# Pd–Se system

> Pd–Se system: 65 accepted literature values (invariant reaction 35, crystal structure 17, phase transition 7, formation 6) and 1 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

65 accepted literature values from 1 paper(s) (experimental 40, model 19, unspecified 6); 1 calculated phase diagram(s). 16 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/PD-SE.json) · [CSV](https://data.orchid-project.org/systems/PD-SE.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#PD-SE) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#PD-SE/PdSe-14Bor.json) · [phases (14)](https://data.orchid-project.org/phases/pages/PD-SE.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/PD-SE.html) · [Markdown](https://data.orchid-project.org/systems/PD-SE.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 40 |
| model | 19 |
| unspecified | 6 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 35 |
| phase transition | 7 |
| formation | 6 |
| crystal structure | 17 |

## 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 |
|---|---|---|---|
| PdSe-14Bor.tdb | S. Bordier, A. Chocard, S. Gosse, J. Nucl. Mater., 451, 120-29(2014). [doi:10.1016/j.jnucmat.2014.03.044](https://doi.org/10.1016/j.jnucmat.2014.03.044) | `e26c4eccbccb63c1866f1fb9d9ab959deb25021b2dc5d916d75d8f488f813525` | [viewer](https://orchid-project.org/phase-diagrams/#PD-SE/PdSe-14Bor.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/PdSe-14Bor.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/PdSe-14Bor.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| PdSe-14Bor.tdb | 1032.5 | LIQUID#2 (x(Se) 0.4384) + PDSE2 (x(Se) 0.66667) + LIQUID (x(Se) 1) |
| PdSe-14Bor.tdb | 1032.5 | LIQUID#2 (x(Se) 0.43845) + PDSE2 (x(Se) 0.66667) + LIQUID (x(Se) 1) |
| PdSe-14Bor.tdb | 954.58 | LIQUID (x(Se) 0.42359) + PD17SE15 (x(Se) 0.46875) + PDSE2 (x(Se) 0.66667) |
| PdSe-14Bor.tdb | 954.58 | LIQUID (x(Se) 0.42329) + PD17SE15 (x(Se) 0.46875) + PDSE2 (x(Se) 0.66667) |
| PdSe-14Bor.tdb | 954.58 | LIQUID (x(Se) 0.42334) + PD17SE15 (x(Se) 0.46875) + PDSE2 (x(Se) 0.66667) |
| PdSe-14Bor.tdb | 910.06 | FCC_A1 (x(Se) 0.01181) + PD9SE2 (x(Se) 0.18182) + LIQUID (x(Se) 0.20016) |
| PdSe-14Bor.tdb | 910.06 | FCC_A1 (x(Se) 0.0118) + PD9SE2 (x(Se) 0.18182) + LIQUID (x(Se) 0.20014) |
| PdSe-14Bor.tdb | 890.81 | PD17SE15 (x(Se) 0.46875) + PDSE (x(Se) 0.5) + PDSE2 (x(Se) 0.66667) |
| PdSe-14Bor.tdb | 818.06 | PD9SE2 (x(Se) 0.18182) + PD4SE_HT (x(Se) 0.2) + LIQUID (x(Se) 0.23335) |
| PdSe-14Bor.tdb | 818.06 | PD9SE2 (x(Se) 0.18182) + PD4SE_HT (x(Se) 0.2) + LIQUID (x(Se) 0.23332) |
| PdSe-14Bor.tdb | 811.27 | PD4SE_HT (x(Se) 0.2) + PD7SE2 (x(Se) 0.22222) + LIQUID (x(Se) 0.23618) |
| PdSe-14Bor.tdb | 811.27 | PD4SE_HT (x(Se) 0.2) + PD7SE2 (x(Se) 0.22222) + LIQUID (x(Se) 0.23618) |
| PdSe-14Bor.tdb | 800.35 | PD4SE_HT (x(Se) 0.2) + PD4SE_LT (x(Se) 0.2) + PD7SE2 (x(Se) 0.22222) |
| PdSe-14Bor.tdb | 800.35 | PD9SE2 (x(Se) 0.18182) + PD4SE_HT (x(Se) 0.2) + PD4SE_LT (x(Se) 0.2) |
| PdSe-14Bor.tdb | 703.97 | PD7SE2 (x(Se) 0.22222) + PD34SE11 (x(Se) 0.24444) + LIQUID (x(Se) 0.2811) |
| PdSe-14Bor.tdb | 703.97 | PD7SE2 (x(Se) 0.22222) + PD34SE11 (x(Se) 0.24444) + LIQUID (x(Se) 0.28109) |
| PdSe-14Bor.tdb | 703.97 | PD7SE2 (x(Se) 0.22222) + PD34SE11 (x(Se) 0.24444) + LIQUID (x(Se) 0.28116) |
| PdSe-14Bor.tdb | 687.31 | LIQUID (x(Se) 0.31384) + PD7SE4 (x(Se) 0.36364) + PD17SE15 (x(Se) 0.46875) |
| PdSe-14Bor.tdb | 687.31 | LIQUID (x(Se) 0.314) + PD7SE4 (x(Se) 0.36364) + PD17SE15 (x(Se) 0.46875) |
| PdSe-14Bor.tdb | 687.31 | LIQUID (x(Se) 0.31377) + PD7SE4 (x(Se) 0.36364) + PD17SE15 (x(Se) 0.46875) |
| PdSe-14Bor.tdb | 673.64 | FCC_A1 (x(Se) 0.0158) + PD9SE2 (x(Se) 0.18182) + PD4SE_LT (x(Se) 0.2) |
| PdSe-14Bor.tdb | 673.64 | FCC_A1 (x(Se) 0.0158) + PD9SE2 (x(Se) 0.18182) + PD4SE_LT (x(Se) 0.2) |
| PdSe-14Bor.tdb | 659.21 | PD34SE11 (x(Se) 0.24444) + LIQUID (x(Se) 0.29817) + PD7SE4 (x(Se) 0.36364) |
| PdSe-14Bor.tdb | 659.21 | PD34SE11 (x(Se) 0.24444) + LIQUID (x(Se) 0.29806) + PD7SE4 (x(Se) 0.36364) |
| PdSe-14Bor.tdb | 494 | PDSE2 (x(Se) 0.66667) + HEXAGONAL_A8 (x(Se) 1) + LIQUID (x(Se) 1) |
| PdSe-14Bor.tdb | 468.56 | PD17SE15 (x(Se) 0.46875) + PDSE (x(Se) 0.5) + PDSE2 (x(Se) 0.66667) |

