Mg–Pb phases

5 phases (tier A 4, liquid 1); 4 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: interactive registry · full JSON · Mg–Pb system page · Markdown · field reference

Phases of the Mg–Pb system (5)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:mg-pb:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 3 calculated diagram(s)	0	3
FCC_A1 phase:mg-pb:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–601.06 K, x(Pb) 0.93764–1	7	3
HCP_A3 phase:mg-pb:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–927 K, x(Pb) 0–0.0871	18	3
LIQUID phase:mg-pb:liquid	liquid	liquid	stable in 3 of 3 calculated diagram(s): 517.29–2500 K, x(Pb) 0–1	73	3
MG2PB_C1 phase:mg-pb:mg2pb-c1	CaF2 · C1 · cF12 · Fm-3m (225)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–823.81 K, x(Pb) 0.33333–0.33333	39	3

BCC_A2 (Mg–Pb)

Id: phase:mg-pb:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stability: not stable in 3 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mg-pb:bcc-a2
tdb: tdb:MgPb-14Zha-ass.tdb:BCC_A2, tdb:MgPb-14Zha-sub.tdb:BCC_A2, tdb:MgPb-21Deb.tdb:BCC_A2

TDB models of BCC_A2 (3): PHASE and CONSTITUENT statements as written

MgPb-14Zha-ass.tdb: BCC_A2, type code %B, sha256 85fd9842fb3b047b…

40: PHASE BCC_A2 %B 2 1 3 !
41: CONST BCC_A2 : MG PB : VA : !

MgPb-14Zha-sub.tdb: BCC_A2, type code %B, sha256 715ddff6aaa4430b…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : MG PB : VA : !

MgPb-21Deb.tdb: BCC_A2, type code %B, sha256 c150e3ea46f0693a…

42: PHASE BCC_A2 %B 2 1 3 !
43: CONST BCC_A2 : MG PB : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2020.158396 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).
assessment that models this phase
doi:10.2298/JMMB130824017Z F. Zhang, Y. Tang, B. Hu, S. Liu, Y. Du, Y. Zhang, J. Mining Metall. B, 50, 115-26(2014).
assessment that models this phase

FCC_A1 (Mg–Pb)

Id: phase:mg-pb:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 300–601.06 K, x(Pb) 0.93764–1
Literature: 7 values (7 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:mg-pb:fcc-a1
paper: paper:10.2298/jmmb130824017z:(Pb)
tdb: tdb:MgPb-14Zha-ass.tdb:FCC_A1, tdb:MgPb-14Zha-sub.tdb:FCC_A1, tdb:MgPb-21Deb.tdb:FCC_A1

TDB models of FCC_A1 (3): PHASE and CONSTITUENT statements as written

MgPb-14Zha-ass.tdb: FCC_A1, type code %A, sha256 85fd9842fb3b047b…

35: PHASE FCC_A1 %A 2 1 1 !
36: CONST FCC_A1 : MG PB% : VA : !

MgPb-14Zha-sub.tdb: FCC_A1, type code %A, sha256 715ddff6aaa4430b…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : MG PB% : VA : !

MgPb-21Deb.tdb: FCC_A1, type code %A, sha256 c150e3ea46f0693a…

37: PHASE FCC_A1 %A 2 1 1 !
38: CONST FCC_A1 : MG PB% : VA : !

Example references (2 of 2; assessments first):

doi:10.2298/JMMB130824017Z F. Zhang, Y. Tang, B. Hu, S. Liu, Y. Du, Y. Zhang, J. Mining Metall. B, 50, 115-26(2014).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2020.158396 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).
assessment that models this phase

HCP_A3 (Mg–Pb)

Id: phase:mg-pb:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 300–927 K, x(Pb) 0–0.0871
Literature: 18 values (18 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:mg-pb:hcp-a3
paper: paper:10.1016/j.jallcom.2020.158396:HCP_A3 (Mg), paper:10.1016/j.jallcom.2020.158396:HCP_A3(Mg), paper:10.2298/jmmb130824017z:(Mg)
tdb: tdb:MgPb-14Zha-ass.tdb:HCP_A3, tdb:MgPb-14Zha-sub.tdb:HCP_A3, tdb:MgPb-21Deb.tdb:HCP_A3

TDB models of HCP_A3 (3): PHASE and CONSTITUENT statements as written

MgPb-14Zha-ass.tdb: HCP_A3, type code %A, sha256 85fd9842fb3b047b…

45: PHASE HCP_A3 %A 2 1 0.5 !
46: CONST HCP_A3 : MG% PB : VA : !

MgPb-14Zha-sub.tdb: HCP_A3, type code %A, sha256 715ddff6aaa4430b…

41: PHASE HCP_A3 %A 2 1 0.5 !
42: CONST HCP_A3 : MG% PB : VA : !

