# Fe–Sb system

> Fe–Sb system: 80 accepted literature values (invariant reaction 59, phase transition 14, phase equilibrium 6, formation 1) 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-SB.html · Markdown: https://data.orchid-project.org/systems/FE-SB.md

80 accepted literature values from 3 paper(s) (experimental 54, model 13, unspecified 13); 3 calculated phase diagram(s). 21 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-SB.json) · [CSV](https://data.orchid-project.org/systems/FE-SB.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#FE-SB) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#FE-SB/FeSb-08Boa.json) · [phases (7)](https://data.orchid-project.org/phases/pages/FE-SB.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/FE-SB.html) · [Markdown](https://data.orchid-project.org/systems/FE-SB.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 54 |
| model | 13 |
| unspecified | 13 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 59 |
| phase transition | 14 |
| phase equilibrium | 6 |
| formation | 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.

Table: Assessments with a calculated phase diagram

| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| FeSb-08Boa.tdb | D. Boa, S. Hassam, G. Kra, K.P. Kotchi, J. Rogez, Calphad, 32, 227-39(2008). [doi:10.1016/j.calphad.2008.01.001](https://doi.org/10.1016/j.calphad.2008.01.001) | `67f3cb0310dccf1b94fb6bb81adf5611be79d7d462beeee220b56651c2d98a60` | [viewer](https://orchid-project.org/phase-diagrams/#FE-SB/FeSb-08Boa.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeSb-08Boa.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeSb-08Boa.json) |
| FeSb-14Li.tdb | C. Li, D. Zhu, Y. Zhang, Z. Du, C. Guo, J. Li, J.-C. Tedenac, Calphad, 47, 23-34(2014). [doi:10.1016/j.calphad.2014.05.005](https://doi.org/10.1016/j.calphad.2014.05.005) | `8512f95ce9460d4950e93aeba402869f73b6e10a660930a7633464588d28e8bf` | [viewer](https://orchid-project.org/phase-diagrams/#FE-SB/FeSb-14Li.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeSb-14Li.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeSb-14Li.json) |
| FeSb-95Pei-LB.tdb | B. Pei, B. Bjorkman, B. Sundman, B. Jansson, Calphad, 19, 1-15(1995). [doi:10.1016/0364-5916(95)00001-U](https://doi.org/10.1016/0364-5916%2895%2900001-U) | `75ce69413b04b2fe92b8edc70c4cd62aa6f4b53b9036544b715d95bfd0721460` | [viewer](https://orchid-project.org/phase-diagrams/#FE-SB/FeSb-95Pei-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeSb-95Pei-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeSb-95Pei-LB.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| FeSb-08Boa.tdb | 1280.37 | BCC_A2 (x(Sb) 0.0532) + LIQUID (x(Sb) 0.33236) + FESB_B81 (x(Sb) 0.4032) |
