# Mg–Pb system

> Mg–Pb system: 108 accepted literature values (invariant reaction 39, mixing / partial 34, formation 20, crystal structure 15) and 3 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/MG-PB.html · Markdown: https://data.orchid-project.org/systems/MG-PB.md

108 accepted literature values from 2 paper(s) (experimental 75, model 8, DFT 25); 3 calculated phase diagram(s). 3 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/MG-PB.json) · [CSV](https://data.orchid-project.org/systems/MG-PB.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#MG-PB) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#MG-PB/MgPb-14Zha-ass.json) · [phases (5)](https://data.orchid-project.org/phases/pages/MG-PB.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/MG-PB.html) · [Markdown](https://data.orchid-project.org/systems/MG-PB.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 75 |
| model | 8 |
| DFT | 25 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 39 |
| formation | 20 |
| mixing / partial | 34 |
| crystal structure | 15 |

## 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 |
|---|---|---|---|
| MgPb-14Zha-ass.tdb | F. Zhang, Y. Tang, B. Hu, S. Liu, Y. Du, Y. Zhang, J. Mining Metall. B, 50, 115-26(2014). [doi:10.2298/JMMB130824017Z](https://doi.org/10.2298/JMMB130824017Z) | `85fd9842fb3b047b174bb8ea0aa4180c55f330ea6ed8d382e68b70d35176eee5` | [viewer](https://orchid-project.org/phase-diagrams/#MG-PB/MgPb-14Zha-ass.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/MgPb-14Zha-ass.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/MgPb-14Zha-ass.json) |
| MgPb-14Zha-sub.tdb | F. Zhang, Y. Tang, B. Hu, S. Liu, Y. Du, Y. Zhang, J. Mining Metall. B, 50, 115-26(2014). [doi:10.2298/JMMB130824017Z](https://doi.org/10.2298/JMMB130824017Z) | `715ddff6aaa4430b25aa0f8cdf6aaf3cedba16a959a325ee2296dd0115216f95` | [viewer](https://orchid-project.org/phase-diagrams/#MG-PB/MgPb-14Zha-sub.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/MgPb-14Zha-sub.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/MgPb-14Zha-sub.json) |
| MgPb-21Deb.tdb | A. Debski, W. Gierlotka, S. Terlicka, W. Gasior, J. Alloys Compd., 861, 158396(2021). [doi:10.1016/j.jallcom.2020.158396](https://doi.org/10.1016/j.jallcom.2020.158396) | `c150e3ea46f0693a9b94b7525b2e9bc582d587422f87b8306031baa270a07340` | [viewer](https://orchid-project.org/phase-diagrams/#MG-PB/MgPb-21Deb.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/MgPb-21Deb.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/MgPb-21Deb.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| MgPb-14Zha-ass.tdb | 736.95 | HCP_A3 (x(Pb) 0.07406) + LIQUID (x(Pb) 0.19307) + MG2PB_C1 (x(Pb) 0.33333) |
| MgPb-14Zha-ass.tdb | 519.12 | MG2PB_C1 (x(Pb) 0.33333) + LIQUID (x(Pb) 0.82445) + FCC_A1 (x(Pb) 0.94669) |
| MgPb-14Zha-sub.tdb | 732 | HCP_A3 (x(Pb) 0.0871) + LIQUID (x(Pb) 0.16514) + MG2PB_C1 (x(Pb) 0.33333) |
| MgPb-14Zha-sub.tdb | 732 | HCP_A3 (x(Pb) 0.08706) + LIQUID (x(Pb) 0.16507) + MG2PB_C1 (x(Pb) 0.33333) |
| MgPb-14Zha-sub.tdb | 517.29 | MG2PB_C1 (x(Pb) 0.33333) + LIQUID (x(Pb) 0.80661) + FCC_A1 (x(Pb) 0.94652) |
| MgPb-14Zha-sub.tdb | 517.29 | MG2PB_C1 (x(Pb) 0.33333) + LIQUID (x(Pb) 0.807) + FCC_A1 (x(Pb) 0.94662) |
