# Fe–Zn system

> Fe–Zn system: 127 accepted literature values (invariant reaction 70, formation 42, crystal structure 14, activity / EMF / Gibbs energy 1) and 5 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/FE-ZN.html · Markdown: https://data.orchid-project.org/systems/FE-ZN.md

127 accepted literature values from 4 paper(s) (experimental 50, model 61, unspecified 16); 5 calculated phase diagram(s). 11 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: [JSON](https://data.orchid-project.org/literature/systems/FE-ZN.json) · [CSV](https://data.orchid-project.org/systems/FE-ZN.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#FE-ZN) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#FE-ZN/FeZn-00Reu-LB.json) · [phases (8)](https://data.orchid-project.org/phases/pages/FE-ZN.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/FE-ZN.html) · [Markdown](https://data.orchid-project.org/systems/FE-ZN.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 50 |
| model | 61 |
| unspecified | 16 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 70 |
| formation | 42 |
| activity / EMF / Gibbs energy | 1 |
| crystal structure | 14 |

## 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.

Table: Assessments with a calculated phase diagram

| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| FeZn-00Reu-LB.tdb | G. Reumont, P. Perrot, J.M. Fiorani, J. Hertz, J. Phase Equilib., 21, 371-78(2000). [doi:10.1361/105497100770339905](https://doi.org/10.1361/105497100770339905) | `d4504e582665577ae0efbb4b30c0f0d18a58aa7b8874740f1602267a9bba34ae` | [viewer](https://orchid-project.org/phase-diagrams/#FE-ZN/FeZn-00Reu-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeZn-00Reu-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeZn-00Reu-LB.json) |
| FeZn-01Su.tdb | X. Su, N.-Y. Tang, J.M. Toguri, J. Alloys Compd., 325, 129-36(2001). [doi:10.1016/S0925-8388(01)01273-7](https://doi.org/10.1016/S0925-8388%2801%2901273-7) | `7ec69901e59741d29ef1ccf1b70dd7ab343781ae0b78dcff5d66479170d0efd5` | [viewer](https://orchid-project.org/phase-diagrams/#FE-ZN/FeZn-01Su.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeZn-01Su.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeZn-01Su.json) |
| FeZn-05Su.tdb | X. Su, F. Yin, Z. Li, N.-Y. Tang, M. Zhao, J. Alloys Compd., 396, 156-63(2005). [doi:10.1016/j.jallcom.2004.12.031](https://doi.org/10.1016/j.jallcom.2004.12.031) | `7315dc671e2b7ec86810fcab9f43e86d9e07d50fb798ccf496064180bc827e4e` | [viewer](https://orchid-project.org/phase-diagrams/#FE-ZN/FeZn-05Su.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeZn-05Su.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeZn-05Su.json) |
| FeZn-09Xio.tdb | W. Xiong, Y. Kong, Y. Du, Z.-K. Liu, M. Selleby, W.-H. Sun, Calphad, 33, 433-40(2009). [doi:10.1016/j.calphad.2009.01.002](https://doi.org/10.1016/j.calphad.2009.01.002) | `adfbe318ba501357566f35b08ed8124470a9a7657ee9756cad9d44f35937244f` | [viewer](https://orchid-project.org/phase-diagrams/#FE-ZN/FeZn-09Xio.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeZn-09Xio.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeZn-09Xio.json) |
| FeZn-11Tan.tdb | Y. Tang, X. Yuan, Y. Du, W. Xiong, J. Mining Metall. B, 47, 1-10(2011). [doi:10.2298/JMMB1101001T](https://doi.org/10.2298/JMMB1101001T) | `fd6a097e34a77fe39eb5bc9ac59775076e347f488bc4c64960bfc05d926ec7b6` | [viewer](https://orchid-project.org/phase-diagrams/#FE-ZN/FeZn-11Tan.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeZn-11Tan.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeZn-11Tan.json) |

Table: Calculated three-phase invariants (model, mole fraction of the second component)

