# Fe–Sn system

> Fe–Sn system: 59 accepted literature values (invariant reaction 45, activity / EMF / Gibbs energy 12, formation 2) and 3 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

59 accepted literature values from 3 paper(s) (experimental 45, model 13, DFT 1); 3 calculated phase diagram(s). 8 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-SN.json) · [CSV](https://data.orchid-project.org/systems/FE-SN.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#FE-SN) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#FE-SN/FeSn-10Hua.json) · [phases (10)](https://data.orchid-project.org/phases/pages/FE-SN.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/FE-SN.html) · [Markdown](https://data.orchid-project.org/systems/FE-SN.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 45 |
| model | 13 |
| DFT | 1 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 45 |
| formation | 2 |
| activity / EMF / Gibbs energy | 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.

Table: Assessments with a calculated phase diagram

| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| FeSn-10Hua.tdb | Y.-C. Huang, W. Gierlotka, S.-W. Chen, Intermetallics, 18, 984-91(2010). [doi:10.1016/j.intermet.2010.01.026](https://doi.org/10.1016/j.intermet.2010.01.026) | `a4b20e684dcb573a1b9b3337cb8914ea0738b2d14714bbed897abee7f7608edf` | [viewer](https://orchid-project.org/phase-diagrams/#FE-SN/FeSn-10Hua.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeSn-10Hua.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeSn-10Hua.json) |
| FeSn-20Laf.tdb | P. Lafaye, C. Toffolon-Masclet, J.-C. Crivello, J.-M. Joubert, J. Alloys Compd., 821, 153200(2020). [doi:10.1016/j.jallcom.2019.153200](https://doi.org/10.1016/j.jallcom.2019.153200) | `9fdbfba0e895036aaba4dddb43b21fd1af515ce4809f7fa9a99ecdab0983f9fe` | [viewer](https://orchid-project.org/phase-diagrams/#FE-SN/FeSn-20Laf.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeSn-20Laf.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeSn-20Laf.json) |
| FeSn-96Har-LB.tdb | K.C. Hari Kumar, P. Wollants, L. Delaey, Calphad, 20, 139-49(1996). [doi:10.1016/S0364-5916(96)00021-1](https://doi.org/10.1016/S0364-5916%2896%2900021-1) | `ad3eeabb86656e73cb6a1fac9c6fc98d0339e3aa57eb145163489e2c383a4f01` | [viewer](https://orchid-project.org/phase-diagrams/#FE-SN/FeSn-96Har-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeSn-96Har-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeSn-96Har-LB.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| FeSn-10Hua.tdb | 1395.86 | BCC_A2 (x(Sn) 0.08362) + LIQUID#2 (x(Sn) 0.31208) + LIQUID (x(Sn) 0.81182) |