| FeSb-08Boa.tdb | 1020.29 | FESB_B81 (x(Sb) 0.48286) + FESB2_C18 (x(Sb) 0.66667) + LIQUID (x(Sb) 0.89819) |
| FeSb-08Boa.tdb | 897.68 | FESB2_C18 (x(Sb) 0.66667) + LIQUID (x(Sb) 0.98125) + RHOMBOHEDRAL_A7 (x(Sb) 1) |
| FeSb-08Boa.tdb | 897.68 | FESB2_C18 (x(Sb) 0.66667) + LIQUID (x(Sb) 0.98151) + RHOMBOHEDRAL_A7 (x(Sb) 1) |
| FeSb-14Li.tdb | 1283.38 | BCC_A2 (x(Sb) 0.05903) + LIQUID (x(Sb) 0.32968) + FESB_B81 (x(Sb) 0.42164) |
| FeSb-14Li.tdb | 1021.34 | FESB_B81 (x(Sb) 0.49486) + FESB2_C18 (x(Sb) 0.66667) + LIQUID (x(Sb) 0.88054) |
| FeSb-14Li.tdb | 900.29 | FESB2_C18 (x(Sb) 0.66667) + LIQUID (x(Sb) 0.98904) + RHOMBOHEDRAL_A7 (x(Sb) 1) |
| FeSb-14Li.tdb | 900.29 | FESB2_C18 (x(Sb) 0.66667) + LIQUID (x(Sb) 0.98913) + RHOMBOHEDRAL_A7 (x(Sb) 1) |
| FeSb-95Pei-LB.tdb | 1271.52 | BCC_A2 (x(Sb) 0.05257) + LIQUID (x(Sb) 0.32514) + FESB_B81 (x(Sb) 0.40714) |
| FeSb-95Pei-LB.tdb | 1018.89 | FESB_B81 (x(Sb) 0.48452) + FESB2_C18 (x(Sb) 0.66667) + LIQUID (x(Sb) 0.89517) |
| FeSb-95Pei-LB.tdb | 897.75 | FESB2_C18 (x(Sb) 0.66667) + LIQUID (x(Sb) 0.98097) + RHOMBOHEDRAL_A7 (x(Sb) 1) |
| FeSb-95Pei-LB.tdb | 897.75 | FESB2_C18 (x(Sb) 0.66667) + LIQUID (x(Sb) 0.98123) + RHOMBOHEDRAL_A7 (x(Sb) 1) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/FE/FE-SB.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/FE/FE-SB.json) · [CALPHAD hull FeSb-08Boa](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-SB--FeSb-08Boa.json) · [CALPHAD hull FeSb-95Pei-LB](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-SB--FeSb-95Pei-LB.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Fe–Sb system (59)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1423 | polymorphic: γ(Fe) -> α(Fe) | γ(Fe): Sb 0.0116; α(Fe): Sb 0.0168 | model | [1] Li 2014 | Table 2, p. 3, row 6; `ORC-7ZTWXWL5ZV` |  |
| 1423 | polymorphic: γ(Fe) -> α(Fe) | γ(Fe): Sb 0.007; α(Fe): Sb 0.014 | experimental | [1] Li 2014; _cites Nageswararso 1974_ | Table 2, p. 3, row 2; `ORC-CXF32RFAMY` |  |
| 1423 | polymorphic: γ(Fe) -> α(Fe) | α(Fe): Sb 0.021 | experimental | [1] Li 2014; _cites Jones 1934_ | Table 2, p. 3, row 1; `ORC-GON2AZ4NXR` |  |
| 1423 | polymorphic: γ(Fe) -> α(Fe) | γ(Fe): Sb 0.0093; α(Fe): Sb 0.0022 | experimental | [1] Li 2014; _cites Svechnikov 1938_ | Table 2, p. 3, row 3; `ORC-HO346JYJMU` |  |
| 1423 | polymorphic: γ(Fe) -> α(Fe) | γ(Fe): Sb 0.011; α(Fe): Sb 0.0168 | unspecified | [1] Li 2014; _cites Kubaschewski 1982_ | Table 2, p. 3, row 5; `ORC-RS6OZYGS6C` |  |
| 1423 | polymorphic: γ(Fe) -> α(Fe) | γ(Fe): Sb 0.0096; α(Fe): Sb 0.017 | experimental | [1] Li 2014; _cites Hillert 1967_ | Table 2, p. 3, row 4; `ORC-WTRLHT4ZOY` |  |
