# Eu–Pd system

> Eu–Pd system: 42 accepted literature values (formation 20, invariant reaction 16, phase transition 5, mixing / partial 1) and 1 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/EU-PD.html · Markdown: https://data.orchid-project.org/systems/EU-PD.md

42 accepted literature values from 2 paper(s) (experimental 10, model 32); 1 calculated phase diagram(s).

Data: [JSON](https://data.orchid-project.org/literature/systems/EU-PD.json) · [CSV](https://data.orchid-project.org/systems/EU-PD.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#EU-PD) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#EU-PD/EuPd-01Du-LB.json) · [phases (11)](https://data.orchid-project.org/phases/pages/EU-PD.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/EU-PD.html) · [Markdown](https://data.orchid-project.org/systems/EU-PD.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 10 |
| model | 32 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 16 |
| phase transition | 5 |
| formation | 20 |
| mixing / partial | 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 |
|---|---|---|---|
| EuPd-01Du-LB.tdb | Z. Du, Y. He, J. Alloys Compd., 327, 127-31(2001). [doi:10.1016/S0925-8388(01)01411-6](https://doi.org/10.1016/S0925-8388%2801%2901411-6) | `108635fcb4bb16a26e242ab2423d09ffa5186de2e8e7e6bbf2e7d7bc7505acbf` | [viewer](https://orchid-project.org/phase-diagrams/#EU-PD/EuPd-01Du-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/EuPd-01Du-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/EuPd-01Du-LB.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| EuPd-01Du-LB.tdb | 1602.12 | EUPD2_C15 (x(Pd) 0.66667) + LIQUID (x(Pd) 0.68267) + EUPD3_L12 (x(Pd) 0.75) |
| EuPd-01Du-LB.tdb | 1602.12 | EUPD2_C15 (x(Pd) 0.66667) + LIQUID (x(Pd) 0.68289) + EUPD3_L12 (x(Pd) 0.75) |
| EuPd-01Du-LB.tdb | 1602.12 | EUPD2_C15 (x(Pd) 0.66667) + LIQUID (x(Pd) 0.68267) + EUPD3_L12 (x(Pd) 0.75) |
| EuPd-01Du-LB.tdb | 1377.41 | EUPD3_L12 (x(Pd) 0.75) + EUPD5 (x(Pd) 0.83333) + LIQUID (x(Pd) 0.86292) |
| EuPd-01Du-LB.tdb | 1377.41 | EUPD3_L12 (x(Pd) 0.75) + EUPD5 (x(Pd) 0.83333) + LIQUID (x(Pd) 0.86291) |
| EuPd-01Du-LB.tdb | 1353.09 | EUPD5 (x(Pd) 0.83333) + LIQUID (x(Pd) 0.87135) + FCC_A1 (x(Pd) 0.91066) |
| EuPd-01Du-LB.tdb | 1125.23 | LIQUID (x(Pd) 0.49916) + EUPD_B33 (x(Pd) 0.5) + EUPD2_C15 (x(Pd) 0.66667) |
| EuPd-01Du-LB.tdb | 1125.23 | LIQUID (x(Pd) 0.49938) + EUPD_B33 (x(Pd) 0.5) + EUPD2_C15 (x(Pd) 0.66667) |
| EuPd-01Du-LB.tdb | 1052.37 | EU3PD2 (x(Pd) 0.4) + LIQUID (x(Pd) 0.43884) + EUPD_B33 (x(Pd) 0.5) |
| EuPd-01Du-LB.tdb | 1052.37 | EU3PD2 (x(Pd) 0.4) + LIQUID (x(Pd) 0.43875) + EUPD_B33 (x(Pd) 0.5) |
| EuPd-01Du-LB.tdb | 1052.37 | EU3PD2 (x(Pd) 0.4) + LIQUID (x(Pd) 0.43895) + EUPD_B33 (x(Pd) 0.5) |
| EuPd-01Du-LB.tdb | 882.9 | LIQUID (x(Pd) 0.27847) + EU5PD2 (x(Pd) 0.28571) + EU3PD2 (x(Pd) 0.4) |
| EuPd-01Du-LB.tdb | 882.9 | LIQUID (x(Pd) 0.27873) + EU5PD2 (x(Pd) 0.28571) + EU3PD2 (x(Pd) 0.4) |
| EuPd-01Du-LB.tdb | 850.13 | EUPD5 (x(Pd) 0.83333) + EUPD7 (x(Pd) 0.875) + FCC_A1 (x(Pd) 0.91845) |
| EuPd-01Du-LB.tdb | 850.13 | EUPD5 (x(Pd) 0.83333) + EUPD7 (x(Pd) 0.875) + FCC_A1 (x(Pd) 0.91845) |
| EuPd-01Du-LB.tdb | 850.13 | EUPD5 (x(Pd) 0.83333) + EUPD7 (x(Pd) 0.875) + FCC_A1 (x(Pd) 0.91845) |
| EuPd-01Du-LB.tdb | 817.43 | BCC_A2 (x(Pd) 0) + LIQUID (x(Pd) 0.18068) + EU5PD2 (x(Pd) 0.28571) |
| EuPd-01Du-LB.tdb | 817.43 | BCC_A2 (x(Pd) 0) + LIQUID (x(Pd) 0.18053) + EU5PD2 (x(Pd) 0.28571) |
