# Fe–Tb system

> Fe–Tb system: 45 accepted literature values (invariant reaction 38, phase transition 7) 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-TB.html · Markdown: https://data.orchid-project.org/systems/FE-TB.md

45 accepted literature values from 1 paper(s) (experimental 15, model 30); 3 calculated phase diagram(s). 1 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-TB.json) · [CSV](https://data.orchid-project.org/systems/FE-TB.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#FE-TB) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#FE-TB/FeTb-17Ron.json) · [phases (8)](https://data.orchid-project.org/phases/pages/FE-TB.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/FE-TB.html) · [Markdown](https://data.orchid-project.org/systems/FE-TB.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 15 |
| model | 30 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 38 |
| phase transition | 7 |

## 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 |
|---|---|---|---|
| FeTb-17Ron.tdb | M.H. Rong, X.L. Chen, J. Wang, G.H. Rao, H.Y. Zhou, Calphad, 59, 154-63(2017). [doi:10.1016/j.calphad.2017.10.003](https://doi.org/10.1016/j.calphad.2017.10.003) | `46346f5bff319295d6485f426e1c534c7b986239e67fd24c2aa0128025114e9f` | [viewer](https://orchid-project.org/phase-diagrams/#FE-TB/FeTb-17Ron.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeTb-17Ron.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeTb-17Ron.json) |
| FeTb-23Ye.tdb | H. Ye, M. Rong, Q. Chen, Q. Yao, J. Wang, G. Rao, H. Zhou, J. Mater. Inf., 3, 15(2023). | `0eb2e62ea5c9bc113ee57ca55d8fd8a9acb4dcae874a32118b4648934f51e744` | [viewer](https://orchid-project.org/phase-diagrams/#FE-TB/FeTb-23Ye.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeTb-23Ye.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeTb-23Ye.json) |
| FeTb-94Lan.tdb | S. Landin, J. Agren, J. Alloys Compd., 207-208, 449-53(1994). [doi:10.1016/0925-8388(94)90261-5](https://doi.org/10.1016/0925-8388%2894%2990261-5) | `4276274a275273a7487c0c4d613e47325771b9d1438c927c46120eebc7c69db3` | [viewer](https://orchid-project.org/phase-diagrams/#FE-TB/FeTb-94Lan.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeTb-94Lan.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeTb-94Lan.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| FeTb-17Ron.tdb | 1653.64 | FCC_A1 (x(Tb) 1.300e-4) + BCC_A2 (x(Tb) 6.200e-4) + LIQUID (x(Tb) 0.07765) |
| FeTb-17Ron.tdb | 1653.64 | FCC_A1 (x(Tb) 1.300e-4) + BCC_A2 (x(Tb) 6.200e-4) + LIQUID (x(Tb) 0.07765) |
| FeTb-17Ron.tdb | 1584.44 | FCC_A1 (x(Tb) 1.500e-4) + FE17TB2 (x(Tb) 0.10526) + LIQUID (x(Tb) 0.11199) |
| FeTb-17Ron.tdb | 1584.44 | FCC_A1 (x(Tb) 1.500e-4) + FE17TB2 (x(Tb) 0.10526) + LIQUID (x(Tb) 0.1119) |
| FeTb-17Ron.tdb | 1560.88 | LIQUID (x(Tb) 0.96664) + BCC_A2 (x(Tb) 0.99976) + HCP_A3 (x(Tb) 1) |