| 1303.39 | congruent melting: Liq -> β(FeSb) | L: Sb 0.4289; β(FeSb): Sb 0.4289 | model | [1] Li 2014 | Table 2, p. 3, row 22; `ORC-RVE4YAAM7Q` |  |
| 1298 | congruent melting: Liq -> β(FeSb) | L: Sb 0.43; β(FeSb): Sb 0.43 | experimental | [1] Li 2014; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 2, p. 3, row 20; `ORC-2K6VG5LMUI` |  |
| 1298 | congruent melting: Liq -> β(FeSb) | L: Fe 0.5, Sb 0.5; β(FeSb): Fe 0.5, Sb 0.5 | experimental | [1] Li 2014; _cites Hagg 1929_ | Table 2, p. 3, row 21; `ORC-5ZRSP3P4Z7` |  |
| 1293 | congruent melting: Liq -> β(FeSb) | L: Sb 0.44; β(FeSb): Sb 0.44 | experimental | [1] Li 2014; _cites Vogel 1935_ | Table 2, p. 3, row 16; `ORC-KFGY7CIUQC` |  |
| 1292 | congruent melting: Liq -> β(FeSb) | L: Sb 0.42; β(FeSb): Sb 0.42 | experimental | [1] Li 2014; _cites Maier 1972_ | Table 2, p. 3, row 17; `ORC-3ICO62DQJ5` |  |
| 1292 | congruent melting: Liq -> β(FeSb) | L: Sb 0.42; β(FeSb): Sb 0.42 | unspecified | [1] Li 2014; _cites Kubaschewski 1982_ | Table 2, p. 3, row 18; `ORC-J4A6JGOESY` |  |
| 1287 | congruent melting: Liq -> β(FeSb) | L: Sb 0.394; β(FeSb): Sb 0.394 | experimental | [1] Li 2014; _cites Kurnakow 1908_ [doi](https://doi.org/10.1002/zaac.19080580102) | Table 2, p. 3, row 15; `ORC-XOYD5OBXGR` |  |
| 1283 | congruent melting: Liq -> β(FeSb) | L: Sb 0.44; β(FeSb): Sb 0.44 | experimental | [1] Li 2014; _cites Feschotte 1989_ [doi](https://doi.org/10.1016/0022-5088%2889%2990235-x) | Table 2, p. 3, row 19; `ORC-CYBNEAWTVW` |  |
| 1282.15 | eutectic: Liq = αFe + ε-FeSb | Liq: Sb 0.33; αFe: Sb 0.09; ε-FeSb: Sb 0.4 | experimental | [2] Boa 2008; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 10, p. 9, row 5; `ORC-P65FAE6JUX` |  |
| 1282 | eutectic: Liq -> α(Fe) + β(FeSb) | L: Sb 0.33; β(FeSb): Sb 0.44 | experimental | [1] Li 2014; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 2, p. 3, row 12; `ORC-JJWMOX52EN` |  |
| 1280.15 | eutectic: Liq -> α(Fe) + β(FeSb) |  | experimental | [1] Li 2014; _cites Hagg 1929_ | Table 2, p. 3, row 13; `ORC-QQUAUUKXBN` |  |
| 1280.15 | eutectic: Liq = αFe + ε-FeSb | ε-FeSb: Sb 0.5 | experimental | [2] Boa 2008 | Table 10, p. 9, row 4; `ORC-XFV4543OI7` |  |
| 1280.03 | eutectic: Liq -> α(Fe) + β(FeSb) | L: Sb 0.3313; α(Fe): Sb 0.0594; β(FeSb): Sb 0.4212 | model | [1] Li 2014 | Table 2, p. 3, row 14; `ORC-46JIQVYBBJ` |  |
| 1280 | eutectic: Liq = αFe + ε-FeSb | Liq: Sb 0.3323; αFe: Sb 0.0532; ε-FeSb: Sb 0.4032 | model | [2] Boa 2008 | Table 10, p. 9, row 3; `ORC-SF6ITPW4TZ` |  |
