Co–Gd phases

13 phases (tier A 6, tier C 2, liquid 2, needs_review 3); 13 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–Gd system page · Markdown · field reference

Phases of the Co–Gd system (13)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:co-gd:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1508.16–2499.87 K, x(Gd) 0.99978–1	1	2
CO17GD2 phase:co-gd:co17gd2		needs_review	stable in 1 of 1 calculated diagram(s): 300–1657.58 K, x(Gd) 0.10526–0.10526	13	1
CO2GD_C15 phase:co-gd:co2gd-c15	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1388.91 K, x(Gd) 0.33333–0.33333	9	2
CO3GD phase:co-gd:co3gd	Ni3Pu · hR12 · R-3m (166)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–1550.01 K, x(Gd) 0.25–0.25	8	2
CO3GD4 phase:co-gd:co3gd4	Co3Ho4 · hP22 · P6_3/m (176)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–942.86 K, x(Gd) 0.57143–0.57143	7	2
CO5GD_D2D phase:co-gd:co5gd-d2d	CaCu5 · D2_d · hP6 · P6/mmm (191)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1123.03–1618.2 K, x(Gd) 0.16667–0.16667	10	1
CO7GD2 phase:co-gd:co7gd2		needs_review	stable in 2 of 2 calculated diagram(s): 300–1568.84 K, x(Gd) 0.22222–0.22222	10	2
COGD3_D011 phase:co-gd:cogd3-d011	Fe3C · D0_11 · oP16 · Pnma (62)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1052.9 K, x(Gd) 0.75–0.75	6	2
DELTA_PHASE phase:co-gd:delta-phase		needs_review	stable in 1 of 1 calculated diagram(s): 300–1642.9 K, x(Gd) 0.10526–0.16278	0	1
FCC_A1 phase:co-gd:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 479.99–1801.43 K, x(Gd) 0–0.00043	4	2
HCP_A3 phase:co-gd:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1508.27 K, x(Gd) 0–1	5	2
KAP_LIQ phase:co-gd:kap-liq	liquid	liquid	stable in 1 of 1 calculated diagram(s): 921.72–2500 K, x(Gd) 0–1	0	1
LIQUID phase:co-gd:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 889.76–2500 K, x(Gd) 0–1	27	2

BCC_A2 (Co–Gd)

Id: phase:co-gd: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 2 of 2 calculated diagram(s): 1508.16–2499.87 K, x(Gd) 0.99978–1
Literature: 1 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:co-gd:bcc-a2
paper: paper:10.1016/0925-8388(95)01578-7:b.c.c.
tdb: tdb:CoGd-10Wan.tdb:BCC_A2, tdb:CoGd-95Liu-LB.tdb:BCC_A2

TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written

CoGd-10Wan.tdb: BCC_A2, type code %B, sha256 782b5c5fea66780b…

45: PHASE BCC_A2 %B 2 1 3 !
46: CONST BCC_A2 : CO GD : VA : !

CoGd-95Liu-LB.tdb: BCC_A2, type code %B, sha256 a56e13c2aace898a…

46: PHASE BCC_A2 %B 2 1 3 !
47: CONST BCC_A2 : CO GD : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/0925-8388(95)01578-7 Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995).
assessment that models this phase; reports values for this phase
doi:10.3139/146.110415 W. Wang, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 1339-46(2010).
assessment that models this phase

CO17GD2 (Co–Gd)

Id: phase:co-gd:co17gd2; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_rows_disagree
Candidate (literature_printed): Ni17Th2 · hP38 — printed with a label mapped to this phase
Candidate (sgte_mmc2): Ni17Th2 · hP38 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for CO17GD2: Co17Gd2 (high T), see also Th2Zn17
Candidate (sgte_mmc2): Th2Zn17 · hR19 · R-3m (166) — Hallstedt 2025 mmc2 row for CO17GD2: Co17Gd2 (low T), see also Ni17Th2
Candidate (tdb_comment): Th2Zn17 · hR19 · R-3m — CoGd-95Liu-LB.tdb: 'Prototype Th2Zn17 (hR19, R-3m); low T, Ni17Th2 (hP38, P6_3/mmc); high T'
Stoichiometry: Co 0.8947, Gd 0.1053
Stability: stable in 1 of 1 calculated diagram(s): 300–1657.58 K, x(Gd) 0.10526–0.10526
Literature: 13 values (12 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:co-gd:co17gd2
paper: paper:10.1016/0925-8388(95)01578-7:Co17Gd2
tdb: tdb:CoGd-95Liu-LB.tdb:CO17GD2

TDB models of CO17GD2 (1): PHASE and CONSTITUENT statements as written

CoGd-95Liu-LB.tdb: CO17GD2, type code %A, sha256 a56e13c2aace898a…

56: PHASE CO17GD2 %A 2 17 2 !
57: CONST CO17GD2 : CO : GD : !