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

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Pd–Se system (35)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 955 | Liq + PdSe2 -> Pd17Se15 | PdSe2: Se 0.666667; Pd17Se15: Se 0.46875 | model | [1] Bordier 2014 | Table 4, p. 8, row 22; `ORC-UPLOEN5E7E` |  |
| 953 | Liq + PdSe2 -> Pd17Se15 | PdSe2: Se 0.666667; Pd17Se15: Se 0.46875 | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 4, p. 8, row 21; `ORC-FTVOM6VWQX` |  |
| 910 | eutectic: Liq -> FCC + Pd9Se2 | Pd9Se2: Se 0.181818 | model | [1] Bordier 2014 | Table 4, p. 8, row 4; `ORC-OOXE3DZRES` |  |
| 908 | eutectic: Liq -> FCC + Pd9Se2 | Pd9Se2: Se 0.181818 | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 4, p. 8, row 2; `ORC-SBVQTDO55S` |  |
| 908 | eutectic: Liq -> FCC + Pd9Se2 | Pd9Se2: Se 0.181818 | experimental | [1] Bordier 2014 | Table 4, p. 8, row 3; `ORC-ULQJSOHWJI` |  |
| 898 | eutectic: Liq -> FCC + Pd9Se2 | Pd9Se2: Se 0.181818 | experimental | [1] Bordier 2014; _cites Takabatake 1987_ [doi](https://doi.org/10.1016/0022-5088%2887%2990444-9) | Table 4, p. 8, row 1; `ORC-M3R4PPLNF2` |  |
| 893 | Pd17Se15 + PdSe2 -> PdSe | Pd17Se15: Se 0.46875; PdSe2: Se 0.666667; PdSe: Se 0.5 | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 4, p. 8, row 23; `ORC-6LEZ2DBL6U` |  |
| 892 | Pd17Se15 + PdSe2 -> PdSe | Pd17Se15: Se 0.46875; PdSe2: Se 0.666667; PdSe: Se 0.5 | model | [1] Bordier 2014 | Table 4, p. 8, row 24; `ORC-RTQFXHWN5B` |  |
| 818 | Liq + Pd9Se2 -> β-Pd4Se | Pd9Se2: Se 0.181818; β-Pd4Se: Se 0.2 | model | [1] Bordier 2014 | Table 4, p. 8, row 8; `ORC-KF4FYKZLKM` |  |
| 817 | Liq + Pd9Se2 -> β-Pd4Se | Pd9Se2: Se 0.181818; β-Pd4Se: Se 0.2 | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 4, p. 8, row 6; `ORC-AFDKOFM24F` |  |
| 816 | Liq + Pd9Se2 -> β-Pd4Se | Pd9Se2: Se 0.181818; β-Pd4Se: Se 0.2 | experimental | [1] Bordier 2014 | Table 4, p. 8, row 7; `ORC-WXR3E3EKBZ` |  |
| 811 | Liq + β-Pd4Se -> Pd7Se2 | β-Pd4Se: Se 0.2; Pd7Se2: Se 0.222222 | model | [1] Bordier 2014 | Table 4, p. 8, row 12; `ORC-FH7SH3Z4RD` |  |
| 811 | Liq + β-Pd4Se -> Pd7Se2 | β-Pd4Se: Se 0.2; Pd7Se2: Se 0.222222 | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 4, p. 8, row 10; `ORC-LP7VAG4YZB` |  |
| 808 | Liq + β-Pd4Se -> Pd7Se2 | β-Pd4Se: Se 0.2; Pd7Se2: Se 0.222222 | experimental | [1] Bordier 2014 | Table 4, p. 8, row 11; `ORC-KGZZHEC7DH` |  |
| 803 | Liq + Pd9Se2 -> β-Pd4Se | Pd9Se2: Se 0.181818; β-Pd4Se: Se 0.2 | experimental | [1] Bordier 2014; _cites Takabatake 1987_ [doi](https://doi.org/10.1016/0022-5088%2887%2990444-9) | Table 4, p. 8, row 5; `ORC-EXTGTT6WLJ` |  |
| 796 | Liq + β-Pd4Se -> Pd7Se2 | β-Pd4Se: Se 0.2; Pd7Se2: Se 0.222222 | experimental | [1] Bordier 2014; _cites Takabatake 1987_ [doi](https://doi.org/10.1016/0022-5088%2887%2990444-9) | Table 4, p. 8, row 9; `ORC-QKALFGX3BE` |  |
| 706 | Liq + Pd7Se2 -> Pd34Se11 | Pd7Se2: Se 0.222222; Pd34Se11: Se 0.244444 | experimental | [1] Bordier 2014 | Table 4, p. 8, row 15; `ORC-DYQ5SA4VDK` |  |
| 704 | Liq + Pd7Se2 -> Pd34Se11 | Pd7Se2: Se 0.222222; Pd34Se11: Se 0.244444 | model | [1] Bordier 2014 | Table 4, p. 8, row 16; `ORC-U3J3OLL2XP` |  |
