AgSe-24Hut.tdb	1134.7	FCC_A1 (x(Se) 0) + LIQUID (x(Se) 0.31831) + AG2SE_BETA (x(Se) 0.33333)
AgSe-24Hut.tdb	1006.51	LIQUID (x(Se) 0.41461) + LIQUID#2 (x(Se) 0.92903) + GAS (x(Se) 1)
AgSe-24Hut.tdb	891.38	AG2SE_BETA (x(Se) 0.33333) + LIQUID (x(Se) 0.41901) + LIQUID#2 (x(Se) 0.95639)
AgSe-24Hut.tdb	493.82	AG2SE_BETA (x(Se) 0.33333) + LIQUID (x(Se) 0.99908) + HEXAGONAL_A8 (x(Se) 1)
AgSe-24Hut.tdb	404.9	AG2SE_BETA (x(Se) 0.33333) + AG2SE_ALPHA (x(Se) 0.33333) + HEXAGONAL_A8 (x(Se) 1)
AgSe-24Hut.tdb	404.9	FCC_A1 (x(Se) 0) + AG2SE_ALPHA (x(Se) 0.33333) + AG2SE_BETA (x(Se) 0.33333)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull AgSe-18Li · CALPHAD hull AgSe-18Raj

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ag–Se system (10)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1163.01	monotectic: L1 -> Ag + L2	L1: Se 0.076; Ag: Se 0; L2: Se 0.307	model	[1] Li 2018	Table 6, p. 9, row 4 report
1163	monotectic: L1 -> Ag + L2	L1: Se 0.082; Ag: Se 0; L2: Se 0.312	experimental	[1] Li 2018 cites Wiggett 1999 doi	Table 6, p. 9, row 2 report
1163	monotectic: L1 -> Ag + L2	L1: Se 0.12; Ag: Se 0; L2: Se 0.313	experimental	[1] Li 2018 cites Pellini 1915	Table 6, p. 9, row 1 report
1163	monotectic: L1 -> Ag + L2	L1: Se 0.11; Ag: Se 0; L2: Se 0.31	experimental	[1] Li 2018 cites Houphouet-Boigny 1984 doi	Table 6, p. 9, row 3 report
1113	eutectic: L2 -> Ag + β-Ag2Se	L2: Se 0.32; Ag: Se 0; β-Ag2Se: Se 0.333	experimental	[1] Li 2018 cites Friedrich 1908	Table 6, p. 9, row 5 report
1112.53	eutectic: L2 -> Ag + β-Ag2Se	L2: Se 0.30876; Ag: Se 0; β-Ag2Se: Se 0.333	model	[1] Li 2018	Table 6, p. 9, row 6 report
889	monotectic: L2 -> β-Ag2Se + L3	L2: Se 0.445; β-Ag2Se: Se 0.333; L3: Se 0.955	unspecified	[1] Li 2018 cites Pelabon 1906	Table 6, p. 9, row 11 report
887.31	monotectic: L2 -> β-Ag2Se + L3	L2: Se 0.439; β-Ag2Se: Se 0.333; L3: Se 0.9402	model	[1] Li 2018	Table 6, p. 9, row 12 report
490	eutectic: L3 -> β-Ag2Se + Se	L3: Se 1; β-Ag2Se: Se 0.333; Se: Se 1	unspecified	[1] Li 2018 cites Karakaya 1990 doi	Table 6, p. 9, row 13 report
489.75	eutectic: L3 -> β-Ag2Se + Se	L3: Se 0.9714; β-Ag2Se: Se 0.333; Se: Se 1	model	[1] Li 2018	Table 6, p. 9, row 14 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, Ag–Se system (40)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
α-Ag2Se	Ag2Se	-14.3633 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Voronin 2011 doi	Table 1, p. 3, row 4 report
α-Ag2Se	Ag2Se	-14.2433 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Osadchii 2007 doi	Table 1, p. 3, row 1 report
α-Ag2Se	Ag2Se	-14.2433 kJ/mol-atom	298.15	model	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018	Table 1, p. 3, row 9 report
α-Ag2Se	Ag2Se	-14.2333 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Nasar 1997 doi	Table 1, p. 3, row 2 report
α-Ag2Se	Ag2Se	-14.1367 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Voronin 2011 doi	Table 1, p. 3, row 3 report
α-Ag2Se	Ag2Se	-14.12 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Grnvold 2003 doi	Table 1, p. 3, row 7 report