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| FeZn-00Reu-LB.tdb | 1056.68 | BCC_A2 (x(Zn) 0.39797) + FE3ZN7_D82 (x(Zn) 0.75492) + LIQUID (x(Zn) 0.93449) |
| FeZn-00Reu-LB.tdb | 944.41 | FE3ZN7_D82 (x(Zn) 0.80708) + FEZN10 (x(Zn) 0.86138) + LIQUID (x(Zn) 0.98286) |
| FeZn-00Reu-LB.tdb | 822.52 | FE3ZN7_D82 (x(Zn) 0.7549) + FEZN4 (x(Zn) 0.79351) + FEZN10 (x(Zn) 0.86713) |
| FeZn-00Reu-LB.tdb | 805.07 | FEZN10 (x(Zn) 0.89688) + FEZN13 (x(Zn) 0.92788) + LIQUID (x(Zn) 0.99898) |
| FeZn-00Reu-LB.tdb | 692.86 | FEZN13 (x(Zn) 0.94125) + HCP_A3 (x(Zn) 0.99965) + LIQUID (x(Zn) 0.99998) |
| FeZn-00Reu-LB.tdb | 692.86 | FEZN13 (x(Zn) 0.94125) + HCP_A3 (x(Zn) 0.99965) + LIQUID (x(Zn) 0.99998) |
| FeZn-01Su.tdb | 1293.09 | BCC_A2 (x(Zn) 0.2455) + FCC_A1 (x(Zn) 0.28294) + LIQUID (x(Zn) 0.83845) |
| FeZn-01Su.tdb | 1084.45 | BCC_A2 (x(Zn) 0.3767) + FCC_A1 (x(Zn) 0.40105) + LIQUID (x(Zn) 0.90491) |
| FeZn-01Su.tdb | 1056.65 | BCC_A2 (x(Zn) 0.43043) + FE3ZN7_D82 (x(Zn) 0.72983) + LIQUID (x(Zn) 0.91088) |
| FeZn-01Su.tdb | 944.98 | FE3ZN7_D82 (x(Zn) 0.80681) + FEZN10 (x(Zn) 0.86925) + LIQUID (x(Zn) 0.96352) |
| FeZn-01Su.tdb | 823.01 | FE3ZN7_D82 (x(Zn) 0.77836) + FEZN4 (x(Zn) 0.80104) + FEZN10 (x(Zn) 0.86873) |
| FeZn-01Su.tdb | 803 | FEZN10 (x(Zn) 0.91423) + FEZN13 (x(Zn) 0.92857) + LIQUID (x(Zn) 0.99674) |
| FeZn-01Su.tdb | 692.98 | FEZN13 (x(Zn) 0.92857) + HCP_A3 (x(Zn) 0.99932) + LIQUID (x(Zn) 0.99988) |
| FeZn-05Su.tdb | 1626.17 | BCC_A2 (x(Zn) 0.15457) + FCC_A1 (x(Zn) 0.16221) + LIQUID (x(Zn) 0.33479) |
| FeZn-05Su.tdb | 1559.32 | BCC_A2 (x(Zn) 0.19087) + FCC_A1 (x(Zn) 0.19727) + LIQUID (x(Zn) 0.54784) |
| FeZn-05Su.tdb | 1056.51 | BCC_A2 (x(Zn) 0.42929) + FE3ZN7_D82 (x(Zn) 0.73198) + LIQUID (x(Zn) 0.89938) |
| FeZn-05Su.tdb | 944.85 | FE3ZN7_D82 (x(Zn) 0.80575) + FEZN10 (x(Zn) 0.86406) + LIQUID (x(Zn) 0.96012) |
| FeZn-05Su.tdb | 823.01 | FE3ZN7_D82 (x(Zn) 0.77439) + FEZN4 (x(Zn) 0.80068) + FEZN10 (x(Zn) 0.86404) |
| FeZn-05Su.tdb | 802.96 | FEZN10 (x(Zn) 0.91276) + FEZN13 (x(Zn) 0.92857) + LIQUID (x(Zn) 0.99638) |
| FeZn-05Su.tdb | 692.66 | FEZN13 (x(Zn) 0.92857) + LIQUID (x(Zn) 0.99989) + HCP_A3 (x(Zn) 0.99992) |
| FeZn-09Xio.tdb | 1055.24 | BCC_A2 (x(Zn) 0.42079) + FE3ZN7_D82 (x(Zn) 0.72043) + LIQUID (x(Zn) 0.91176) |
| FeZn-09Xio.tdb | 941.39 | FE3ZN7_D82 (x(Zn) 0.81554) + FEZN10 (x(Zn) 0.86058) + LIQUID (x(Zn) 0.96248) |
| FeZn-09Xio.tdb | 824.1 | FE3ZN7_D82 (x(Zn) 0.75317) + FEZN4 (x(Zn) 0.81034) + FEZN10 (x(Zn) 0.86082) |
| FeZn-09Xio.tdb | 802.2 | FEZN10 (x(Zn) 0.90832) + FEZN13 (x(Zn) 0.92937) + LIQUID (x(Zn) 0.99631) |
| FeZn-09Xio.tdb | 692.63 | FEZN13 (x(Zn) 0.9388) + LIQUID (x(Zn) 0.99989) + HCP_A3 (x(Zn) 0.99998) |
| FeZn-11Tan.tdb | 1056.62 | BCC_A2 (x(Zn) 0.46428) + FE3ZN7_D82 (x(Zn) 0.73038) + LIQUID (x(Zn) 0.92402) |
| FeZn-11Tan.tdb | 945.49 | FE3ZN7_D82 (x(Zn) 0.80023) + FEZN10 (x(Zn) 0.8635) + LIQUID (x(Zn) 0.96952) |
| FeZn-11Tan.tdb | 823.96 | FE3ZN7_D82 (x(Zn) 0.75961) + FEZN4 (x(Zn) 0.80199) + FEZN10 (x(Zn) 0.86538) |
| FeZn-11Tan.tdb | 802.64 | FEZN10 (x(Zn) 0.91341) + FEZN13 (x(Zn) 0.92938) + LIQUID (x(Zn) 0.99748) |
| FeZn-11Tan.tdb | 692.65 | FEZN13 (x(Zn) 0.93876) + LIQUID (x(Zn) 0.99993) + HCP_A3 (x(Zn) 0.99998) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/FE/FE-ZN.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/FE/FE-ZN.json) · [CALPHAD hull FeZn-00Reu-LB](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-ZN--FeZn-00Reu-LB.json) · [CALPHAD hull FeZn-01Su](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-ZN--FeZn-01Su.json) · [CALPHAD hull FeZn-05Su](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-ZN--FeZn-05Su.json) · [CALPHAD hull FeZn-09Xio](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-ZN--FeZn-09Xio.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Fe–Zn system (70)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1055.15 | (αFe)+L -> Γ | (αFe): Zn 0.42; L: Zn 0.92; Γ: Zn 0.72 | experimental | [1] Tang 2011; _cites Gellings 1980_ [doi](https://doi.org/10.1515/ijmr-1980-710303) | Table 3, p. 7, row 3; `ORC-22UFYYPI27` |  |