MgPb-21Deb.tdb: HCP_A3, type code %A, sha256 c150e3ea46f0693a…

47: PHASE HCP_A3 %A 2 1 0.5 !
48: CONST HCP_A3 : MG% PB : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2020.158396 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).
assessment that models this phase; reports values for this phase
doi:10.2298/JMMB130824017Z F. Zhang, Y. Tang, B. Hu, S. Liu, Y. Du, Y. Zhang, J. Mining Metall. B, 50, 115-26(2014).
assessment that models this phase; reports values for this phase
doi:10.1002/zaac.19050440107 G. Grube, Metallographische Mitteilungen aus dem Institut für anorganische Chemie der Universität Göttingen. V. Über Magnesium‐Bleilegierungen, Z. Anorg. Chem. 44, 117-130 (1905).
cited as the source of values for this phase
doi:10.1007/bf02871188 A.A. Nayeb-Hashemi, J.B. Clark, The Mg-Pb (magnesium-lead) system, Bull. Alloy Phase Diag. 6 (1985) 56–66.
cited as the source of values for this phase

LIQUID (Mg–Pb)

Id: phase:mg-pb:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 517.29–2500 K, x(Pb) 0–1
Literature: 73 values (73 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:mg-pb:liquid
paper: paper:10.1016/j.jallcom.2020.158396:L, paper:10.1016/j.jallcom.2020.158396:liquid, paper:10.2298/jmmb130824017z:Liquid
tdb: tdb:MgPb-14Zha-ass.tdb:LIQUID, tdb:MgPb-14Zha-sub.tdb:LIQUID, tdb:MgPb-21Deb.tdb:LIQUID

TDB models of LIQUID (3): PHASE and CONSTITUENT statements as written

MgPb-14Zha-ass.tdb: LIQUID, type code %, sha256 85fd9842fb3b047b…

30: PHASE LIQUID:L % 1 1 !
31: CONST LIQUID:L : MG MG2PB PB : !

MgPb-14Zha-sub.tdb: LIQUID, type code %, sha256 715ddff6aaa4430b…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : MG PB : !

MgPb-21Deb.tdb: LIQUID, type code %, sha256 c150e3ea46f0693a…

32: PHASE LIQUID:L % 1 1 !
33: CONST LIQUID:L : MG MG2PB PB : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2020.158396 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).
assessment that models this phase; reports values for this phase
doi:10.2298/JMMB130824017Z F. Zhang, Y. Tang, B. Hu, S. Liu, Y. Du, Y. Zhang, J. Mining Metall. B, 50, 115-26(2014).
assessment that models this phase; reports values for this phase
doi:10.1002/zaac.19050440107 G. Grube, Metallographische Mitteilungen aus dem Institut für anorganische Chemie der Universität Göttingen. V. Über Magnesium‐Bleilegierungen, Z. Anorg. Chem. 44, 117-130 (1905).
cited as the source of values for this phase
doi:10.1007/bf02871188 A.A. Nayeb-Hashemi, J.B. Clark, The Mg-Pb (magnesium-lead) system, Bull. Alloy Phase Diag. 6 (1985) 56–66.
cited as the source of values for this phase

MG2PB_C1 (Mg–Pb)

Id: phase:mg-pb:mg2pb-c1; status assigned
Structure: CaF2 · C1 · cF12 · Fm-3m (225); type st:c1-caf2-cf12; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaberc and oqmd-17637, space group 225
Stoichiometry: Mg 0.6667, Pb 0.3333
Stability: stable in 3 of 3 calculated diagram(s): 300–823.81 K, x(Pb) 0.33333–0.33333
Literature: 39 values (39 accepted) from 2 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:mg-pb:mg2pb-c1
mp: mp:mp-aaaaberc
oqmd: oqmd:oqmd-17637
paper: paper:10.1016/j.jallcom.2020.158396:Mg2Pb, paper:10.2298/jmmb130824017z:Mg2Pb
tdb: tdb:MgPb-14Zha-ass.tdb:MG2PB_C1, tdb:MgPb-14Zha-sub.tdb:MG2PB_C1, tdb:MgPb-21Deb.tdb:MG2PB_C1

TDB models of MG2PB_C1 (3): PHASE and CONSTITUENT statements as written

MgPb-14Zha-ass.tdb: MG2PB_C1, type code %, sha256 85fd9842fb3b047b…

50: PHASE MG2PB_C1 % 2 2 1 !
51: CONST MG2PB_C1 : MG : PB : !

MgPb-14Zha-sub.tdb: MG2PB_C1, type code %, sha256 715ddff6aaa4430b…

46: PHASE MG2PB_C1 % 2 2 1 !
47: CONST MG2PB_C1 : MG : PB : !

MgPb-21Deb.tdb: MG2PB_C1, type code %, sha256 c150e3ea46f0693a…

52: PHASE MG2PB_C1 % 2 2 1 !
53: CONST MG2PB_C1 : MG : PB : !

Example references (4 of 4; assessments first):

doi:10.2298/JMMB130824017Z F. Zhang, Y. Tang, B. Hu, S. Liu, Y. Du, Y. Zhang, J. Mining Metall. B, 50, 115-26(2014).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2020.158396 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).
assessment that models this phase; reports values for this phase
doi:10.1002/zaac.19050440107 G. Grube, Metallographische Mitteilungen aus dem Institut für anorganische Chemie der Universität Göttingen. V. Über Magnesium‐Bleilegierungen, Z. Anorg. Chem. 44, 117-130 (1905).
cited as the source of values for this phase
doi:10.1007/bf02871188 A.A. Nayeb-Hashemi, J.B. Clark, The Mg-Pb (magnesium-lead) system, Bull. Alloy Phase Diag. 6 (1985) 56–66.
cited as the source of values for this phase

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735970
R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23736065

Also cite 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); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work). 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.

@misc{orchid_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  note      = {Version 1, machine-extracted}
}

@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}
}