α-Ag2Se	Ag2Se	-13.7067 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Feng 2013 doi	Table 1, p. 3, row 8 report
α-Ag2Se	Ag2Se	-13.54 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Oehsen 1981 doi	Table 1, p. 3, row 5 report
α-Ag2Se	Ag2Se	-13.3667 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Olin 2005	Table 1, p. 3, row 6 report
α-Ag2Se		-9.936 kJ/mol-atom		DFT			[1] Li 2018	Table 4, p. 6, row 1 report
α-Ag2Se		-5.869 kJ/mol-atom		DFT			[1] Li 2018	Table 4, p. 6, row 2 report
α-Ag₂Se		-9.936 kJ/mol-atom	0	DFT			[1] Li 2018	Table 4, p. 6, row 1 report
α-Ag₂Se		-5.869 kJ/mol-atom	0	DFT			[1] Li 2018	Table 4, p. 6, row 2 report
β-Ag12Se2		91.738 kJ/mol-atom		DFT			[1] Li 2018	Table 4, p. 6, row 13 report
β-Ag12Se2		97.68 kJ/mol-atom		DFT			[1] Li 2018	Table 4, p. 6, row 14 report
β-Ag18Se2		149.37 kJ/mol-atom		DFT			[1] Li 2018	Table 4, p. 6, row 18 report
β-Ag18Se2		150.532 kJ/mol-atom		DFT			[1] Li 2018	Table 4, p. 6, row 17 report
β-Ag24Se2		20.119 kJ/mol-atom		DFT			[1] Li 2018	Table 4, p. 6, row 15 report
β-Ag24Se2		20.653 kJ/mol-atom		DFT			[1] Li 2018	Table 4, p. 6, row 16 report
β-Ag2Se	Ag2Se	-14.2333 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Nasar 1997 doi	Table 1, p. 3, row 15 report
β-Ag2Se	Ag2Se	-11.6867 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Feng 2013 doi	Table 1, p. 3, row 13 report
β-Ag2Se	Ag2Se	-11.6833 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Grnvold 2003 doi	Table 1, p. 3, row 12 report
β-Ag2Se	Ag2Se	-11.68 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Voronin 2011 doi	Table 1, p. 3, row 11 report
β-Ag2Se	Ag2Se	-11.6733 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Osadchii 2007 doi	Table 1, p. 3, row 10 report
β-Ag2Se	Ag2Se	-11.67 kJ/mol-atom	298.15	model	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018	Table 1, p. 3, row 16 report
β-Ag2Se	Ag2Se	-11.6667 kJ/mol-atom	298.15	experimental	-21.663 (mp-aaabgjqe)	-7.938 (oqmd-1374449)	[1] Li 2018 cites Oehsen 1981 doi	Table 1, p. 3, row 14 report
β-Ag2Se		-4.127 kJ/mol-atom		DFT			[1] Li 2018	Table 4, p. 6, row 7 report
β-Ag2Se		-3.196 kJ/mol-atom		DFT			[1] Li 2018	Table 4, p. 6, row 8 report
β-Ag6Se2		13.937 kJ/mol-atom		DFT			[1] Li 2018	Table 4, p. 6, row 11 report
β-Ag6Se2		22.092 kJ/mol-atom		DFT			[1] Li 2018	Table 4, p. 6, row 12 report
β-Ag₁₂Se₂		91.738 kJ/mol-atom	0	DFT			[1] Li 2018	Table 4, p. 6, row 13 report
β-Ag₁₂Se₂		97.68 kJ/mol-atom	0	DFT			[1] Li 2018	Table 4, p. 6, row 14 report
β-Ag₁₈Se₂		149.37 kJ/mol-atom	0	DFT			[1] Li 2018	Table 4, p. 6, row 18 report
β-Ag₁₈Se₂		150.532 kJ/mol-atom	0	DFT			[1] Li 2018	Table 4, p. 6, row 17 report
β-Ag₂Se		-4.127 kJ/mol-atom	0	DFT			[1] Li 2018	Table 4, p. 6, row 7 report
β-Ag₂Se		-3.196 kJ/mol-atom	0	DFT			[1] Li 2018	Table 4, p. 6, row 8 report
β-Ag₂₄Se₂		20.119 kJ/mol-atom	0	DFT			[1] Li 2018	Table 4, p. 6, row 15 report
β-Ag₂₄Se₂		20.653 kJ/mol-atom	0	DFT			[1] Li 2018	Table 4, p. 6, row 16 report
β-Ag₆Se₂		13.937 kJ/mol-atom	0	DFT			[1] Li 2018	Table 4, p. 6, row 11 report
β-Ag₆Se₂		22.092 kJ/mol-atom	0	DFT			[1] Li 2018	Table 4, p. 6, row 12 report

Other properties

Phase transition (12)