| 1055.15 | peritectic: (αFe) + L = Γ | (αFe): Zn 0.42; L: Zn 0.92; Γ: Zn 0.72 | model | [2] Xiong 2009; _cites Burton 1993_ | Table 5, p. 6, row 6; `ORC-4H3SMVUVPE` |  |
| 1055.15 | L + α-Fe(b.c.c.) -> Γ | L: Zn 0.912; α-Fe(b.c.c.): Zn 0.415; Γ: Zn 0.732 | model | [3] Su 2001 | Table 2, p. 5, row 1; `ORC-4XVMDI3HSW` |  |
| 1055.15 | peritectic: (αFe) + L = Γ | (αFe): Zn 0.418; L: Zn 0.918; Γ: Zn 0.721 | model | [2] Xiong 2009; _cites Conclusions_ | Table 5, p. 6, row 2; `ORC-57LIAQ557C` |  |
| 1055.15 | L + α-Fe(b.c.c.) -> Γ | L: Zn 0.92; α-Fe(b.c.c.): Zn 0.42; Γ: Zn 0.72 | experimental | [3] Su 2001; _cites Burton 1993_ | Table 2, p. 5, row 2; `ORC-6UYE2NBN54` |  |
| 1055.15 | peritectic: (αFe) + L = Γ | (αFe): Zn 0.42; L: Zn 0.92; Γ: Zn 0.72 | model | [2] Xiong 2009; _cites Kubaschewski 1982_ | Table 5, p. 6, row 5; `ORC-B4OFMOSCLB` |  |
| 1055.15 | L + α-Fe(b.c.c.) -> Γ | Γ: Fe 0.3, Zn 0.7 | unspecified | [3] Su 2001; _cites Gellings 1980_ | Table 2, p. 5, row 3; `ORC-KLSD6GPSF2` |  |
| 1055.15 | (αFe)+L -> Γ | (αFe): Zn 0.423; L: Zn 0.92; Γ: Zn 0.726 | model | [1] Tang 2011; _cites Xiong 2009_ [doi](https://doi.org/10.1016/j.calphad.2009.01.002) | Table 3, p. 7, row 2; `ORC-LOR4B7S4CG` |  |
| 1055.15 | peritectic: (αFe) + L = Γ | (αFe): Zn 0.423; L: Zn 0.92; Γ: Zn 0.726 | model | [2] Xiong 2009 | Table 5, p. 6, row 1; `ORC-NKRQV4PF5Y` |  |
| 1055.15 | L + α-Fe(b.c.c.) -> Γ | Γ: Fe 0.3, Zn 0.7 | experimental | [3] Su 2001; _cites Truesdale 1936_ | Table 2, p. 5, row 4; `ORC-PBZC3QAGFB` |  |
| 1055.15 | peritectic: (αFe) + L = Γ | Γ: Fe 0.3, Zn 0.7 | experimental | [2] Xiong 2009; _cites Gellings 1980_ | Table 5, p. 6, row 4; `ORC-PXM5U6QAPT` |  |
| 1055.15 | (αFe)+L -> Γ | (αFe): Zn 0.432; L: Zn 0.9249; Γ: Zn 0.7316 | model | [1] Tang 2011 | Table 3, p. 7, row 1; `ORC-TNRRCYGA3E` |  |
| 1055.15 | peritectic: (αFe) + L = Γ | (αFe): Zn 0.415; L: Zn 0.912; Γ: Zn 0.732 | model | [2] Xiong 2009; _cites Su 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901273-7) | Table 5, p. 6, row 3; `ORC-UHWKUCOGHR` |  |
| 1038.15 | L + α-Fe(b.c.c.) -> Γ | Γ: Fe 0.3, Zn 0.7 | experimental | [3] Su 2001; _cites Hansen 1936_ | Table 2, p. 5, row 5; `ORC-54JI6KXOIM` |  |
| 945.15 | L + Γ -> δ | Γ: Fe 0.3, Zn 0.7; δ: Fe 0.090909, Zn 0.909091 | experimental | [3] Su 2001; _cites Truesdale 1936_ | Table 2, p. 5, row 10; `ORC-344UBE3TKM` |  |
| 945.15 | peritectic: Γ + L = δ | Γ: Fe 0.3, Zn 0.7; δ: Fe 0.090909, Zn 0.909091 | experimental | [2] Xiong 2009; _cites Schramm 1936_ | Table 5, p. 6, row 10; `ORC-4LCN2I4WWE` |  |
| 945.15 | L + Γ -> δ | Γ: Fe 0.3, Zn 0.7; δ: Fe 0.090909, Zn 0.909091 | unspecified | [3] Su 2001; _cites Gellings 1980_ | Table 2, p. 5, row 8; `ORC-52RUZBFJPJ` |  |
| 945.15 | peritectic: Γ + L = δ | Γ: Zn 0.825; L: Zn 0.965; δ: Zn 0.865 | model | [2] Xiong 2009; _cites Burton 1993_ | Table 5, p. 6, row 13; `ORC-ENWGNLLJO4` |  |
| 945.15 | L+Γ -> δ | L: Zn 0.965; Γ: Zn 0.825; δ: Zn 0.865 | experimental | [1] Tang 2011; _cites Gellings 1980_ [doi](https://doi.org/10.1515/ijmr-1980-710303) | Table 3, p. 7, row 6; `ORC-FRKUDYFKEV` |  |
| 945.15 | peritectic: Γ + L = δ | Γ: Zn 0.825; L: Zn 0.964; δ: Zn 0.866 | model | [2] Xiong 2009; _cites Conclusions_ | Table 5, p. 6, row 8; `ORC-G4TF5WRI6H` |  |
| 945.15 | L+Γ -> δ | L: Zn 0.9697; Γ: Zn 0.8022; δ: Zn 0.8636 | model | [1] Tang 2011 | Table 3, p. 7, row 4; `ORC-HXYHNMYUF4` |  |
| 945.15 | peritectic: Γ + L = δ | Γ: Fe 0.3, Zn 0.7; δ: Fe 0.090909, Zn 0.909091 | experimental | [2] Xiong 2009; _cites Gellings 1980_ | Table 5, p. 6, row 11; `ORC-U2JCSVJ2ZF` |  |
| 945.15 | L + Γ -> δ | L: Zn 0.964; Γ: Zn 0.807; δ: Zn 0.869 | model | [3] Su 2001 | Table 2, p. 5, row 6; `ORC-UF2UPPD3KK` |  |
| 945.15 | peritectic: Γ + L = δ | Γ: Zn 0.807; L: Zn 0.964; δ: Zn 0.869 | model | [2] Xiong 2009; _cites Su 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901273-7) | Table 5, p. 6, row 9; `ORC-W3CZ7LBYB6` |  |
