Eu–Pb phases

9 phases (tier A 7, liquid 1, needs_review 1); 8 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 · Eu–Pb system page · Markdown · field reference

Phases of the Eu–Pb system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:eu-pb:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1130.5 K, x(Pb) 0–4e-05	2	1
EU2PB_C37 phase:eu-pb:eu2pb-c37	Co2Si · C37 · oP12 · Pnma (62)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1520.3 K, x(Pb) 0.31718–0.33333	6	1
EU5PB3_D8M phase:eu-pb:eu5pb3-d8m	W5Si3 · D8_m · tI32 · I4/mcm (140)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1412.55 K, x(Pb) 0.375–0.375	6	1
EUPB_HT phase:eu-pb:eupb		needs_review	stable in 1 of 1 calculated diagram(s): 1135.84–1342.17 K, x(Pb) 0.48768–0.4997	8	1
EUPB_L10 phase:eu-pb:eupb-l10	AuCu · L1_0 · tP4 · P4/mmm (123)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1147.17 K, x(Pb) 0.49394–0.5	6	1
EUPB3_L12 phase:eu-pb:eupb3-l12	AuCu3 · L1_2 · cP4 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1065.75 K, x(Pb) 0.75–0.75	4	1
FCC_A1 phase:eu-pb:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2499.36 K, x(Pb) 1–1	0	1
HCP_A3 phase:eu-pb:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
LIQUID phase:eu-pb:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 598.92–2500 K, x(Pb) 0–1	16	1

BCC_A2 (Eu–Pb)

Id: phase:eu-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: stable in 1 of 1 calculated diagram(s): 300–1130.5 K, x(Pb) 0–4e-05
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:eu-pb:bcc-a2
paper: paper:10.1016/j.calphad.2013.01.007:(Eu)
tdb: tdb:EuPb-13Wan.tdb:BCC_A2

TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written

EuPb-13Wan.tdb: BCC_A2, type code %B, sha256 f6d7b9cda66ca056…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : EU% PB : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.01.007 D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013).
assessment that models this phase; reports values for this phase

EU2PB_C37 (Eu–Pb)

Id: phase:eu-pb:eu2pb-c37; status assigned
Structure: Co2Si · C37 · oP12 · Pnma (62); type st:c37-co2si-op12; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–1520.3 K, x(Pb) 0.31718–0.33333
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:eu-pb:eu2pb-c37
paper: paper:10.1016/j.calphad.2013.01.007:Eu2Pb
tdb: tdb:EuPb-13Wan.tdb:EU2PB_C37

TDB models of EU2PB_C37 (1): PHASE and CONSTITUENT statements as written

EuPb-13Wan.tdb: EU2PB_C37, type code %, sha256 f6d7b9cda66ca056…

40: PHASE EU2PB_C37 % 2 2 1 !
41: CONST EU2PB_C37 : EU : EU PB% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.01.007 D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013).
assessment that models this phase; reports values for this phase

EU5PB3_D8M (Eu–Pb)

Id: phase:eu-pb:eu5pb3-d8m; status assigned
Structure: W5Si3 · D8_m · tI32 · I4/mcm (140); type st:d8-m-w5si3-ti32; tier A: standard phase name; confidence high
Stoichiometry: Eu 0.6250, Pb 0.3750
Stability: stable in 1 of 1 calculated diagram(s): 300–1412.55 K, x(Pb) 0.375–0.375
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:eu-pb:eu5pb3-d8m
paper: paper:10.1016/j.calphad.2013.01.007:Eu5Pb3
tdb: tdb:EuPb-13Wan.tdb:EU5PB3_D8M

TDB models of EU5PB3_D8M (1): PHASE and CONSTITUENT statements as written

EuPb-13Wan.tdb: EU5PB3_D8M, type code %, sha256 f6d7b9cda66ca056…

45: PHASE EU5PB3_D8M % 2 5 3 !
46: CONST EU5PB3_D8M : EU : PB : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.01.007 D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013).
assessment that models this phase; reports values for this phase

EUPB_HT (Eu–Pb)