| MgPb-21Deb.tdb | 734.48 | HCP_A3 (x(Pb) 0.08463) + LIQUID (x(Pb) 0.17679) + MG2PB_C1 (x(Pb) 0.33333) |
| MgPb-21Deb.tdb | 519.1 | MG2PB_C1 (x(Pb) 0.33333) + LIQUID (x(Pb) 0.81728) + FCC_A1 (x(Pb) 0.93764) |
| MgPb-21Deb.tdb | 519.1 | MG2PB_C1 (x(Pb) 0.33333) + LIQUID (x(Pb) 0.81743) + FCC_A1 (x(Pb) 0.93772) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/MG/MG-PB.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/MG/MG-PB.json) · [CALPHAD hull MgPb-14Zha-ass](https://data.orchid-project.org/hulls/calphad-sgte/MG/MG-PB--MgPb-14Zha-ass.json) · [CALPHAD hull MgPb-14Zha-sub](https://data.orchid-project.org/hulls/calphad-sgte/MG/MG-PB--MgPb-14Zha-sub.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Mg–Pb system (39)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 824.1 | congruent melting: Liquid=Mg2Pb | Liquid: Pb 0.3333; Mg2Pb: Pb 0.3333 | model | [1] Zhang 2014 | Table 3, p. 6, row 6; `ORC-4YUTLXPNWQ` |  |
| 823.4 | congruent melting: Liquid=Mg2Pb | Liquid: Pb 0.3333; Mg2Pb: Pb 0.3333 | model | [1] Zhang 2014 | Table 3, p. 6, row 7; `ORC-XPLNTAZW3J` |  |
| 823.15 | congruent melting: Liquid=Mg2Pb | Liquid: Pb 0.3333; Mg2Pb: Pb 0.3333 | experimental | [1] Zhang 2014; _cites Dobovisek 1965_ | Table 3, p. 6, row 3; `ORC-33GR7V3VID` |  |
| 823.15 | congruent melting: Liquid=Mg2Pb | Liquid: Pb 0.3333; Mg2Pb: Pb 0.3333 | experimental | [1] Zhang 2014; _cites Kurnakow 1905_ | Table 3, p. 6, row 5; `ORC-BLAOXCTOT7` |  |
| 823.15 | congruent melting: Liquid=Mg2Pb | Liquid: Pb 0.3333; Mg2Pb: Pb 0.3333 | experimental | [1] Zhang 2014; _cites Knappwost 1959_ | Table 3, p. 6, row 4; `ORC-GNHRGYNMBR` |  |
| 822.65 | congruent melting: Liquid=Mg2Pb | Liquid: Pb 0.3333; Mg2Pb: Pb 0.3333 | experimental | [1] Zhang 2014; _cites Grethe 1959_ | Table 3, p. 6, row 1; `ORC-KPQPILRGIL` |  |
| 822.15 | congruent melting: Liquid=Mg2Pb | Liquid: Pb 0.35; Mg2Pb: Pb 0.35 | experimental | [1] Zhang 2014; _cites Eldridge 1965_ | Table 3, p. 6, row 2; `ORC-TWPLZFH5U7` |  |
| 748.15 | eutectic: Liquid=Mg2Pb+(Mg) | Liquid: Pb 0.2; Mg2Pb: Pb 0.3333 | experimental | [1] Zhang 2014; _cites Kurnakow 1905_ | Table 3, p. 6, row 13; `ORC-DPUKDTGVLT` |  |
| 748.15 | L = HCP_A3 (Mg)+ Mg2Pb | L: Pb 0.2; Mg2Pb: Pb 0.333 | experimental | [2] Dębski 2021; _cites Kurnakov 1933_ | Table 5, p. 7, row 7; `ORC-R6TZ4IH3MH` |  |
| 739.35 | eutectic: Liquid=Mg2Pb+(Mg) | Liquid: Pb 0.191; Mg2Pb: Pb 0.3333; (Mg): Pb 0.0775 | experimental | [1] Zhang 2014; _cites Eldridge 1965_ | Table 3, p. 6, row 8; `ORC-P36MTF3E5U` |  |
| 739.35 | L = HCP_A3 (Mg)+ Mg2Pb | L: Pb 0.191; Mg2Pb: Pb 0.333; HCP_A3 (Mg): Pb 0.0775 | experimental | [2] Dębski 2021; _cites Eldridge 1967_ | Table 5, p. 7, row 2; `ORC-V2VU2R6TMZ` |  |
| 739.15 | L = HCP_A3 (Mg)+ Mg2Pb | Mg2Pb: Pb 0.333; HCP_A3 (Mg): Pb 0.0714 | experimental | [2] Dębski 2021; _cites Foote 1941_ | Table 5, p. 7, row 4; `ORC-EZ46E5G3D3` |  |
| 739.15 | eutectic: Liquid=Mg2Pb+(Mg) | Mg2Pb: Pb 0.3333; (Mg): Pb 0.0714 | experimental | [1] Zhang 2014; _cites Foote 1941_ | Table 3, p. 6, row 10; `ORC-NY7MEPESMS` |  |
| 739.15 | eutectic: Liquid=Mg2Pb+(Mg) | Liquid: Pb 0.191; Mg2Pb: Pb 0.3333; (Mg): Pb 0.091 | experimental | [1] Zhang 2014; _cites Vosskuhler 1939_ | Table 3, p. 6, row 12; `ORC-SHXFTTP6OZ` |  |