| 945.15 | L + Γ -> δ | Γ: Fe 0.3, Zn 0.7; δ: Fe 0.090909, Zn 0.909091 | experimental | [3] Su 2001; _cites Schramm 1936_ | Table 2, p. 5, row 9; `ORC-YJ6XQPGNOM` |  |
| 945.15 | L + Γ -> δ | L: Zn 0.965; Γ: Zn 0.813; δ: Zn 0.87 | experimental | [3] Su 2001; _cites Burton 1993_ | Table 2, p. 5, row 7; `ORC-YPFQHSS2ZO` |  |
| 941.15 | peritectic: Γ + L = δ | Γ: Zn 0.827; L: Zn 0.973; δ: Zn 0.856 | model | [2] Xiong 2009 | Table 5, p. 6, row 7; `ORC-5HI663YDEV` |  |
| 941.15 | L+Γ -> δ | L: Zn 0.973; Γ: Zn 0.827; δ: Zn 0.856 | model | [1] Tang 2011; _cites Xiong 2009_ [doi](https://doi.org/10.1016/j.calphad.2009.01.002) | Table 3, p. 7, row 5; `ORC-XPQPAP2W2D` |  |
| 938.15 | peritectic: Γ + L = δ | Γ: Zn 0.825; L: Zn 0.975; δ: Zn 0.865 | model | [2] Xiong 2009; _cites Kubaschewski 1982_ | Table 5, p. 6, row 12; `ORC-XW5JG5JGDN` |  |
| 920.15 | L + Γ -> δ | Γ: Fe 0.3, Zn 0.7; δ: Fe 0.090909, Zn 0.909091 | experimental | [3] Su 2001; _cites Hansen 1936_ | Table 2, p. 5, row 11; `ORC-RCY2EWFWBZ` |  |
| 823.85 | Γ+δ -> Γ1 | Γ: Zn 0.7597; δ: Zn 0.8654; Γ1: Zn 0.802 | model | [1] Tang 2011 | Table 3, p. 7, row 7; `ORC-4UWJ6T57YQ` |  |
| 823.15 | Γ+δ -> Γ1 | Γ: Zn 0.765; δ: Zn 0.865; Γ1: Zn 0.81 | experimental | [1] Tang 2011; _cites Gellings 1980_ [doi](https://doi.org/10.1515/ijmr-1980-710303) | Table 3, p. 7, row 9; `ORC-5GMZNRQHMW` |  |
| 823.15 | peritectoid: Γ + δ = Γ1 | Γ: Zn 0.765; δ: Zn 0.865; Γ1: Zn 0.81 | model | [2] Xiong 2009; _cites Kubaschewski 1982_ | Table 5, p. 6, row 18; `ORC-6W6YK5K54Z` |  |
| 823.15 | Γ + δ -> Γ1 | Γ: Zn 0.778; δ: Zn 0.801; Γ1: Zn 0.869 | model | [3] Su 2001 | Table 2, p. 5, row 21; `ORC-7AUOQCTPBV` |  |
| 823.15 | peritectoid: Γ + δ = Γ1 | Γ: Zn 0.768; δ: Zn 0.856; Γ1: Zn 0.81 | model | [2] Xiong 2009 | Table 5, p. 6, row 14; `ORC-BEDPMUYY6V` |  |
| 823.15 | peritectoid: Γ + δ = Γ1 | Γ: Fe 0.3, Zn 0.7; δ: Fe 0.090909, Zn 0.909091; Γ1: Fe 0.2, Zn 0.8 | experimental | [2] Xiong 2009; _cites Gellings 1980_ | Table 5, p. 6, row 17; `ORC-HGHAYUAYMW` |  |
| 823.15 | Γ + δ -> Γ1 | Γ: Fe 0.3, Zn 0.7; δ: Fe 0.090909, Zn 0.909091; Γ1: Fe 0.2, Zn 0.8 | unspecified | [3] Su 2001; _cites Gellings 1980_ | Table 2, p. 5, row 23; `ORC-HYGH763GP7` |  |
| 823.15 | Γ + δ -> Γ1 | Γ: Fe 0.3, Zn 0.7; δ: Fe 0.090909, Zn 0.909091; Γ1: Fe 0.2, Zn 0.8 | experimental | [3] Su 2001; _cites Burton 1993_ | Table 2, p. 5, row 22; `ORC-NWZZGJUNGX` |  |
| 823.15 | peritectoid: Γ + δ = Γ1 | Γ: Zn 0.766; δ: Zn 0.865; Γ1: Zn 0.809 | model | [2] Xiong 2009; _cites Conclusions_ | Table 5, p. 6, row 15; `ORC-OWWAPCMHTQ` |  |
| 823.15 | peritectoid: Γ + δ = Γ1 | Γ: Zn 0.778; δ: Zn 0.869; Γ1: Zn 0.801 | model | [2] Xiong 2009; _cites Su 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901273-7) | Table 5, p. 6, row 16; `ORC-T6EO2N3UA4` |  |
| 823.15 | Γ+δ -> Γ1 | Γ: Zn 0.768; δ: Zn 0.856; Γ1: Zn 0.81 | model | [1] Tang 2011; _cites Xiong 2009_ [doi](https://doi.org/10.1016/j.calphad.2009.01.002) | Table 3, p. 7, row 8; `ORC-V5D7EXCXGL` |  |
| 823.15 | peritectoid: Γ + δ = Γ1 | Γ: Zn 0.765; δ: Zn 0.865; Γ1: Zn 0.81 | model | [2] Xiong 2009; _cites Burton 1993_ | Table 5, p. 6, row 19; `ORC-XBVAMZIYCG` |  |
| 803.85 | δ+L -> ζ | δ: Zn 0.913; L: Zn 0.9974; ζ: Zn 0.9294 | model | [1] Tang 2011 | Table 3, p. 7, row 10; `ORC-U35JI6VHUR` |  |
| 803.15 | δ+L -> ζ | δ: Zn 0.92; L: Zn 0.995; ζ: Zn 0.927 | experimental | [1] Tang 2011; _cites Gellings 1980_ [doi](https://doi.org/10.1515/ijmr-1980-710303) | Table 3, p. 7, row 12; `ORC-2NZQ4XQ43A` |  |
| 803.15 | L + δ -> ζ | δ: Fe 0.090909, Zn 0.909091; ζ: Fe 0.071429, Zn 0.928571 | experimental | [3] Su 2001; _cites Schramm 1936_ | Table 2, p. 5, row 15; `ORC-3EDJD64YDY` |  |
| 803.15 | peritectic: δ + L = ζ | δ: Fe 0.090909, Zn 0.909091; ζ: Fe 0.071429, Zn 0.928571 | experimental | [2] Xiong 2009; _cites Gellings 1980_ | Table 5, p. 6, row 24; `ORC-6U3WS3F3DX` |  |
| 803.15 | peritectic: δ + L = ζ | δ: Zn 0.92; L: Zn 0.995; ζ: Zn 0.927 | model | [2] Xiong 2009; _cites Kubaschewski 1982_ | Table 5, p. 6, row 25; `ORC-7QC6ZNQ3K5` |  |
