Bi–Zn phases

5 phases (tier A 4, liquid 1); 3 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 · Bi–Zn system page · Markdown · field reference

Phases of the Bi–Zn system (5)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
RHOMBOHEDRAL_A7 phase:bi-zn:a7-rhombohedral	alpha-As · A7 · hR2 · R-3m (166)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–544.55 K, x(Zn) 0–0.01636	5	5
BCC_A2 phase:bi-zn:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 4 calculated diagram(s)	0	4
FCC_A1 phase:bi-zn:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 4 calculated diagram(s)	0	4
HCP_A3 phase:bi-zn:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–2498.93 K, x(Zn) 0.99584–1	8	5
LIQUID phase:bi-zn:liquid	liquid	liquid	stable in 5 of 5 calculated diagram(s): 520.1–2500 K, x(Zn) 0–1	22	5

RHOMBOHEDRAL_A7 (Bi–Zn)

Id: phase:bi-zn:a7-rhombohedral; status assigned
Structure: alpha-As · A7 · hR2 · R-3m (166); type st:a7-alpha-as-hr2; tier A: standard phase name; confidence high
Stability: stable in 5 of 5 calculated diagram(s): 300–544.55 K, x(Zn) 0–0.01636
Literature: 5 values (5 accepted) from 2 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:bi-zn:a7-rhombohedral, corpus:phase:bi-zn:rhombohedral-a7
paper: paper:10.1016/s0364-5916(00)00011-0:Rhombohedral solution, paper:10.1088/0965-0393/13/3/006:Bi
tdb: tdb:BiZn-00Mal-LB.tdb:RHOMBOHEDRAL_A7, tdb:BiZn-03Kim.tdb:RHOMBOHEDRAL_A7, tdb:BiZn-05Dja.tdb:RHOMBOHEDRAL_A7, tdb:BiZn-07Viz.tdb:RHOMBOHEDRAL_A7, tdb:BiZn-85Gir.tdb:RHOMBOHEDRAL_A7

TDB models of RHOMBOHEDRAL_A7 (5): PHASE and CONSTITUENT statements as written

BiZn-00Mal-LB.tdb: RHOMBOHEDRAL_A7, type code %, sha256 dc7817b37fd01700…

41: PHASE RHOMBOHEDRAL_A7 % 1 1 !
42: CONST RHOMBOHEDRAL_A7 : BI% ZN : !

BiZn-03Kim.tdb: RHOMBOHEDRAL_A7, type code %, sha256 33acdc44f5718ce5…

44: PHASE RHOMBOHEDRAL_A7 % 1 1 !
45: CONST RHOMBOHEDRAL_A7 : BI% ZN : !

BiZn-05Dja.tdb: RHOMBOHEDRAL_A7, type code %, sha256 f5ecc95e0f1b3aaf…

36: PHASE RHOMBOHEDRAL_A7 % 1 1 !
37: CONST RHOMBOHEDRAL_A7 : BI : !

BiZn-07Viz.tdb: RHOMBOHEDRAL_A7, type code %, sha256 0d71ac7c1215c028…

43: PHASE RHOMBOHEDRAL_A7 % 1 1 !
44: CONST RHOMBOHEDRAL_A7 : BI% ZN : !

BiZn-85Gir.tdb: RHOMBOHEDRAL_A7, type code %, sha256 303007160c50d88d…

41: PHASE RHOMBOHEDRAL_A7 % 1 1 !
42: CONST RHOMBOHEDRAL_A7 : BI : !

Example references (5 of 5; assessments first):

doi:10.1088/0965-0393/13/3/006 Y Djaballah, L Bennour, F Bouharkat, A Belgacem-Bouzida, Thermodynamic assessment of the binary system (Bi–Zn), Modelling Simul. Mater. Sci. Eng. 13, 361-369 (2005).
assessment that models this phase; reports values for this phase
doi:10.1016/S0364-5916(00)00011-0 D.V. Malakhov, Calphad, 24, 1-14(2000).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2007.05.002 J. Vizdal, M.H. Braga, A. Kroupa, K.W. Richter, D. Soares, L.F. Malheiros, J. Ferreira, Calphad, 31, 438-48(2007).
assessment that models this phase
doi:10.1515/ijmr-2003-0070 S.S. Kim, T.H. Sanders, Jr., Z. Metallkd., 94, 390-95(2003).
assessment that models this phase
doi:10.1016/0925-8388(95)02095-0 F. Bouharkat, J.J. Counioux, J.R. Vignalou, J. Said, Miscibility study in the bismuth-zinc system extension to the isotherms 425 and 500°C of the ternary system BiSbZn, Journal of Alloys and Compounds 238, 149-154 (1996).
cited as the source of values for this phase

BCC_A2 (Bi–Zn)

Id: phase:bi-zn: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 4 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:bi-zn:bcc-a2
tdb: tdb:BiZn-00Mal-LB.tdb:BCC_A2, tdb:BiZn-03Kim.tdb:BCC_A2, tdb:BiZn-07Viz.tdb:BCC_A2, tdb:BiZn-85Gir.tdb:BCC_A2

TDB models of BCC_A2 (4): PHASE and CONSTITUENT statements as written

BiZn-00Mal-LB.tdb: BCC_A2, type code %B, sha256 dc7817b37fd01700…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : BI ZN : VA : !