| FeTb-17Ron.tdb | 1560.88 | LIQUID (x(Tb) 0.9667) + BCC_A2 (x(Tb) 0.99976) + HCP_A3 (x(Tb) 1) |
| FeTb-17Ron.tdb | 1546.16 | FE17TB2 (x(Tb) 0.10526) + LIQUID (x(Tb) 0.1989) + FE23TB6_D8A (x(Tb) 0.2069) |
| FeTb-17Ron.tdb | 1546.15 | FE17TB2 (x(Tb) 0.10526) + LIQUID (x(Tb) 0.19957) + FE23TB6_D8A (x(Tb) 0.2069) |
| FeTb-17Ron.tdb | 1546.15 | FE17TB2 (x(Tb) 0.10526) + LIQUID (x(Tb) 0.19992) + FE23TB6_D8A (x(Tb) 0.2069) |
| FeTb-17Ron.tdb | 1484.17 | FE23TB6_D8A (x(Tb) 0.2069) + FE3TB (x(Tb) 0.25) + LIQUID (x(Tb) 0.3524) |
| FeTb-17Ron.tdb | 1484.17 | FE23TB6_D8A (x(Tb) 0.2069) + FE3TB (x(Tb) 0.25) + LIQUID (x(Tb) 0.3518) |
| FeTb-17Ron.tdb | 1458.67 | FE3TB (x(Tb) 0.25) + FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.39087) |
| FeTb-17Ron.tdb | 1458.67 | FE3TB (x(Tb) 0.25) + FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.39157) |
| FeTb-17Ron.tdb | 1458.66 | FE3TB (x(Tb) 0.25) + FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.39118) |
| FeTb-17Ron.tdb | 1184.93 | FCC_A1 (x(Tb) 0) + BCC_A2 (x(Tb) 1.000e-5) + FE17TB2 (x(Tb) 0.10526) |
| FeTb-17Ron.tdb | 1184.93 | FCC_A1 (x(Tb) 0) + BCC_A2 (x(Tb) 1.000e-5) + FE17TB2 (x(Tb) 0.10526) |
| FeTb-17Ron.tdb | 1119.25 | FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.69342) + HCP_A3 (x(Tb) 1) |
| FeTb-17Ron.tdb | 1119.25 | FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.69336) + HCP_A3 (x(Tb) 1) |
| FeTb-17Ron.tdb | 1119.25 | FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.6935) + HCP_A3 (x(Tb) 1) |
| FeTb-17Ron.tdb | 1119.25 | FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.6935) + HCP_A3 (x(Tb) 1) |
| FeTb-23Ye.tdb | 1666.88 | FCC_A1 (x(Tb) 1.000e-5) + BCC_A2 (x(Tb) 3.000e-5) + LIQUID (x(Tb) 0.05049) |
| FeTb-23Ye.tdb | 1666.88 | FCC_A1 (x(Tb) 1.000e-5) + BCC_A2 (x(Tb) 3.000e-5) + LIQUID (x(Tb) 0.0505) |
| FeTb-23Ye.tdb | 1666.88 | FCC_A1 (x(Tb) 1.000e-5) + BCC_A2 (x(Tb) 3.000e-5) + LIQUID (x(Tb) 0.05049) |
| FeTb-23Ye.tdb | 1575.15 | FCC_A1 (x(Tb) 1.000e-5) + LIQUID (x(Tb) 0.07639) + FE17TB2 (x(Tb) 0.10526) |
| FeTb-23Ye.tdb | 1575.15 | FCC_A1 (x(Tb) 1.000e-5) + LIQUID (x(Tb) 0.07641) + FE17TB2 (x(Tb) 0.10526) |
| FeTb-23Ye.tdb | 1575.15 | FCC_A1 (x(Tb) 1.000e-5) + LIQUID (x(Tb) 0.07638) + FE17TB2 (x(Tb) 0.10526) |
| FeTb-23Ye.tdb | 1561.4 | LIQUID (x(Tb) 0.96804) + BCC_A2 (x(Tb) 0.99987) + HCP_A3 (x(Tb) 1) |
| FeTb-23Ye.tdb | 1561.4 | LIQUID (x(Tb) 0.96811) + BCC_A2 (x(Tb) 0.99987) + HCP_A3 (x(Tb) 1) |
| FeTb-23Ye.tdb | 1546.59 | FE17TB2 (x(Tb) 0.10526) + LIQUID (x(Tb) 0.16657) + FE23TB6_D8A (x(Tb) 0.2069) |
| FeTb-23Ye.tdb | 1546.59 | FE17TB2 (x(Tb) 0.10526) + LIQUID (x(Tb) 0.16624) + FE23TB6_D8A (x(Tb) 0.2069) |
| FeTb-23Ye.tdb | 1485.39 | FE23TB6_D8A (x(Tb) 0.2069) + FE3TB (x(Tb) 0.25) + LIQUID (x(Tb) 0.31961) |
