Al–Zn phases

4 phases (tier A 3, 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 · Al–Zn system page · Markdown · field reference

Phases of the Al–Zn system (4)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:al-zn:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 4 calculated diagram(s): 2473.75–2500 K, x(Zn) 0–0.01517	0	4
FCC_A1 phase:al-zn:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–933.47 K, x(Zn) 0–0.74215	46	5
HCP_A3 phase:al-zn:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–1467.6 K, x(Zn) 0.94777–1	39	5
LIQUID phase:al-zn:liquid	liquid	liquid	stable in 5 of 5 calculated diagram(s): 653.07–2500 K, x(Zn) 0–1	17	5

BCC_A2 (Al–Zn)

Id: phase:al-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: stable in 1 of 4 calculated diagram(s): 2473.75–2500 K, x(Zn) 0–0.01517
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:al-zn:bcc-a2
tdb: tdb:AlZn-00Mat.tdb:BCC_A2, tdb:AlZn-86Mey.tdb:BCC_A2, tdb:AlZn-93Che.tdb:BCC_A2, tdb:AlZn-93Mey-LB.tdb:BCC_A2

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

AlZn-00Mat.tdb: BCC_A2, type code %B, sha256 c396f22f72e3f305…

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

AlZn-86Mey.tdb: BCC_A2, type code %B, sha256 e4f6db4a389e402f…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : AL ZN : VA : !

AlZn-93Che.tdb: BCC_A2, type code %B, sha256 b82ac7635cfdaa7b…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : AL ZN : VA : !

AlZn-93Mey-LB.tdb: BCC_A2, type code %B, sha256 676cd7377477636f…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : AL ZN : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/0364-5916(93)90011-Y S.-L. Chen, Y.A. Chang, Calphad, 17, 113-24(1993).
assessment that models this phase
doi:10.1016/S0364-5916(01)00004-9 M. Mathon, K. Jardet, E. Aragon, P. Satre, A. Sebaoun, Calphad, 24, 253-84(2000).
assessment that models this phase

FCC_A1 (Al–Zn)

Id: phase:al-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: stable in 5 of 5 calculated diagram(s): 300–933.47 K, x(Zn) 0–0.74215
Literature: 46 values (40 accepted) from 2 papers
Interactive: phase registry entry

Names (11): corpus: corpus:phase:al-zn:fcc-a1
paper: paper:10.1016/0364-5916(93)90011-y:fcc, paper:10.1016/0364-5916(93)90011-y:fcc1, paper:10.1016/s0364-5916(01)00004-9:fcc sol., paper:10.1016/s0364-5916(01)00004-9:fcc', paper:10.1016/s0364-5916(01)00004-9:fcc' sol.
tdb: tdb:AlZn-00Mat.tdb:FCC_A1, tdb:AlZn-20Din-3g.tdb:FCC_A1, tdb:AlZn-86Mey.tdb:FCC_A1, tdb:AlZn-93Che.tdb:FCC_A1, tdb:AlZn-93Mey-LB.tdb:FCC_A1

TDB models of FCC_A1 (5): PHASE and CONSTITUENT statements as written

AlZn-00Mat.tdb: FCC_A1, type code %A, sha256 c396f22f72e3f305…

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

AlZn-20Din-3g.tdb: FCC_A1, type code %A, sha256 d660148fb562e023…

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

AlZn-86Mey.tdb: FCC_A1, type code %A, sha256 e4f6db4a389e402f…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : AL ZN : VA : !

AlZn-93Che.tdb: FCC_A1, type code %A, sha256 b82ac7635cfdaa7b…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : AL ZN : VA : !

AlZn-93Mey-LB.tdb: FCC_A1, type code %A, sha256 676cd7377477636f…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : AL ZN : VA : !

Example references (5 of 5; assessments first):

doi:10.1016/S0364-5916(01)00004-9 M. Mathon, K. Jardet, E. Aragon, P. Satre, A. Sebaoun, Calphad, 24, 253-84(2000).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(93)90011-Y S.-L. Chen, Y.A. Chang, Calphad, 17, 113-24(1993).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101723 Alan Dinsdale, Ondrej Zobac, Ales Kroupa, Alexandra Khvan, Use of third generation data for the elements to model the thermodynamics of binary alloy systems: Part 1 – The critical assessment of data for the Al-Zn system, Calphad 68, 101723 (2020).
assessment that models this phase
doi:10.1039/ct8977100383 Charles Thomas Heycock, Francis Henry Neville, XXXIX.—The freezing points of alloys containing zinc and another metal, J. Chem. Soc., Trans. 71, 383-422 (1897).
cited as the source of values for this phase
doi:10.1515/ijmr-1936-281-1269 Hermann Auer, Karl Ernst Mann, Magnetische Untersuchung des Systems Zink-Aluminium, International Journal of Materials Research 28, 323-328 (1936).
cited as the source of values for this phase

HCP_A3 (Al–Zn)

