Hg–Zn phases

8 phases (tier A 4, tier C 1, liquid 1, needs_review 2); 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 · Hg–Zn system page · Markdown · field reference

Phases of the Hg–Zn system (8)
Phase	Structure	Basis	Stability (calculated)	TDB models
RHOMBO_A10 phase:hg-zn:a10-rhombo	alpha-Hg · A10 · hR1 · R-3m (166)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
BCC_A2 phase:hg-zn:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
FCC_A1 phase:hg-zn:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
HCP_A3 phase:hg-zn:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–692.68 K, x(Zn) 0.95854–1	1
HG3ZN phase:hg-zn:hg3zn		needs_review	not stable in 1 calculated diagram(s)	1
HGZN2 phase:hg-zn:hgzn2		needs_review	not stable in 1 calculated diagram(s)	1
HGZN3 phase:hg-zn:hgzn3	Cu3Ti · oC4 · Cmcm (63)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–315.63 K, x(Zn) 0.75–0.75	1
LIQUID phase:hg-zn:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 300–2500 K, x(Zn) 0–1	1

RHOMBO_A10 (Hg–Zn)

Id: phase:hg-zn:a10-rhombo; status assigned
Structure: alpha-Hg · A10 · hR1 · R-3m (166); type st:a10-alpha-hg-hr1; tier A: standard phase name; confidence high
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:hg-zn:a10-rhombo
tdb: tdb:HgZn-98Han-LB.tdb:RHOMBO_A10

TDB models of RHOMBO_A10 (1): PHASE and CONSTITUENT statements as written

HgZn-98Han-LB.tdb: RHOMBO_A10, type code %, sha256 bc1b12ff7603ad23…

40: PHASE RHOMBO_A10 % 1 1 !
41: CONST RHOMBO_A10 : HG% ZN : !

Example references (1 of 1; assessments first):

doi:10.1016/S0364-5916(98)00036-4 S.C. Hansen, Calphad, 22, 359-73(1998).
assessment that models this phase

BCC_A2 (Hg–Zn)

Id: phase:hg-zn:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stoichiometry: Zn 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:hg-zn:bcc-a2
tdb: tdb:HgZn-98Han-LB.tdb:BCC_A2

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

HgZn-98Han-LB.tdb: BCC_A2, type code %B, sha256 bc1b12ff7603ad23…

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

Example references (1 of 1; assessments first):

doi:10.1016/S0364-5916(98)00036-4 S.C. Hansen, Calphad, 22, 359-73(1998).
assessment that models this phase

FCC_A1 (Hg–Zn)

Id: phase:hg-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 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:hg-zn:fcc-a1
tdb: tdb:HgZn-98Han-LB.tdb:FCC_A1

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

HgZn-98Han-LB.tdb: FCC_A1, type code %A, sha256 bc1b12ff7603ad23…

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

Example references (1 of 1; assessments first):

doi:10.1016/S0364-5916(98)00036-4 S.C. Hansen, Calphad, 22, 359-73(1998).
assessment that models this phase

HCP_A3 (Hg–Zn)

Id: phase:hg-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 1 of 1 calculated diagram(s): 300–692.68 K, x(Zn) 0.95854–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:hg-zn:hcp-a3
tdb: tdb:HgZn-98Han-LB.tdb:HCP_A3

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

HgZn-98Han-LB.tdb: HCP_A3, type code %A, sha256 bc1b12ff7603ad23…

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

Example references (1 of 1; assessments first):

doi:10.1016/S0364-5916(98)00036-4 S.C. Hansen, Calphad, 22, 359-73(1998).
assessment that models this phase

HG3ZN (Hg–Zn)

Id: phase:hg-zn:hg3zn; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (sgte_mmc2): (Hg3Zn) — Hallstedt 2025 mmc2 row for HG3ZN: Hg3Zn
Stoichiometry: Hg 0.7500, Zn 0.2500
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:hg-zn:hg3zn
tdb: tdb:HgZn-98Han-LB.tdb:HG3ZN

TDB models of HG3ZN (1): PHASE and CONSTITUENT statements as written

HgZn-98Han-LB.tdb: HG3ZN, type code %, sha256 bc1b12ff7603ad23…

45: PHASE HG3ZN % 2 3 1 !
46: CONST HG3ZN : HG : ZN : !

Example references (1 of 1; assessments first):

doi:10.1016/S0364-5916(98)00036-4 S.C. Hansen, Calphad, 22, 359-73(1998).
assessment that models this phase

HGZN2 (Hg–Zn)

Id: phase:hg-zn:hgzn2; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (sgte_mmc2): (HgZn2) — Hallstedt 2025 mmc2 row for HGZN2: HgZn2
Stoichiometry: Hg 0.3333, Zn 0.6667
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:hg-zn:hgzn2
tdb: tdb:HgZn-98Han-LB.tdb:HGZN2

TDB models of HGZN2 (1): PHASE and CONSTITUENT statements as written

HgZn-98Han-LB.tdb: HGZN2, type code %, sha256 bc1b12ff7603ad23…

50: PHASE HGZN2 % 2 1 2 !
51: CONST HGZN2 : HG : ZN : !

Example references (1 of 1; assessments first):

doi:10.1016/S0364-5916(98)00036-4 S.C. Hansen, Calphad, 22, 359-73(1998).
assessment that models this phase

HGZN3 (Hg–Zn)

Id: phase:hg-zn:hgzn3; status assigned
Structure: Cu3Ti · oC4 · Cmcm (63); type st:cu3ti-oc4; 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_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Hg 0.2500, Zn 0.7500
Stability: stable in 1 of 1 calculated diagram(s): 300–315.63 K, x(Zn) 0.75–0.75
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:hg-zn:hgzn3
tdb: tdb:HgZn-98Han-LB.tdb:HGZN3

TDB models of HGZN3 (1): PHASE and CONSTITUENT statements as written

HgZn-98Han-LB.tdb: HGZN3, type code %, sha256 bc1b12ff7603ad23…

55: PHASE HGZN3 % 2 1 3 !
56: CONST HGZN3 : HG : ZN : !

Example references (1 of 1; assessments first):

doi:10.1016/S0364-5916(98)00036-4 S.C. Hansen, Calphad, 22, 359-73(1998).
assessment that models this phase

LIQUID (Hg–Zn)

Id: phase:hg-zn:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–2500 K, x(Zn) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:hg-zn:liquid
tdb: tdb:HgZn-98Han-LB.tdb:LIQUID

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

HgZn-98Han-LB.tdb: LIQUID, type code %, sha256 bc1b12ff7603ad23…

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

Example references (1 of 1; assessments first):

doi:10.1016/S0364-5916(98)00036-4 S.C. Hansen, Calphad, 22, 359-73(1998).
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}
}