| FeSn-10Hua.tdb | 1174.19 | BCC_A2 (x(Sn) 0.08198) + FE5SN3_B82 (x(Sn) 0.375) + LIQUID (x(Sn) 0.92979) |
| FeSn-10Hua.tdb | 1174.19 | BCC_A2 (x(Sn) 0.08199) + FE5SN3_B82 (x(Sn) 0.375) + LIQUID (x(Sn) 0.92975) |
| FeSn-10Hua.tdb | 1074.99 | FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) + LIQUID (x(Sn) 0.96749) |
| FeSn-10Hua.tdb | 1074.99 | FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) + LIQUID (x(Sn) 0.96739) |
| FeSn-10Hua.tdb | 1074.99 | FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) + LIQUID (x(Sn) 0.96744) |
| FeSn-10Hua.tdb | 1046.55 | BCC_A2 (x(Sn) 0.05135) + FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) |
| FeSn-10Hua.tdb | 1046.55 | BCC_A2 (x(Sn) 0.05127) + FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) |
| FeSn-10Hua.tdb | 1046.55 | BCC_A2 (x(Sn) 0.05132) + FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) |
| FeSn-10Hua.tdb | 1024.82 | FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) + LIQUID (x(Sn) 0.98065) |
| FeSn-10Hua.tdb | 1024.82 | FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) + LIQUID (x(Sn) 0.9806) |
| FeSn-10Hua.tdb | 1024.82 | FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) + LIQUID (x(Sn) 0.98069) |
| FeSn-10Hua.tdb | 875.05 | BCC_A2 (x(Sn) 0.01777) + FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) |
| FeSn-10Hua.tdb | 875.05 | BCC_A2 (x(Sn) 0.01777) + FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) |
| FeSn-10Hua.tdb | 875.05 | BCC_A2 (x(Sn) 0.01772) + FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) |
| FeSn-10Hua.tdb | 875.05 | BCC_A2 (x(Sn) 0.01771) + FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) |
| FeSn-10Hua.tdb | 775.52 | FESN_B35 (x(Sn) 0.5) + FESN2_C16 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.99987) |
| FeSn-10Hua.tdb | 775.52 | FESN_B35 (x(Sn) 0.5) + FESN2_C16 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.99987) |
| FeSn-10Hua.tdb | 505.08 | FESN2_C16 (x(Sn) 0.66667) + BCT_A5 (x(Sn) 1) + LIQUID (x(Sn) 1) |
| FeSn-20Laf.tdb | 1416.44 | BCC_A2 (x(Sn) 0.08794) + LIQUID#2 (x(Sn) 0.33415) + LIQUID (x(Sn) 0.80762) |
| FeSn-20Laf.tdb | 1181.15 | BCC_A2 (x(Sn) 0.07996) + FE5SN3_B82 (x(Sn) 0.375) + LIQUID (x(Sn) 0.92619) |
| FeSn-20Laf.tdb | 1181.15 | BCC_A2 (x(Sn) 0.07997) + FE5SN3_B82 (x(Sn) 0.375) + LIQUID (x(Sn) 0.9261) |
| FeSn-20Laf.tdb | 1075.41 | FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) + LIQUID (x(Sn) 0.96114) |
| FeSn-20Laf.tdb | 1075.41 | FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) + LIQUID (x(Sn) 0.96104) |
| FeSn-20Laf.tdb | 1075.41 | FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) + LIQUID (x(Sn) 0.96106) |