| 1276 | eutectic: Liq -> α(Fe) + β(FeSb) | L: Sb 0.34; α(Fe): Sb 0.09; β(FeSb): Sb 0.41 | experimental | [1] Li 2014; _cites Feschotte 1989_ [doi](https://doi.org/10.1016/0022-5088%2889%2990235-x) | Table 2, p. 3, row 11; `ORC-VTOJWOK3FQ` |  |
| 1275 | eutectic: Liq -> α(Fe) + β(FeSb) | L: Sb 0.323; α(Fe): Sb 0.024; β(FeSb): Sb 0.354 | experimental | [1] Li 2014; _cites Kurnakow 1908_ [doi](https://doi.org/10.1002/zaac.19080580102) | Table 2, p. 3, row 7; `ORC-BXFK7Z52NT` |  |
| 1271 | eutectic: L = α-Fe + ε-FeSb | L: Sb 0.3252; α-Fe: Sb 0.0526; ε-FeSb: Sb 0.4072 | model | [3] Pei 1995 | Table 3, p. 8, row 4; `ORC-5VLT3Y2CNT` |  |
| 1269 | eutectic: L = α-Fe + ε-FeSb | L: Sb 0.346; α-Fe: Sb 0.05; ε-FeSb: Sb 0.4 | unspecified | [3] Pei 1995; _cites Massalski_ | Table 3, p. 8, row 6; `ORC-22VFRRHORH` |  |
| 1269 | eutectic: Liq -> α(Fe) + β(FeSb) | L: Sb 0.346; α(Fe): Sb 0.05; β(FeSb): Sb 0.39 | unspecified | [1] Li 2014; _cites Kubaschewski 1982_ | Table 2, p. 3, row 10; `ORC-3HFBAKE3UA` |  |
| 1269 | eutectic: L = α-Fe + ε-FeSb | L: Sb 0.346; α-Fe: Sb 0.05; ε-FeSb: Sb 0.39 | unspecified | [3] Pei 1995; _cites ref. 3_ | Table 3, p. 8, row 5; `ORC-NARY7UEKPR` |  |
| 1269 | eutectic: Liq -> α(Fe) + β(FeSb) | L: Sb 0.346; α(Fe): Sb 0.154; β(FeSb): Sb 0.39 | experimental | [1] Li 2014; _cites Maier 1972_ | Table 2, p. 3, row 9; `ORC-X3IKDAWB5Y` |  |
| 1261 | eutectic: Liq -> α(Fe) + β(FeSb) | L: Sb 0.382 | experimental | [1] Li 2014; _cites Geller 1939_ [doi](https://doi.org/10.1002/srin.193900887) | Table 2, p. 3, row 8; `ORC-IZ6CQQVBO6` |  |
| 1023.15 | peritectic: Liq + ε-FeSb = FeSb2 | Liq: Sb 0.9; ε-FeSb: Sb 0.481; FeSb2: Sb 0.6667 | experimental | [2] Boa 2008; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 10, p. 9, row 8; `ORC-EXPWQG7LGD` |  |
| 1023 | peritectic: Liq + β(FeSb) -> ζ2FeSb2 | L: Sb 0.9; β(FeSb): Fe 0.5, Sb 0.5; ζ2FeSb2: Sb 0.667 | experimental | [1] Li 2014; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 2, p. 3, row 29; `ORC-WOQ6ZFQ56S` |  |
| 1022.44 | peritectic: Liq + β(FeSb) -> ζ2FeSb2 | L: Sb 0.8743; β(FeSb): Sb 0.4937; ζ2FeSb2: Sb 0.6667 | model | [1] Li 2014 | Table 2, p. 3, row 31; `ORC-VF3WJIODW6` |  |
| 1022.15 | peritectic: Liq + ε-FeSb = FeSb2 | ε-FeSb: Sb 0.5; FeSb2: Sb 0.6667 | experimental | [2] Boa 2008 | Table 10, p. 9, row 7; `ORC-4YFDSF6YGI` |  |
| 1022.15 | peritectic: Liq + β(FeSb) -> ζ2FeSb2 | β(FeSb): Fe 0.5, Sb 0.5; ζ2FeSb2: Sb 0.667 | experimental | [1] Li 2014; _cites Hagg 1929_ | Table 2, p. 3, row 30; `ORC-F72MRXTNLB` |  |
| 1020 | peritectic: Liq + ε-FeSb = FeSb2 | Liq: Sb 0.8982; ε-FeSb: Sb 0.4829; FeSb2: Sb 0.6667 | model | [2] Boa 2008 | Table 10, p. 9, row 6; `ORC-LPQT5ZJXKU` |  |