| 703 | Liq + Pd7Se2 -> Pd34Se11 | Pd7Se2: Se 0.222222; Pd34Se11: Se 0.244444 | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 4, p. 8, row 14; `ORC-LDB4ATMWOU` |  |
| 698 | Liq + Pd7Se2 -> Pd34Se11 | Pd7Se2: Se 0.222222; Pd34Se11: Se 0.244444 | experimental | [1] Bordier 2014; _cites Takabatake 1987_ [doi](https://doi.org/10.1016/0022-5088%2887%2990444-9) | Table 4, p. 8, row 13; `ORC-RZNWFEPEMQ` |  |
| 688 | Liq + Pd17Se15 -> Pd7Se4 | Pd17Se15: Se 0.46875; Pd7Se4: Se 0.363636 | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 4, p. 8, row 18; `ORC-4RVDN5JTD4` |  |
| 688 | Liq + Pd17Se15 -> Pd7Se4 | Pd17Se15: Se 0.46875; Pd7Se4: Se 0.363636 | experimental | [1] Bordier 2014 | Table 4, p. 8, row 19; `ORC-RGWRBIKAR6` |  |
| 687 | Liq + Pd17Se15 -> Pd7Se4 | Pd17Se15: Se 0.46875; Pd7Se4: Se 0.363636 | model | [1] Bordier 2014 | Table 4, p. 8, row 20; `ORC-IER4VFGLV5` |  |
| 683 | Liq + Pd17Se15 -> Pd7Se4 | Pd17Se15: Se 0.46875; Pd7Se4: Se 0.363636 | experimental | [1] Bordier 2014; _cites Takabatake 1987_ [doi](https://doi.org/10.1016/0022-5088%2887%2990444-9) | Table 4, p. 8, row 17; `ORC-ZXYS6OHXXV` |  |
| 674 | Pd9Se2 -> FCC + α-Pd4Se | Pd9Se2: Se 0.181818; α-Pd4Se: Se 0.2 | model | [1] Bordier 2014 | Table 4, p. 8, row 38; `ORC-YAOVQRDGPW` |  |
| 670 | Pd9Se2 -> FCC + α-Pd4Se | Pd9Se2: Se 0.181818; α-Pd4Se: Se 0.2 | experimental | [1] Bordier 2014 | Table 4, p. 8, row 37; `ORC-56WVQKPTF3` |  |
| 663 | Pd9Se2 -> FCC + α-Pd4Se | Pd9Se2: Se 0.181818; α-Pd4Se: Se 0.2 | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 4, p. 8, row 36; `ORC-LGPDPM2ZXI` |  |
| 662 | eutectic: Liq -> Pd34Se11 + Pd7Se4 | Pd34Se11: Se 0.244444; Pd7Se4: Se 0.363636 | experimental | [1] Bordier 2014 | Table 4, p. 8, row 31; `ORC-BYSXU6BUJA` |  |
| 659 | eutectic: Liq -> Pd34Se11 + Pd7Se4 | Pd34Se11: Se 0.244444; Pd7Se4: Se 0.363636 | model | [1] Bordier 2014 | Table 4, p. 8, row 32; `ORC-FWCFWJL4KB` |  |
| 658 | Pd9Se2 -> FCC + α-Pd4Se | Pd9Se2: Se 0.181818; α-Pd4Se: Se 0.2 | experimental | [1] Bordier 2014; _cites Takabatake 1987_ [doi](https://doi.org/10.1016/0022-5088%2887%2990444-9) | Table 4, p. 8, row 35; `ORC-HEIRG74OHI` |  |
| 658 | eutectic: Liq -> Pd34Se11 + Pd7Se4 | Pd34Se11: Se 0.244444; Pd7Se4: Se 0.363636 | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 4, p. 8, row 30; `ORC-SJLTELWR3W` |  |
| 655 | eutectic: Liq -> Pd34Se11 + Pd7Se4 | Pd34Se11: Se 0.244444; Pd7Se4: Se 0.363636 | experimental | [1] Bordier 2014; _cites Takabatake 1987_ [doi](https://doi.org/10.1016/0022-5088%2887%2990444-9) | Table 4, p. 8, row 29; `ORC-4YR6ESY3FT` |  |
| 648 | eutectic: Liq -> Pd34Se11 + Pd17Se15 | Pd34Se11: Se 0.244444; Pd17Se15: Se 0.46875 | experimental | [1] Bordier 2014 | Table 4, p. 8, row 33; `ORC-YKJNXJEDN6` |  |
| 646 | eutectic: Liq -> Pd34Se11 + Pd17Se15 | Pd34Se11: Se 0.244444; Pd17Se15: Se 0.46875 | model | [1] Bordier 2014 | Table 4, p. 8, row 34; `ORC-GOPYP2N5TQ` |  |
| 468 | PdSe -> PdSe2 + Pd17Se15 | PdSe: Se 0.5; PdSe2: Se 0.666667; Pd17Se15: Se 0.46875 | model | [1] Bordier 2014 | Table 4, p. 8, row 39; `ORC-QFKBWKBT7S` |  |