| FeSn-20Laf.tdb | 1042.51 | FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) + LIQUID (x(Sn) 0.96933) |
| FeSn-20Laf.tdb | 1042.51 | FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) + LIQUID (x(Sn) 0.96925) |
| FeSn-20Laf.tdb | 1042.51 | FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) + LIQUID (x(Sn) 0.96934) |
| FeSn-20Laf.tdb | 1040.58 | BCC_A2 (x(Sn) 0.05233) + FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) |
| FeSn-20Laf.tdb | 1040.58 | BCC_A2 (x(Sn) 0.05227) + FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) |
| FeSn-20Laf.tdb | 1040.58 | BCC_A2 (x(Sn) 0.0523) + FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) |
| FeSn-20Laf.tdb | 880.44 | BCC_A2 (x(Sn) 0.02445) + FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) |
| FeSn-20Laf.tdb | 880.44 | BCC_A2 (x(Sn) 0.02446) + FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) |
| FeSn-20Laf.tdb | 880.44 | BCC_A2 (x(Sn) 0.02444) + FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) |
| FeSn-20Laf.tdb | 880.44 | BCC_A2 (x(Sn) 0.02442) + FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) |
| FeSn-20Laf.tdb | 786.12 | FESN_B35 (x(Sn) 0.5) + FESN2_C16 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.99845) |
| FeSn-20Laf.tdb | 786.12 | FESN_B35 (x(Sn) 0.5) + FESN2_C16 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.99845) |
| FeSn-20Laf.tdb | 786.12 | FESN_B35 (x(Sn) 0.5) + FESN2_C16 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.99846) |
| FeSn-20Laf.tdb | 505.08 | FESN2_C16 (x(Sn) 0.66667) + BCT_A5 (x(Sn) 1) + LIQUID (x(Sn) 1) |
| FeSn-96Har-LB.tdb | 1407.18 | BCC_A2 (x(Sn) 0.08634) + LIQUID#2 (x(Sn) 0.30897) + LIQUID (x(Sn) 0.77614) |
| FeSn-96Har-LB.tdb | 1167.82 | BCC_A2 (x(Sn) 0.0822) + FE5SN3_B82 (x(Sn) 0.375) + LIQUID (x(Sn) 0.93918) |
| FeSn-96Har-LB.tdb | 1167.82 | BCC_A2 (x(Sn) 0.08221) + FE5SN3_B82 (x(Sn) 0.375) + LIQUID (x(Sn) 0.93912) |
| FeSn-96Har-LB.tdb | 1080.32 | FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) + LIQUID (x(Sn) 0.97041) |
| FeSn-96Har-LB.tdb | 1080.32 | FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) + LIQUID (x(Sn) 0.97027) |
| FeSn-96Har-LB.tdb | 1080.32 | FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) + LIQUID (x(Sn) 0.97035) |
| FeSn-96Har-LB.tdb | 1041.48 | BCC_A2 (x(Sn) 0.0522) + FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) |
| FeSn-96Har-LB.tdb | 1041.48 | BCC_A2 (x(Sn) 0.05211) + FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) |
| FeSn-96Har-LB.tdb | 1041.48 | BCC_A2 (x(Sn) 0.05217) + FE5SN3_B82 (x(Sn) 0.375) + FE3SN2 (x(Sn) 0.4) |
| FeSn-96Har-LB.tdb | 1034.4 | FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) + LIQUID (x(Sn) 0.98074) |