| FeTb-23Ye.tdb | 1485.39 | FE23TB6_D8A (x(Tb) 0.2069) + FE3TB (x(Tb) 0.25) + LIQUID (x(Tb) 0.31956) |
| FeTb-23Ye.tdb | 1461.48 | FE3TB (x(Tb) 0.25) + FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.34893) |
| FeTb-23Ye.tdb | 1461.48 | FE3TB (x(Tb) 0.25) + FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.34863) |
| FeTb-23Ye.tdb | 1461.48 | FE3TB (x(Tb) 0.25) + FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.34897) |
| FeTb-23Ye.tdb | 1184.82 | BCC_A2 (x(Tb) 0) + FCC_A1 (x(Tb) 0) + FE17TB2 (x(Tb) 0.10526) |
| FeTb-23Ye.tdb | 1116.04 | FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.67484) + HCP_A3 (x(Tb) 1) |
| FeTb-23Ye.tdb | 1116.04 | FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.67465) + HCP_A3 (x(Tb) 1) |
| FeTb-23Ye.tdb | 1116.04 | FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.67502) + HCP_A3 (x(Tb) 1) |
| FeTb-94Lan.tdb | 1637.02 | FCC_A1 (x(Tb) 0.00254) + BCC_A2 (x(Tb) 0.00363) + LIQUID (x(Tb) 0.09819) |
| FeTb-94Lan.tdb | 1578.32 | FCC_A1 (x(Tb) 0.0028) + FE17TB2 (x(Tb) 0.10526) + LIQUID (x(Tb) 0.13399) |
| FeTb-94Lan.tdb | 1578.32 | FCC_A1 (x(Tb) 0.0028) + FE17TB2 (x(Tb) 0.10526) + LIQUID (x(Tb) 0.13387) |
| FeTb-94Lan.tdb | 1560.46 | LIQUID (x(Tb) 0.96474) + BCC_A2 (x(Tb) 0.99882) + HCP_A3 (x(Tb) 0.99915) |
| FeTb-94Lan.tdb | 1542.75 | FE17TB2 (x(Tb) 0.10526) + FE23TB6_D8A (x(Tb) 0.2069) + LIQUID (x(Tb) 0.21167) |
| FeTb-94Lan.tdb | 1542.75 | FE17TB2 (x(Tb) 0.10526) + FE23TB6_D8A (x(Tb) 0.2069) + LIQUID (x(Tb) 0.21131) |
| FeTb-94Lan.tdb | 1542.75 | FE17TB2 (x(Tb) 0.10526) + FE23TB6_D8A (x(Tb) 0.2069) + LIQUID (x(Tb) 0.21193) |
| FeTb-94Lan.tdb | 1482.35 | FE23TB6_D8A (x(Tb) 0.2069) + FE3TB (x(Tb) 0.25) + LIQUID (x(Tb) 0.36103) |
| FeTb-94Lan.tdb | 1482.34 | FE23TB6_D8A (x(Tb) 0.2069) + FE3TB (x(Tb) 0.25) + LIQUID (x(Tb) 0.3616) |
| FeTb-94Lan.tdb | 1482.34 | FE23TB6_D8A (x(Tb) 0.2069) + FE3TB (x(Tb) 0.25) + LIQUID (x(Tb) 0.36179) |
| FeTb-94Lan.tdb | 1482.34 | FE23TB6_D8A (x(Tb) 0.2069) + FE3TB (x(Tb) 0.25) + LIQUID (x(Tb) 0.3618) |
| FeTb-94Lan.tdb | 1455.8 | FE3TB (x(Tb) 0.25) + FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.4043) |
| FeTb-94Lan.tdb | 1455.8 | FE3TB (x(Tb) 0.25) + FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.40366) |
| FeTb-94Lan.tdb | 1455.8 | FE3TB (x(Tb) 0.25) + FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.40467) |
| FeTb-94Lan.tdb | 1185.05 | FCC_A1 (x(Tb) 9.000e-5) + BCC_A2 (x(Tb) 1.100e-4) + FE17TB2 (x(Tb) 0.10526) |
| FeTb-94Lan.tdb | 1122.85 | FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.68684) + HCP_A3 (x(Tb) 0.99865) |