## 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, Pd–Se system (6)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Pd1.133Se |  | -72.68 kJ/mol (basis unstated) ± 0.82 | 298.15 | model |  |  | [1] Bordier 2014; _cites Stolyarova 2011_ [doi](https://doi.org/10.1134/s0016702911030098) | Table 3, p. 7, row 9; `ORC-UXEK7KXI32.2d22a7` |  |
| Pd1.133Se |  | -72.17 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Bordier 2014 | Table 3, p. 7, row 10; `ORC-NJHWKGGJY7.fb1e59` |  |
| Pd1.133Se (i.e. Pd17Se15) |  | -72.68 kJ/mol (basis unstated) ± 0.82 | 298.15 | experimental |  |  | [1] Bordier 2014; _cites Stolyarova 2011_ [doi](https://doi.org/10.1134/s0016702911030098) | Table 2, p. 3, row 3; `ORC-CRYG5DNRFE.9624a3` |  |
| PdSe2 |  | -86.67 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Bordier 2014 | Table 3, p. 7, row 8; `ORC-AHH2DZA4O4.e95e8d` |  |
| PdSe2 |  | -86.4 kJ/mol (basis unstated) ± 1.8 | 298.15 | experimental |  |  | [1] Bordier 2014; _cites Stolyarova 2011_ [doi](https://doi.org/10.1134/s0016702911030098) | Table 2, p. 3, row 3; `ORC-CRYG5DNRFE.8689c7` |  |
| PdSe2 |  | -86.4 kJ/mol (basis unstated) ± 1.8 | 298.15 | model |  |  | [1] Bordier 2014; _cites Stolyarova 2011_ [doi](https://doi.org/10.1134/s0016702911030098) | Table 3, p. 7, row 7; `ORC-FLTG4SH4DZ.07bbdf` |  |