| FeSn-96Har-LB.tdb | 1034.4 | FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) + LIQUID (x(Sn) 0.9807) |
| FeSn-96Har-LB.tdb | 1034.4 | FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) + LIQUID (x(Sn) 0.9808) |
| FeSn-96Har-LB.tdb | 879.98 | BCC_A2 (x(Sn) 0.02157) + FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) |
| FeSn-96Har-LB.tdb | 879.98 | BCC_A2 (x(Sn) 0.02158) + FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) |
| FeSn-96Har-LB.tdb | 879.98 | BCC_A2 (x(Sn) 0.02155) + FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) |
| FeSn-96Har-LB.tdb | 879.98 | BCC_A2 (x(Sn) 0.02153) + FE3SN2 (x(Sn) 0.4) + FESN_B35 (x(Sn) 0.5) |
| FeSn-96Har-LB.tdb | 785.57 | FESN_B35 (x(Sn) 0.5) + FESN2_C16 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.99953) |
| FeSn-96Har-LB.tdb | 785.57 | FESN_B35 (x(Sn) 0.5) + FESN2_C16 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.99953) |
| FeSn-96Har-LB.tdb | 785.57 | FESN_B35 (x(Sn) 0.5) + FESN2_C16 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.99954) |
| FeSn-96Har-LB.tdb | 505.08 | FESN2_C16 (x(Sn) 0.66667) + BCT_A5 (x(Sn) 1) + LIQUID (x(Sn) 1) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/FE/FE-SN.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/FE/FE-SN.json) · [CALPHAD hull FeSn-10Hua](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-SN--FeSn-10Hua.json) · [CALPHAD hull FeSn-96Har-LB](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-SN--FeSn-96Har-LB.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Fe–Sn system (45)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1413.15 | Liquid#1 = BCC_A2 + Liquid#2 |  | experimental | [1] Huang 2010; _cites Isaac 1907_ | Table 1, p. 3, row 7; `ORC-2YIXDDVVWX` |  |
| 1407.15 | Liquid#1 = BCC_A2 + Liquid#2 |  | experimental | [1] Huang 2010; _cites Hari 1996_ [doi](https://doi.org/10.1016/s0364-5916%2896%2900021-1) | Table 1, p. 3, row 6; `ORC-BEVGH6MRLP` |  |
| 1403.15 | Liquid#1 = BCC_A2 + Liquid#2 |  | experimental | [1] Huang 2010; _cites Okamoto 1991_ | Table 1, p. 3, row 5; `ORC-PLNQRXD2EA` |  |
| 1403.15 | Liquid#1 = BCC_A2 + Liquid#2 |  | experimental | [1] Huang 2010; _cites Kubaschewski 1982_ | Table 1, p. 3, row 4; `ORC-RAXPA57WLC` |  |
| 1401.15 | Liquid#1 = BCC_A2 + Liquid#2 |  | experimental | [1] Huang 2010; _cites Mills 1964_ | Table 1, p. 3, row 3; `ORC-NOFXBYXYW7` |  |
| 1396.05 | Liquid#1 = BCC_A2 + Liquid#2 | Liquid#1: Sn 0.312; BCC_A2: Sn 0.083; Liquid#2: Sn 0.811 | model | [1] Huang 2010 | Table 1, p. 3, row 1; `ORC-SUHCECF5IG` |  |
| 1381.15 | Liquid#1 = BCC_A2 + Liquid#2 |  | experimental | [1] Huang 2010; _cites Edwards 1931_ | Table 1, p. 3, row 2; `ORC-NSR7LS6EMF` |  |