Phase transition, Ag–Se system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	397.5 K	397.5	polymorphic: β-Ag2Se -> α-Ag2Se β-Ag2Se: Se 0.333; α-Ag2Se: Se 0.333333	experimental	[1] Li 2018 cites Voronin 2011 doi	Table 6, p. 9, row 17 report
Phase transition	405.4 K	405.4	polymorphic: β-Ag2Se -> α-Ag2Se β-Ag2Se: Se 0.333; α-Ag2Se: Se 0.333333	experimental	[1] Li 2018 cites Osadchii 2007 doi	Table 6, p. 9, row 15 report
Phase transition	405.42 K	405.42	polymorphic: β-Ag2Se -> α-Ag2Se β-Ag2Se: Se 0.333; α-Ag2Se: Se 0.333333	model	[1] Li 2018	Table 6, p. 9, row 20 report
Phase transition	406 K	406	polymorphic: β-Ag2Se -> α-Ag2Se β-Ag2Se: Se 0.333; α-Ag2Se: Se 0.333333	experimental	[1] Li 2018 cites Nasar 1997 doi	Table 6, p. 9, row 19 report
Phase transition	406 K	406	polymorphic: β-Ag2Se -> α-Ag2Se β-Ag2Se: Se 0.333; α-Ag2Se: Se 0.333333	experimental	[1] Li 2018 cites Olin 2005	Table 6, p. 9, row 16 report
Phase transition	407.7 K	407.7	polymorphic: β-Ag2Se -> α-Ag2Se β-Ag2Se: Se 0.333; α-Ag2Se: Se 0.333333	experimental	[1] Li 2018 cites Feng 2013 doi	Table 6, p. 9, row 18 report
Phase transition	1167 K	1167	congruent melting: L2 -> β-Ag2Se L2: Se 0.333; β-Ag2Se: Se 0.333333	experimental	[1] Li 2018 cites Kulwicki 1963	Table 6, p. 9, row 9 report
Phase transition	1168 K	1168	congruent melting: L2 -> β-Ag2Se L2: Se 0.333; β-Ag2Se: Se 0.333333	experimental	[1] Li 2018 cites Ohno 1994 doi	Table 6, p. 9, row 8 report
Phase transition	1170 K	1170	congruent melting: L2 -> β-Ag2Se L2: Se 0.333; β-Ag2Se: Se 0.333333	experimental	[1] Li 2018 cites Pellini 1915	Table 6, p. 9, row 7 report
Phase transition	1170.12 K	1170.12	congruent melting: L2 -> β-Ag2Se L2: Se 0.333; β-Ag2Se: Se 0.333333	model	[1] Li 2018	Table 6, p. 9, row 10 report
Phase transition	1233.15 K	1233.15	Ag2Se3	model	[2] Shi 2019 cites Yaws 2015 doi	p. 4 report	Yaws[29] assessed the melting temperature of Ag2Se3 to be 960 C based on experimental values.
Phase transition	2096.26 K	2096.26	other	model	[1] Li 2018	p. 8 report	The calculated miscibility gap in liquid phase converges at 2096.26 K, which agrees with the value of Wiggett et al.[25] in that the boundary of the miscibility gap does not converge even at relatively high temperature (* 1450 K).

Formation (16)

Formation, Ag–Se system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Gibbs energy of formation printed: −ΔfG°	-16.4133 kJ/mol-atom	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Feng 2013 doi	Table 1, p. 3, row 8 report
Gibbs energy of formation printed: −ΔfG°	-16.49 kJ/mol-atom	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Osadchii 2007 doi	Table 1, p. 3, row 1 report
Gibbs energy of formation printed: −ΔfG°	-16.49 kJ/mol-atom	298.15	α-Ag2Se alloy: Se 0.333333	model	[1] Li 2018	Table 1, p. 3, row 9 report
Gibbs energy of formation printed: −ΔfG°	-16.53 kJ/mol-atom	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Voronin 2011 doi	Table 1, p. 3, row 4 report
Gibbs energy of formation printed: −ΔfG°	-16.3967 kJ/mol-atom	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Voronin 2011 doi	Table 1, p. 3, row 3 report
Gibbs energy of formation printed: −ΔfG°	-16.34 kJ/mol-atom	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Oehsen 1981 doi	Table 1, p. 3, row 5 report
Gibbs energy of formation printed: −ΔfG°	-16.3 kJ/mol-atom	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Nasar 1997 doi	Table 1, p. 3, row 2 report
Gibbs energy of formation printed: −ΔfG°	-15.6333 kJ/mol-atom	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Olin 2005	Table 1, p. 3, row 6 report
Gibbs energy of formation printed: −ΔfG°	-16.47 kJ/mol-atom	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Grnvold 2003 doi	Table 1, p. 3, row 7 report
Gibbs energy of formation printed: −ΔfG°	-15.81 kJ/mol-atom	298.15	β-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Osadchii 2007 doi	Table 1, p. 3, row 10 report
Gibbs energy of formation printed: −ΔfG°	-15.86 kJ/mol-atom	298.15	β-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Voronin 2011 doi	Table 1, p. 3, row 11 report
Gibbs energy of formation printed: −ΔfG°	-15.9567 kJ/mol-atom	298.15	β-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Nasar 1997 doi	Table 1, p. 3, row 15 report
Gibbs energy of formation printed: −ΔfG°	-15.81 kJ/mol-atom	298.15	β-Ag2Se alloy: Se 0.333333	model	[1] Li 2018	Table 1, p. 3, row 16 report
Gibbs energy of formation printed: −ΔfG°	-15.8267 kJ/mol-atom	298.15	β-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Grnvold 2003 doi	Table 1, p. 3, row 12 report
Gibbs energy of formation printed: −ΔfG°	-15.88 kJ/mol-atom	298.15	β-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Feng 2013 doi	Table 1, p. 3, row 13 report
Gibbs energy of formation printed: −ΔfG°	-15.84 kJ/mol-atom	298.15	β-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Oehsen 1981 doi	Table 1, p. 3, row 14 report