| FeTb-94Lan.tdb | 1122.85 | FE2TB_C15 (x(Tb) 0.33333) + LIQUID (x(Tb) 0.68674) + HCP_A3 (x(Tb) 0.99865) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/FE/FE-TB.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/FE/FE-TB.json) · [CALPHAD hull FeTb-17Ron](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-TB--FeTb-17Ron.json) · [CALPHAD hull FeTb-94Lan](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-TB--FeTb-94Lan.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Fe–Tb system (38)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1667 | metatectic/catatectic: bcc(δ-Fe) ↔ fcc(γ-Fe) + L | L: Tb 0.12 | experimental | [1] Ye 2023; _cites ref. 94_ | Table 6, p. 12, row 1; `ORC-YX4H2ARUE6` |  |
| 1666.9 | metatectic/catatectic: bcc(δ-Fe) ↔ fcc(γ-Fe) + L | L: Tb 0.05 | model | [1] Ye 2023 | Table 6, p. 12, row 4; `ORC-TGTXGJD7L4` |  |
| 1665.1 | metatectic/catatectic: bcc(δ-Fe) ↔ fcc(γ-Fe) + L | L: Tb 0.08 | model | [1] Ye 2023; _cites ref. 104_ | Table 6, p. 12, row 2; `ORC-RKQT2Q6UYO` |  |
| 1664 | metatectic/catatectic: bcc(δ-Fe) ↔ fcc(γ-Fe) + L | L: Tb 0.1 | model | [1] Ye 2023; _cites ref. 27_ | Table 6, p. 12, row 3; `ORC-NVGDGQVHNQ` |  |
| 1585 | peritectic |  | experimental | [1] Ye 2023; _cites ref. 92_ | p. 4; `ORC-YN4F7STSU6.8e4866` | “Four Fe17Tb2, Fe23Tb6, Fe3Tb, and Fe2Tb intermetallic compounds are produced via the peritectic transformation at 1,585 K, 1,549 K, 1,485 K, and 1,460 K, respectively, and Fe17Tb2 is produced at 1,589 K by the congruent melting.” |
| 1579 | eutectic: L ↔ Fe17Tb2 + fcc(γ-Fe) | L: Tb 0.082 | model | [1] Ye 2023; _cites (cal_ | Table 6, p. 12, row 10; `ORC-42RSUC7NNW` |  |
| 1576 | eutectic: L ↔ Fe17Tb2 + fcc(γ-Fe) | L: Tb 0.075 | model | [1] Ye 2023; _cites ref. 27_ | Table 6, p. 12, row 11; `ORC-D65GU5AZFF` |  |
| 1575 | eutectic: L ↔ Fe17Tb2 + fcc(γ-Fe) | L: Tb 0.076 | model | [1] Ye 2023 | Table 6, p. 12, row 12; `ORC-FMNVMD7FAM` |  |
| 1574 | eutectic: L ↔ Fe17Tb2+bcc-Fe |  | experimental | [1] Ye 2023; _cites ref. 95_ | p. 4; `ORC-GEBR6T7Q5F` | “A eutectic reaction (L ↔ Fe17Tb2+bcc-Fe) takes place according to the DTA results\[95\] at 1,574 K.” |
| 1574 | eutectic: L ↔ Fe17Tb2 + fcc(γ-Fe) | L: Tb 0.075 | experimental | [1] Ye 2023; _cites ref. 95_ | Table 6, p. 12, row 9; `ORC-KR66SEFHD6` |  |
| 1549 | eutectic: L ↔ Fe17Tb2 + Fe23Tb6 | L: Tb 0.216 | experimental | [1] Ye 2023; _cites ref. 92_ | Table 6, p. 12, row 17; `ORC-OHOFG2RFJ7` |  |
| 1549 | peritectic |  | experimental | [1] Ye 2023; _cites ref. 92_ | p. 4; `ORC-YN4F7STSU6.59be51` | “Four Fe17Tb2, Fe23Tb6, Fe3Tb, and Fe2Tb intermetallic compounds are produced via the peritectic transformation at 1,585 K, 1,549 K, 1,485 K, and 1,460 K, respectively, and Fe17Tb2 is produced at 1,589 K by the congruent melting.” |
| 1547 | eutectic: L ↔ Fe17Tb2 + Fe23Tb6 |  | experimental | [1] Ye 2023; _cites ref. 95_ | Table 6, p. 12, row 18; `ORC-FRQGNXSGNE` |  |
| 1546.5 | eutectic: L ↔ Fe17Tb2 + Fe23Tb6 | L: Tb 0.167 | model | [1] Ye 2023 | Table 6, p. 12, row 22; `ORC-STMQWBI4C2` |  |