| 739.15 | L = HCP_A3 (Mg)+ Mg2Pb | Mg2Pb: Pb 0.333; HCP_A3 (Mg): Pb 0.078 | experimental | [2] Dębski 2021; _cites Dobovisek 1965_ | Table 5, p. 7, row 3; `ORC-WFM4FAQ44Y` |  |
| 739.15 | L = HCP_A3 (Mg)+ Mg2Pb | L: Pb 0.191; Mg2Pb: Pb 0.333; HCP_A3 (Mg): Pb 0.091 | experimental | [2] Dębski 2021; _cites Vosskuhler 1939_ | Table 5, p. 7, row 6; `ORC-X7V2IPOBVR` |  |
| 739.15 | eutectic: Liquid=Mg2Pb+(Mg) | Mg2Pb: Pb 0.3333; (Mg): Pb 0.078 | experimental | [1] Zhang 2014; _cites Dobovisek 1965_ | Table 3, p. 6, row 9; `ORC-YTNTIYVZJB` |  |
| 739 | L = HCP_A3 (Mg)+ Mg2Pb | L: Pb 0.191; Mg2Pb: Pb 0.333; HCP_A3 (Mg): Pb 0.075 | experimental | [2] Dębski 2021; _cites Nayeb-Hashemi 1985_ [doi](https://doi.org/10.1007/bf02871188) | Table 5, p. 7, row 9; `ORC-N45MUIRTX2` |  |
| 739 | L = HCP_A3 (Mg)+ Mg2Pb | L: Pb 0.175; Mg2Pb: Pb 0.333; HCP_A3 (Mg): Pb 0.083 | model | [2] Dębski 2021 | Table 5, p. 7, row 1; `ORC-UBOMNFIZB6` |  |
| 738.15 | L = HCP_A3 (Mg)+ Mg2Pb | L: Pb 0.191; Mg2Pb: Pb 0.333; HCP_A3 (Mg): Pb 0.0975 | experimental | [2] Dębski 2021; _cites Raynor 1940_ | Table 5, p. 7, row 5; `ORC-FGVRTDPW7V` |  |
| 738.15 | eutectic: Liquid=Mg2Pb+(Mg) | Liquid: Pb 0.191; Mg2Pb: Pb 0.3333; (Mg): Pb 0.0975 | experimental | [1] Zhang 2014; _cites Raynor 1940_ | Table 3, p. 6, row 11; `ORC-QDVIP5CIWL` |  |
| 737.05 | eutectic: Liquid=Mg2Pb+(Mg) | Liquid: Pb 0.1929; Mg2Pb: Pb 0.3333; (Mg): Pb 0.0741 | model | [1] Zhang 2014 | Table 3, p. 6, row 16; `ORC-VGSM6L45TF` |  |
| 732.15 | L = HCP_A3 (Mg)+ Mg2Pb | L: Pb 0.192; Mg2Pb: Pb 0.333 | experimental | [2] Dębski 2021; _cites Grube 1905_ [doi](https://doi.org/10.1002/zaac.19050440107) | Table 5, p. 7, row 8; `ORC-QOQKVKVKF4` |  |
| 732.15 | eutectic: Liquid=Mg2Pb+(Mg) | Liquid: Pb 0.192; Mg2Pb: Pb 0.3333 | experimental | [1] Zhang 2014; _cites Grube 1905_ | Table 3, p. 6, row 14; `ORC-XTDBMS4CNI` |  |
| 732 | eutectic: Liquid=Mg2Pb+(Mg) | Liquid: Pb 0.1651; Mg2Pb: Pb 0.3333; (Mg): Pb 0.0871 | model | [1] Zhang 2014 | Table 3, p. 6, row 15; `ORC-34WUMD5CBY` |  |
| 526.15 | eutectic: Liquid=Mg2Pb+(Pb) | Liquid: Pb 0.843; Mg2Pb: Pb 0.3333; (Pb): Pb 1 | experimental | [1] Zhang 2014; _cites Kurnakow 1905_ | Table 3, p. 6, row 20; `ORC-3UTBJBIKRF` |  |
| 526 | L = Mg2Pb + FCC_A1(Mg) | L: Pb 0.84; Mg2Pb: Pb 0.333; FCC_A1(Mg): Pb 1 | experimental | [2] Dębski 2021; _cites Kurnakov 1905_ | Table 5, p. 7, row 14; `ORC-UBPEMHXYIS` |  |
| 525.15 | eutectic: Liquid=Mg2Pb+(Pb) | Mg2Pb: Pb 0.3333; (Pb): Pb 0.941 | experimental | [1] Zhang 2014; _cites Dobovisek 1965_ | Table 3, p. 6, row 19; `ORC-NOOMU5FNR2` |  |
| 525 | L = Mg2Pb + FCC_A1(Mg) | Mg2Pb: Pb 0.333; FCC_A1(Mg): Pb 0.941 | experimental | [2] Dębski 2021; _cites Vosskuhler 1939_ | Table 5, p. 7, row 13; `ORC-KJTQVYJOWH` |  |
| 522 | L = Mg2Pb + FCC_A1(Mg) | L: Pb 0.83; Mg2Pb: Pb 0.333; FCC_A1(Mg): Pb 0.94 | experimental | [2] Dębski 2021; _cites Nayeb-Hashemi 1985_ [doi](https://doi.org/10.1007/bf02871188) | Table 5, p. 7, row 16; `ORC-AWJYMXJLOW` |  |
| 521.85 | L = Mg2Pb + FCC_A1(Mg) | L: Pb 0.83; Mg2Pb: Pb 0.333 | experimental | [2] Dębski 2021; _cites Raynor 1940_ | Table 5, p. 7, row 12; `ORC-MJPXXQCHKM` |  |
| 521.85 | eutectic: Liquid=Mg2Pb+(Pb) | Liquid: Pb 0.83; Mg2Pb: Pb 0.3333 | experimental | [1] Zhang 2014; _cites Eldridge 1965_ | Table 3, p. 6, row 18; `ORC-VHR7JPZAEG` |  |