| 803.15 | peritectic: δ + L = ζ | δ: Zn 0.914; L: Zn 0.996; ζ: Zn 0.928 | model | [2] Xiong 2009; _cites Conclusions_ | Table 5, p. 6, row 21; `ORC-EF2JZUGUHO` |  |
| 803.15 | L + δ -> ζ | δ: Fe 0.090909, Zn 0.909091; ζ: Fe 0.071429, Zn 0.928571 | unspecified | [3] Su 2001; _cites Gellings 1980_ | Table 2, p. 5, row 14; `ORC-MV4FYUGRD2` |  |
| 803.15 | L + δ -> ζ | δ: Fe 0.090909, Zn 0.909091; ζ: Fe 0.071429, Zn 0.928571 | experimental | [3] Su 2001; _cites Burton 1993_ | Table 2, p. 5, row 13; `ORC-OMXXHC5R2A` |  |
| 803.15 | peritectic: δ + L = ζ | δ: Zn 0.914; L: Zn 0.996; ζ: Zn 0.929 | model | [2] Xiong 2009; _cites Su 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901273-7) | Table 5, p. 6, row 22; `ORC-RIMDGHQM5D` |  |
| 803.15 | L + δ -> ζ | L: Zn 0.997; δ: Zn 0.914; ζ: Fe 0.071429, Zn 0.928571 | model | [3] Su 2001 | Table 2, p. 5, row 12; `ORC-W2YFN6RYDK` |  |
| 803.15 | peritectic: δ + L = ζ | δ: Fe 0.090909, Zn 0.909091; ζ: Fe 0.071429, Zn 0.928571 | experimental | [2] Xiong 2009; _cites Schramm 1936_ | Table 5, p. 6, row 23; `ORC-WXQEBP7ADK` |  |
| 799.15 | δ+L -> ζ | δ: Zn 0.914; L: Zn 0.9985; ζ: Zn 0.93 | model | [1] Tang 2011; _cites Xiong 2009_ [doi](https://doi.org/10.1016/j.calphad.2009.01.002) | Table 3, p. 7, row 11; `ORC-GGED4GDZGI` |  |
| 799.15 | peritectic: δ + L = ζ | δ: Zn 0.914; L: Zn 0.9985; ζ: Zn 0.93 | model | [2] Xiong 2009 | Table 5, p. 6, row 20; `ORC-UTGQKX5OKV` |  |
| 692.68 | eutectic: L = ζ + (Zn) | L: Zn 0.99989; ζ: Zn 0.94; (Zn): Zn 1 | model | [2] Xiong 2009; _cites Kubaschewski 1982_ | Table 5, p. 6, row 32; `ORC-OGLIYFKYC7` |  |
| 692.65 | eutectic: L = ζ + (Zn) | L: Zn 0.9995; ζ: Zn 0.944; (Zn): Zn 0.999899 | model | [2] Xiong 2009; _cites Conclusions_ | Table 5, p. 6, row 27; `ORC-BZRGDK2CXW` |  |
| 692.65 | L+ζ -> (Zn) | L: Zn 0.99998; ζ: Zn 0.939; (Zn): Zn 0.999886 | model | [1] Tang 2011; _cites Xiong 2009_ [doi](https://doi.org/10.1016/j.calphad.2009.01.002) | Table 3, p. 7, row 14; `ORC-MAZANCQVQ6` |  |
| 692.65 | L+ζ -> (Zn) | L: Zn 0.99988; ζ: Zn 0.9388; (Zn): Zn 0.999886 | model | [1] Tang 2011 | Table 3, p. 7, row 13; `ORC-PAYVTX4YSI` |  |
| 692.63 | eutectic: L = ζ + (Zn) | L: Zn 0.999981; ζ: Zn 0.939; (Zn): Zn 0.999886 | model | [2] Xiong 2009 | Table 5, p. 6, row 26; `ORC-V7CM4FSGHZ` |  |
| 692.61 | eutectic: L = ζ + (Zn) | L: Zn 0.999878; ζ: Zn 0.929; (Zn): Zn 1 | model | [2] Xiong 2009; _cites Su 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901273-7) | Table 5, p. 6, row 28; `ORC-BONMLLF3HH` |  |
| 692.6 | eutectic: L -> ζ + Zn(h.c.p.) | L: Zn 0.9999; ζ: Fe 0.071429, Zn 0.928571 | model | [3] Su 2001 | Table 2, p. 5, row 16; `ORC-BMCX2NRRQH` |  |
| 692.55 | eutectic: L = ζ + (Zn) | ζ: Fe 0.071429, Zn 0.928571 | experimental | [2] Xiong 2009; _cites Gellings 1980_ | Table 5, p. 6, row 31; `ORC-3K2JT5T4AT` |  |
| 692.55 | eutectic: L -> ζ + Zn(h.c.p.) | ζ: Fe 0.071429, Zn 0.928571 | unspecified | [3] Su 2001; _cites Gellings 1980_ | Table 2, p. 5, row 18; `ORC-BZ2KC2CDFG` |  |
| 692.55 | eutectic: L = ζ + (Zn) | ζ: Fe 0.071429, Zn 0.928571 | experimental | [2] Xiong 2009; _cites Schramm 1936_ | Table 5, p. 6, row 30; `ORC-C3NGD3YJKQ` |  |
| 692.55 | eutectic: L -> ζ + Zn(h.c.p.) | ζ: Fe 0.071429, Zn 0.928571 | experimental | [3] Su 2001; _cites Schramm 1936_ | Table 2, p. 5, row 19; `ORC-DVHRJP4QF3` |  |
| 692.55 | eutectic: L -> ζ + Zn(h.c.p.) | L: Zn 0.9998; ζ: Fe 0.071429, Zn 0.928571 | experimental | [3] Su 2001; _cites Truesdale 1936_ | Table 2, p. 5, row 20; `ORC-ETA3HZ7AA5` |  |
| 692.55 | eutectic: L = ζ + (Zn) | L: Zn 0.99979; ζ: Fe 0.071429, Zn 0.928571; (Zn): Zn 0.99997 | experimental | [2] Xiong 2009; _cites Truesdale 1936_ | Table 5, p. 6, row 29; `ORC-OLJHNUKTCO` |  |
| 692.55 | eutectic: L -> ζ + Zn(h.c.p.) | ζ: Fe 0.071429, Zn 0.928571 | experimental | [3] Su 2001; _cites Burton 1993_ | Table 2, p. 5, row 17; `ORC-W6CKSEE5BW` |  |
| 692.55 | L+ζ -> (Zn) | L: Zn 0.99989; ζ: Zn 0.94; (Zn): Zn 1 | experimental | [1] Tang 2011; _cites Gellings 1980_ [doi](https://doi.org/10.1515/ijmr-1980-710303) | Table 3, p. 7, row 15; `ORC-WPLGLDFRM3` |  |