| 1183.15 | BCC_A2 + Liquid = Fe5Sn3 | Fe5Sn3: Sn 0.375 | experimental | [1] Huang 2010; _cites Treheux 1974_ | Table 1, p. 3, row 11; `ORC-4GTLOLVA76` |  |
| 1183.15 | BCC_A2 + Liquid = Fe5Sn3 | Fe5Sn3: Sn 0.375 | experimental | [1] Huang 2010; _cites Fedorenko 1977_ | Table 1, p. 3, row 12; `ORC-OOZ6Q2DFCZ` |  |
| 1174.25 | BCC_A2 + Liquid = Fe5Sn3 | BCC_A2: Sn 0.081; Liquid: Sn 0.929; Fe5Sn3: Sn 0.375 | model | [1] Huang 2010 | Table 1, p. 3, row 8; `ORC-O2DSLPAWAR` |  |
| 1168.15 | BCC_A2 + Liquid = Fe5Sn3 | Fe5Sn3: Sn 0.375 | experimental | [1] Huang 2010; _cites Hari 1996_ [doi](https://doi.org/10.1016/s0364-5916%2896%2900021-1) | Table 1, p. 3, row 10; `ORC-O54DP23IJR` |  |
| 1166.15 | BCC_A2 + Liquid = Fe5Sn3 | Fe5Sn3: Sn 0.375 | experimental | [1] Huang 2010; _cites Isaac 1907_ | Table 1, p. 3, row 9; `ORC-P26YSMXX7H` |  |
| 1080.15 | Fe5Sn3 + Liquid = Fe3Sn2 | Fe5Sn3: Sn 0.375; Fe3Sn2: Sn 0.4 | experimental | [1] Huang 2010; _cites Hari 1996_ [doi](https://doi.org/10.1016/s0364-5916%2896%2900021-1) | Table 1, p. 3, row 17; `ORC-D2P5EU5SIK` |  |
| 1079.15 | Fe5Sn3 + Liquid = Fe3Sn2 | Fe5Sn3: Sn 0.375; Fe3Sn2: Sn 0.4 | experimental | [1] Huang 2010; _cites Treheux 1974_ | Table 1, p. 3, row 15; `ORC-LMRCRHGGOB` |  |
| 1079.15 | Fe5Sn3 + Liquid = Fe3Sn2 | Fe5Sn3: Sn 0.375; Fe3Sn2: Sn 0.4 | experimental | [1] Huang 2010; _cites Fedorenko 1977_ | Table 1, p. 3, row 16; `ORC-PMP6D3YGAY` |  |
| 1074.95 | Fe5Sn3 + Liquid = Fe3Sn2 | Fe5Sn3: Sn 0.375; Liquid: Sn 0.967; Fe3Sn2: Sn 0.4 | model | [1] Huang 2010 | Table 1, p. 3, row 13; `ORC-TNI6T2KXNV` |  |
| 1072.15 | Fe5Sn3 + Liquid = Fe3Sn2 | Fe5Sn3: Sn 0.375; Fe3Sn2: Sn 0.4 | experimental | [1] Huang 2010; _cites Singh 1986_ [doi](https://doi.org/10.1007/bf01730231) | Table 1, p. 3, row 14; `ORC-RONCBEMJQZ` |  |
| 1055.15 | Fe5Sn3 = BCC_A2 + Fe3Sn2 | Fe5Sn3: Sn 0.375; Fe3Sn2: Sn 0.4 | experimental | [1] Huang 2010; _cites Treheux 1974_ | Table 1, p. 3, row 21; `ORC-GQDZ6UGI5H` |  |
| 1046.55 | Fe5Sn3 = BCC_A2 + Fe3Sn2 | Fe5Sn3: Sn 0.375; BCC_A2: Sn 0.051; Fe3Sn2: Sn 0.4 | model | [1] Huang 2010 | Table 1, p. 3, row 18; `ORC-DCBSKGCE33` |  |
| 1043.15 | Fe3Sn2 + Liquid = FeSn | Fe3Sn2: Sn 0.4; FeSn: Sn 0.5 | experimental | [1] Huang 2010; _cites Fedorenko 1977_ | Table 1, p. 3, row 26; `ORC-4CDIOO4FKX` |  |
| 1043.15 | Fe3Sn2 + Liquid = FeSn | Fe3Sn2: Sn 0.4; FeSn: Sn 0.5 | experimental | [1] Huang 2010; _cites Treheux 1974_ | Table 1, p. 3, row 25; `ORC-XTHJQ5TZN6` |  |
| 1041.15 | Fe5Sn3 = BCC_A2 + Fe3Sn2 | Fe5Sn3: Sn 0.375; Fe3Sn2: Sn 0.4 | experimental | [1] Huang 2010; _cites Hari 1996_ [doi](https://doi.org/10.1016/s0364-5916%2896%2900021-1) | Table 1, p. 3, row 20; `ORC-YX4ZWSMQ3E` |  |