## Other properties

### Phase transition (7)

Table: Phase transition, Pd–Se system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 468 K | 468 | other | model | [1] Bordier 2014 | p. 7; `ORC-Q7YG7Z6MY6.f3bfc5` | “Its low temperature of decomposition is calculated at 468 K, in accordance with the 473 K value recommanded by Vymazalová \[14\].” |
| Phase transition | 473 K | 473 | other | experimental | [1] Bordier 2014; _cites Vymazalova 2013_ | p. 7; `ORC-Q7YG7Z6MY6.4463b6` | “Its low temperature of decomposition is calculated at 468 K, in accordance with the 473 K value recommanded by Vymazalová \[14\].” |
| Phase transition | 705 K | 705 | other | experimental | [1] Bordier 2014 | p. 7; `ORC-ERLTT77UY6.69a25b` | “The liquidus at 759 K and the decomposition of Pd34 Se11 measured at 705 K are consistent with Olsen et al. \[3\].” |
| Phase transition | 788 K | 788 | β-Pd4Se -> α; _β-Pd4Se: Se 0.2; α: Se 0.2_ | experimental | [1] Bordier 2014; _cites Takabatake 1987_ [doi](https://doi.org/10.1016/0022-5088%2887%2990444-9) | Table 4, p. 8, row 25; `ORC-TGYT2QOILI` |  |
| Phase transition | 800 K | 800 | β-Pd4Se -> α; _β-Pd4Se: Se 0.2; α: Se 0.2_ | experimental | [1] Bordier 2014 | Table 4, p. 8, row 27; `ORC-4JXAAWF35R` |  |
| Phase transition | 800 K | 800 | β-Pd4Se -> α; _β-Pd4Se: Se 0.2; α: Se 0.2_ | model | [1] Bordier 2014 | Table 4, p. 8, row 28; `ORC-IYFLK5VSHU` |  |
| Phase transition | 800 K | 800 | β-Pd4Se -> α; _β-Pd4Se: Se 0.2; α: Se 0.2_ | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 4, p. 8, row 26; `ORC-MREYKDL5F4` |  |

