# Co–Ho phases > Co–Ho system: 12 phases (tier A 5, tier C 5, liquid 1, needs_review 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-HO.html · Markdown: https://data.orchid-project.org/phases/pages/CO-HO.md 12 phases (tier A 5, tier C 5, liquid 1, needs_review 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-HO) · [full JSON](https://data.orchid-project.org/phases/systems/CO-HO.json) · [Co–Ho system page](https://data.orchid-project.org/systems/CO-HO.html) · [Markdown](https://data.orchid-project.org/phases/pages/CO-HO.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Co–Ho system (12) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [BCC_A2](#phase-co-ho-bcc-a2); _phase:co-ho:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 1 | 1 | | [CO17HO2](#phase-co-ho-co17ho2); _phase:co-ho:co17ho2_ | Ni17Th2 · hP38 · P6_3/mmc (194) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1648.67 K, x(Ho) 0.10526–0.10526 | 8 | 1 | | [CO2HO_C15](#phase-co-ho-co2ho-c15); _phase:co-ho:co2ho-c15_ | Cu2Mg · C15 · cF24 · Fd-3m (227) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1604.05 K, x(Ho) 0.33333–0.33333 | 6 | 1 | | [CO3HO](#phase-co-ho-co3ho); _phase:co-ho:co3ho_ | Ni3Pu · hR12 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1662.72 K, x(Ho) 0.25–0.25 | 6 | 1 | | [CO3HO4](#phase-co-ho-co3ho4); _phase:co-ho:co3ho4_ | Co3Ho4 · hP22 · P6_3/m (176) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1032.1 K, x(Ho) 0.57143–0.57143 | 2 | 1 | | [CO5HO_D2D](#phase-co-ho-co5ho-d2d); _phase:co-ho:co5ho-d2d_ | | needs_review | stable in 1 of 1 calculated diagram(s): 1427.13–1623.59 K, x(Ho) 0.15385–0.15385 | 6 | 1 | | [CO7HO12](#phase-co-ho-co7ho12); _phase:co-ho:co7ho12_ | Co7Ho12 · mP38 · P2_1/c (14) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1062.27 K, x(Ho) 0.63158–0.63158 | 8 | 1 | | [CO7HO2](#phase-co-ho-co7ho2); _phase:co-ho:co7ho2_ | Co7Gd2 · hR18 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1638.4 K, x(Ho) 0.22222–0.22222 | 6 | 1 | | [COHO3_D011](#phase-co-ho-coho3-d011); _phase:co-ho:coho3-d011_ | Fe3C · D0_11 · oP16 · Pnma (62) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1170.63 K, x(Ho) 0.75–0.75 | 4 | 1 | | [FCC_A1](#phase-co-ho-fcc-a1); _phase:co-ho:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 694.99–1767.99 K, x(Ho) 0–0 | 2 | 1 | | [HCP_A3](#phase-co-ho-hcp-a3); _phase:co-ho:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2499.79 K, x(Ho) 0–1 | 3 | 1 | | [LIQUID](#phase-co-ho-liquid); _phase:co-ho:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 1059.98–2500 K, x(Ho) 0–1 | 23 | 1 | ## BCC_A2 (Co–Ho) - Id: `phase:co-ho: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 1 calculated diagram(s) - Literature: 1 values (1 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-ho:bcc-a2) Names (3): _corpus: _corpus:phase:co-ho:bcc-a2 _paper: _paper:10.1016/j.jallcom.2008.10.062:BCC_A1 _tdb: _tdb:CoHo-09Jin.tdb:BCC_A2 ### TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written [CoHo-09Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/CoHo-09Jin.tdb): BCC_A2, type code %B, sha256 `2530e3403cc340aa…` ~~~~text 38: PHASE BCC_A2 %B 2 1 3 ! 