## 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](https://data.orchid-project.org/literature/dft_parity.json).

Table: Enthalpies of formation, Fe–Zn system (12)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Γ1 |  | -11.258 kJ/mol (basis unstated) | 298.15 | model |  |  | [4] Reumont 2000 | Table 1, p. 5, row 2; `ORC-WES64M5M4G` |  |
| Γ1 |  | -11.125 kJ/mol (basis unstated) | 773 | model |  |  | [4] Reumont 2000 | Table 1, p. 5, row 3; `ORC-VE2BWNFY74` |  |
| Γ1 |  | -10.884 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [4] Reumont 2000; _cites Reutner 1980_ [doi](https://doi.org/10.1002/srin.198004874) | Table 1, p. 5, row 1; `ORC-CRMYZIZ5JB` |  |
| Γ2 |  | -11.872 kJ/mol (basis unstated) | 298.15 | model |  |  | [4] Reumont 2000 | Table 1, p. 5, row 8; `ORC-VIBOQTR3BR` |  |
| Γ2 |  | -11.765 kJ/mol (basis unstated) | 773 | model |  |  | [4] Reumont 2000 | Table 1, p. 5, row 9; `ORC-LU6Y6VTEIR` |  |
| Γ2 |  | -11.764 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [4] Reumont 2000; _cites Reutner 1980_ [doi](https://doi.org/10.1002/srin.198004874) | Table 1, p. 5, row 7; `ORC-LOO4LSLAEH` |  |
| δ1 |  | -11.479 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [4] Reumont 2000; _cites Reutner 1980_ [doi](https://doi.org/10.1002/srin.198004874) | Table 1, p. 5, row 13; `ORC-DRYWQVUXFR` |  |
| δ1 |  | -10.358 kJ/mol (basis unstated) | 773 | model |  |  | [4] Reumont 2000 | Table 1, p. 5, row 15; `ORC-FBWH3Z7CYZ` |  |
| δ1 |  | -10.069 kJ/mol (basis unstated) | 298.15 | model |  |  | [4] Reumont 2000 | Table 1, p. 5, row 14; `ORC-QQR6M2A3LX` |  |
| ζ |  | -11.672 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [4] Reumont 2000; _cites Reutner 1980_ [doi](https://doi.org/10.1002/srin.198004874) | Table 1, p. 5, row 19; `ORC-C2QHRH75GE` |  |
| ζ |  | -9.031 kJ/mol (basis unstated) | 773 | model |  |  | [4] Reumont 2000 | Table 1, p. 5, row 21; `ORC-IRX4V2VHYQ` |  |
| ζ |  | -9.008 kJ/mol (basis unstated) | 298.15 | model |  |  | [4] Reumont 2000 | Table 1, p. 5, row 20; `ORC-6H3DTKSVCF` |  |

