Pb–Y phases

8 phases (tier A 6, tier C 1, liquid 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 · Pb–Y system page · Markdown · field reference

Phases of the Pb–Y system (8)
Phase	Structure	Basis	Stability (calculated)	TDB models
BCC_A2 phase:pb-y:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1736.2–2022.65 K, x(Y) 0.98871–1	1
FCC_A1 phase:pb-y:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–600.58 K, x(Y) 0–0	1
HCP_A3 phase:pb-y:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1751.15 K, x(Y) 0.9801–1	1
LIQUID phase:pb-y:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 600.58–2500 K, x(Y) 0–1	1
PB2Y_C49 phase:pb-y:pb2y-c49	ZrSi2 · C49 · oC12 · Cmcm (63)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1192.93 K, x(Y) 0.33333–0.33333	1
PB3Y_L12 phase:pb-y:pb3y-l12	AuCu3 · L1_2 · cP4 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1066.01 K, x(Y) 0.25–0.25	1
PB3Y5_D88 phase:pb-y:pb3y5-d88	Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1958 K, x(Y) 0.625–0.625	1
PB4Y5 phase:pb-y:pb4y5	Gd5Si4 · oP36 · Pnma (62)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1835.14 K, x(Y) 0.55556–0.55556	1

BCC_A2 (Pb–Y)

Id: phase:pb-y: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): 1736.2–2022.65 K, x(Y) 0.98871–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pb-y:bcc-a2
tdb: tdb:PbY-93Vas.tdb:BCC_A2

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

PbY-93Vas.tdb: BCC_A2, type code %B, sha256 56e02b1331b12a11…

41: PHASE BCC_A2 %B 2 1 3 !
42: CONST BCC_A2 : PB Y% : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02667801 V. Vassiliev, M. Gambino, J.P. Bros, G. Borzone, G. Cacciamani, R. Ferro, J. Phase Equilib., 14, 142-49(1993).
assessment that models this phase

FCC_A1 (Pb–Y)

Id: phase:pb-y: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): 300–600.58 K, x(Y) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pb-y:fcc-a1
tdb: tdb:PbY-93Vas.tdb:FCC_A1

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

PbY-93Vas.tdb: FCC_A1, type code %A, sha256 56e02b1331b12a11…

36: PHASE FCC_A1 %A 2 1 1 !
37: CONST FCC_A1 : PB% Y : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02667801 V. Vassiliev, M. Gambino, J.P. Bros, G. Borzone, G. Cacciamani, R. Ferro, J. Phase Equilib., 14, 142-49(1993).
assessment that models this phase

HCP_A3 (Pb–Y)

Id: phase:pb-y: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 1 of 1 calculated diagram(s): 300–1751.15 K, x(Y) 0.9801–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pb-y:hcp-a3
tdb: tdb:PbY-93Vas.tdb:HCP_A3

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

PbY-93Vas.tdb: HCP_A3, type code %A, sha256 56e02b1331b12a11…

46: PHASE HCP_A3 %A 2 1 0.5 !
47: CONST HCP_A3 : PB Y% : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02667801 V. Vassiliev, M. Gambino, J.P. Bros, G. Borzone, G. Cacciamani, R. Ferro, J. Phase Equilib., 14, 142-49(1993).
assessment that models this phase

LIQUID (Pb–Y)

Id: phase:pb-y:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 600.58–2500 K, x(Y) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pb-y:liquid
tdb: tdb:PbY-93Vas.tdb:LIQUID

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

PbY-93Vas.tdb: LIQUID, type code %, sha256 56e02b1331b12a11…

31: PHASE LIQUID:L % 1 1 !
32: CONST LIQUID:L : PB Y : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02667801 V. Vassiliev, M. Gambino, J.P. Bros, G. Borzone, G. Cacciamani, R. Ferro, J. Phase Equilib., 14, 142-49(1993).
assessment that models this phase

PB2Y_C49 (Pb–Y)