39: CONST BCC_A2 : CO HO : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1016/j.jallcom.2008.10.062](https://doi.org/10.1016/j.jallcom.2008.10.062) S. Jin, J. Wang, L.G. Zhang, H.S. Liu, L.B. Liu, F. Zheng et al., Thermodynamic assessment of the Co–Ho binary system, Journal of Alloys and Compounds 477, 233-238 (2009). _assessment that models this phase; reports values for this phase_ ## CO17HO2 (Co–Ho) - Id: `phase:co-ho:co17ho2`; status `assigned` - Structure: Ni17Th2 · hP38 · P6_3/mmc (194); type `st:ni17th2-hp38`; 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_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Co 0.8947, Ho 0.1053 - Stability: stable in 1 of 1 calculated diagram(s): 300–1648.67 K, x(Ho) 0.10526–0.10526 - Literature: 8 values (8 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-ho:co17ho2) Names (3): _corpus: _corpus:phase:co-ho:co17ho2 _paper: _paper:10.1016/j.jallcom.2008.10.062:Co17Ho2 _tdb: _tdb:CoHo-09Jin.tdb:CO17HO2 ### TDB models of CO17HO2 (1): PHASE and CONSTITUENT statements as written [CoHo-09Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/CoHo-09Jin.tdb): CO17HO2, type code %A, sha256 `2530e3403cc340aa…` ~~~~text 48: PHASE CO17HO2 %A 2 17 2 ! 49: CONST CO17HO2 : CO : HO : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2008.10.062](https://doi.org/10.1016/j.jallcom.2008.10.062) S. Jin, J. Wang, L.G. Zhang, H.S. Liu, L.B. Liu, F. Zheng et al., Thermodynamic assessment of the Co–Ho binary system, Journal of Alloys and Compounds 477, 233-238 (2009). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90090-3](https://doi.org/10.1016/0022-5088%2869%2990090-3) K.H.J. Buschow, A.S. Van Der Goot, The holmium-cobalt system, Journal of the Less Common Metals 19, 153-158 (1969). _cited as the source of values for this phase_ ## CO2HO_C15 (Co–Ho) - Id: `phase:co-ho:co2ho-c15`; status `assigned` - Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type `st:c15-cu2mg-cf24`; tier A: standard phase name; confidence high - Stoichiometry: Co 0.6667, Ho 0.3333 - Stability: stable in 1 of 1 calculated diagram(s): 300–1604.05 K, x(Ho) 0.33333–0.33333 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-ho:co2ho-c15) Names (3): _corpus: _corpus:phase:co-ho:co2ho-c15 _paper: _paper:10.1016/j.jallcom.2008.10.062:Co2Ho _tdb: _tdb:CoHo-09Jin.tdb:CO2HO_C15 ### TDB models of CO2HO_C15 (1): PHASE and CONSTITUENT statements as written [CoHo-09Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/CoHo-09Jin.tdb): CO2HO_C15, type code %A, sha256 `2530e3403cc340aa…` ~~~~text 68: PHASE CO2HO_C15 %A 2 2 1 ! 69: CONST CO2HO_C15 : CO : HO : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2008.10.062](https://doi.org/10.1016/j.jallcom.2008.10.062) S. Jin, J. Wang, L.G. Zhang, H.S. Liu, L.B. Liu, F. Zheng et al., Thermodynamic assessment of the Co–Ho binary system, Journal of Alloys and Compounds 477, 233-238 (2009). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90090-3](https://doi.org/10.1016/0022-5088%2869%2990090-3) K.H.J. Buschow, A.S. Van Der Goot, The holmium-cobalt system, Journal of the Less Common Metals 19, 153-158 (1969). _cited as the source of values for this phase_ ## CO3HO (Co–Ho) - Id: `phase:co-ho:co3ho`; status `assigned` - Structure: Ni3Pu · hR12 · R-3m (166); type `st:ni3pu-hr12`; 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 (dft_space_group_166_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Co 0.7500, Ho 0.2500 - Stability: stable in 1 of 1 calculated diagram(s): 300–1662.72 K, x(Ho) 0.25–0.25 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-ho:co3ho) Names (3): _corpus: _corpus:phase:co-ho:co3ho _paper: _paper:10.1016/j.jallcom.2008.10.062:Co3Ho _tdb: _tdb:CoHo-09Jin.tdb:CO3HO ### TDB models of CO3HO (1): PHASE and CONSTITUENT statements as written [CoHo-09Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/CoHo-09Jin.tdb): CO3HO, type code %A, sha256 `2530e3403cc340aa…` ~~~~text 63: PHASE CO3HO %A 2 3 1 ! 64: CONST CO3HO : CO : HO : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2008.10.062](https://doi.org/10.1016/j.jallcom.2008.10.062) S. Jin, J. Wang, L.G. Zhang, H.S. Liu, L.B. Liu, F. Zheng et al., Thermodynamic assessment of the Co–Ho binary system, Journal of Alloys and Compounds 477, 233-238 (2009). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90090-3](https://doi.org/10.1016/0022-5088%2869%2990090-3) K.H.J. Buschow, A.S. Van Der Goot, The holmium-cobalt system, Journal of the Less Common Metals 19, 153-158 (1969). _cited as the source of values for this phase_ ## CO3HO4 (Co–Ho) - Id: `phase:co-ho:co3ho4`; status `assigned` - Structure: Co3Ho4 · hP22 · P6_3/m (176); type `st:co3ho4-hp22`; 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 0.4286, Ho 0.5714 - Stability: stable in 1 of 1 calculated diagram(s): 300–1032.1 K, x(Ho) 0.57143–0.57143 - Literature: 2 values (2 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-ho:co3ho4) Names (3): _corpus: _corpus:phase:co-ho:co3ho4 _paper: _paper:10.1016/j.jallcom.2008.10.062:Co3Ho4 _tdb: _tdb:CoHo-09Jin.tdb:CO3HO4 ### TDB models of CO3HO4 (1): PHASE and CONSTITUENT statements as written [CoHo-09Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/CoHo-09Jin.tdb): CO3HO4, type code %A, sha256 `2530e3403cc340aa…` ~~~~text 73: PHASE CO3HO4 %A 2 3 4 ! 74: CONST CO3HO4 : CO : HO : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2008.10.062](https://doi.org/10.1016/j.jallcom.2008.10.062) S. Jin, J. Wang, L.G. Zhang, H.S. Liu, L.B. Liu, F. Zheng et al., Thermodynamic assessment of the Co–Ho binary system, Journal of Alloys and Compounds 477, 233-238 (2009). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90090-3](https://doi.org/10.1016/0022-5088%2869%2990090-3) K.H.J. Buschow, A.S. Van Der Goot, The holmium-cobalt system, Journal of the Less Common Metals 19, 153-158 (1969). _cited as the source of values for this phase_ ## CO5HO_D2D (Co–Ho) - Id: `phase:co-ho:co5ho-d2d`; status `needs_review` - No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_D2_d; stoichiometry_contradicts_D2_d:CoHo-09Jin.tdb - Candidate (literature_printed): CaCu5 · hP6 — printed with a label mapped to this phase - Candidate (name_token): CaCu5 · D2_d · hP6 · P6/mmm (191) — Strukturbericht/word 'D2D' in the TDB name - Candidate (sgte_mmc2): CaCu5 · D2_d · hP6 · P6/mmm (191) — Hallstedt 2025 mmc2 row for CO5HO_D2D: Co5Ho - Candidate (tdb_comment): CaCu5 · hP6 · P6/mmm — CoHo-09Jin.tdb: 'Prototype CaCu5 (hP6, P6/mmm)' - Stoichiometry: Co 0.8462, Ho 0.1538 - Stability: stable in 1 of 1 calculated diagram(s): 1427.13–1623.59 K, x(Ho) 0.15385–0.15385 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-ho:co5ho-d2d) Names (3): _corpus: _corpus:phase:co-ho:co5ho-d2d _paper: _paper:10.1016/j.jallcom.2008.10.062:Co5.5Ho _tdb: _tdb:CoHo-09Jin.tdb:CO5HO_D2D ### TDB models of CO5HO_D2D (1): PHASE and CONSTITUENT statements as written [CoHo-09Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/CoHo-09Jin.tdb): CO5HO_D2D, type code %A, sha256 `2530e3403cc340aa…` ~~~~text 53: PHASE CO5HO_D2D %A 2 5.5 1 ! 54: CONST CO5HO_D2D : CO : HO : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2008.10.062](https://doi.org/10.1016/j.jallcom.2008.10.062) S. Jin, J. Wang, L.G. Zhang, H.S. Liu, L.B. Liu, F. Zheng et al., Thermodynamic assessment of the Co–Ho binary system, Journal of Alloys and Compounds 477, 233-238 (2009). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90090-3](https://doi.org/10.1016/0022-5088%2869%2990090-3) K.H.J. Buschow, A.S. Van Der Goot, The holmium-cobalt system, Journal of the Less Common Metals 19, 153-158 (1969). _cited as the source of values for this phase_ ## CO7HO12 (Co–Ho) - Id: `phase:co-ho:co7ho12`; status `assigned` - Structure: Co7Ho12 · mP38 · P2_1/c (14); type `st:co7ho12-mp38`; 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_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Co 0.3684, Ho 0.6316 - Stability: stable in 1 of 1 calculated diagram(s): 300–1062.27 K, x(Ho) 0.63158–0.63158 - Literature: 8 values (8 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-ho:co7ho12) Names (3): _corpus: _corpus:phase:co-ho:co7ho12 _paper: _paper:10.1016/j.jallcom.2008.10.062:Co7Ho12 _tdb: _tdb:CoHo-09Jin.tdb:CO7HO12 ### TDB models of CO7HO12 (1): PHASE and CONSTITUENT statements as written [CoHo-09Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/CoHo-09Jin.tdb): CO7HO12, type code %, sha256 `2530e3403cc340aa…` ~~~~text 78: PHASE CO7HO12 % 2 7 12 ! 