Example references (3 of 3; assessments first):

doi:10.1016/0925-8388(95)01578-7 Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(69)90140-4 K.H.J. Buschow, A.S. Van Der Goot, The intermetallic compounds in the gadolinium-cobalt system, Journal of the Less Common Metals 17, 249-255 (1969).
cited as the source of values for this phase
doi:10.1103/physrevb.6.2882 E. Burzo, Paramagnetic Behavior of Some Rare-Earth Cobalt Compounds, Phys. Rev. B 6, 2882-2887 (1972).
cited as the source of values for this phase

CO2GD_C15 (Co–Gd)

Id: phase:co-gd:co2gd-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, Gd 0.3333
Stability: stable in 2 of 2 calculated diagram(s): 300–1388.91 K, x(Gd) 0.33333–0.33333
Literature: 9 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:co-gd:co2gd-c15
paper: paper:10.1016/0925-8388(95)01578-7:Co2Gd
tdb: tdb:CoGd-10Wan.tdb:CO2GD_C15, tdb:CoGd-95Liu-LB.tdb:CO2GD_C15

TDB models of CO2GD_C15 (2): PHASE and CONSTITUENT statements as written

CoGd-10Wan.tdb: CO2GD_C15, type code %A, sha256 782b5c5fea66780b…

71: PHASE CO2GD_C15 %A 2 2 1 !
72: CONST CO2GD_C15 : CO : GD : !

CoGd-95Liu-LB.tdb: CO2GD_C15, type code %A, sha256 a56e13c2aace898a…

76: PHASE CO2GD_C15 %A 2 2 1 !
77: CONST CO2GD_C15 : CO : GD : !

Example references (4 of 4; assessments first):

doi:10.1016/0925-8388(95)01578-7 Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995).
assessment that models this phase; reports values for this phase
doi:10.3139/146.110415 W. Wang, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 1339-46(2010).
assessment that models this phase
doi:10.1016/0022-5088(69)90140-4 K.H.J. Buschow, A.S. Van Der Goot, The intermetallic compounds in the gadolinium-cobalt system, Journal of the Less Common Metals 17, 249-255 (1969).
cited as the source of values for this phase
doi:10.1103/physrevb.6.2882 E. Burzo, Paramagnetic Behavior of Some Rare-Earth Cobalt Compounds, Phys. Rev. B 6, 2882-2887 (1972).
cited as the source of values for this phase

CO3GD (Co–Gd)

Id: phase:co-gd:co3gd; 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 (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 0.7500, Gd 0.2500
Stability: stable in 2 of 2 calculated diagram(s): 300–1550.01 K, x(Gd) 0.25–0.25
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:co-gd:co3gd
paper: paper:10.1016/0925-8388(95)01578-7:Co3Gd
tdb: tdb:CoGd-10Wan.tdb:CO3GD, tdb:CoGd-95Liu-LB.tdb:CO3GD

TDB models of CO3GD (2): PHASE and CONSTITUENT statements as written

CoGd-10Wan.tdb: CO3GD, type code %A, sha256 782b5c5fea66780b…

66: PHASE CO3GD %A 2 3 1 !
67: CONST CO3GD : CO : GD : !

CoGd-95Liu-LB.tdb: CO3GD, type code %A, sha256 a56e13c2aace898a…

71: PHASE CO3GD %A 2 3 1 !
72: CONST CO3GD : CO : GD : !

Example references (4 of 4; assessments first):

doi:10.1016/0925-8388(95)01578-7 Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995).
assessment that models this phase; reports values for this phase
doi:10.3139/146.110415 W. Wang, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 1339-46(2010).
assessment that models this phase
doi:10.1016/0022-5088(69)90140-4 K.H.J. Buschow, A.S. Van Der Goot, The intermetallic compounds in the gadolinium-cobalt system, Journal of the Less Common Metals 17, 249-255 (1969).
cited as the source of values for this phase
doi:10.1103/physrevb.6.2882 E. Burzo, Paramagnetic Behavior of Some Rare-Earth Cobalt Compounds, Phys. Rev. B 6, 2882-2887 (1972).
cited as the source of values for this phase

CO3GD4 (Co–Gd)

Id: phase:co-gd:co3gd4; 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_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Co 0.4286, Gd 0.5714
Stability: stable in 2 of 2 calculated diagram(s): 300–942.86 K, x(Gd) 0.57143–0.57143
Literature: 7 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:co-gd:co3gd4
paper: paper:10.1016/0925-8388(95)01578-7:Co3Gd4
tdb: tdb:CoGd-10Wan.tdb:CO3GD4, tdb:CoGd-95Liu-LB.tdb:CO3GD4

TDB models of CO3GD4 (2): PHASE and CONSTITUENT statements as written

CoGd-10Wan.tdb: CO3GD4, type code %A, sha256 782b5c5fea66780b…

76: PHASE CO3GD4 %A 2 3 4 !
77: CONST CO3GD4 : CO : GD : !