Id: phase:pb-y:pb2y-c49; status assigned
Structure: ZrSi2 · C49 · oC12 · Cmcm (63); type st:c49-zrsi2-oc12; tier A: standard phase name; confidence high
Stoichiometry: Pb 0.6667, Y 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1192.93 K, x(Y) 0.33333–0.33333
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pb-y:pb2y-c49
tdb: tdb:PbY-93Vas.tdb:PB2Y_C49

TDB models of PB2Y_C49 (1): PHASE and CONSTITUENT statements as written

PbY-93Vas.tdb: PB2Y_C49, type code %, sha256 56e02b1331b12a11…

56: PHASE PB2Y_C49 % 2 2 1 !
57: CONST PB2Y_C49 : PB : Y : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02667801 V. Vassiliev, M. Gambino, J.P. Bros, G. Borzone, G. Cacciamani, R. Ferro, J. Phase Equilib., 14, 142-49(1993).
assessment that models this phase

PB3Y_L12 (Pb–Y)

Id: phase:pb-y:pb3y-l12; status assigned
Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type st:l1-2-aucu3-cp4; tier A: standard phase name; confidence high
Stoichiometry: Pb 0.7500, Y 0.2500
Stability: stable in 1 of 1 calculated diagram(s): 300–1066.01 K, x(Y) 0.25–0.25
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pb-y:pb3y-l12
tdb: tdb:PbY-93Vas.tdb:PB3Y_L12

TDB models of PB3Y_L12 (1): PHASE and CONSTITUENT statements as written

PbY-93Vas.tdb: PB3Y_L12, type code %, sha256 56e02b1331b12a11…

51: PHASE PB3Y_L12 % 2 3 1 !
52: CONST PB3Y_L12 : PB : Y : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02667801 V. Vassiliev, M. Gambino, J.P. Bros, G. Borzone, G. Cacciamani, R. Ferro, J. Phase Equilib., 14, 142-49(1993).
assessment that models this phase

PB3Y5_D88 (Pb–Y)

Id: phase:pb-y:pb3y5-d88; status assigned
Structure: Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193); type st:d8-8-mn5si3-hp16; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaacppvo and oqmd-30931, space group 193
Stoichiometry: Pb 0.3750, Y 0.6250
Stability: stable in 1 of 1 calculated diagram(s): 300–1958 K, x(Y) 0.625–0.625
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:pb-y:pb3y5-d88
mp: mp:mp-aaacppvo
oqmd: oqmd:oqmd-30931
tdb: tdb:PbY-93Vas.tdb:PB3Y5_D88

TDB models of PB3Y5_D88 (1): PHASE and CONSTITUENT statements as written

PbY-93Vas.tdb: PB3Y5_D88, type code %, sha256 56e02b1331b12a11…

66: PHASE PB3Y5_D88 % 2 3 5 !
67: CONST PB3Y5_D88 : PB : Y : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02667801 V. Vassiliev, M. Gambino, J.P. Bros, G. Borzone, G. Cacciamani, R. Ferro, J. Phase Equilib., 14, 142-49(1993).
assessment that models this phase

PB4Y5 (Pb–Y)

Id: phase:pb-y:pb4y5; status assigned
Structure: Gd5Si4 · oP36 · Pnma (62); type st:gd5si4-op36; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) doi:10.1016/j.calphad.2025.102833
Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Pb 0.4444, Y 0.5556
Stability: stable in 1 of 1 calculated diagram(s): 300–1835.14 K, x(Y) 0.55556–0.55556
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pb-y:pb4y5
tdb: tdb:PbY-93Vas.tdb:PB4Y5

TDB models of PB4Y5 (1): PHASE and CONSTITUENT statements as written

PbY-93Vas.tdb: PB4Y5, type code %, sha256 56e02b1331b12a11…

61: PHASE PB4Y5 % 2 4 5 !
62: CONST PB4Y5 : PB : Y : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02667801 V. Vassiliev, M. Gambino, J.P. Bros, G. Borzone, G. Cacciamani, R. Ferro, J. Phase Equilib., 14, 142-49(1993).
assessment that models 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}
}