79: CONST CO7HO12 : CO : HO : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2008.10.062](https://doi.org/10.1016/j.jallcom.2008.10.062) S. Jin, J. Wang, L.G. Zhang, H.S. Liu, L.B. Liu, F. Zheng et al., Thermodynamic assessment of the Co–Ho binary system, Journal of Alloys and Compounds 477, 233-238 (2009). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90090-3](https://doi.org/10.1016/0022-5088%2869%2990090-3) K.H.J. Buschow, A.S. Van Der Goot, The holmium-cobalt system, Journal of the Less Common Metals 19, 153-158 (1969). _cited as the source of values for this phase_ ## CO7HO2 (Co–Ho) - Id: `phase:co-ho:co7ho2`; status `assigned` - Structure: Co7Gd2 · hR18 · R-3m (166); type `st:co7gd2-hr18`; 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 0.7778, Ho 0.2222 - Stability: stable in 1 of 1 calculated diagram(s): 300–1638.4 K, x(Ho) 0.22222–0.22222 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-ho:co7ho2) Names (4): _corpus: _corpus:phase:co-ho:co7ho2 _paper: _paper:10.1016/j.jallcom.2008.10.062:Co2Ho7, paper:10.1016/j.jallcom.2008.10.062:Co7Ho2 _tdb: _tdb:CoHo-09Jin.tdb:CO7HO2 ### TDB models of CO7HO2 (1): PHASE and CONSTITUENT statements as written [CoHo-09Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/CoHo-09Jin.tdb): CO7HO2, type code %A, sha256 `2530e3403cc340aa…` ~~~~text 58: PHASE CO7HO2 %A 2 7 2 ! 59: CONST CO7HO2 : CO : HO : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2008.10.062](https://doi.org/10.1016/j.jallcom.2008.10.062) S. Jin, J. Wang, L.G. Zhang, H.S. Liu, L.B. Liu, F. Zheng et al., Thermodynamic assessment of the Co–Ho binary system, Journal of Alloys and Compounds 477, 233-238 (2009). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90090-3](https://doi.org/10.1016/0022-5088%2869%2990090-3) K.H.J. Buschow, A.S. Van Der Goot, The holmium-cobalt system, Journal of the Less Common Metals 19, 153-158 (1969). _cited as the source of values for this phase_ ## COHO3_D011 (Co–Ho) - Id: `phase:co-ho:coho3-d011`; status `assigned` - Structure: Fe3C · D0_11 · oP16 · Pnma (62); type `st:d0-11-fe3c-op16`; tier A: standard phase name; confidence high - Caveat: DFT agrees: on-hull mp-aaabjkyv and oqmd-29371, space group 62 - Stoichiometry: Co 0.2500, Ho 0.7500 - Stability: stable in 1 of 1 calculated diagram(s): 300–1170.63 K, x(Ho) 0.75–0.75 - Literature: 4 values (4 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-ho:coho3-d011) Names (5): _corpus: _corpus:phase:co-ho:coho3-d011 _mp: _mp:mp-aaabjkyv _oqmd: _oqmd:oqmd-29371 _paper: _paper:10.1016/j.jallcom.2008.10.062:CoHo3 _tdb: _tdb:CoHo-09Jin.tdb:COHO3_D011 ### TDB models of COHO3_D011 (1): PHASE and CONSTITUENT statements as written [CoHo-09Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/CoHo-09Jin.tdb): COHO3_D011, type code %A, sha256 `2530e3403cc340aa…` ~~~~text 83: PHASE COHO3_D011 %A 2 1 3 ! 84: CONST COHO3_D011 : CO : HO : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2008.10.062](https://doi.org/10.1016/j.jallcom.2008.10.062) S. Jin, J. Wang, L.G. Zhang, H.S. Liu, L.B. Liu, F. Zheng et al., Thermodynamic assessment of the Co–Ho binary system, Journal of Alloys and Compounds 477, 233-238 (2009). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90090-3](https://doi.org/10.1016/0022-5088%2869%2990090-3) K.H.J. Buschow, A.S. Van Der Goot, The holmium-cobalt system, Journal of the Less Common Metals 19, 153-158 (1969). _cited as the source of values for this phase_ ## FCC_A1 (Co–Ho) - Id: `phase:co-ho: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): 694.99–1767.99 K, x(Ho) 0–0 - Literature: 2 values (2 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-ho:fcc-a1) Names (3): _corpus: _corpus:phase:co-ho:fcc-a1 _paper: _paper:10.1016/j.jallcom.2008.10.062:FCC_A1 _tdb: _tdb:CoHo-09Jin.tdb:FCC_A1 ### TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written [CoHo-09Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/CoHo-09Jin.tdb): FCC_A1, type code %A, sha256 `2530e3403cc340aa…` ~~~~text 33: PHASE FCC_A1 %A 2 1 1 ! 34: CONST FCC_A1 : CO% HO : VA : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2008.10.062](https://doi.org/10.1016/j.jallcom.2008.10.062) S. Jin, J. Wang, L.G. Zhang, H.S. Liu, L.B. Liu, F. Zheng et al., Thermodynamic assessment of the Co–Ho binary system, Journal of Alloys and Compounds 477, 233-238 (2009). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90090-3](https://doi.org/10.1016/0022-5088%2869%2990090-3) K.H.J. Buschow, A.S. Van Der Goot, The holmium-cobalt system, Journal of the Less Common Metals 19, 153-158 (1969). _cited as the source of values for this phase_ ## HCP_A3 (Co–Ho) - Id: `phase:co-ho: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): 300–2499.79 K, x(Ho) 0–1 - Literature: 3 values (3 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-ho:hcp-a3) Names (3): _corpus: _corpus:phase:co-ho:hcp-a3 _paper: _paper:10.1016/j.jallcom.2008.10.062:HCP_A3 _tdb: _tdb:CoHo-09Jin.tdb:HCP_A3 ### TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written [CoHo-09Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/CoHo-09Jin.tdb): HCP_A3, type code %A, sha256 `2530e3403cc340aa…` ~~~~text 43: PHASE HCP_A3 %A 2 1 0.5 ! 44: CONST HCP_A3 : CO% HO% : VA : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2008.10.062](https://doi.org/10.1016/j.jallcom.2008.10.062) S. Jin, J. Wang, L.G. Zhang, H.S. Liu, L.B. Liu, F. Zheng et al., Thermodynamic assessment of the Co–Ho binary system, Journal of Alloys and Compounds 477, 233-238 (2009). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90090-3](https://doi.org/10.1016/0022-5088%2869%2990090-3) K.H.J. Buschow, A.S. Van Der Goot, The holmium-cobalt system, Journal of the Less Common Metals 19, 153-158 (1969). _cited as the source of values for this phase_ ## LIQUID (Co–Ho) - Id: `phase:co-ho:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 1059.98–2500 K, x(Ho) 0–1 - Literature: 23 values (23 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:co-ho:liquid) Names (3): _corpus: _corpus:phase:co-ho:liquid _paper: _paper:10.1016/j.jallcom.2008.10.062:L _tdb: _tdb:CoHo-09Jin.tdb:LIQUID ### TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written [CoHo-09Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/CoHo-09Jin.tdb): LIQUID, type code %, sha256 `2530e3403cc340aa…` ~~~~text 28: PHASE LIQUID:L % 1 1 ! 29: CONST LIQUID:L : CO HO : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2008.10.062](https://doi.org/10.1016/j.jallcom.2008.10.062) S. Jin, J. Wang, L.G. Zhang, H.S. Liu, L.B. Liu, F. Zheng et al., Thermodynamic assessment of the Co–Ho binary system, Journal of Alloys and Compounds 477, 233-238 (2009). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90090-3](https://doi.org/10.1016/0022-5088%2869%2990090-3) K.H.J. Buschow, A.S. Van Der Goot, The holmium-cobalt system, Journal of the Less Common Metals 19, 153-158 (1969). _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).