| 1019 | peritectic: Liq + β(FeSb) -> ζ2FeSb2 | L: Sb 0.856; β(FeSb): Sb 0.49; ζ2FeSb2: Sb 0.667 | experimental | [1] Li 2014; _cites Feschotte 1989_ [doi](https://doi.org/10.1016/0022-5088%2889%2990235-x) | Table 2, p. 3, row 28; `ORC-H4JIJR3SUO` |  |
| 1019 | peritectic: L + ε-FeSb = FeSb2 | L: Sb 0.8949; ε-FeSb: Sb 0.4845; FeSb2: Sb 0.6667 | model | [3] Pei 1995 | Table 3, p. 8, row 7; `ORC-ZE4F5K77SM` |  |
| 1018 | peritectic |  | experimental | [1] Li 2014; _cites Kjekshus 1977_ [doi](https://doi.org/10.3891/acta.chem.scand.31a-0517) | p. 2; `ORC-UUD5VIHQPY.fd321a` | “Refs. \[31,39,40,45\] identified and confirmed the existence of the intermediate phase ζ2FeSb2 and Refs. \[34,46\] measured its peritectic temperature at 1011 K and 1018 K, respectively.” |
| 1018 | peritectic: Liq + β(FeSb) -> ζ2FeSb2 | β(FeSb): Fe 0.5, Sb 0.5; ζ2FeSb2: Sb 0.667 | experimental | [1] Li 2014; _cites Kjekshus 1977_ [doi](https://doi.org/10.3891/acta.chem.scand.31a-0517) | Table 2, p. 3, row 27; `ORC-WKGF6ZJ3BB` |  |
| 1011 | peritectic: L + ε-FeSb = FeSb2 | L: Sb 0.888; ε-FeSb: Sb 0.47; FeSb2: Sb 0.6667 | unspecified | [3] Pei 1995; _cites Massalski_ | Table 3, p. 8, row 9; `ORC-4DLZEXY7CT` |  |
| 1011 | peritectic: L + ε-FeSb = FeSb2 | L: Sb 0.888; ε-FeSb: Sb 0.465; FeSb2: Sb 0.6667 | unspecified | [3] Pei 1995; _cites ref. 3_ | Table 3, p. 8, row 8; `ORC-5FVFUV6QEW` |  |
| 1011 | peritectic: Liq + β(FeSb) -> ζ2FeSb2 | L: Sb 0.888; β(FeSb): Sb 0.487; ζ2FeSb2: Sb 0.667 | experimental | [1] Li 2014; _cites Maier 1972_ | Table 2, p. 3, row 25; `ORC-6M2FDAG62Y` |  |
| 1011 | peritectic: Liq + β(FeSb) -> ζ2FeSb2 | L: Sb 0.888; β(FeSb): Fe 0.5, Sb 0.5; ζ2FeSb2: Sb 0.667 | unspecified | [1] Li 2014; _cites Kubaschewski 1982_ | Table 2, p. 3, row 26; `ORC-MDVBOIL23L` |  |
| 1011 | peritectic |  | experimental | [1] Li 2014; _cites Maier 1972_ | p. 2; `ORC-UUD5VIHQPY.8f17ce` | “Refs. \[31,39,40,45\] identified and confirmed the existence of the intermediate phase ζ2FeSb2 and Refs. \[34,46\] measured its peritectic temperature at 1011 K and 1018 K, respectively.” |
| 1005 | peritectic: Liq + β(FeSb) -> ζ2FeSb2 | L: Sb 0.861; β(FeSb): Sb 0.394; ζ2FeSb2: Sb 0.667 | experimental | [1] Li 2014; _cites Kurnakow 1908_ [doi](https://doi.org/10.1002/zaac.19080580102) | Table 2, p. 3, row 23; `ORC-N3PXZ4SU7I` |  |
| 1003 | peritectic: Liq + β(FeSb) -> ζ2FeSb2 | L: Sb 0.861; β(FeSb): Fe 0.5, Sb 0.5; ζ2FeSb2: Sb 0.667 | experimental | [1] Li 2014; _cites Geller 1939_ [doi](https://doi.org/10.1002/srin.193900887) | Table 2, p. 3, row 24; `ORC-4RHFBXP7UW` |  |
| 901 | eutectic: L = FeSb2 + α-Sb | L: Sb 0.992; FeSb2: Sb 0.6667; α-Sb: Sb 1 | unspecified | [3] Pei 1995; _cites Massalski_ | Table 3, p. 8, row 12; `ORC-LFADWJEIA4` |  |