Id: phase:eu-pb:eupb; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model; sgte_mmc2_row_incomplete
Candidate (literature_printed): (EuPb) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (EuPb) — Hallstedt 2025 mmc2 row for EUPB_HT: EuPb (high T)
Stability: stable in 1 of 1 calculated diagram(s): 1135.84–1342.17 K, x(Pb) 0.48768–0.4997
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:eu-pb:eupb, corpus:phase:eu-pb:eupb-ht
paper: paper:10.1016/j.calphad.2013.01.007:βEuPb
tdb: tdb:EuPb-13Wan.tdb:EUPB_HT

TDB models of EUPB_HT (1): PHASE and CONSTITUENT statements as written

EuPb-13Wan.tdb: EUPB_HT, type code %, sha256 f6d7b9cda66ca056…

55: PHASE EUPB_HT % 2 1 1 !
56: CONST EUPB_HT : EU : EU PB% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.01.007 D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013).
assessment that models this phase; reports values for this phase

EUPB_L10 (Eu–Pb)

Id: phase:eu-pb:eupb-l10; status assigned
Structure: AuCu · L1_0 · tP4 · P4/mmm (123); type st:l1-0-aucu-tp4; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–1147.17 K, x(Pb) 0.49394–0.5
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:eu-pb:eupb-l10
paper: paper:10.1016/j.calphad.2013.01.007:αEuPb
tdb: tdb:EuPb-13Wan.tdb:EUPB_L10

TDB models of EUPB_L10 (1): PHASE and CONSTITUENT statements as written

EuPb-13Wan.tdb: EUPB_L10, type code %, sha256 f6d7b9cda66ca056…

50: PHASE EUPB_L10 % 2 1 1 !
51: CONST EUPB_L10 : EU : EU PB% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.01.007 D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013).
assessment that models this phase; reports values for this phase

EUPB3_L12 (Eu–Pb)

Id: phase:eu-pb:eupb3-l12; status assigned
Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type st:l1-2-aucu3-cp4; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaabebd and oqmd-30123, space group 221
Stoichiometry: Eu 0.2500, Pb 0.7500
Stability: stable in 1 of 1 calculated diagram(s): 300–1065.75 K, x(Pb) 0.75–0.75
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:eu-pb:eupb3-l12
mp: mp:mp-aaaabebd
oqmd: oqmd:oqmd-30123
paper: paper:10.1016/j.calphad.2013.01.007:EuPb3
tdb: tdb:EuPb-13Wan.tdb:EUPB3_L12

TDB models of EUPB3_L12 (1): PHASE and CONSTITUENT statements as written

EuPb-13Wan.tdb: EUPB3_L12, type code %, sha256 f6d7b9cda66ca056…

60: PHASE EUPB3_L12 % 2 1 3 !
61: CONST EUPB3_L12 : EU : PB : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.01.007 D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013).
assessment that models this phase; reports values for this phase

FCC_A1 (Eu–Pb)

Id: phase:eu-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 1 of 1 calculated diagram(s): 300–2499.36 K, x(Pb) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:eu-pb:fcc-a1
tdb: tdb:EuPb-13Wan.tdb:FCC_A1

TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written

EuPb-13Wan.tdb: FCC_A1, type code %A, sha256 f6d7b9cda66ca056…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : EU PB% : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.01.007 D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013).
assessment that models this phase

HCP_A3 (Eu–Pb)

Id: phase:eu-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
Stoichiometry: Pb 1.0000
Stability: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:eu-pb:hcp-a3
tdb: tdb:EuPb-13Wan.tdb:HCP_A3

TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written

EuPb-13Wan.tdb: HCP_A3, type code %A, sha256 f6d7b9cda66ca056…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : PB : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.01.007 D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013).
assessment that models this phase

LIQUID (Eu–Pb)

Id: phase:eu-pb:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 598.92–2500 K, x(Pb) 0–1
Literature: 16 values (16 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:eu-pb:liquid
paper: paper:10.1016/j.calphad.2013.01.007:L
tdb: tdb:EuPb-13Wan.tdb:LIQUID

TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written

EuPb-13Wan.tdb: LIQUID, type code %, sha256 f6d7b9cda66ca056…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : EU PB : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2013.01.007 D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013).
assessment that models this phase; reports 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}
}