| EuPd-01Du-LB.tdb | 817.43 | BCC_A2 (x(Pd) 0) + LIQUID (x(Pd) 0.1802) + EU5PD2 (x(Pd) 0.28571) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/EU/EU-PD.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/EU/EU-PD.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Eu–Pd system (16)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1603 | eutectic: liq.->EuPd2+EuPd3 | liq.: Pd 0.665; EuPd2: Pd 0.666667; EuPd3: Pd 0.75 | experimental | [1] Du 2001; _cites Iandelli 1974_ [doi](https://doi.org/10.1016/0022-5088%2874%2990197-0) | Table 2, p. 3, row 13; `ORC-6EX7TD2B7W` |  |
| 1602 | eutectic: liq.->EuPd2+EuPd3 | liq.: Pd 0.6827; EuPd2: Pd 0.666667; EuPd3: Pd 0.75 | model | [1] Du 2001 | Table 2, p. 3, row 12; `ORC-G4VK7R63QB` |  |
| 1378 | liq.+EuPd3->EuPd5 | liq.: Pd 0.8629; EuPd3: Pd 0.75; EuPd5: Pd 0.833333 | model | [1] Du 2001 | Table 2, p. 3, row 16; `ORC-42I4HLHQFH` |  |
| 1378 | liq.+EuPd3->EuPd5 | liq.: Pd 0.865; EuPd3: Pd 0.75; EuPd5: Pd 0.833333 | experimental | [1] Du 2001; _cites Iandelli 1974_ [doi](https://doi.org/10.1016/0022-5088%2874%2990197-0) | Table 2, p. 3, row 17; `ORC-DUXUXFG623` |  |
| 1353 | eutectic: liq.->EuPd5+fcc(Pd) | liq.: Pd 0.875; EuPd5: Pd 0.833333; fcc(Pd): Pd 0.905 | experimental | [1] Du 2001; _cites Iandelli 1974_ [doi](https://doi.org/10.1016/0022-5088%2874%2990197-0) | Table 2, p. 3, row 19; `ORC-72VI2FWZEP` |  |
| 1353 | eutectic: liq.->EuPd5+fcc(Pd) | liq.: Pd 0.8713; EuPd5: Pd 0.833333; fcc(Pd): Pd 0.8907 | model | [1] Du 2001 | Table 2, p. 3, row 18; `ORC-7RPYYT2KH7` |  |
| 1128 | liq.+EuPd2->EuPd | liq.: Pd 0.495; EuPd2: Pd 0.666667; EuPd: Pd 0.5 | experimental | [1] Du 2001; _cites Iandelli 1974_ [doi](https://doi.org/10.1016/0022-5088%2874%2990197-0) | Table 2, p. 3, row 10; `ORC-4WXLKQZUR4` |  |
| 1125 | liq.+EuPd2->EuPd | liq.: Pd 0.4992; EuPd2: Pd 0.666667; EuPd: Pd 0.5 | model | [1] Du 2001 | Table 2, p. 3, row 9; `ORC-67IJABBP5M` |  |
| 1052 | eutectic: liq.->Eu3Pd2+EuPd | liq.: Pd 0.4388; Eu3Pd2: Pd 0.4; EuPd: Pd 0.5 | model | [1] Du 2001 | Table 2, p. 3, row 7; `ORC-YO5TUQ3TWE` |  |
| 1048 | eutectic: liq.->Eu3Pd2+EuPd | liq.: Pd 0.42; Eu3Pd2: Pd 0.4; EuPd: Pd 0.5 | experimental | [1] Du 2001; _cites Iandelli 1974_ [doi](https://doi.org/10.1016/0022-5088%2874%2990197-0) | Table 2, p. 3, row 8; `ORC-5FBUPZHS2U` |  |
| 883 | liq.+Eu3Pd2->Eu5Pd2 | liq.: Pd 0.263; Eu3Pd2: Pd 0.4; Eu5Pd2: Pd 0.285714 | experimental | [1] Du 2001; _cites Iandelli 1974_ [doi](https://doi.org/10.1016/0022-5088%2874%2990197-0) | Table 2, p. 3, row 4; `ORC-YBXQLCX5T4` |  |
| 883 | liq.+Eu3Pd2->Eu5Pd2 | liq.: Pd 0.2785; Eu3Pd2: Pd 0.4; Eu5Pd2: Pd 0.285714 | model | [1] Du 2001 | Table 2, p. 3, row 3; `ORC-YFMMS36IUF` |  |
| 850 | EuPd5+fcc(Pd)->EuPd7 | EuPd5: Pd 0.833333; fcc(Pd): Pd 0.9185; EuPd7: Pd 0.875 | model | [1] Du 2001 | Table 2, p. 3, row 20; `ORC-GMHYCDOPQ6` |  |
| 850 | EuPd5+fcc(Pd)->EuPd7 | EuPd5: Pd 0.833333; fcc(Pd): Pd 0.9; EuPd7: Pd 0.875 | experimental | [1] Du 2001; _cites Takao 1990_ [doi](https://doi.org/10.1007/bf00585433) | Table 2, p. 3, row 21; `ORC-ODCILR6KX4` |  |
| 818 | eutectic: liq.->bcc(Eu)+Eu5Pd2 | liq.: Pd 0.175; bcc(Eu): Pd 0; Eu5Pd2: Pd 0.285714 | experimental | [1] Du 2001; _cites Iandelli 1974_ [doi](https://doi.org/10.1016/0022-5088%2874%2990197-0) | Table 2, p. 3, row 2; `ORC-OUNO2WEH24` |  |
| 817 | eutectic: liq.->bcc(Eu)+Eu5Pd2 | liq.: Pd 0.1805; bcc(Eu): Pd 0; Eu5Pd2: Pd 0.285714 | model | [1] Du 2001 | Table 2, p. 3, row 1; `ORC-CXQ6YO5W2N` |  |