| 1038.15 | Fe5Sn3 = BCC_A2 + Fe3Sn2 | Fe5Sn3: Sn 0.375; Fe3Sn2: Sn 0.4 | experimental | [1] Huang 2010; _cites Fedorenko 1977_ | Table 1, p. 3, row 19; `ORC-7CW5XVRYSI` |  |
| 1034.15 | Fe3Sn2 + Liquid = FeSn | Fe3Sn2: Sn 0.4; FeSn: Sn 0.5 | experimental | [1] Huang 2010; _cites Hari 1996_ [doi](https://doi.org/10.1016/s0364-5916%2896%2900021-1) | Table 1, p. 3, row 24; `ORC-SUMFDKSHCM` |  |
| 1024.85 | Fe3Sn2 + Liquid = FeSn | Fe3Sn2: Sn 0.4; Liquid: Sn 0.98; FeSn: Sn 0.5 | model | [1] Huang 2010 | Table 1, p. 3, row 22; `ORC-WQSBWXD67O` |  |
| 1013.15 | Fe3Sn2 + Liquid = FeSn | Fe3Sn2: Sn 0.4; FeSn: Sn 0.5 | experimental | [1] Huang 2010; _cites Kubaschewski 1982_ | Table 1, p. 3, row 23; `ORC-NHK6K7M2YH` |  |
| 880.15 | Fe3Sn2 = BCC_A2 + FeSn | Fe3Sn2: Sn 0.4; FeSn: Sn 0.5 | experimental | [1] Huang 2010; _cites Fedorenko 1977_ | Table 1, p. 3, row 31; `ORC-4NUHZVSBKN` |  |
| 880.15 | Fe3Sn2 = BCC_A2 + FeSn | Fe3Sn2: Sn 0.4; FeSn: Sn 0.5 | experimental | [1] Huang 2010; _cites Hari 1996_ [doi](https://doi.org/10.1016/s0364-5916%2896%2900021-1) | Table 1, p. 3, row 32; `ORC-RFPXNRM5KW` |  |
| 880.15 | Fe3Sn2 = BCC_A2 + FeSn | Fe3Sn2: Sn 0.4; FeSn: Sn 0.5 | experimental | [1] Huang 2010; _cites Treheux 1974_ | Table 1, p. 3, row 30; `ORC-VWBQDEGXSV` |  |
| 875.05 | Fe3Sn2 = BCC_A2 + FeSn | Fe3Sn2: Sn 0.4; BCC_A2: Sn 0.017; FeSn: Sn 0.5 | model | [1] Huang 2010 | Table 1, p. 3, row 27; `ORC-JL2OCAHTKZ` |  |
| 873.15 | Fe3Sn2 = BCC_A2 + FeSn | Fe3Sn2: Sn 0.4; FeSn: Sn 0.5 | experimental | [1] Huang 2010; _cites Kubaschewski 1982_ | Table 1, p. 3, row 29; `ORC-VGVJKKFYS2` |  |
| 870.15 | Fe3Sn2 = BCC_A2 + FeSn | Fe3Sn2: Sn 0.4; FeSn: Sn 0.5 | experimental | [1] Huang 2010; _cites Singh 1986_ [doi](https://doi.org/10.1007/bf01730231) | Table 1, p. 3, row 28; `ORC-3JSDZ5LBIB` |  |
| 786.15 | FeSn + Liquid = FeSn2 | FeSn: Sn 0.5; FeSn2: Sn 0.666667 | experimental | [1] Huang 2010; _cites Fedorenko 1977_ | Table 1, p. 3, row 38; `ORC-ALCYRH2ZFP` |  |
| 786.15 | FeSn + Liquid = FeSn2 | FeSn: Sn 0.5; FeSn2: Sn 0.666667 | experimental | [1] Huang 2010; _cites Treheux 1974_ | Table 1, p. 3, row 37; `ORC-IO63HJ52E5` |  |
| 786.15 | FeSn + Liquid = FeSn2 | FeSn: Sn 0.5; FeSn2: Sn 0.666667 | experimental | [1] Huang 2010; _cites Hari 1996_ [doi](https://doi.org/10.1016/s0364-5916%2896%2900021-1) | Table 1, p. 3, row 39; `ORC-RHSQO5B2DL` |  |
| 775.55 | FeSn + Liquid = FeSn2 | FeSn: Sn 0.5; Liquid: Sn 0.999; FeSn2: Sn 0.666 | model | [1] Huang 2010 | Table 1, p. 3, row 33; `ORC-6LIM7XZPZF` |  |
| 769.15 | FeSn + Liquid = FeSn2 | FeSn: Sn 0.5; FeSn2: Sn 0.666667 | experimental | [1] Huang 2010; _cites Kubaschewski 1982_ | Table 1, p. 3, row 36; `ORC-CHGXEZTZEX` |  |