| 1546 | eutectic: L ↔ Fe17Tb2 + Fe23Tb6 | L: Tb 0.208 | model | [1] Ye 2023; _cites ref. 27_ | Table 6, p. 12, row 21; `ORC-4SIMJDA6FA` |  |
| 1546 | eutectic: L ↔ Fe17Tb2 + Fe23Tb6 | L: Tb 0.19 | model | [1] Ye 2023; _cites (cal_ | Table 6, p. 12, row 20; `ORC-SC6W2XS4WX` |  |
| 1542.7 | eutectic: L ↔ Fe17Tb2 + Fe23Tb6 | L: Tb 0.212 | model | [1] Ye 2023; _cites ref. 104_ | Table 6, p. 12, row 19; `ORC-FBC6EJRNX2` |  |
| 1486 | peritectic: L+ Fe23Tb6 ↔ Fe3Tb | L: Tb 0.319 | model | [1] Ye 2023 | Table 6, p. 12, row 29; `ORC-XJC42MXJVZ` |  |
| 1485 | peritectic: L+ Fe23Tb6 ↔ Fe3Tb | L: Tb 0.34 | model | [1] Ye 2023; _cites ref. 27_ | Table 6, p. 12, row 28; `ORC-EC3MD4TQFG` |  |
| 1485 | peritectic: L+ Fe23Tb6 ↔ Fe3Tb | L: Tb 0.349 | experimental | [1] Ye 2023; _cites ref. 92_ | Table 6, p. 12, row 25; `ORC-QGNOM7KFUK` |  |
| 1485 | peritectic |  | experimental | [1] Ye 2023; _cites ref. 92_ | p. 4; `ORC-YN4F7STSU6.64d299` | “Four Fe17Tb2, Fe23Tb6, Fe3Tb, and Fe2Tb intermetallic compounds are produced via the peritectic transformation at 1,585 K, 1,549 K, 1,485 K, and 1,460 K, respectively, and Fe17Tb2 is produced at 1,589 K by the congruent melting.” |
| 1481 | peritectic: L+ Fe23Tb6 ↔ Fe3Tb | L: Tb 0.388 | model | [1] Ye 2023; _cites (cal_ | Table 6, p. 12, row 27; `ORC-CY6VHTPQLX` |  |
| 1473.1 | peritectic: L+ Fe23Tb6 ↔ Fe3Tb | L: Tb 0.361 | model | [1] Ye 2023; _cites ref. 104_ | Table 6, p. 12, row 26; `ORC-IJNIDDVFSE` |  |
| 1462.7 | peritectic: L + Fe3Tb ↔ Fe2Tb | L: Tb 0.348 | model | [1] Ye 2023 | Table 6, p. 12, row 34; `ORC-HLSSDPVIA2` |  |
| 1460 | peritectic: L + Fe3Tb ↔ Fe2Tb | L: Tb 0.405 | model | [1] Ye 2023; _cites ref. 27_ | Table 6, p. 12, row 33; `ORC-BANTTW3XB6` |  |
| 1460 | peritectic: L + Fe3Tb ↔ Fe2Tb | L: Tb 0.412 | experimental | [1] Ye 2023; _cites ref. 92_ | Table 6, p. 12, row 30; `ORC-FXVXVSRM7Q` |  |
| 1460 | peritectic |  | experimental | [1] Ye 2023; _cites ref. 92_ | p. 4; `ORC-YN4F7STSU6.b3175c` | “Four Fe17Tb2, Fe23Tb6, Fe3Tb, and Fe2Tb intermetallic compounds are produced via the peritectic transformation at 1,585 K, 1,549 K, 1,485 K, and 1,460 K, respectively, and Fe17Tb2 is produced at 1,589 K by the congruent melting.” |
| 1459 | peritectic: L + Fe3Tb ↔ Fe2Tb | L: Tb 0.424 | model | [1] Ye 2023; _cites (cal_ | Table 6, p. 12, row 32; `ORC-VFGYBZGZNH` |  |
| 1456.6 | peritectic: L + Fe3Tb ↔ Fe2Tb | L: Tb 0.403 | model | [1] Ye 2023; _cites ref. 104_ | Table 6, p. 12, row 31; `ORC-JYX56J2JUN` |  |
| 1185 | peritectoid: Fe17Tb2 + fcc(γ-Fe) ↔ bcc(α-Fe) |  | model | [1] Ye 2023; _cites ref. 27_ | Table 6, p. 12, row 7; `ORC-AKWIY76VRI` |  |
| 1185 | peritectoid: Fe17Tb2 + fcc(γ-Fe) ↔ bcc(α-Fe) |  | experimental | [1] Ye 2023; _cites ref. 94_ | Table 6, p. 12, row 5; `ORC-UHJKB3DL4H` |  |