Id: phase:al-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): 300–1467.6 K, x(Zn) 0.94777–1
Literature: 39 values (35 accepted) from 2 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:al-zn:hcp-a3
paper: paper:10.1016/0364-5916(93)90011-y:hcp, paper:10.1016/s0364-5916(01)00004-9:hcp, paper:10.1016/s0364-5916(01)00004-9:hcp sol.
tdb: tdb:AlZn-00Mat.tdb:HCP_A3, tdb:AlZn-20Din-3g.tdb:HCP_A3, tdb:AlZn-86Mey.tdb:HCP_A3, tdb:AlZn-93Che.tdb:HCP_A3, tdb:AlZn-93Mey-LB.tdb:HCP_A3

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

AlZn-00Mat.tdb: HCP_A3, type code %A, sha256 c396f22f72e3f305…

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

AlZn-20Din-3g.tdb: HCP_A3, type code %A, sha256 d660148fb562e023…

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

AlZn-86Mey.tdb: HCP_A3, type code %A, sha256 e4f6db4a389e402f…

41: PHASE HCP_A3 %A 2 1 0.5 !
42: CONST HCP_A3 : AL ZN : VA : !

AlZn-93Che.tdb: HCP_A3, type code %A, sha256 b82ac7635cfdaa7b…

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

AlZn-93Mey-LB.tdb: HCP_A3, type code %A, sha256 676cd7377477636f…

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

Example references (6 of 6; assessments first):

doi:10.1016/S0364-5916(01)00004-9 M. Mathon, K. Jardet, E. Aragon, P. Satre, A. Sebaoun, Calphad, 24, 253-84(2000).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(93)90011-Y S.-L. Chen, Y.A. Chang, Calphad, 17, 113-24(1993).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101723 Alan Dinsdale, Ondrej Zobac, Ales Kroupa, Alexandra Khvan, Use of third generation data for the elements to model the thermodynamics of binary alloy systems: Part 1 – The critical assessment of data for the Al-Zn system, Calphad 68, 101723 (2020).
assessment that models this phase
doi:10.1016/0001-6160(67)90153-8 L.E Larsson, Pre-precipitation and precipitation phenomena in the Al-Zn system, Acta Metallurgica 15, 35-44 (1967).
cited as the source of values for this phase
doi:10.1039/ct8977100383 Charles Thomas Heycock, Francis Henry Neville, XXXIX.—The freezing points of alloys containing zinc and another metal, J. Chem. Soc., Trans. 71, 383-422 (1897).
cited as the source of values for this phase
doi:10.1515/ijmr-1936-281-1269 Hermann Auer, Karl Ernst Mann, Magnetische Untersuchung des Systems Zink-Aluminium, International Journal of Materials Research 28, 323-328 (1936).
cited as the source of values for this phase

LIQUID (Al–Zn)

Id: phase:al-zn:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 5 of 5 calculated diagram(s): 653.07–2500 K, x(Zn) 0–1
Literature: 17 values (17 accepted) from 2 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:al-zn:liquid
paper: paper:10.1016/0364-5916(93)90011-y:L, paper:10.1016/s0364-5916(01)00004-9:liq.
tdb: tdb:AlZn-00Mat.tdb:LIQUID, tdb:AlZn-20Din-3g.tdb:LIQUID, tdb:AlZn-86Mey.tdb:LIQUID, tdb:AlZn-93Che.tdb:LIQUID, tdb:AlZn-93Mey-LB.tdb:LIQUID

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

AlZn-00Mat.tdb: LIQUID, type code %, sha256 c396f22f72e3f305…

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

AlZn-20Din-3g.tdb: LIQUID, type code %, sha256 d660148fb562e023…

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

AlZn-86Mey.tdb: LIQUID, type code %, sha256 e4f6db4a389e402f…

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

AlZn-93Che.tdb: LIQUID, type code %, sha256 b82ac7635cfdaa7b…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : AL ZN : !

AlZn-93Mey-LB.tdb: LIQUID, type code %, sha256 676cd7377477636f…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : AL ZN : !

Example references (4 of 4; assessments first):

doi:10.1016/S0364-5916(01)00004-9 M. Mathon, K. Jardet, E. Aragon, P. Satre, A. Sebaoun, Calphad, 24, 253-84(2000).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(93)90011-Y S.-L. Chen, Y.A. Chang, Calphad, 17, 113-24(1993).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101723 Alan Dinsdale, Ondrej Zobac, Ales Kroupa, Alexandra Khvan, Use of third generation data for the elements to model the thermodynamics of binary alloy systems: Part 1 – The critical assessment of data for the Al-Zn system, Calphad 68, 101723 (2020).
assessment that models this phase
doi:10.1039/ct8977100383 Charles Thomas Heycock, Francis Henry Neville, XXXIX.—The freezing points of alloys containing zinc and another metal, J. Chem. Soc., Trans. 71, 383-422 (1897).
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}
}