## 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, Eu–Pd system (7)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Pd2Eu | [EuPd2](https://data.orchid-project.org/compounds/EuPd2.html) | -104.63 kJ/mol-atom | 298.15 | model | -69.372 (mp-aaaaacti) | -85.545 (oqmd-30126) | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 61; `ORC-FGZWWKVWQ7.5f3ec1` |  |
| Pd2Eu5 | [Eu5Pd2](https://data.orchid-project.org/compounds/Eu5Pd2.html) | -44.766 kJ/mol-atom | 298.15 | model | -47.438 (mp-aaackwba) | -59.161 (oqmd-30128) | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 13; `ORC-O5OHKWXOCU.0c201e` |  |
| Pd3Eu | [EuPd3](https://data.orchid-project.org/compounds/EuPd3.html) | -95.334 kJ/mol-atom | 298.15 | model | -51.853 (mp-aaabkfgh) | -64.877 (oqmd-30129) | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 3; `ORC-4LX5DQWPEX.504fef` |  |
| Pd3Eu | [EuPd3](https://data.orchid-project.org/compounds/EuPd3.html) | -51.176 kJ/mol-atom | 298.15 | model | -51.853 (mp-aaabkfgh) | -64.877 (oqmd-30129) | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 73; `ORC-UKEXNZEPB4.6716e7` |  |
| Pd7Eu |  | -51.176 kJ/mol-atom | 298.15 | model |  |  | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 73; `ORC-UKEXNZEPB4.935ecb` |  |
| Pd7RE |  | -51.176 kJ/mol-atom | 298.15 | model |  |  | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 6, row 7; `ORC-VU47UWWOUU.7cb653` |  |
| PdEu | [EuPd](https://data.orchid-project.org/compounds/EuPd.html) | -78.545 kJ/mol-atom | 298.15 | model | -67.611 (mp-aaacfydn) | -83.46 (oqmd-30127) | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 23; `ORC-EHNKQWZHQE.5af827` |  |

## Other properties

### Phase transition (5)

Table: Phase transition, Eu–Pd system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 1082 K | 1082 | liq.->Eu3Pd2; _liq.: Pd 0.4; Eu3Pd2: Pd 0.4_ | model | [1] Du 2001 | Table 2, p. 3, row 5; `ORC-ML4IQRKWYT` |  |
| Phase transition | 1083 K | 1083 | liq.->Eu3Pd2; _liq.: Pd 0.4; Eu3Pd2: Pd 0.4_ | experimental | [1] Du 2001; _cites Iandelli 1974_ [doi](https://doi.org/10.1016/0022-5088%2874%2990197-0) | Table 2, p. 3, row 6; `ORC-RIUKQ4VVI4` |  |
| Phase transition | 1607 K | 1607 | liq.->EuPd2; _liq.: Pd 0.6667; EuPd2: Pd 0.666667_ | model | [1] Du 2001 | Table 2, p. 3, row 11; `ORC-LOBWTCFKB3` |  |
| Phase transition | 1698 K | 1698 | liq.->EuPd3; _liq.: Pd 0.75; EuPd3: Pd 0.75_ | model | [1] Du 2001 | Table 2, p. 3, row 14; `ORC-NES6X7BJFR` |  |
| Phase transition | 1698 K | 1698 | liq.->EuPd3; _liq.: Pd 0.75; EuPd3: Pd 0.75_ | experimental | [1] Du 2001; _cites Iandelli 1974_ [doi](https://doi.org/10.1016/0022-5088%2874%2990197-0) | Table 2, p. 3, row 15; `ORC-OTVIVQNYH7` |  |