CoGd-95Liu-LB.tdb: CO3GD4, type code %A, sha256 a56e13c2aace898a…

81: PHASE CO3GD4 %A 2 3 4 !
82: CONST CO3GD4 : CO : GD : !

Example references (4 of 4; assessments first):

doi:10.1016/0925-8388(95)01578-7 Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995).
assessment that models this phase; reports values for this phase
doi:10.3139/146.110415 W. Wang, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 1339-46(2010).
assessment that models this phase
doi:10.1016/0022-5088(69)90140-4 K.H.J. Buschow, A.S. Van Der Goot, The intermetallic compounds in the gadolinium-cobalt system, Journal of the Less Common Metals 17, 249-255 (1969).
cited as the source of values for this phase
doi:10.1103/physrevb.6.2882 E. Burzo, Paramagnetic Behavior of Some Rare-Earth Cobalt Compounds, Phys. Rev. B 6, 2882-2887 (1972).
cited as the source of values for this phase

CO5GD_D2D (Co–Gd)

Id: phase:co-gd:co5gd-d2d; status assigned
Structure: CaCu5 · D2_d · hP6 · P6/mmm (191); type st:d2-d-cacu5-hp6; tier A: standard phase name; confidence high
Stoichiometry: Co 0.8333, Gd 0.1667
Stability: stable in 1 of 1 calculated diagram(s): 1123.03–1618.2 K, x(Gd) 0.16667–0.16667
Literature: 10 values (9 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:co-gd:co5gd-d2d
paper: paper:10.1016/0925-8388(95)01578-7:Co5Gd
tdb: tdb:CoGd-95Liu-LB.tdb:CO5GD_D2D

TDB models of CO5GD_D2D (1): PHASE and CONSTITUENT statements as written

CoGd-95Liu-LB.tdb: CO5GD_D2D, type code %A, sha256 a56e13c2aace898a…

61: PHASE CO5GD_D2D %A 2 5 1 !
62: CONST CO5GD_D2D : CO : GD : !

Example references (3 of 3; assessments first):

doi:10.1016/0925-8388(95)01578-7 Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(69)90140-4 K.H.J. Buschow, A.S. Van Der Goot, The intermetallic compounds in the gadolinium-cobalt system, Journal of the Less Common Metals 17, 249-255 (1969).
cited as the source of values for this phase
doi:10.1103/physrevb.6.2882 E. Burzo, Paramagnetic Behavior of Some Rare-Earth Cobalt Compounds, Phys. Rev. B 6, 2882-2887 (1972).
cited as the source of values for this phase

CO7GD2 (Co–Gd)

Id: phase:co-gd:co7gd2; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_rows_disagree
Candidate (literature_printed): Ce2Ni7 · hP36 — printed with a label mapped to this phase
Candidate (sgte_mmc2): Ce2Ni7 · hP36 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for CO7GD2: Co7Gd2 (high T), see also Co7Gd2
Candidate (sgte_mmc2): Co7Gd2 · hR18 · R-3m (166) — Hallstedt 2025 mmc2 row for CO7GD2: Co7Gd2 (low T), see also Ce2Ni7
Candidate (tdb_comment): Co7Gd2 · hR18 · R-3m — CoGd-10Wan.tdb: 'Prototype Co7Gd2 (hR18, R-3m); low T, Ce2Ni7 (hP36, P6_3/mmc); high T'
Candidate (tdb_comment): Co7Gd2 · hR18 · R-3m — CoGd-95Liu-LB.tdb: 'Prototype Co7Gd2 (hR18, R-3m); low T, Ce2Ni7 (hP36, P6_3/mmc); high T'
Stoichiometry: Co 0.7778, Gd 0.2222
Stability: stable in 2 of 2 calculated diagram(s): 300–1568.84 K, x(Gd) 0.22222–0.22222
Literature: 10 values (9 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:co-gd:co7gd2
paper: paper:10.1016/0925-8388(95)01578-7:Co7Gd2
tdb: tdb:CoGd-10Wan.tdb:CO7GD2, tdb:CoGd-95Liu-LB.tdb:CO7GD2

TDB models of CO7GD2 (2): PHASE and CONSTITUENT statements as written

CoGd-10Wan.tdb: CO7GD2, type code %A, sha256 782b5c5fea66780b…

61: PHASE CO7GD2 %A 2 7 2 !
62: CONST CO7GD2 : CO : GD : !