Heat capacity / entropy / enthalpy (16)

Heat capacity / entropy / enthalpy, Ag–Se system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Entropy printed: S°	51.5333 J/mol-atom/K	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Feng 2013 doi	Table 1, p. 3, row 8 report
Entropy printed: S°	49.9967 J/mol-atom/K	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Osadchii 2007 doi	Table 1, p. 3, row 1 report
Entropy printed: S°	49.9933 J/mol-atom/K	298.15	α-Ag2Se alloy: Se 0.333333	model	[1] Li 2018	Table 1, p. 3, row 9 report
Entropy printed: S°	49.7333 J/mol-atom/K	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Voronin 2011 doi	Table 1, p. 3, row 4 report
Entropy printed: S°	50.0267 J/mol-atom/K	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Voronin 2011 doi	Table 1, p. 3, row 3 report
Entropy printed: S°	51.8467 J/mol-atom/K	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Oehsen 1981 doi	Table 1, p. 3, row 5 report
Entropy printed: S°	49.4 J/mol-atom/K	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Nasar 1997 doi	Table 1, p. 3, row 2 report
Entropy printed: S°	49.9667 J/mol-atom/K	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Olin 2005	Table 1, p. 3, row 6 report
Entropy printed: S°	50.3433 J/mol-atom/K	298.15	α-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Grnvold 2003 doi	Table 1, p. 3, row 7 report
Entropy printed: S°	56.3367 J/mol-atom/K	298.15	β-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Osadchii 2007 doi	Table 1, p. 3, row 10 report
Entropy printed: S°	56.48 J/mol-atom/K	298.15	β-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Voronin 2011 doi	Table 1, p. 3, row 11 report
Entropy printed: S°	49.4 J/mol-atom/K	298.15	β-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Nasar 1997 doi	Table 1, p. 3, row 15 report
Entropy printed: S°	56.3333 J/mol-atom/K	298.15	β-Ag2Se alloy: Se 0.333333	model	[1] Li 2018	Table 1, p. 3, row 16 report
Entropy printed: S°	56.3633 J/mol-atom/K	298.15	β-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Grnvold 2003 doi	Table 1, p. 3, row 12 report
Entropy printed: S°	56.5233 J/mol-atom/K	298.15	β-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Feng 2013 doi	Table 1, p. 3, row 13 report
Entropy printed: S°	56.46 J/mol-atom/K	298.15	β-Ag2Se alloy: Se 0.333333	experimental	[1] Li 2018 cites Oehsen 1981 doi	Table 1, p. 3, row 14 report

Other property (1)

Other property, Ag–Se system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Other printed: enthalpy	7.71 kJ/mol	405.42		model	[1] Li 2018	p. 10 report	The temperature and enthalpy of a-Ag2Se to b-Ag2Se transformation are calculated as 405.42 K and 7.71 kJ/mol as shown in Table 6 and 2, respectively.

Sources

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

Zhi Li, Shun-Li Shang, Jianyun Shen, Po-Hsien Liao, Zi-Kui Liu, Timothy J. Anderson, Thermodynamic Assessment of the Ag-Se System Aided by First-Principles Calculations, J. Phase Equilib. Diffus. 39, 870-881 (2018). doi:10.1007/s11669-018-0683-7
Chenying Shi, Biaobiao Yang, Biao Hu, Yong Du, Sheng Yao, Thermodynamic Description of the Al–X (X = S, Se, Te) Systems, J. Phase Equilib. Diffus. 40, 392-402 (2019). doi:10.1007/s11669-019-00733-z

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}
}