BiZn-03Kim.tdb: BCC_A2, type code %B, sha256 33acdc44f5718ce5…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : BI ZN : VA : !

BiZn-07Viz.tdb: BCC_A2, type code %B, sha256 0d71ac7c1215c028…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : BI ZN : VA : !

BiZn-85Gir.tdb: BCC_A2, type code %B, sha256 303007160c50d88d…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : BI ZN : VA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2007.05.002 J. Vizdal, M.H. Braga, A. Kroupa, K.W. Richter, D. Soares, L.F. Malheiros, J. Ferreira, Calphad, 31, 438-48(2007).
assessment that models this phase
doi:10.1016/S0364-5916(00)00011-0 D.V. Malakhov, Calphad, 24, 1-14(2000).
assessment that models this phase
doi:10.1515/ijmr-2003-0070 S.S. Kim, T.H. Sanders, Jr., Z. Metallkd., 94, 390-95(2003).
assessment that models this phase

FCC_A1 (Bi–Zn)

Id: phase:bi-zn:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stability: not stable in 4 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:bi-zn:fcc-a1
tdb: tdb:BiZn-00Mal-LB.tdb:FCC_A1, tdb:BiZn-03Kim.tdb:FCC_A1, tdb:BiZn-07Viz.tdb:FCC_A1, tdb:BiZn-85Gir.tdb:FCC_A1

TDB models of FCC_A1 (4): PHASE and CONSTITUENT statements as written

BiZn-00Mal-LB.tdb: FCC_A1, type code %A, sha256 dc7817b37fd01700…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : BI ZN : VA : !

BiZn-03Kim.tdb: FCC_A1, type code %A, sha256 33acdc44f5718ce5…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : BI ZN : VA : !

BiZn-07Viz.tdb: FCC_A1, type code %A, sha256 0d71ac7c1215c028…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : BI ZN : VA : !

BiZn-85Gir.tdb: FCC_A1, type code %A, sha256 303007160c50d88d…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : BI ZN : VA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2007.05.002 J. Vizdal, M.H. Braga, A. Kroupa, K.W. Richter, D. Soares, L.F. Malheiros, J. Ferreira, Calphad, 31, 438-48(2007).
assessment that models this phase
doi:10.1016/S0364-5916(00)00011-0 D.V. Malakhov, Calphad, 24, 1-14(2000).
assessment that models this phase
doi:10.1515/ijmr-2003-0070 S.S. Kim, T.H. Sanders, Jr., Z. Metallkd., 94, 390-95(2003).
assessment that models this phase

HCP_A3 (Bi–Zn)

Id: phase:bi-zn: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 5 of 5 calculated diagram(s): 300–2498.93 K, x(Zn) 0.99584–1
Literature: 8 values (7 accepted) from 2 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:bi-zn:hcp-a3
paper: paper:10.1016/s0364-5916(00)00011-0:HCP solution, paper:10.1016/s0364-5916(00)00011-0:Hexagonal solution, paper:10.1088/0965-0393/13/3/006:Zn
tdb: tdb:BiZn-00Mal-LB.tdb:HCP_A3, tdb:BiZn-03Kim.tdb:HCP_A3, tdb:BiZn-05Dja.tdb:HCP_A3, tdb:BiZn-07Viz.tdb:HCP_A3, tdb:BiZn-85Gir.tdb:HCP_A3

TDB models of HCP_A3 (5): PHASE and CONSTITUENT statements as written

BiZn-00Mal-LB.tdb: HCP_A3, type code %A, sha256 dc7817b37fd01700…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : BI ZN% : VA: !

BiZn-03Kim.tdb: HCP_A3, type code %A, sha256 33acdc44f5718ce5…

39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : BI ZN% : VA: !

BiZn-05Dja.tdb: HCP_A3, type code %A, sha256 f5ecc95e0f1b3aaf…

31: PHASE HCP_A3 %A 2 1 0.5 !
32: CONST HCP_A3 : ZN : VA: !

BiZn-07Viz.tdb: HCP_A3, type code %A, sha256 0d71ac7c1215c028…

38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : BI ZN% : VA: !

BiZn-85Gir.tdb: HCP_A3, type code %A, sha256 303007160c50d88d…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : BI ZN% : VA: !