## Other properties

### Formation (30)

Table: Formation, Fe–Zn system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Entropy of formation; _printed: ΔfS(Γ1)_ | -9.41 J/mol (basis unstated)/K | 298.15 | Γ1; _alloy: Fe 0.31, Zn 0.69_ | model | [4] Reumont 2000 | Table 1, p. 5, row 5; `ORC-GHQF6H6L3C` |  |
| Entropy of formation; _printed: ΔfS(Γ1)_ | -9.166 J/mol (basis unstated)/K | 298.15 | Γ1; _alloy: Fe 0.25, Zn 0.75_ | experimental | [4] Reumont 2000; _cites Reutner 1980_ [doi](https://doi.org/10.1002/srin.198004874) | Table 1, p. 5, row 4; `ORC-NEWAWV5T3K` |  |
| Entropy of formation; _printed: ΔfS(Γ2)_ | -10.634 J/mol (basis unstated)/K | 298.15 | Γ2; _alloy: Fe 0.2, Zn 0.8_ | experimental | [4] Reumont 2000; _cites Reutner 1980_ [doi](https://doi.org/10.1002/srin.198004874) | Table 1, p. 5, row 10; `ORC-EGARVS3KVJ` |  |
| Entropy of formation; _printed: ΔfS(Γ2)_ | -10.47 J/mol (basis unstated)/K | 298.15 | Γ2; _alloy: Fe 0.21, Zn 0.79_ | model | [4] Reumont 2000 | Table 1, p. 5, row 11; `ORC-V2B6YS6QCW` |  |
| Entropy of formation; _printed: ΔfS(δ1)_ | -9.24 J/mol (basis unstated)/K | 298.15 | δ1; _alloy: Fe 0.12, Zn 0.88_ | model | [4] Reumont 2000 | Table 1, p. 5, row 17; `ORC-EF3BMR2FRF` |  |
| Entropy of formation; _printed: ΔfS(δ1)_ | -11.08 J/mol (basis unstated)/K | 298.15 | δ1; _alloy: Fe 0.1, Zn 0.9_ | experimental | [4] Reumont 2000; _cites Reutner 1980_ [doi](https://doi.org/10.1002/srin.198004874) | Table 1, p. 5, row 16; `ORC-R65VCQULH2` |  |
| Entropy of formation; _printed: ΔfS(ζ)_ | -9.19 J/mol (basis unstated)/K | 298.15 | ζ; _alloy: Fe 0.08, Zn 0.92_ | model | [4] Reumont 2000 | Table 1, p. 5, row 23; `ORC-A53AX4SJPH` |  |
| Entropy of formation; _printed: ΔfS(ζ)_ | -12.22 J/mol (basis unstated)/K | 298.15 | ζ; _alloy: Fe 0.07, Zn 0.93_ | experimental | [4] Reumont 2000; _cites Reutner 1980_ [doi](https://doi.org/10.1002/srin.198004874) | Table 1, p. 5, row 22; `ORC-XOQRZO5H2D` |  |
| Entropy of formation; _printed: ΔfS(Γ1)_ | -9.3 J/mol (basis unstated)/K | 773 | Γ1; _alloy: Fe 0.3, Zn 0.7_ | model | [4] Reumont 2000 | Table 1, p. 5, row 6; `ORC-KPSHOXWE3N` |  |
| Entropy of formation; _printed: ΔfS(Γ2)_ | -10.63 J/mol (basis unstated)/K | 773 | Γ2; _alloy: Fe 0.24, Zn 0.76_ | model | [4] Reumont 2000 | Table 1, p. 5, row 12; `ORC-2EQR7SJ6CL` |  |
| Entropy of formation; _printed: ΔfS(δ1)_ | -9.65 J/mol (basis unstated)/K | 773 | δ1; _alloy: Fe 0.125, Zn 0.875_ | model | [4] Reumont 2000 | Table 1, p. 5, row 18; `ORC-AO5VLX3MK6` |  |
| Entropy of formation; _printed: ΔfS(ζ)_ | -9.33 J/mol (basis unstated)/K | 773 | ζ; _alloy: Fe 0.07, Zn 0.93_ | model | [4] Reumont 2000 | Table 1, p. 5, row 24; `ORC-GFBN2QNRP6` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -4.8 kJ/mol (basis unstated) | 617 | Γ1; _alloy: Fe 0.25, Zn 0.75_ | model | [4] Reumont 2000; _cites Petersen 1988_ [doi](https://doi.org/10.1016/0040-6031%2888%2987199-5) | Table 2, p. 6, row 3; `ORC-6YFUHOTM24` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -5.2 kJ/mol (basis unstated) | 617 | Γ1; _alloy: Fe 0.25, Zn 0.75_ | unspecified | [4] Reumont 2000; _cites Dauphin 1987_ | Table 2, p. 6, row 2; `ORC-O6JSN6DZL3` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -5.9 kJ/mol (basis unstated) | 617 | Γ1; _alloy: Fe 0.25, Zn 0.75_ | unspecified | [4] Reumont 2000; _cites Costa 2000_ | Table 2, p. 6, row 4; `ORC-SLE4RWYA45` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -5.2 kJ/mol (basis unstated) ± 2 | 617 | Γ1; _alloy: Fe 0.25, Zn 0.75_ | unspecified | [4] Reumont 2000; _cites Gellings 1980_ | Table 2, p. 6, row 1; `ORC-VXXVMCK5OI` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -4.9 kJ/mol (basis unstated) | 617 | Γ1; _alloy: Fe 0.25, Zn 0.75_ | model | [4] Reumont 2000 | Table 2, p. 6, row 5; `ORC-YBZ6OFA53O` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -5.5 kJ/mol (basis unstated) ± 2 | 617 | Γ2; _alloy: Fe 0.2, Zn 0.8_ | unspecified | [4] Reumont 2000; _cites Gellings 1980_ | Table 2, p. 6, row 6; `ORC-666LL7JVBG` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -4.8 kJ/mol (basis unstated) | 617 | Γ2; _alloy: Fe 0.2, Zn 0.8_ | model | [4] Reumont 2000 | Table 2, p. 6, row 8; `ORC-MZ64VHMIHX` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -5.2 kJ/mol (basis unstated) | 617 | Γ2; _alloy: Fe 0.2, Zn 0.8_ | unspecified | [4] Reumont 2000; _cites Dauphin 1987_ | Table 2, p. 6, row 7; `ORC-YOLKZFIYFO` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -5.2 kJ/mol (basis unstated) | 617 | δ1; _alloy: Fe 0.1, Zn 0.9_ | model | [4] Reumont 2000; _cites Petersen 1988_ [doi](https://doi.org/10.1016/0040-6031%2888%2987199-5) | Table 2, p. 6, row 11; `ORC-32FRCMRARV` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -4.6 kJ/mol (basis unstated) | 617 | δ1; _alloy: Fe 0.1, Zn 0.9_ | unspecified | [4] Reumont 2000; _cites Dauphin 1987_ | Table 2, p. 6, row 10; `ORC-4O7MASE752` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -5.2 kJ/mol (basis unstated) ± 2 | 617 | δ1; _alloy: Fe 0.1, Zn 0.9_ | unspecified | [4] Reumont 2000; _cites Gellings 1980_ | Table 2, p. 6, row 9; `ORC-BEJYVE74AA` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -5.7 kJ/mol (basis unstated) | 617 | δ1; _alloy: Fe 0.1, Zn 0.9_ | unspecified | [4] Reumont 2000; _cites Costa 2000_ | Table 2, p. 6, row 12; `ORC-DOKN4IM6XW` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -3.6 kJ/mol (basis unstated) | 617 | δ1; _alloy: Fe 0.1, Zn 0.9_ | model | [4] Reumont 2000 | Table 2, p. 6, row 13; `ORC-XUHBVLB4EN` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -3.9 kJ/mol (basis unstated) ± 2 | 617 | ζ; _alloy: Fe 0.07, Zn 0.93_ | unspecified | [4] Reumont 2000; _cites Gellings 1980_ | Table 2, p. 6, row 14; `ORC-2JKOXDNTLT` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -2.5 kJ/mol (basis unstated) | 617 | ζ; _alloy: Fe 0.07, Zn 0.93_ | model | [4] Reumont 2000 | Table 2, p. 6, row 18; `ORC-5LHETXDLH3` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -2 kJ/mol (basis unstated) | 617 | ζ; _alloy: Fe 0.07, Zn 0.93_ | model | [4] Reumont 2000; _cites Petersen 1988_ [doi](https://doi.org/10.1016/0040-6031%2888%2987199-5) | Table 2, p. 6, row 16; `ORC-G7IYISUJVS` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -4.1 kJ/mol (basis unstated) | 617 | ζ; _alloy: Fe 0.07, Zn 0.93_ | unspecified | [4] Reumont 2000; _cites Dauphin 1987_ | Table 2, p. 6, row 15; `ORC-HEHK5XG4V7` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -4.3 kJ/mol (basis unstated) | 617 | ζ; _alloy: Fe 0.07, Zn 0.93_ | unspecified | [4] Reumont 2000; _cites Costa 2000_ | Table 2, p. 6, row 17; `ORC-XLKKSAI66P` |  |