| 769.15 | FeSn + Liquid = FeSn2 | FeSn: Sn 0.5; FeSn2: Sn 0.666667 | experimental | [1] Huang 2010; _cites Isaac 1907_ | Table 1, p. 3, row 34; `ORC-FUNK6KUKBT` |  |
| 769.15 | FeSn + Liquid = FeSn2 | FeSn: Sn 0.5; FeSn2: Sn 0.666667 | experimental | [1] Huang 2010; _cites Edwards 1931_ | Table 1, p. 3, row 35; `ORC-GPG7MSSQW5` |  |
| 505.15 | Liquid = FeSn2 + BCT_A5 | FeSn2: Sn 0.666667; BCT_A5: Sn 1 | experimental | [1] Huang 2010; _cites Treheux 1974_ | Table 1, p. 3, row 42; `ORC-O5NN6EYMCY` |  |
| 505.15 | Liquid = FeSn2 + BCT_A5 | FeSn2: Sn 0.666667; BCT_A5: Sn 1 | experimental | [1] Huang 2010; _cites Connolly 1975_ [doi](https://doi.org/10.1016/0001-6160%2875%2990039-5) | Table 1, p. 3, row 43; `ORC-PA3B47JTS3` |  |
| 505.15 | Liquid = FeSn2 + BCT_A5 | FeSn2: Sn 0.666667; BCT_A5: Sn 1 | experimental | [1] Huang 2010; _cites Hari 1996_ [doi](https://doi.org/10.1016/s0364-5916%2896%2900021-1) | Table 1, p. 3, row 45; `ORC-SWOKAS3ZBE` |  |
| 505.15 | Liquid = FeSn2 + BCT_A5 | FeSn2: Sn 0.666667; BCT_A5: Sn 1 | experimental | [1] Huang 2010; _cites Fedorenko 1977_ | Table 1, p. 3, row 44; `ORC-XVQ6DBCVTC` |  |
| 505.05 | Liquid = FeSn2 + BCT_A5 | Liquid: Sn 0.999; FeSn2: Sn 0.666; BCT_A5: Sn 1 | model | [1] Huang 2010 | Table 1, p. 3, row 40; `ORC-FBDS52CZUP` |  |
| 501.15 | Liquid = FeSn2 + BCT_A5 | FeSn2: Sn 0.666667; BCT_A5: Sn 1 | experimental | [1] Huang 2010; _cites Isaac 1907_ | Table 1, p. 3, row 41; `ORC-FNSYAP5B3P` |  |

## 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–Sn system (2)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Fe5Sn3 | [Fe5Sn3](https://data.orchid-project.org/compounds/Fe5Sn3.html) | 2.79 kJ/mol-atom |  | model |  | 18.263 (oqmd-1277778) | [2] Lafaye 2020 | Table 2, p. 4, row 8; `ORC-PWHXDJDPFF` |  |
| Fe5Sn3 |  | 2.79 kJ/mol-atom | 0 | DFT |  |  | [2] Lafaye 2020 | Table 2, p. 4, row 7; `ORC-XBP6ZIX4UV` |  |

## Other properties

### Activity / EMF / Gibbs energy (12)

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

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Gibbs energy; _printed: Gibbs energy (const)_ | -27790 J/ mole of atoms |  | FeSn; _alloy: Sn 0.5_ | experimental | [3] Kumar 1996; _cites ref. 78Ere_ | Table 4, p. 7, row 3; `ORC-KMP2SZ5CUU.28d04e` |  |
| Gibbs energy; _printed: Gibbs energy (T)_ | 23.65 J/ mole of atoms |  | FeSn; _alloy: Sn 0.5_ | experimental | [3] Kumar 1996; _cites ref. 78Ere_ | Table 4, p. 7, row 3; `ORC-KMP2SZ5CUU.9a525b` |  |
| Gibbs energy; _printed: Gibbs energy (T)_ | 20.334 J/ mole of atoms |  | FeSn; _alloy: Sn 0.5_ | experimental | [3] Kumar 1996; _cites Zabyr 1984_ | Table 4, p. 7, row 2; `ORC-L2XQNXFHWI.9e8422` |  |