| 521.15 | L = Mg2Pb + FCC_A1(Mg) | L: Pb 0.835; Mg2Pb: Pb 0.333; FCC_A1(Mg): Pb 0.947 | experimental | [2] Dębski 2021; _cites Horsley 1957_ | Table 5, p. 7, row 11; `ORC-FHEPKNKMUW` |  |
| 521.15 | eutectic: Liquid=Mg2Pb+(Pb) | Liquid: Pb 0.835; Mg2Pb: Pb 0.3333; (Pb): Pb 0.947 | experimental | [1] Zhang 2014; _cites Graham 1971_ | Table 3, p. 6, row 17; `ORC-XQM4ZBTHYF` |  |
| 521 | L = Mg2Pb + FCC_A1(Mg) | L: Pb 0.82; Mg2Pb: Pb 0.333; FCC_A1(Mg): Pb 0.94 | model | [2] Dębski 2021 | Table 5, p. 7, row 10; `ORC-HRTXEJ4DWK` |  |
| 520.22 | eutectic: Liquid=Mg2Pb+(Pb) | Liquid: Pb 0.8265; Mg2Pb: Pb 0.3333; (Pb): Pb 0.9463 | model | [1] Zhang 2014 | Table 3, p. 6, row 23; `ORC-FJ5WI7MT5A` |  |
| 520.15 | eutectic: Liquid=Mg2Pb+(Pb) | Liquid: Pb 0.7915; Mg2Pb: Pb 0.3333; (Pb): Pb 1 | experimental | [1] Zhang 2014; _cites Grube 1905_ | Table 3, p. 6, row 21; `ORC-ES5OUXRJBM` |  |
| 520 | L = Mg2Pb + FCC_A1(Mg) | L: Pb 0.79; Mg2Pb: Pb 0.333; FCC_A1(Mg): Pb 1 | experimental | [2] Dębski 2021; _cites Grube 1905_ [doi](https://doi.org/10.1002/zaac.19050440107) | Table 5, p. 7, row 15; `ORC-7YMQ5NOXOH` |  |
| 517.29 | eutectic: Liquid=Mg2Pb+(Pb) | Liquid: Pb 0.807; Mg2Pb: Pb 0.3333; (Pb): Pb 0.9466 | model | [1] Zhang 2014 | Table 3, p. 6, row 22; `ORC-YGZZGLSNII` |  |

## 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, Mg–Pb system (20)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Mg2Pb |  | -11.6747 kJ/mol-atom | 0 | DFT |  |  | [2] Dębski 2021; _cites JARVIS_ | Table 3, p. 4, row 13; `ORC-BWSJBFCMPP.02d7e8` |  |
| Mg2Pb |  | -11.674 kJ/mol-atom | 0 | DFT |  |  | [2] Dębski 2021; _cites JARVIS_ | Table 3, p. 4, row 13; `ORC-BWSJBFCMPP.a54de9` |  |
| Mg2Pb |  | -6.13647 kJ/mol-atom | 0 | DFT |  |  | [2] Dębski 2021; _cites Automatic_ | Table 3, p. 4, row 15; `ORC-ZUMCL4UJPS.5bc953` |  |
| Mg2Pb |  | -6.136 kJ/mol-atom | 0 | DFT |  |  | [2] Dębski 2021; _cites Automatic_ | Table 3, p. 4, row 15; `ORC-ZUMCL4UJPS.990fb4` |  |
| Mg2Pb |  | -6.07858 kJ/mol-atom | 0 | DFT |  |  | [2] Dębski 2021; _cites The_ | Table 3, p. 4, row 14; `ORC-3UZCHZNEXO.d73652` |  |
| Mg2Pb |  | -6.078 kJ/mol-atom | 0 | DFT |  |  | [2] Dębski 2021; _cites The_ | Table 3, p. 4, row 14; `ORC-3UZCHZNEXO.73fa6b` |  |
| Mg2Pb |  | -5.978 kJ/mol-atom | 0 | DFT |  |  | [2] Dębski 2021 | Table 3, p. 4, row 6; `ORC-MEFBATBWAD.aa99c6` |  |
| Mg2Pb |  | -5.97244 kJ/mol-atom | 0 | DFT |  |  | [2] Dębski 2021 | Table 3, p. 4, row 6; `ORC-MEFBATBWAD.d41c01` |  |
| Mg2Pb | [Mg2Pb](https://data.orchid-project.org/compounds/Mg2Pb.html) | -5.9 kJ/mol-atom |  | experimental | -5.451 (mp-aaaaberc) | -6.083 (oqmd-17637) | [2] Dębski 2021; _cites at 943 K_ | Table 3, p. 4, row 11; `ORC-XSC6EPABZQ.4d8b85` |  |
| Mg2Pb | [Mg2Pb](https://data.orchid-project.org/compounds/Mg2Pb.html) | -5.89525 kJ/mol-atom |  | experimental | -5.451 (mp-aaaaberc) | -6.083 (oqmd-17637) | [2] Dębski 2021; _cites at 943 K_ | Table 3, p. 4, row 11; `ORC-XSC6EPABZQ.56a13f` |  |
| Mg2Pb | [Mg2Pb](https://data.orchid-project.org/compounds/Mg2Pb.html) | -5.855 kJ/mol-atom |  | experimental | -5.451 (mp-aaaaberc) | -6.083 (oqmd-17637) | [2] Dębski 2021; _cites Dobovisek 1965_ | Table 3, p. 4, row 9; `ORC-6NMZMDWEIZ.6c25ee` |  |