### Formation (13)

Table: Formation, Eu–Pd system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Entropy of formation; _printed: ΔfS_ | 9.236 J/mol-atom/K | 298.15 | Pd2Eu; _alloy: Eu 0.333333, Pd 0.666667_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 61; `ORC-FGZWWKVWQ7.235937` |  |
| Entropy of formation; _printed: ΔfS_ | -13.95 J/mol-atom/K | 298.15 | Pd2Eu5; _alloy: Eu 0.714286, Pd 0.285714_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 13; `ORC-O5OHKWXOCU.9e5fb3` |  |
| Entropy of formation | 10.83 J/mol-atom/K | 298.15 | Pd3Eu; _alloy: Eu 0.25, Pd 0.75_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 3; `ORC-4LX5DQWPEX.7652f9` |  |
| Entropy of formation; _printed: ΔfS_ | 6.2 J/mol-atom/K | 298.15 | Pd3Eu; _alloy: Eu 0.25, Pd 0.75_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 73; `ORC-UKEXNZEPB4.982096` |  |
| Entropy of formation | 6.2 J/mol-atom/K | 298.15 | Pd7Eu; _alloy: Eu 0.125, Pd 0.875_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 73; `ORC-UKEXNZEPB4.af05f9` |  |
| Entropy of formation; _printed: Entropies of formation_ | 6.2 J/mol-atom/K | 298.15 | Pd7RE; _alloy: Eu 0.125, Pd 0.875_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 6, row 7; `ORC-VU47UWWOUU.f32bfb` |  |
| Entropy of formation; _printed: ΔfS_ | 8.461 J/mol-atom/K | 298.15 | PdEu; _alloy: Eu 0.5, Pd 0.5_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 23; `ORC-EHNKQWZHQE.42231d` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -107.384 kJ/mol-atom | 298.15 | Pd2Eu; _alloy: Eu 0.333333, Pd 0.666667_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 61; `ORC-FGZWWKVWQ7.3bb7f1` |  |
| Gibbs energy of formation; _printed: Gibbs free energy of formation_ | -40.6068 kJ/mol-atom | 298.15 | Pd2Eu5; _alloy: Eu 0.714286, Pd 0.285714_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 13; `ORC-O5OHKWXOCU.aeac36` |  |
| Gibbs energy of formation; _printed: Gibbs free energy of formation_ | -98.563 kJ/mol-atom | 298.15 | Pd3Eu; _alloy: Eu 0.25, Pd 0.75_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 3; `ORC-4LX5DQWPEX.2dc1e3` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -53.0245 kJ/mol-atom | 298.15 | Pd3Eu; _alloy: Eu 0.25, Pd 0.75_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 73; `ORC-UKEXNZEPB4.0af65b` |  |
| Gibbs energy of formation; _printed: Gibbs free energy of formation_ | -53.0245 kJ/mol-atom | 298.15 | Pd7Eu; _alloy: Eu 0.125, Pd 0.875_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 73; `ORC-UKEXNZEPB4.8dada9` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -81.0676 kJ/mol-atom | 298.15 | PdEu; _alloy: Eu 0.5, Pd 0.5_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 5, row 23; `ORC-EHNKQWZHQE.659f03` |  |

### Mixing / partial (1)

Table: Mixing / partial, Eu–Pd system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Gibbs energy of mixing; _printed: Gibbs free Energies_ | -53.0245 kJ/mol-atom | 298.15 | Pd7RE; _alloy: Eu 0.125, Pd 0.875_ | model | [2] Kardellass 2020; _cites Du 2001_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901411-6) | Table 3, p. 6, row 7; `ORC-VU47UWWOUU.07f1fa` |  |

## Sources

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

1. Zhenmin Du, Yuntao He, Thermodynamic assessment of the Eu–Pd system, Journal of Alloys and Compounds 327, 127-131 (2001). [doi:10.1016/s0925-8388(01)01411-6](https://doi.org/10.1016/s0925-8388%2801%2901411-6)
2. Said Kardellass, Colette Servant, Isabelle Drouelle, Fatima Zahra Chrifi-Alaoui, Mohamed Idbenali, Alyen Abahazem et al., Calphad-type assessment of the Pd-Yb binary system supported by first-principles calculations – Part II: Results, Materials Today: Proceedings 24, 140-150 (2020). [doi:10.1016/j.matpr.2019.08.196](https://doi.org/10.1016/j.matpr.2019.08.196)

## 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/).