### Crystal structure (17)

Table: Crystal structure, Pd–Se system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 10.606 Å | 298.15 | Pd17Se15; _alloy: Se 0.46875_ | experimental | [1] Bordier 2014; _cites Kjekshus 1960_ [doi](https://doi.org/10.3891/acta.chem.scand.14-1623) | Table 1, p. 2, row 7; `ORC-6HUIPEKQ4H` |  |
| Lattice a | 21.413 Å | 298.15 | Pd34Se11; _alloy: Se 0.244444_ | unspecified | [1] Bordier 2014; _cites Sato 1989_ | Table 1, p. 2, row 5; `ORC-GCIBWO3CF6.deab53` |  |
| Lattice a | 9.441 Å | 298.15 | Pd7Se2; _alloy: Se 0.222222_ | unspecified | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 1, p. 2, row 4; `ORC-QZNC3ZAGKN.7dc8f6` |  |
| Lattice a | 10.162 Å | 298.15 | Pd7Se4; _alloy: Se 0.363636_ | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 1, p. 2, row 6; `ORC-AJPIC7ZBET.6e5eeb` |  |
| Lattice a | 11.5646 not_printed | 298.15 | PdSe; _alloy: Se 0.5_ | model | [1] Bordier 2014; _cites Ijjaal 2001_ | Table 1, p. 2, row 8; `ORC-MUP2AMN2RE.3c74d3` |  |
| Lattice a | 5.741 Å | 298.15 | PdSe2; _alloy: Se 0.666667_ | experimental | [1] Bordier 2014; _cites Grnvold 1957_ [doi](https://doi.org/10.1107/s0365110x57000948) | Table 1, p. 2, row 9; `ORC-WK3XST5IW2.d89117` |  |
| Lattice a | 5.2324 Å | 298.15 | α-Pd4Se; _alloy: Se 0.2_ | experimental | [1] Bordier 2014; _cites Grnvold 1962_ [doi](https://doi.org/10.1107/s0365110x62000031) | Table 1, p. 2, row 2; `ORC-LSX55PHBBT.4ac48e` |  |
| Lattice b | 5.504 Å | 298.15 | Pd34Se11; _alloy: Se 0.244444_ | unspecified | [1] Bordier 2014; _cites Sato 1989_ | Table 1, p. 2, row 5; `ORC-GCIBWO3CF6.ab2890` |  |
| Lattice b | 5.37 Å | 298.15 | Pd7Se2; _alloy: Se 0.222222_ | unspecified | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 1, p. 2, row 4; `ORC-QZNC3ZAGKN.9a90c2` |  |
| Lattice b | 6.863 Å | 298.15 | Pd7Se4; _alloy: Se 0.363636_ | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 1, p. 2, row 6; `ORC-AJPIC7ZBET.60184e` |  |
| Lattice b | 5.866 Å | 298.15 | PdSe2; _alloy: Se 0.666667_ | experimental | [1] Bordier 2014; _cites Grnvold 1957_ [doi](https://doi.org/10.1107/s0365110x57000948) | Table 1, p. 2, row 9; `ORC-WK3XST5IW2.bd87d3` |  |
| Lattice c | 12.03 Å | 298.15 | Pd34Se11; _alloy: Se 0.244444_ | unspecified | [1] Bordier 2014; _cites Sato 1989_ | Table 1, p. 2, row 5; `ORC-GCIBWO3CF6.c1fbfc` |  |
| Lattice c | 5.495 Å | 298.15 | Pd7Se2; _alloy: Se 0.222222_ | unspecified | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 1, p. 2, row 4; `ORC-QZNC3ZAGKN.b3ac76` |  |
| Lattice c | 5.375 Å | 298.15 | Pd7Se4; _alloy: Se 0.363636_ | experimental | [1] Bordier 2014; _cites Olsen 1979_ [doi](https://doi.org/10.3891/acta.chem.scand.33a-0251) | Table 1, p. 2, row 6; `ORC-AJPIC7ZBET.0e9dd2` |  |
| Lattice c | 6.9978 not_printed ± 6.000e-4 | 298.15 | PdSe; _alloy: Se 0.5_ | model | [1] Bordier 2014; _cites Ijjaal 2001_ | Table 1, p. 2, row 8; `ORC-MUP2AMN2RE.006a06` |  |
| Lattice c | 7.691 Å | 298.15 | PdSe2; _alloy: Se 0.666667_ | experimental | [1] Bordier 2014; _cites Grnvold 1957_ [doi](https://doi.org/10.1107/s0365110x57000948) | Table 1, p. 2, row 9; `ORC-WK3XST5IW2.9a008f` |  |
| Lattice c | 5.647 Å | 298.15 | α-Pd4Se; _alloy: Se 0.2_ | experimental | [1] Bordier 2014; _cites Grnvold 1962_ [doi](https://doi.org/10.1107/s0365110x62000031) | Table 1, p. 2, row 2; `ORC-LSX55PHBBT.c4ab13` |  |

## Sources

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

1. S. Bordier, A. Chocard, S. Gossé, Thermodynamic assessment of the palladium–selenium (Pd–Se) system, Journal of Nuclear Materials 451, 120-129 (2014). [doi:10.1016/j.jnucmat.2014.03.044](https://doi.org/10.1016/j.jnucmat.2014.03.044)

## 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/).