| Mg2Pb | [Mg2Pb](https://data.orchid-project.org/compounds/Mg2Pb.html) | -5.855 kJ/mol-atom |  | experimental | -5.451 (mp-aaaaberc) | -6.083 (oqmd-17637) | [2] Dębski 2021; _cites Seith 1937_ | Table 3, p. 4, row 7; `ORC-BRBEV2CMMI.7deb20` |  |
| Mg2Pb | [Mg2Pb](https://data.orchid-project.org/compounds/Mg2Pb.html) | -5.84701 kJ/mol-atom |  | experimental | -5.451 (mp-aaaaberc) | -6.083 (oqmd-17637) | [2] Dębski 2021; _cites Dobovisek 1965_ | Table 3, p. 4, row 9; `ORC-6NMZMDWEIZ.e16ce5` |  |
| Mg2Pb | [Mg2Pb](https://data.orchid-project.org/compounds/Mg2Pb.html) | -5.84701 kJ/mol-atom |  | experimental | -5.451 (mp-aaaaberc) | -6.083 (oqmd-17637) | [2] Dębski 2021; _cites Seith 1937_ | Table 3, p. 4, row 7; `ORC-BRBEV2CMMI.f3b1dd` |  |
| Mg2Pb | [Mg2Pb](https://data.orchid-project.org/compounds/Mg2Pb.html) | -5.533 kJ/mol-atom |  | experimental | -5.451 (mp-aaaaberc) | -6.083 (oqmd-17637) | [2] Dębski 2021; _cites Dobovisek 1965_ | Table 3, p. 4, row 10; `ORC-UN5ZR3DH4R.a5aded` |  |
| Mg2Pb | [Mg2Pb](https://data.orchid-project.org/compounds/Mg2Pb.html) | -5.52861 kJ/mol-atom |  | experimental | -5.451 (mp-aaaaberc) | -6.083 (oqmd-17637) | [2] Dębski 2021; _cites Dobovisek 1965_ | Table 3, p. 4, row 10; `ORC-UN5ZR3DH4R.9ee812` |  |
| Mg2Pb | [Mg2Pb](https://data.orchid-project.org/compounds/Mg2Pb.html) | -5.5 kJ/mol-atom |  | experimental | -5.451 (mp-aaaaberc) | -6.083 (oqmd-17637) | [2] Dębski 2021; _cites Grethe 1959_ | Table 3, p. 4, row 8; `ORC-VASZEU4BTD.47e16d` |  |
| Mg2Pb | [Mg2Pb](https://data.orchid-project.org/compounds/Mg2Pb.html) | -5.49966 kJ/mol-atom |  | experimental | -5.451 (mp-aaaaberc) | -6.083 (oqmd-17637) | [2] Dębski 2021; _cites Grethe 1959_ | Table 3, p. 4, row 8; `ORC-VASZEU4BTD.11e7a0` |  |
| Mg2Pb |  | -4.24535 kJ/mol-atom | 0 | DFT |  |  | [2] Dębski 2021; _cites Materials_ | Table 3, p. 4, row 12; `ORC-52NEUIMXXM.75397e` |  |
| Mg2Pb |  | -4.245 kJ/mol-atom | 0 | DFT |  |  | [2] Dębski 2021; _cites Materials_ | Table 3, p. 4, row 12; `ORC-52NEUIMXXM.67b2a3` |  |

## Other properties

### Mixing / partial (34)

Table: Mixing / partial, Mg–Pb system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Enthalpy of mixing; _printed: ΔmixH_ | -4.267 kJ/mol (basis unstated) ± 0.108 | 1012 | liquid; _alloy: Mg 0.25, Pb 0.75_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 10; `ORC-7X6VMMQSK3.a073c4` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -2.331 kJ/mol (basis unstated) ± 0.057 | 1012 | liquid; _alloy: Mg 0.139, Pb 0.861_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 9; `ORC-E7JBGPMQHL.34bb05` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -7.9 kJ/mol (basis unstated) ± 0.194 | 1012 | liquid; _alloy: Mg 0.5, Pb 0.5_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 3; `ORC-GDBEZR33OB.63d4cf` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -8.849 kJ/mol (basis unstated) ± 0.201 | 1012 | liquid; _alloy: Mg 0.6117, Pb 0.3883_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 1; `ORC-VU3QP4GPMX.6f52cb` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -7.824 kJ/mol (basis unstated) ± 0.386 | 1012 | liquid; _alloy: Mg 0.75, Pb 0.25_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 2; `ORC-WKFJYYJU7Q.c126ae` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -4.739 kJ/mol (basis unstated) ± 0.128 | 1014 | liquid; _alloy: Mg 0.289, Pb 0.711_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 5; `ORC-33DIP27NAD.49f9bc` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -8.776 kJ/mol (basis unstated) ± 0.148 | 1014 | liquid; _alloy: Mg 0.5497, Pb 0.4503_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 15; `ORC-3XWCWW3WMQ.3a13cc` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -2.877 kJ/mol (basis unstated) ± 0.035 | 1014 | liquid; _alloy: Mg 0.1765, Pb 0.8235_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 11; `ORC-5R73BHJRWY.76d905` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -6.941 kJ/mol (basis unstated) ± 0.091 | 1014 | liquid; _alloy: Mg 0.4066, Pb 0.5934_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 13; `ORC-73FBSRMRIP.d93bd8` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -7.847 kJ/mol (basis unstated) ± 0.274 | 1014 | liquid; _alloy: Mg 0.5, Pb 0.5_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 8; `ORC-CUNDFVQZJ3.a7e3c7` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -5.012 kJ/mol (basis unstated) ± 0.066 | 1014 | liquid; _alloy: Mg 0.3047, Pb 0.6953_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 12; `ORC-KCJWD4UQMA.66c429` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -2.789 kJ/mol (basis unstated) ± 0.066 | 1014 | liquid; _alloy: Mg 0.1666, Pb 0.8334_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 4; `ORC-P7I44EJCPF.667b06` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -8.991 kJ/mol (basis unstated) ± 0.179 | 1014 | liquid; _alloy: Mg 0.5983, Pb 0.4017_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 16; `ORC-RNJLGLJCUB.825219` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -7.282 kJ/mol (basis unstated) ± 0.226 | 1014 | liquid; _alloy: Mg 0.4479, Pb 0.5521_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 7; `ORC-SLGZC4OML5.06e8dd` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -9.067 kJ/mol (basis unstated) ± 0.21 | 1014 | liquid; _alloy: Mg 0.6402, Pb 0.3598_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 17; `ORC-VYTHIIEOPM.7bdb1d` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -6.286 kJ/mol (basis unstated) ± 0.176 | 1014 | liquid; _alloy: Mg 0.3782, Pb 0.6218_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 6; `ORC-X5BGTTDP4L.2e3645` |  |
| Enthalpy of mixing; _printed: ΔmixH_ | -8.227 kJ/mol (basis unstated) ± 0.118 | 1014 | liquid; _alloy: Mg 0.4889, Pb 0.5111_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 14; `ORC-XJ5Z2S7VFT.209463` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -17.354 kJ/mol (basis unstated) | 1012 | liquid; _alloy: Mg 0.25, Pb 0.75_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 10; `ORC-7X6VMMQSK3.b4685c` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -16.764 kJ/mol (basis unstated) | 1012 | liquid; _alloy: Mg 0.139, Pb 0.861_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 9; `ORC-E7JBGPMQHL.e6c628` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -15.8 kJ/mol (basis unstated) | 1012 | liquid; _alloy: Mg 0.5, Pb 0.5_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 3; `ORC-GDBEZR33OB.553c2a` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -14.465 kJ/mol (basis unstated) | 1012 | liquid; _alloy: Mg 0.6117, Pb 0.3883_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 1; `ORC-VU3QP4GPMX.ccb85b` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -5.97 kJ/mol (basis unstated) | 1012 | liquid; _alloy: Mg 0.75, Pb 0.25_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 2; `ORC-WKFJYYJU7Q.59cd84` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -16.06 kJ/mol (basis unstated) | 1014 | liquid; _alloy: Mg 0.289, Pb 0.711_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 5; `ORC-33DIP27NAD.c2b049` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -12.845 kJ/mol (basis unstated) | 1014 | liquid; _alloy: Mg 0.5497, Pb 0.4503_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 15; `ORC-3XWCWW3WMQ.94f6c9` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -16.299 kJ/mol (basis unstated) | 1014 | liquid; _alloy: Mg 0.1765, Pb 0.8235_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 11; `ORC-5R73BHJRWY.fe9455` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -18.18 kJ/mol (basis unstated) | 1014 | liquid; _alloy: Mg 0.4066, Pb 0.5934_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 13; `ORC-73FBSRMRIP.e58f6e` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -13.273 kJ/mol (basis unstated) | 1014 | liquid; _alloy: Mg 0.5, Pb 0.5_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 8; `ORC-CUNDFVQZJ3.0df8d5` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -16.59 kJ/mol (basis unstated) | 1014 | liquid; _alloy: Mg 0.3047, Pb 0.6953_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 12; `ORC-KCJWD4UQMA.946ad2` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -16.74 kJ/mol (basis unstated) | 1014 | liquid; _alloy: Mg 0.1666, Pb 0.8334_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 4; `ORC-P7I44EJCPF.7fdcf2` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -10.765 kJ/mol (basis unstated) | 1014 | liquid; _alloy: Mg 0.5983, Pb 0.4017_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 16; `ORC-RNJLGLJCUB.1b2bbe` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -15.168 kJ/mol (basis unstated) | 1014 | liquid; _alloy: Mg 0.4479, Pb 0.5521_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 7; `ORC-SLGZC4OML5.538180` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -9.718 kJ/mol (basis unstated) | 1014 | liquid; _alloy: Mg 0.6402, Pb 0.3598_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 17; `ORC-VYTHIIEOPM.1012bb` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -17.077 kJ/mol (basis unstated) | 1014 | liquid; _alloy: Mg 0.3782, Pb 0.6218_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 6; `ORC-X5BGTTDP4L.d596fb` |  |
| Partial enthalpy; _printed: Δ¯HMg_ | -16.212 kJ/mol (basis unstated) | 1014 | liquid; _alloy: Mg 0.4889, Pb 0.5111_ | experimental | [2] Dębski 2021 | Table 2, p. 4, row 14; `ORC-XJ5Z2S7VFT.8825d4` |  |

### Crystal structure (15)

Table: Crystal structure, Mg–Pb system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a; _printed: Lattice constant a_ | 3.209 unknown | 0 | HCP_A3 (Mg); _alloy: Pb 0_ | DFT | [2] Dębski 2021; _cites Straumanis 1949_ [doi](https://doi.org/10.1063/1.1698520) | Table 3, p. 4, row 4; `ORC-AQVO6P7PTL.0e504f` |  |