| 1184.8 | peritectoid: Fe17Tb2 + fcc(γ-Fe) ↔ bcc(α-Fe) |  | model | [1] Ye 2023; _cites ref. 104_ | Table 6, p. 12, row 6; `ORC-B24BVQPU4Z` |  |
| 1184.8 | peritectoid: Fe17Tb2 + fcc(γ-Fe) ↔ bcc(α-Fe) |  | model | [1] Ye 2023 | Table 6, p. 12, row 8; `ORC-XWV45V2VEP` |  |
| 1123 | eutectic: L ↔ Fe2Tb + hcp-Tb | L: Tb 0.687 | model | [1] Ye 2023; _cites ref. 104_ | Table 6, p. 12, row 36; `ORC-TKVHWPSQJY` |  |
| 1122 | eutectic: L ↔ Fe2Tb + hcp-Tb | L: Tb 0.7 | model | [1] Ye 2023; _cites (cal_ | Table 6, p. 12, row 37; `ORC-WKIYJT5YCR` |  |
| 1120 | eutectic: L ↔ Fe2Tb + hcp-Tb | L: Tb 0.69 | model | [1] Ye 2023; _cites ref. 27_ | Table 6, p. 12, row 38; `ORC-4VGJDHA7IA` |  |
| 1120 | eutectic: L ↔ Fe2Tb + hcp-Tb | L: Tb 0.72 | experimental | [1] Ye 2023; _cites ref. 92_ | Table 6, p. 12, row 35; `ORC-YZCJUECTBF` |  |
| 1117.1 | eutectic: L ↔ Fe2Tb + hcp-Tb | L: Tb 0.675 | model | [1] Ye 2023 | Table 6, p. 12, row 39; `ORC-NQ7ZNMANOJ` |  |

## Other properties

### Phase transition (7)

Table: Phase transition, Fe–Tb system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 1547 K | 1547 | congruent melting: L ↔ Fe23Tb6; _L: Tb 0.207_ | model | [1] Ye 2023; _cites (cal_ | Table 6, p. 12, row 23; `ORC-EO7VEMVE6V` |  |
| Phase transition | 1561.1 K | 1561.1 | congruent melting: L ↔ Fe23Tb6; _L: Tb 0.207_ | model | [1] Ye 2023 | Table 6, p. 12, row 24; `ORC-RGMRBL4SYI` |  |
| Phase transition | 1585 K | 1585 | congruent melting: L ↔ Fe17Tb2; _L: Tb 0.105_ | model | [1] Ye 2023; _cites (cal_ | Table 6, p. 12, row 14; `ORC-3XK6RW72OR` |  |
| Phase transition | 1586 K | 1586 | congruent melting: L ↔ Fe17Tb2; _L: Tb 0.105_ | model | [1] Ye 2023; _cites ref. 27_ | Table 6, p. 12, row 15; `ORC-QHO75K4UTL` |  |
| Phase transition | 1587.5 K | 1587.5 | congruent melting: L ↔ Fe17Tb2; _L: Tb 0.105_ | model | [1] Ye 2023 | Table 6, p. 12, row 16; `ORC-3XTNLITGMQ` |  |
| Phase transition | 1589 K | 1589 | congruent melting: L ↔ Fe17Tb2; _L: Tb 0.105_ | experimental | [1] Ye 2023; _cites ref. 95_ | Table 6, p. 12, row 13; `ORC-UXBFTCNZZU` |  |
| Phase transition | 1589 K | 1589 | congruent transformation | experimental | [1] Ye 2023; _cites ref. 92_ | p. 4; `ORC-YN4F7STSU6.0f8161` | “Four Fe17Tb2, Fe23Tb6, Fe3Tb, and Fe2Tb intermetallic compounds are produced via the peritectic transformation at 1,585 K, 1,549 K, 1,485 K, and 1,460 K, respectively, and Fe17Tb2 is produced at 1,589 K by the congruent melting.” |

## Sources

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

1. Hongjian Ye, Maohua Rong, Qing Chen, Qingrong Yao, Jiang Wang, Guanghui Rao et al., Assessment of phase equilibria and thermodynamic properties in the Fe-RE (RE = rare earth metals) binary systems, J Mater Inf 3 (2023). [doi:10.20517/jmi.2023.08](https://doi.org/10.20517/jmi.2023.08)

## 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/).