CoGd-95Liu-LB.tdb: CO7GD2, type code %A, sha256 a56e13c2aace898a…

66: PHASE CO7GD2 %A 2 7 2 !
67: CONST CO7GD2 : CO : GD : !

Example references (4 of 4; assessments first):

doi:10.1016/0925-8388(95)01578-7 Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995).
assessment that models this phase; reports values for this phase
doi:10.3139/146.110415 W. Wang, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 1339-46(2010).
assessment that models this phase
doi:10.1016/0022-5088(69)90140-4 K.H.J. Buschow, A.S. Van Der Goot, The intermetallic compounds in the gadolinium-cobalt system, Journal of the Less Common Metals 17, 249-255 (1969).
cited as the source of values for this phase
doi:10.1103/physrevb.6.2882 E. Burzo, Paramagnetic Behavior of Some Rare-Earth Cobalt Compounds, Phys. Rev. B 6, 2882-2887 (1972).
cited as the source of values for this phase

COGD3_D011 (Co–Gd)

Id: phase:co-gd:cogd3-d011; status assigned
Structure: Fe3C · D0_11 · oP16 · Pnma (62); type st:d0-11-fe3c-op16; tier A: standard phase name; confidence high
Stoichiometry: Co 0.2500, Gd 0.7500
Stability: stable in 2 of 2 calculated diagram(s): 300–1052.9 K, x(Gd) 0.75–0.75
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:co-gd:cogd3-d011
paper: paper:10.1016/0925-8388(95)01578-7:CoGd3
tdb: tdb:CoGd-10Wan.tdb:COGD3_D011, tdb:CoGd-95Liu-LB.tdb:COGD3_D011

TDB models of COGD3_D011 (2): PHASE and CONSTITUENT statements as written

CoGd-10Wan.tdb: COGD3_D011, type code %A, sha256 782b5c5fea66780b…

81: PHASE COGD3_D011 %A 2 1 3 !
82: CONST COGD3_D011 : CO : GD : !

CoGd-95Liu-LB.tdb: COGD3_D011, type code %A, sha256 a56e13c2aace898a…

86: PHASE COGD3_D011 %A 2 1 3 !
87: CONST COGD3_D011 : CO : GD : !

Example references (4 of 4; assessments first):

doi:10.1016/0925-8388(95)01578-7 Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995).
assessment that models this phase; reports values for this phase
doi:10.3139/146.110415 W. Wang, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 1339-46(2010).
assessment that models this phase
doi:10.1016/0022-5088(69)90140-4 K.H.J. Buschow, A.S. Van Der Goot, The intermetallic compounds in the gadolinium-cobalt system, Journal of the Less Common Metals 17, 249-255 (1969).
cited as the source of values for this phase
doi:10.1103/physrevb.6.2882 E. Burzo, Paramagnetic Behavior of Some Rare-Earth Cobalt Compounds, Phys. Rev. B 6, 2882-2887 (1972).
cited as the source of values for this phase

DELTA_PHASE (Co–Gd)

Id: phase:co-gd:delta-phase; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model; sgte_mmc2_rows_disagree
Candidate (sgte_mmc2): CaCu5 · D2_d · hP6 · P6/mmm (191) — Hallstedt 2025 mmc2 row for DELTA_PHASE: Co5Gd, see also Th2Zn17 and Ni17Th2
Candidate (sgte_mmc2): Ni17Th2 · hP38 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for DELTA_PHASE: Co17Gd2 (high T), see also Th2Zn17 and CaCu5
Candidate (sgte_mmc2): Th2Zn17 · hR19 · R-3m (166) — Hallstedt 2025 mmc2 row for DELTA_PHASE: Co17Gd2 (low T), see also Ni17Th2 and CaCu5
Stability: stable in 1 of 1 calculated diagram(s): 300–1642.9 K, x(Gd) 0.10526–0.16278
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:co-gd:delta-phase
tdb: tdb:CoGd-10Wan.tdb:DELTA_PHASE

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

CoGd-10Wan.tdb: DELTA_PHASE, type code %A, sha256 782b5c5fea66780b…

56: PHASE DELTA_PHASE %A 3 1 2 15 !
57: CONST DELTA_PHASE : CO2 GD : CO2 GD : CO : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110415 W. Wang, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 1339-46(2010).
assessment that models this phase

FCC_A1 (Co–Gd)

Id: phase:co-gd: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): 479.99–1801.43 K, x(Gd) 0–0.00043
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:co-gd:fcc-a1
paper: paper:10.1016/0925-8388(95)01578-7:f.c.c.
tdb: tdb:CoGd-10Wan.tdb:FCC_A1, tdb:CoGd-95Liu-LB.tdb:FCC_A1

TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written

CoGd-10Wan.tdb: FCC_A1, type code %A, sha256 782b5c5fea66780b…

40: PHASE FCC_A1 %A 2 1 1 !
41: CONST FCC_A1 : CO% GD : VA : !

