# Co–Zn phases > Co–Zn system: 11 phases (tier A 5, tier B 1, tier C 4, liquid 1); 11 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references. HTML: https://data.orchid-project.org/phases/pages/CO-ZN.html · Markdown: https://data.orchid-project.org/phases/pages/CO-ZN.md 11 phases (tier A 5, tier B 1, tier C 4, liquid 1); 11 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](https://orchid-project.org/phases/?q=CO-ZN) · [full JSON](https://data.orchid-project.org/phases/systems/CO-ZN.json) · [Co–Zn system page](https://data.orchid-project.org/systems/CO-ZN.html) · [Markdown](https://data.orchid-project.org/phases/pages/CO-ZN.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Co–Zn system (11) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [BCC_A2](#phase-co-zn-bcc-a2); _phase:co-zn:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 1 of 2 calculated diagram(s): 1193.31–1246.52 K, x(Zn) 0.49323–0.53266 | 12 | 2 | | [CO2ZN15](#phase-co-zn-co2zn15); _phase:co-zn:co2zn15_ | Co2Zn15 · mC28 · C2/m (12) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 948.09–1016.39 K, x(Zn) 0.88235–0.88235 | 12 | 1 | | [CO2ZN28](#phase-co-zn-co2zn28); _phase:co-zn:co2zn28_ | CoZn13 · mC28 · C2/m (12) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–850.44 K, x(Zn) 0.93333–0.93333 | 0 | 1 | | [CO3ZN22](#phase-co-zn-co3zn22); _phase:co-zn:co3zn22_ | CoZn7 · hP60 · P6_2 (171) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1020 K, x(Zn) 0.88–0.88 | 2 | 1 | | [CO5ZN21_D83](#phase-co-zn-co5zn21-d83); _phase:co-zn:co5zn21-d83_ | Al4Cu9 · D8_3 · cP52 · P-43m (215) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1176.77 K, x(Zn) 0.6858–0.81828 | 12 | 2 | | [COZN_A13](#phase-co-zn-cozn-a13); _phase:co-zn:cozn-a13_ | beta-Mn · A13 · cP20 · P4_132 (213) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1233.14 K, x(Zn) 0.46711–0.5699 | 21 | 2 | | [COZN13](#phase-co-zn-cozn13); _phase:co-zn:cozn13_ | CoZn13 · mC28 · C2/m (12) | tier B: DFT-supported (unique MP + OQMD match) | stable in 1 of 1 calculated diagram(s): 300–840.18 K, x(Zn) 0.92857–0.92857 | 8 | 1 | | [COZN7](#phase-co-zn-cozn7); _phase:co-zn:cozn7_ | CoZn7 · hP60 · P6_2 (171) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–961.13 K, x(Zn) 0.875–0.875 | 12 | 1 | | [FCC_A1](#phase-co-zn-fcc-a1); _phase:co-zn:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 380–1768.99 K, x(Zn) 0–0.36965 | 14 | 2 | | [HCP_A3](#phase-co-zn-hcp-a3); _phase:co-zn:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1647.6 K, x(Zn) 0–1 | 6 | 2 | | [LIQUID](#phase-co-zn-liquid); _phase:co-zn:liquid_ | liquid | liquid | stable in 2 of 2 calculated diagram(s): 692.6–2500 K, x(Zn) 0–1 | 35 | 2 | ## BCC_A2 (Co–Zn) - Id: `phase:co-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 2 calculated diagram(s): 1193.31–1246.52 K, x(Zn) 0.49323–0.53266 - Literature: 12 values (12 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-zn:bcc-a2) Names (5): _corpus: _corpus:phase:co-zn:bcc-a2 _paper: _paper:10.1361/15477030419522:β _system_alias: _system_alias:co-zn:beta _tdb: _tdb:CoZn-04Iso.tdb:BCC_A2, tdb:CoZn-04Vas-LB.tdb:BCC_A2 ### TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written [CoZn-04Iso.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Iso.tdb): BCC_A2, type code %B, sha256 `97df739c925a45d7…` ~~~~text 29: PHASE BCC_A2 %B 2 1 3 ! 30: CONST BCC_A2 : CO ZN : VA : ! ~~~~ [CoZn-04Vas-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Vas-LB.tdb): BCC_A2, type code %B, sha256 `d5353920b632f1ae…` ~~~~text 40: PHASE BCC_A2 %B 2 1 3 ! 41: CONST BCC_A2 : CO ZN : VA : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1361/15477030419522](https://doi.org/10.1361/15477030419522) George Penev Vassilev, Min Jiang, Thermodynamic Optimization of the Co-Zn System, Journal of Phase Equilibria & Diffusion 25, 259-268 (2004). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2003.12.002](https://doi.org/10.1016/j.jallcom.2003.12.002) I Isomäki, M Hämäläinen, Thermodynamic evaluation of the Co–Zn system, Journal of Alloys and Compounds 375, 191-195 (2004). _assessment that models this phase_ ## CO2ZN15 (Co–Zn) - Id: `phase:co-zn:co2zn15`; status `assigned` - Structure: Co2Zn15 · mC28 · C2/m (12); type `st:co2zn15-mc28`; 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](https://doi.org/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: Co 0.1176, Zn 0.8824 - Stability: stable in 1 of 1 calculated diagram(s): 948.09–1016.39 K, x(Zn) 0.88235–0.88235 - Literature: 12 values (12 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-zn:co2zn15) Names (3): _corpus: _corpus:phase:co-zn:co2zn15 _paper: _paper:10.1361/15477030419522:δ _tdb: _tdb:CoZn-04Vas-LB.tdb:CO2ZN15 ### TDB models of CO2ZN15 (1): PHASE and CONSTITUENT statements as written [CoZn-04Vas-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Vas-LB.tdb): CO2ZN15, type code %, sha256 `d5353920b632f1ae…` ~~~~text 65: PHASE CO2ZN15 % 2 2 15 ! 66: CONST CO2ZN15 : CO : ZN : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1361/15477030419522](https://doi.org/10.1361/15477030419522) George Penev Vassilev, Min Jiang, Thermodynamic Optimization of the Co-Zn System, Journal of Phase Equilibria & Diffusion 25, 259-268 (2004). _assessment that models this phase; reports values for this phase_ ## CO2ZN28 (Co–Zn) - Id: `phase:co-zn:co2zn28`; status `assigned` - Structure: CoZn13 · mC28 · C2/m (12); type `st:cozn13-mc28`; 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](https://doi.org/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: Co 0.0667, Zn 0.9333 - Stability: stable in 1 of 1 calculated diagram(s): 300–850.44 K, x(Zn) 0.93333–0.93333 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-zn:co2zn28) Names (2): _corpus: _corpus:phase:co-zn:co2zn28 _tdb: _tdb:CoZn-04Iso.tdb:CO2ZN28 ### TDB models of CO2ZN28 (1): PHASE and CONSTITUENT statements as written [CoZn-04Iso.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Iso.tdb): CO2ZN28, type code %, sha256 `97df739c925a45d7…` ~~~~text 54: PHASE CO2ZN28 % 2 2 28 ! 55: CONST CO2ZN28 : CO : ZN : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1016/j.jallcom.2003.12.002](https://doi.org/10.1016/j.jallcom.2003.12.002) I Isomäki, M Hämäläinen, Thermodynamic evaluation of the Co–Zn system, Journal of Alloys and Compounds 375, 191-195 (2004). _assessment that models this phase_ ## CO3ZN22 (Co–Zn) - Id: `phase:co-zn:co3zn22`; status `assigned` - Structure: CoZn7 · hP60 · P6_2 (171); type `st:cozn7-hp60`; 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](https://doi.org/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: Co 0.1200, Zn 0.8800 - Stability: stable in 1 of 1 calculated diagram(s): 300–1020 K, x(Zn) 0.88–0.88 - Literature: 2 values (0 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-zn:co3zn22) Names (3): _corpus: _corpus:phase:co-zn:co3zn22 _paper: _paper:10.1016/j.jallcom.2003.12.002:γ1 _tdb: _tdb:CoZn-04Iso.tdb:CO3ZN22 ### TDB models of CO3ZN22 (1): PHASE and CONSTITUENT statements as written [CoZn-04Iso.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Iso.tdb): CO3ZN22, type code %, sha256 `97df739c925a45d7…` ~~~~text 49: PHASE CO3ZN22 % 2 3 22 ! 50: CONST CO3ZN22 : CO : ZN : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2003.12.002](https://doi.org/10.1016/j.jallcom.2003.12.002) I Isomäki, M Hämäläinen, Thermodynamic evaluation of the Co–Zn system, Journal of Alloys and Compounds 375, 191-195 (2004). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02645345](https://doi.org/10.1007/bf02645345) T. Takayama, S. Shinohara, K. Ishida, T. Nishizawa, Anomalies in phase equilibria due to magnetic transition in Fe-Zn, Co-Zn, and Fe-Co-Zn systems, JPE 16, 390-395 (1995). _cited as the source of values for this phase_ ## CO5ZN21_D83 (Co–Zn) - Id: `phase:co-zn:co5zn21-d83`; status `assigned` - Structure: Al4Cu9 · D8_3 · cP52 · P-43m (215); type `st:d8-3-al4cu9-cp52`; tier A: standard phase name; confidence high - Caveat: partitioned order/disorder model in CoZn-04Iso.tdb also describes the disordered state - Stability: stable in 2 of 2 calculated diagram(s): 300–1176.77 K, x(Zn) 0.6858–0.81828 - Literature: 12 values (10 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-zn:co5zn21-d83) Names (5): _corpus: _corpus:phase:co-zn:co5zn21-d83 _paper: _paper:10.1016/j.jallcom.2003.12.002:γ, paper:10.1361/15477030419522:γ _tdb: _tdb:CoZn-04Iso.tdb:CO5ZN21_D83, tdb:CoZn-04Vas-LB.tdb:CO5ZN21_D83 ### TDB models of CO5ZN21_D83 (2): PHASE and CONSTITUENT statements as written [CoZn-04Iso.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Iso.tdb): CO5ZN21_D83, type code %, sha256 `97df739c925a45d7…` ~~~~text 44: PHASE CO5ZN21_D83 % 2 1 4 ! 45: CONST CO5ZN21_D83 : CO% ZN : CO ZN% : ! ~~~~ [CoZn-04Vas-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Vas-LB.tdb): CO5ZN21_D83, type code %, sha256 `d5353920b632f1ae…` ~~~~text 55: PHASE CO5ZN21_D83 % 1 1 ! 56: CONST CO5ZN21_D83 : CO ZN : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1361/15477030419522](https://doi.org/10.1361/15477030419522) George Penev Vassilev, Min Jiang, Thermodynamic Optimization of the Co-Zn System, Journal of Phase Equilibria & Diffusion 25, 259-268 (2004). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2003.12.002](https://doi.org/10.1016/j.jallcom.2003.12.002) I Isomäki, M Hämäläinen, Thermodynamic evaluation of the Co–Zn system, Journal of Alloys and Compounds 375, 191-195 (2004). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02645345](https://doi.org/10.1007/bf02645345) T. Takayama, S. Shinohara, K. Ishida, T. Nishizawa, Anomalies in phase equilibria due to magnetic transition in Fe-Zn, Co-Zn, and Fe-Co-Zn systems, JPE 16, 390-395 (1995). _cited as the source of values for this phase_ ## COZN_A13 (Co–Zn) - Id: `phase:co-zn:cozn-a13`; status `assigned` - Structure: beta-Mn · A13 · cP20 · P4_132 (213); type `st:a13-beta-mn-cp20`; tier A: standard phase name; confidence high - Stability: stable in 2 of 2 calculated diagram(s): 300–1233.14 K, x(Zn) 0.46711–0.5699 - Literature: 21 values (21 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-zn:cozn-a13) Names (5): _corpus: _corpus:phase:co-zn:cozn-a13 _paper: _paper:10.1016/j.jallcom.2003.12.002:β1, paper:10.1361/15477030419522:β1 _tdb: _tdb:CoZn-04Iso.tdb:COZN_A13, tdb:CoZn-04Vas-LB.tdb:COZN_A13 ### TDB models of COZN_A13 (2): PHASE and CONSTITUENT statements as written [CoZn-04Iso.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Iso.tdb): COZN_A13, type code %, sha256 `97df739c925a45d7…` ~~~~text 39: PHASE COZN_A13 % 2 1 1 ! 40: CONST COZN_A13 : CO% ZN : CO ZN% : ! ~~~~ [CoZn-04Vas-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Vas-LB.tdb): COZN_A13, type code %B, sha256 `d5353920b632f1ae…` ~~~~text 50: PHASE COZN_A13 %B 1 1 ! 51: CONST COZN_A13 : CO ZN : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1361/15477030419522](https://doi.org/10.1361/15477030419522) George Penev Vassilev, Min Jiang, Thermodynamic Optimization of the Co-Zn System, Journal of Phase Equilibria & Diffusion 25, 259-268 (2004). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2003.12.002](https://doi.org/10.1016/j.jallcom.2003.12.002) I Isomäki, M Hämäläinen, Thermodynamic evaluation of the Co–Zn system, Journal of Alloys and Compounds 375, 191-195 (2004). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02645345](https://doi.org/10.1007/bf02645345) T. Takayama, S. Shinohara, K. Ishida, T. Nishizawa, Anomalies in phase equilibria due to magnetic transition in Fe-Zn, Co-Zn, and Fe-Co-Zn systems, JPE 16, 390-395 (1995). _cited as the source of values for this phase_ ## COZN13 (Co–Zn) - Id: `phase:co-zn:cozn13`; status `assigned` - Structure: CoZn13 · mC28 · C2/m (12); type `st:cozn13-mc28`; tier B: DFT-supported (unique MP + OQMD match); confidence high - Stoichiometry: Co 0.0714, Zn 0.9286 - Stability: stable in 1 of 1 calculated diagram(s): 300–840.18 K, x(Zn) 0.92857–0.92857 - Literature: 8 values (8 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-zn:cozn13) Names (5): _corpus: _corpus:phase:co-zn:cozn13 _mp: _mp:mp-aaaabtfs _oqmd: _oqmd:oqmd-17125 _paper: _paper:10.1361/15477030419522:γ2 _tdb: _tdb:CoZn-04Vas-LB.tdb:COZN13 ### TDB models of COZN13 (1): PHASE and CONSTITUENT statements as written [CoZn-04Vas-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Vas-LB.tdb): COZN13, type code %, sha256 `d5353920b632f1ae…` ~~~~text 70: PHASE COZN13 % 2 1 13 ! 71: CONST COZN13 : CO : ZN : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1361/15477030419522](https://doi.org/10.1361/15477030419522) George Penev Vassilev, Min Jiang, Thermodynamic Optimization of the Co-Zn System, Journal of Phase Equilibria & Diffusion 25, 259-268 (2004). _assessment that models this phase; reports values for this phase_ ## COZN7 (Co–Zn) - Id: `phase:co-zn:cozn7`; status `assigned` - Structure: CoZn7 · hP60 · P6_2 (171); type `st:cozn7-hp60`; 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](https://doi.org/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: Co 0.1250, Zn 0.8750 - Stability: stable in 1 of 1 calculated diagram(s): 300–961.13 K, x(Zn) 0.875–0.875 - Literature: 12 values (12 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-zn:cozn7) Names (3): _corpus: _corpus:phase:co-zn:cozn7 _paper: _paper:10.1361/15477030419522:γ1 _tdb: _tdb:CoZn-04Vas-LB.tdb:COZN7 ### TDB models of COZN7 (1): PHASE and CONSTITUENT statements as written [CoZn-04Vas-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Vas-LB.tdb): COZN7, type code %, sha256 `d5353920b632f1ae…` ~~~~text 60: PHASE COZN7 % 2 1 7 ! 61: CONST COZN7 : CO : ZN : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1361/15477030419522](https://doi.org/10.1361/15477030419522) George Penev Vassilev, Min Jiang, Thermodynamic Optimization of the Co-Zn System, Journal of Phase Equilibria & Diffusion 25, 259-268 (2004). _assessment that models this phase; reports values for this phase_ ## FCC_A1 (Co–Zn) - Id: `phase:co-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 2 of 2 calculated diagram(s): 380–1768.99 K, x(Zn) 0–0.36965 - Literature: 14 values (14 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-zn:fcc-a1) Names (6): _corpus: _corpus:phase:co-zn:fcc-a1 _paper: _paper:10.1016/j.jallcom.2003.12.002:Fcc_A1, paper:10.1361/15477030419522:(αCo), paper:10.1361/15477030419522:α _tdb: _tdb:CoZn-04Iso.tdb:FCC_A1, tdb:CoZn-04Vas-LB.tdb:FCC_A1 ### TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written [CoZn-04Iso.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Iso.tdb): FCC_A1, type code %A, sha256 `97df739c925a45d7…` ~~~~text 24: PHASE FCC_A1 %A 2 1 1 ! 25: CONST FCC_A1 : CO% ZN : VA : ! ~~~~ [CoZn-04Vas-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Vas-LB.tdb): FCC_A1, type code %A, sha256 `d5353920b632f1ae…` ~~~~text 35: PHASE FCC_A1 %A 2 1 1 ! 36: CONST FCC_A1 : CO% ZN : VA : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1361/15477030419522](https://doi.org/10.1361/15477030419522) George Penev Vassilev, Min Jiang, Thermodynamic Optimization of the Co-Zn System, Journal of Phase Equilibria & Diffusion 25, 259-268 (2004). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2003.12.002](https://doi.org/10.1016/j.jallcom.2003.12.002) I Isomäki, M Hämäläinen, Thermodynamic evaluation of the Co–Zn system, Journal of Alloys and Compounds 375, 191-195 (2004). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02645345](https://doi.org/10.1007/bf02645345) T. Takayama, S. Shinohara, K. Ishida, T. Nishizawa, Anomalies in phase equilibria due to magnetic transition in Fe-Zn, Co-Zn, and Fe-Co-Zn systems, JPE 16, 390-395 (1995). _cited as the source of values for this phase_ ## HCP_A3 (Co–Zn) - Id: `phase:co-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 2 of 2 calculated diagram(s): 300–1647.6 K, x(Zn) 0–1 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-zn:hcp-a3) Names (5): _corpus: _corpus:phase:co-zn:hcp-a3 _paper: _paper:10.1361/15477030419522:(Zn), paper:10.1361/15477030419522:(εCo) _tdb: _tdb:CoZn-04Iso.tdb:HCP_A3, tdb:CoZn-04Vas-LB.tdb:HCP_A3 ### TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written [CoZn-04Iso.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Iso.tdb): HCP_A3, type code %A, sha256 `97df739c925a45d7…` ~~~~text 34: PHASE HCP_A3 %A 2 1 0.5 ! 35: CONST HCP_A3 : CO% ZN% : VA : ! ~~~~ [CoZn-04Vas-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Vas-LB.tdb): HCP_A3, type code %A, sha256 `d5353920b632f1ae…` ~~~~text 45: PHASE HCP_A3 %A 2 1 0.5 ! 46: CONST HCP_A3 : CO% ZN% : VA : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1361/15477030419522](https://doi.org/10.1361/15477030419522) George Penev Vassilev, Min Jiang, Thermodynamic Optimization of the Co-Zn System, Journal of Phase Equilibria & Diffusion 25, 259-268 (2004). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2003.12.002](https://doi.org/10.1016/j.jallcom.2003.12.002) I Isomäki, M Hämäläinen, Thermodynamic evaluation of the Co–Zn system, Journal of Alloys and Compounds 375, 191-195 (2004). _assessment that models this phase_ ## LIQUID (Co–Zn) - Id: `phase:co-zn:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 2 of 2 calculated diagram(s): 692.6–2500 K, x(Zn) 0–1 - Literature: 35 values (33 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-zn:liquid) Names (6): _corpus: _corpus:phase:co-zn:liquid _paper: _paper:10.1016/j.jallcom.2003.12.002:L, paper:10.1361/15477030419522:Co(L), paper:10.1361/15477030419522:L _tdb: _tdb:CoZn-04Iso.tdb:LIQUID, tdb:CoZn-04Vas-LB.tdb:LIQUID ### TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written [CoZn-04Iso.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Iso.tdb): LIQUID, type code %, sha256 `97df739c925a45d7…` ~~~~text 19: PHASE LIQUID:L % 1 1 ! 20: CONST LIQUID:L : CO ZN : ! ~~~~ [CoZn-04Vas-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CoZn-04Vas-LB.tdb): LIQUID, type code %, sha256 `d5353920b632f1ae…` ~~~~text 30: PHASE LIQUID:L % 1 1 ! 31: CONST LIQUID:L : CO ZN : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1361/15477030419522](https://doi.org/10.1361/15477030419522) George Penev Vassilev, Min Jiang, Thermodynamic Optimization of the Co-Zn System, Journal of Phase Equilibria & Diffusion 25, 259-268 (2004). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2003.12.002](https://doi.org/10.1016/j.jallcom.2003.12.002) I Isomäki, M Hämäläinen, Thermodynamic evaluation of the Co–Zn system, Journal of Alloys and Compounds 375, 191-195 (2004). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02645345](https://doi.org/10.1007/bf02645345) T. Takayama, S. Shinohara, K. Ishida, T. Nishizawa, Anomalies in phase equilibria due to magnetic transition in Fe-Zn, Co-Zn, and Fe-Co-Zn systems, JPE 16, 390-395 (1995). _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). https://doi.org/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). https://doi.org/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. ```bibtex @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} } ``` --- Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).