| Gibbs energy; _printed: Gibbs energy (const)_ | -21142 J/ mole of atoms |  | FeSn; _alloy: Sn 0.5_ | experimental | [3] Kumar 1996; _cites Zabyr 1984_ | Table 4, p. 7, row 2; `ORC-L2XQNXFHWI.bb3fe9` |  |
| Gibbs energy; _printed: Gibbs energy (const)_ | -23013 J/ mole of atoms |  | FeSn; _alloy: Sn 0.5_ | model | [3] Kumar 1996 | Table 4, p. 7, row 1; `ORC-STIDF6SN6I.0cefc6` |  |
| Gibbs energy; _printed: Gibbs energy (T)_ | 19.702 J/ mole of atoms |  | FeSn; _alloy: Sn 0.5_ | model | [3] Kumar 1996 | Table 4, p. 7, row 1; `ORC-STIDF6SN6I.30549f` |  |
| Gibbs energy; _printed: Gibbs energy (const)_ | -27624 J/ mole of atoms |  | FeSn2; _alloy: Sn 0.666667_ | model | [3] Kumar 1996 | Table 4, p. 7, row 4; `ORC-AVQJPIZEIW.035cf5` |  |
| Gibbs energy; _printed: Gibbs energy (T)_ | 28.803 J/ mole of atoms |  | FeSn2; _alloy: Sn 0.666667_ | model | [3] Kumar 1996 | Table 4, p. 7, row 4; `ORC-AVQJPIZEIW.e9f8d1` |  |
| Gibbs energy; _printed: Gibbs energy (T)_ | 30.52 J/ mole of atoms |  | FeSn2; _alloy: Sn 0.666667_ | experimental | [3] Kumar 1996; _cites ref. 78Ere_ | Table 4, p. 7, row 6; `ORC-GUBXGHAJKS.0d7d39` |  |
| Gibbs energy; _printed: Gibbs energy (const)_ | -24140 J/ mole of atoms |  | FeSn2; _alloy: Sn 0.666667_ | experimental | [3] Kumar 1996; _cites ref. 78Ere_ | Table 4, p. 7, row 6; `ORC-GUBXGHAJKS.889d22` |  |
| Gibbs energy; _printed: Gibbs energy (T)_ | 28.368 J/ mole of atoms |  | FeSn2; _alloy: Sn 0.666667_ | experimental | [3] Kumar 1996; _cites Zabyr 1984_ | Table 4, p. 7, row 5; `ORC-RGO66BRZOJ.a4637d` |  |
| Gibbs energy; _printed: Gibbs energy (const)_ | -27916 J/ mole of atoms |  | FeSn2; _alloy: Sn 0.666667_ | experimental | [3] Kumar 1996; _cites Zabyr 1984_ | Table 4, p. 7, row 5; `ORC-RGO66BRZOJ.fdac72` |  |

## Sources

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

1. Yu-Chih Huang, Wojciech Gierlotka, Sinn-Wen Chen, Sn–Bi–Fe thermodynamic modeling and Sn–Bi/Fe interfacial reactions, Intermetallics 18, 984-991 (2010). [doi:10.1016/j.intermet.2010.01.026](https://doi.org/10.1016/j.intermet.2010.01.026)
2. Paul Lafaye, Caroline Toffolon-Masclet, Jean-Claude Crivello, Jean-Marc Joubert, Thermodynamic modelling of the Fe–Sn–Zr system based on new experiments and first-principles calculations, Journal of Alloys and Compounds 821, 153200 (2020). [doi:10.1016/j.jallcom.2019.153200](https://doi.org/10.1016/j.jallcom.2019.153200)
3. K.C.Hari Kumar, P. Wollants, L. Delaey, Thermodynamic evaluation of Fe-Sn phase diagram, Calphad 20, 139-149 (1996). [doi:10.1016/s0364-5916(96)00021-1](https://doi.org/10.1016/s0364-5916%2896%2900021-1)

## 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/).