CoGd-95Liu-LB.tdb: FCC_A1, type code %A, sha256 a56e13c2aace898a…

41: PHASE FCC_A1 %A 2 1 1 !
42: CONST FCC_A1 : CO% GD : VA : !

Example references (3 of 3; assessments first):

doi:10.1016/0925-8388(95)01578-7 Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995).
assessment that models this phase; reports values for this phase
doi:10.3139/146.110415 W. Wang, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 1339-46(2010).
assessment that models this phase
doi:10.1016/0022-5088(69)90140-4 K.H.J. Buschow, A.S. Van Der Goot, The intermetallic compounds in the gadolinium-cobalt system, Journal of the Less Common Metals 17, 249-255 (1969).
cited as the source of values for this phase

HCP_A3 (Co–Gd)

Id: phase:co-gd: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): 300–1508.27 K, x(Gd) 0–1
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:co-gd:hcp-a3
paper: paper:10.1016/0925-8388(95)01578-7:h.c.p.
tdb: tdb:CoGd-10Wan.tdb:HCP_A3, tdb:CoGd-95Liu-LB.tdb:HCP_A3

TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written

CoGd-10Wan.tdb: HCP_A3, type code %A, sha256 782b5c5fea66780b…

50: PHASE HCP_A3 %A 2 1 0.5 !
51: CONST HCP_A3 : CO% GD% : VA : !

CoGd-95Liu-LB.tdb: HCP_A3, type code %A, sha256 a56e13c2aace898a…

51: PHASE HCP_A3 %A 2 1 0.5 !
52: CONST HCP_A3 : CO% GD% : VA : !

Example references (3 of 3; assessments first):

doi:10.1016/0925-8388(95)01578-7 Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995).
assessment that models this phase; reports values for this phase
doi:10.3139/146.110415 W. Wang, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 1339-46(2010).
assessment that models this phase
doi:10.1016/0022-5088(69)90140-4 K.H.J. Buschow, A.S. Van Der Goot, The intermetallic compounds in the gadolinium-cobalt system, Journal of the Less Common Metals 17, 249-255 (1969).
cited as the source of values for this phase

KAP_LIQ (Co–Gd)

Id: phase:co-gd:kap-liq; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 921.72–2500 K, x(Gd) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:co-gd:kap-liq
tdb: tdb:CoGd-10Wan.tdb:KAP_LIQ

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

CoGd-10Wan.tdb: KAP_LIQ, type code %, sha256 782b5c5fea66780b…

35: PHASE KAP_LIQ:L % 1 1 !
36: CONST KAP_LIQ:L : CO GD : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110415 W. Wang, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 1339-46(2010).
assessment that models this phase

LIQUID (Co–Gd)

Id: phase:co-gd:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 889.76–2500 K, x(Gd) 0–1
Literature: 27 values (26 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:co-gd:liquid
paper: paper:10.1016/0925-8388(95)01578-7:L
tdb: tdb:CoGd-10Wan.tdb:LIQUID, tdb:CoGd-95Liu-LB.tdb:LIQUID

TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written

CoGd-10Wan.tdb: LIQUID, type code %, sha256 782b5c5fea66780b…

30: PHASE LIQUID:L % 1 1 !
31: CONST LIQUID:L : CO GD : !

CoGd-95Liu-LB.tdb: LIQUID, type code %, sha256 a56e13c2aace898a…

36: PHASE LIQUID:L % 1 1 !
37: CONST LIQUID:L : CO GD : !

Example references (3 of 3; assessments first):

doi:10.1016/0925-8388(95)01578-7 Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995).
assessment that models this phase; reports values for this phase
doi:10.3139/146.110415 W. Wang, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 1339-46(2010).
assessment that models this phase
doi:10.1016/0022-5088(69)90140-4 K.H.J. Buschow, A.S. Van Der Goot, The intermetallic compounds in the gadolinium-cobalt system, Journal of the Less Common Metals 17, 249-255 (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}
}