| 901 | eutectic: Liq -> ζ2FeSb2 + Sb | L: Sb 0.968; ζ2FeSb2: Sb 0.667; Sb: Sb 1 | experimental | [1] Li 2014; _cites Kurnakow 1908_ [doi](https://doi.org/10.1002/zaac.19080580102) | Table 2, p. 3, row 32; `ORC-XDZTXDM3TH` |  |
| 900.28 | eutectic: Liq -> ζ2FeSb2 + Sb | L: Sb 0.9891; ζ2FeSb2: Sb 0.6667; Sb: Sb 1 | model | [1] Li 2014 | Table 2, p. 3, row 39; `ORC-VT5EQHCSE2` |  |
| 898 | eutectic: Liq = FeSb2 + Sb | Liq: Sb 0.9815; FeSb2: Sb 0.6667; Sb: Sb 1 | model | [2] Boa 2008 | Table 10, p. 9, row 9; `ORC-FTFX42F3UD` |  |
| 898 | eutectic: L = FeSb2 + α-Sb | L: Sb 0.9812; FeSb2: Sb 0.6667; α-Sb: Sb 1 | model | [3] Pei 1995 | Table 3, p. 8, row 10; `ORC-W5GV3XTFOS` |  |
| 897.15 | eutectic: Liq = FeSb2 + Sb | Liq: Sb 0.968; FeSb2: Sb 0.6667; Sb: Sb 1 | experimental | [2] Boa 2008; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 10, p. 9, row 11; `ORC-O4JFM2XJ4K` |  |
| 897.15 | eutectic: Liq = FeSb2 + Sb | FeSb2: Sb 0.6667; Sb: Sb 1 | experimental | [2] Boa 2008 | Table 10, p. 9, row 10; `ORC-SKPTBTQ3TY` |  |
| 897 | eutectic: Liq -> ζ2FeSb2 + Sb | ζ2FeSb2: Sb 0.667 | experimental | [1] Li 2014; _cites Hagg 1929_ | Table 2, p. 3, row 38; `ORC-MSQEZWDMQ5` |  |
| 897 | eutectic: Liq -> ζ2FeSb2 + Sb | ζ2FeSb2: Sb 0.667; Sb: Sb 1 | experimental | [1] Li 2014; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 2, p. 3, row 37; `ORC-VYDXKMDTBA` |  |
| 894 | eutectic: Liq -> ζ2FeSb2 + Sb | L: Sb 0.965; ζ2FeSb2: Sb 0.667; Sb: Sb 1 | experimental | [1] Li 2014; _cites Feschotte 1989_ [doi](https://doi.org/10.1016/0022-5088%2889%2990235-x) | Table 2, p. 3, row 36; `ORC-XXIIIEJFRE` |  |
| 892 | eutectic: Liq -> ζ2FeSb2 + Sb | L: Sb 0.982; ζ2FeSb2: Sb 0.667; Sb: Sb 1 | experimental | [1] Li 2014; _cites Geller 1939_ [doi](https://doi.org/10.1002/srin.193900887) | Table 2, p. 3, row 33; `ORC-KBYK2XT4PT` |  |
| 887 | eutectic: Liq -> ζ2FeSb2 + Sb | L: Sb 0.992; ζ2FeSb2: Sb 0.667; Sb: Sb 1 | unspecified | [1] Li 2014; _cites Kubaschewski 1982_ | Table 2, p. 3, row 35; `ORC-BNUJJDCV47` |  |
| 887 | eutectic: L = FeSb2 + α-Sb | L: Sb 0.992; FeSb2: Sb 0.6667; α-Sb: Sb 1 | unspecified | [3] Pei 1995; _cites ref. 3_ | Table 3, p. 8, row 11; `ORC-HMKBC3JSEI` |  |
| 887 | eutectic: Liq -> ζ2FeSb2 + Sb | L: Sb 0.992; ζ2FeSb2: Sb 0.667; Sb: Sb 1 | experimental | [1] Li 2014; _cites Maier 1972_ | Table 2, p. 3, row 34; `ORC-Q6TC56YLJI` |  |