### Activity / EMF / Gibbs energy (1)

Table: Activity / EMF / Gibbs energy, Fe–Zn system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Chemical potential; _printed: zinc chemical potential_ | -2 kJ | 1055 |  | experimental | [4] Reumont 2000; _cites Dauphin 1987_ | p. 5; `ORC-35CHNQJ6VL` | “The agreement with the graphical estimation of \[1987Dau\] is good except the peritectic invariant at 1055 K given as 22 kJ by these authors.” |

### Crystal structure (14)

Table: Crystal structure, Fe–Zn system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 8.994 Å | 298.15 | Γ | experimental | [2] Xiong 2009; _cites Belin 2000_ [doi](https://doi.org/10.1006/jssc.2000.8626) | Table 2, p. 4, row 1; `ORC-VICQND23T2.35cb4d` |  |
| Lattice a | 17.963 Å | 298.15 | Γ1 | experimental | [2] Xiong 2009; _cites Koster 1981_ | Table 2, p. 4, row 2; `ORC-LWU4BXSFTK.4d126e` |  |
| Lattice a | 12.787 Å | 298.15 | δ | experimental | [2] Xiong 2009; _cites Belin 2000_ [doi](https://doi.org/10.1006/jssc.2000.8626) | Table 2, p. 4, row 3; `ORC-FFBODHUSRU.75b830` |  |
| Lattice a | 13.41 Å | 298.15 | ζ | experimental | [2] Xiong 2009; _cites Uwakweh 2000_ [doi](https://doi.org/10.1007/bf02830333) | Table 2, p. 4, row 4; `ORC-KQBLLO2IAM.5475ef` |  |
| Lattice b | 7.606 Å | 298.15 | ζ | experimental | [2] Xiong 2009; _cites Uwakweh 2000_ [doi](https://doi.org/10.1007/bf02830333) | Table 2, p. 4, row 4; `ORC-KQBLLO2IAM.08a103` |  |
| Lattice c | 57.222 Å | 298.15 | δ | experimental | [2] Xiong 2009; _cites Belin 2000_ [doi](https://doi.org/10.1006/jssc.2000.8626) | Table 2, p. 4, row 3; `ORC-FFBODHUSRU.5716e2` |  |
| Lattice c | 5.076 Å | 298.15 | ζ | experimental | [2] Xiong 2009; _cites Uwakweh 2000_ [doi](https://doi.org/10.1007/bf02830333) | Table 2, p. 4, row 4; `ORC-KQBLLO2IAM.0de6e9` |  |
| lattice alpha | 90 ° | 298.15 | Γ | experimental | [2] Xiong 2009; _cites Belin 2000_ [doi](https://doi.org/10.1006/jssc.2000.8626) | Table 2, p. 4, row 1; `ORC-VICQND23T2.5e57cd` |  |
| lattice alpha | 90 ° | 298.15 | Γ1 | experimental | [2] Xiong 2009; _cites Koster 1981_ | Table 2, p. 4, row 2; `ORC-LWU4BXSFTK.4a546f` |  |
| lattice alpha | 120 ° | 298.15 | δ | experimental | [2] Xiong 2009; _cites Belin 2000_ [doi](https://doi.org/10.1006/jssc.2000.8626) | Table 2, p. 4, row 3; `ORC-FFBODHUSRU.1b90a2` |  |
| lattice alpha | 90 ° | 298.15 | ζ | experimental | [2] Xiong 2009; _cites Uwakweh 2000_ [doi](https://doi.org/10.1007/bf02830333) | Table 2, p. 4, row 4; `ORC-KQBLLO2IAM.cc44b9` |  |
| lattice beta | 127.3 ° | 298.15 | ζ | experimental | [2] Xiong 2009; _cites Uwakweh 2000_ [doi](https://doi.org/10.1007/bf02830333) | Table 2, p. 4, row 4; `ORC-KQBLLO2IAM.5d178f` |  |
| lattice gamma | 90 ° | 298.15 | δ | experimental | [2] Xiong 2009; _cites Belin 2000_ [doi](https://doi.org/10.1006/jssc.2000.8626) | Table 2, p. 4, row 3; `ORC-FFBODHUSRU.e3ab98` |  |
| lattice gamma | 90 ° | 298.15 | ζ | experimental | [2] Xiong 2009; _cites Uwakweh 2000_ [doi](https://doi.org/10.1007/bf02830333) | Table 2, p. 4, row 4; `ORC-KQBLLO2IAM.550a18` |  |

## Sources

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

1. Y. Tang, X. Yuan, Y. Du, W. Xiong, Thermodynamic modeling of the Fe−Zn system using exponential temperature dependence for the excess Gibbs energy, J min metall B Metall 47, 1-10 (2011). [doi:10.2298/jmmb1101001t](https://doi.org/10.2298/jmmb1101001t)
2. Wei Xiong, Yi Kong, Yong Du, Zi-Kui Liu, Malin Selleby, Wei-Hua Sun, Thermodynamic investigation of the galvanizing systems, I: Refinement of the thermodynamic description for the Fe–Zn system, Calphad 33, 433-440 (2009). [doi:10.1016/j.calphad.2009.01.002](https://doi.org/10.1016/j.calphad.2009.01.002)
3. Xuping Su, Nai-Yong Tang, Jim M. Toguri, Thermodynamic evaluation of the Fe–Zn system, Journal of Alloys and Compounds 325, 129-136 (2001). [doi:10.1016/s0925-8388(01)01273-7](https://doi.org/10.1016/s0925-8388%2801%2901273-7)
4. G. Reumont, P. Perrot, J. M. Fiorani, J. Hertz, Thermodynamic assessment of the Fe-Zn system, JPE 21, 371-378 (2000). [doi:10.1361/105497100770339905](https://doi.org/10.1361/105497100770339905)

## 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). https://doi.org/10.5281/zenodo.23735569
- R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). https://doi.org/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). https://doi.org/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). https://doi.org/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.

```bibtex
@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}
}
```

---

Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite ORCHID ([CITATION.cff](https://data.orchid-project.org/CITATION.cff)) and the original sources. Quotes are short excerpts kept so that each value can be checked; they remain under the publishers' copyright and are not relicensed. Source papers, page images and full text are not redistributed. Field reference: [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt). Found an error? The report link of a value (Markdown: its id, ORC-..., in the Location column) opens a pre-filled GitHub issue, https://github.com/orchid-calphad/orchid-data/issues/new?template=report-value-error.yml&record_id=\<id>, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).