Co–Ho phases

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 · full JSON · Co–Ho system page · Markdown · field reference

Phases of the Co–Ho system (12)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
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	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	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	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	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		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	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	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	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	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	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	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

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: BCC_A2, type code %B, sha256 2530e3403cc340aa…

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 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
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

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: CO17HO2, type code %A, sha256 2530e3403cc340aa…

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 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 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

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: CO2HO_C15, type code %A, sha256 2530e3403cc340aa…

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 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 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
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

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: CO3HO, type code %A, sha256 2530e3403cc340aa…

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 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 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
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

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: CO3HO4, type code %A, sha256 2530e3403cc340aa…

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 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 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

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: CO5HO_D2D, type code %A, sha256 2530e3403cc340aa…

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 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 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
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

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: CO7HO12, type code %, sha256 2530e3403cc340aa…

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 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 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
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

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: CO7HO2, type code %A, sha256 2530e3403cc340aa…

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 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 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

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: COHO3_D011, type code %A, sha256 2530e3403cc340aa…

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 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 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

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: FCC_A1, type code %A, sha256 2530e3403cc340aa…

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 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 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

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: HCP_A3, type code %A, sha256 2530e3403cc340aa…

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 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 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

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: LIQUID, type code %, sha256 2530e3403cc340aa…

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 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 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). 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}
}