## 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–Sb system (1)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| FeSb |  | 2.999 unspecified ± 1.385 | 1068 | experimental |  |  | [2] Boa 2008; _cites Predel 1978_ [doi](https://doi.org/10.1016/0040-6031%2878%2985146-6) | p. 4; `ORC-LODKDEI2MA` | “Predel and Vogelbein \[41\] used solution calorimetry at 1068 K and determined the enthalpies of formation of the ε-FeSb phase at 45 at.% Sb and at 43 at.% Sb to be about (2.999 ± 1.385) and -(0.044 ± 1.234) kJ/g atom, respectively.” |

## Other properties

### Phase transition (14)

Table: Phase transition, Fe–Sb system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 897.15 K | 897.15 | eutectic: L = FeSb2 + Sb (e2); _alloy: Fe 0.33, Sb 0.67_ | experimental | [2] Boa 2008 | Table 2, p. 3, row 9; `ORC-MHP3WLMFIE` |  |
| Phase transition | 897.15 K | 897.15 | eutectic: L = FeSb2 + Sb(e2); _alloy: Fe 0.3, Sb 0.7_ | experimental | [2] Boa 2008; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 2, p. 3, row 12; `ORC-JR3RTKRDWE` |  |
| Phase transition | 1022.15 K | 1022.15 | peritectic: L + ε-FeSb = FeSb2(p1); _alloy: Fe 0.33, Sb 0.67_ | experimental | [2] Boa 2008 | Table 2, p. 3, row 10; `ORC-AEA4NWRQJ2` |  |
| Phase transition | 1022.15 K | 1022.15 | peritectic: L + ε-FeSb = FeSb2(p1); _alloy: Fe 0.3, Sb 0.7_ | experimental | [2] Boa 2008; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 2, p. 3, row 13; `ORC-S2KAFG4IQE` |  |
| Phase transition | 1038 K | 1038 | magnetic | experimental | [3] Pei 1995; _cites Maier 1972_ | p. 4; `ORC-VQNTWFQSZZ` | “Tc of aFe + s-FeSb two phase region is 1038 K \[20\].” |
| Phase transition | 1279.15 K | 1279.15 | other: L = ε-FeSb (solidus); _alloy: Fe 0.55, Sb 0.45_ | experimental | [2] Boa 2008; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 2, p. 3, row 6; `ORC-FGDUD34WNB` |  |
| Phase transition | 1280.15 K | 1280.15 | eutectic: L = ε-FeSb + αFe(e1); _alloy: Fe 0.65, Sb 0.35_ | experimental | [2] Boa 2008 | Table 2, p. 3, row 1; `ORC-52TIWMOJQF` |  |
| Phase transition | 1282.15 K | 1282.15 | other: L = ε-FeSb (solidus); _alloy: Fe 0.55, Sb 0.45_ | experimental | [2] Boa 2008 | Table 2, p. 3, row 5; `ORC-TQGD6HNZH6` |  |
| Phase transition | 1283.15 K | 1283.15 | eutectic: L = ε-FeSb + αFe(e1); _alloy: Fe 0.65, Sb 0.35_ | experimental | [2] Boa 2008; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 2, p. 3, row 2; `ORC-NSVJFBHZF3` |  |
| Phase transition | 1290 K | 1290 | congruent melting: ε-FeSb = L; _ε-FeSb: Sb 0.4258; L: Sb 0.4258_ | model | [3] Pei 1995 | Table 3, p. 8, row 1; `ORC-MLEQOOOIOT` |  |
| Phase transition | 1291 K | 1291 | congruent melting: ε-FeSb = Liq; _ε-FeSb: Sb 0.4168; Liq: Sb 0.4168_ | model | [2] Boa 2008 | Table 10, p. 9, row 1; `ORC-ANDDTBY3CU` |  |
| Phase transition | 1292 K | 1292 | congruent melting: ε-FeSb = L; _ε-FeSb: Sb 0.42; L: Sb 0.42_ | unspecified | [3] Pei 1995; _cites Massalski_ | Table 3, p. 8, row 3; `ORC-3KRMVR4BLA` |  |