Example references (5 of 5; assessments first):

doi:10.1088/0965-0393/13/3/006 Y Djaballah, L Bennour, F Bouharkat, A Belgacem-Bouzida, Thermodynamic assessment of the binary system (Bi–Zn), Modelling Simul. Mater. Sci. Eng. 13, 361-369 (2005).
assessment that models this phase; reports values for this phase
doi:10.1016/S0364-5916(00)00011-0 D.V. Malakhov, Calphad, 24, 1-14(2000).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2007.05.002 J. Vizdal, M.H. Braga, A. Kroupa, K.W. Richter, D. Soares, L.F. Malheiros, J. Ferreira, Calphad, 31, 438-48(2007).
assessment that models this phase
doi:10.1515/ijmr-2003-0070 S.S. Kim, T.H. Sanders, Jr., Z. Metallkd., 94, 390-95(2003).
assessment that models this phase
doi:10.1016/0925-8388(95)02095-0 F. Bouharkat, J.J. Counioux, J.R. Vignalou, J. Said, Miscibility study in the bismuth-zinc system extension to the isotherms 425 and 500°C of the ternary system BiSbZn, Journal of Alloys and Compounds 238, 149-154 (1996).
cited as the source of values for this phase

LIQUID (Bi–Zn)

Id: phase:bi-zn:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 5 of 5 calculated diagram(s): 520.1–2500 K, x(Zn) 0–1
Literature: 22 values (22 accepted) from 2 papers
Interactive: phase registry entry

Names (11): corpus: corpus:phase:bi-zn:liquid, corpus:phase:bi-zn:liquid-2
paper: paper:10.1016/s0364-5916(00)00011-0:Liquid, paper:10.1088/0965-0393/13/3/006:1 liq, paper:10.1088/0965-0393/13/3/006:liq 1, paper:10.1088/0965-0393/13/3/006:liq 2
tdb: tdb:BiZn-00Mal-LB.tdb:LIQUID, tdb:BiZn-03Kim.tdb:LIQUID, tdb:BiZn-05Dja.tdb:LIQUID, tdb:BiZn-07Viz.tdb:LIQUID, tdb:BiZn-85Gir.tdb:LIQUID

TDB models of LIQUID (5): PHASE and CONSTITUENT statements as written

BiZn-00Mal-LB.tdb: LIQUID, type code %, sha256 dc7817b37fd01700…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : BI ZN : !

BiZn-03Kim.tdb: LIQUID, type code %, sha256 33acdc44f5718ce5…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : BI ZN : !

BiZn-05Dja.tdb: LIQUID, type code %, sha256 f5ecc95e0f1b3aaf…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : BI ZN : !

BiZn-07Viz.tdb: LIQUID, type code %, sha256 0d71ac7c1215c028…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : BI ZN : !

BiZn-85Gir.tdb: LIQUID, type code %, sha256 303007160c50d88d…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : BI ZN : !

Example references (10 of 10; assessments first):

doi:10.1088/0965-0393/13/3/006 Y Djaballah, L Bennour, F Bouharkat, A Belgacem-Bouzida, Thermodynamic assessment of the binary system (Bi–Zn), Modelling Simul. Mater. Sci. Eng. 13, 361-369 (2005).
assessment that models this phase; reports values for this phase
doi:10.1016/S0364-5916(00)00011-0 D.V. Malakhov, Calphad, 24, 1-14(2000).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2007.05.002 J. Vizdal, M.H. Braga, A. Kroupa, K.W. Richter, D. Soares, L.F. Malheiros, J. Ferreira, Calphad, 31, 438-48(2007).
assessment that models this phase
doi:10.1515/ijmr-2003-0070 S.S. Kim, T.H. Sanders, Jr., Z. Metallkd., 94, 390-95(2003).
assessment that models this phase
doi:10.1016/0925-8388(95)02095-0 F. Bouharkat, J.J. Counioux, J.R. Vignalou, J. Said, Miscibility study in the bismuth-zinc system extension to the isotherms 425 and 500°C of the ternary system BiSbZn, Journal of Alloys and Compounds 238, 149-154 (1996).
cited as the source of values for this phase
doi:10.3139/146.030390 Sung S. Kim, Thomas H. Sanders, Thermodynamic Assessment of the Miscibility Gaps and the Metastable Liquidi in the Zn–Bi, Zn–Pb, and Zn–Tl Systems, MEKU 94, 390-395 (2003).
cited as the source of values for this phase
doi:10.1143/jpsj.62.2388 Satoshi Kanai, Yoshimi Tsuchiya, Sound Velocity in the Liquid Bismuth-Zinc System, J. Phys. Soc. Jpn. 62, 2388-2394 (1993).
cited as the source of values for this phase
doi:10.1515/ijmr-1955-461101 Woligang Seith, Heinz Johnen, Jürgen Wagner, Zur Kenntnis von Mischungslücken im flüssigen Zustand bei metallischen Zwei- und Dreistoffsystemen, International Journal of Materials Research 46, 773-779 (1955).
cited as the source of values for this phase
doi:10.1515/ijmr-1992-830710 Ram Nadan Singh, Ferdinand Sommer, A Simple Model for Demixing Binary Liquid Alloys, International Journal of Materials Research 83, 533-540 (1992).
cited as the source of values for this phase
doi:10.2320/matertrans1960.21.226 Kazuhisa Okajima, Hiroshi Sakao, Equilibria between the Two Immiscible Liquid Phases in the Zinc-Bismuth System, Trans. JIM 21, 226-236 (1980).
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}
}