| Lattice a; _printed: Lattice constant a_ | 3.203 unknown | 0 | HCP_A3 (Mg); _alloy: Pb 0_ | DFT | [2] Dębski 2021; _cites Wyckoff 1963_ | Table 3, p. 4, row 5; `ORC-SNDMUSDOAW.555948` |  |
| Lattice a; _printed: Lattice constant a_ | 3.206 unknown | 0 | HCP_A3 (Mg); _alloy: Pb 0_ | DFT | [2] Dębski 2021 | Table 3, p. 4, row 1; `ORC-TGN6DZ5YR2.cbdfe8` |  |
| Lattice a; _printed: Lattice constant a_ | 3.203 unknown | 0 | HCP_A3 (Mg); _alloy: Pb 0_ | DFT | [2] Dębski 2021; _cites Materials_ | Table 3, p. 4, row 2; `ORC-ZOIMCFNLRR.462d57` |  |
| Lattice a; _printed: Lattice constant a_ | 3.234 unknown | 0 | HCP_A3 (Mg); _alloy: Pb 0_ | DFT | [2] Dębski 2021; _cites Schimmel 2005_ [doi](https://doi.org/10.1021/ja051508a) | Table 3, p. 4, row 3; `ORC-ZPGQXFVIX5.e8e68f` |  |
| Lattice a; _printed: Lattice constant a_ | 4.833 unknown | 0 | Mg2Pb; _alloy: Pb 0.333333_ | DFT | [2] Dębski 2021; _cites Wyckoff 1963_ | Table 3, p. 4, row 16; `ORC-34CC5XCNAS` |  |
| Lattice a; _printed: Lattice constant a_ | 4.891 Å | 0 | Mg2Pb; _alloy: Pb 0.333333_ | DFT | [2] Dębski 2021; _cites Materials_ | Table 3, p. 4, row 12; `ORC-4AE7VZK4II` |  |
| Lattice a; _printed: Lattice constant a_ | 4.818 unknown | 0 | Mg2Pb; _alloy: Pb 0.333333_ | DFT | [2] Dębski 2021; _cites Fassler 1999_ | Table 3, p. 4, row 17; `ORC-E54UXRW2L2` |  |
| Lattice a; _printed: Lattice constant a_ | 4.881 unknown | 0 | Mg2Pb; _alloy: Pb 0.333333_ | DFT | [2] Dębski 2021 | Table 3, p. 4, row 6; `ORC-QCKLP7LRNS` |  |
| Lattice a; _printed: Lattice constant a_ | 4.851 Å | 0 | Mg2Pb; _alloy: Pb 0.333333_ | DFT | [2] Dębski 2021; _cites JARVIS_ | Table 3, p. 4, row 13; `ORC-VHQZIOYJHZ` |  |
| Lattice c; _printed: Lattice constant c_ | 5.21 unknown | 0 | HCP_A3 (Mg); _alloy: Pb 0_ | DFT | [2] Dębski 2021; _cites Straumanis 1949_ [doi](https://doi.org/10.1063/1.1698520) | Table 3, p. 4, row 4; `ORC-AQVO6P7PTL.0dcbb6` |  |
| Lattice c; _printed: Lattice constant c_ | 5.201 unknown | 0 | HCP_A3 (Mg); _alloy: Pb 0_ | DFT | [2] Dębski 2021; _cites Wyckoff 1963_ | Table 3, p. 4, row 5; `ORC-SNDMUSDOAW.be823b` |  |
| Lattice c; _printed: Lattice constant c_ | 5.133 unknown | 0 | HCP_A3 (Mg); _alloy: Pb 0_ | DFT | [2] Dębski 2021 | Table 3, p. 4, row 1; `ORC-TGN6DZ5YR2.cb0753` |  |
| Lattice c; _printed: Lattice constant c_ | 5.127 unknown | 0 | HCP_A3 (Mg); _alloy: Pb 0_ | DFT | [2] Dębski 2021; _cites Materials_ | Table 3, p. 4, row 2; `ORC-ZOIMCFNLRR.73b9c6` |  |
| Lattice c; _printed: Lattice constant c_ | 5.252 unknown | 0 | HCP_A3 (Mg); _alloy: Pb 0_ | DFT | [2] Dębski 2021; _cites Schimmel 2005_ [doi](https://doi.org/10.1021/ja051508a) | Table 3, p. 4, row 3; `ORC-ZPGQXFVIX5.561382` |  |

## Sources

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

1. F. Zhang, Y. Tang, B. Hu, S. Liu, Y. Du, Y. Zhang, Thermodynamic assessment of the Mg-Pb and Mg-Bi systems using substitutional solution and associate models for the liquid phase, J min metall B Metall 50, 115-126 (2014). [doi:10.2298/jmmb130824017z](https://doi.org/10.2298/jmmb130824017z)
2. A. Dębski, W. Gierlotka, S. Terlicka, W. Gąsior, On the Mg-Pb system. Calorimetric studies and thermodynamic calculations, Journal of Alloys and Compounds 861, 158396 (2021). [doi:10.1016/j.jallcom.2020.158396](https://doi.org/10.1016/j.jallcom.2020.158396)

## 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/).