| Phase transition | 1292 K | 1292 | congruent melting: ε-FeSb = L; _ε-FeSb: Sb 0.42; L: Sb 0.42_ | unspecified | [3] Pei 1995; _cites ref. 3_ | Table 3, p. 8, row 2; `ORC-INUDHHUXB2` |  |
| Phase transition | 1298.15 K | 1298.15 | congruent melting: ε-FeSb = Liq; _ε-FeSb: Sb 0.43; Liq: Sb 0.43_ | experimental | [2] Boa 2008; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 10, p. 9, row 2; `ORC-R4RGCY2KPX` |  |

### Phase equilibrium (6)

Table: Phase equilibrium, Fe–Sb system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase composition |  | 1204.15 | other: L = ε-FeSb (liquidus); _liquid: Fe 0.3, Sb 0.7_ | experimental | [2] Boa 2008; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 2, p. 3, row 14; `ORC-PJMV7UQBVK` |  |
| Phase composition |  | 1222.15 | other: L = ε-FeSb (liquidus); _liquid: Fe 0.33, Sb 0.67_ | experimental | [2] Boa 2008 | Table 2, p. 3, row 11; `ORC-DEP24GI75L` |  |
| Phase composition |  | 1293.15 | other: L = ε-FeSb (liquidus); _liquid: Fe 0.65, Sb 0.35_ | experimental | [2] Boa 2008 | Table 2, p. 3, row 3; `ORC-7V5XQVKZSB` |  |
| Phase composition |  | 1295.15 | other: L = ε-FeSb (liquidus); _liquid: Fe 0.65, Sb 0.35_ | experimental | [2] Boa 2008; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 2, p. 3, row 4; `ORC-7BLNNGGUJ4` |  |
| Phase composition |  | 1307.15 | other: L = ε-FeSb (liquidus); _liquid: Fe 0.55, Sb 0.45_ | experimental | [2] Boa 2008; _cites Richter 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902597-2) | Table 2, p. 3, row 8; `ORC-I5XHCFFNP2` |  |
| Phase composition |  | 1309.15 | other: L = ε-FeSb (liquidus); _liquid: Fe 0.55, Sb 0.45_ | experimental | [2] Boa 2008 | Table 2, p. 3, row 7; `ORC-YPZPEHGBFT` |  |

## Sources

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

1. Changrong Li, Daiman Zhu, Yubi Zhang, Zhenmin Du, Cuiping Guo, Junqin Li et al., Thermodynamic assessment of the Co–Fe–Sb system, Calphad 47, 23-34 (2014). [doi:10.1016/j.calphad.2014.05.005](https://doi.org/10.1016/j.calphad.2014.05.005)
2. D. Boa, S. Hassam, G. Kra, K.P. Kotchi, J. Rogez, The ternary bismuth–iron–antimony system: Experimental phase diagram study and thermodynamic evaluation, Calphad 32, 227-239 (2008). [doi:10.1016/j.calphad.2008.01.001](https://doi.org/10.1016/j.calphad.2008.01.001)
3. Benyan Pei, Bo Björkman, Bo Sundman, Bo Jansson, A thermodynamic assessment of the iron — Antimony system, Calphad 19, 1-15 (1995). [doi:10.1016/0364-5916(95)00001-u](https://doi.org/10.1016/0364-5916%2895%2900001-u)

## 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/).