Co–Ge phases

15 phases (tier A 7, tier C 4, liquid 1, needs_review 3); 14 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–Ge system page · Markdown · field reference

Phases of the Co–Ge system (15)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
DIAMOND_A4 phase:co-ge:a4-diamond	C (diamond) · A4 · cF8 · Fd-3m (227)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1211.4 K, x(Ge) 1–1	10	4
BCC_A2 phase:co-ge:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 4 calculated diagram(s)	0	4
CO2GE_C37 phase:co-ge:co2ge-c37	Co2Si · C37 · oP12 · Pnma (62)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–933.99 K, x(Ge) 0.33333–0.33333	4	2
CO3GE phase:co-ge:co3ge		needs_review	stable in 2 of 2 calculated diagram(s): 920–1060 K, x(Ge) 0.25–0.25	6	2
CO5GE2 phase:co-ge:co5ge2		needs_review	stable in 2 of 2 calculated diagram(s): 652.37–924.45 K, x(Ge) 0.28571–0.28571	5	2
CO5GE3 phase:co-ge:co5ge3	InNi2 · B8_2 · hP6 · P6_3/mmc (194)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1481.27 K, x(Ge) 0.375–0.375	5	1
CO5GE3_B82 phase:co-ge:co5ge3-b82	InNi2 · B8_2 · hP6 · P6_3/mmc (194)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1482.22 K, x(Ge) 0.33898–0.45007	58	3
CO5GE3_C37 phase:co-ge:co5ge3-c37		needs_review	stable in 1 of 1 calculated diagram(s): 300–655.66 K, x(Ge) 0.375–0.375	1	1
CO5GE7 phase:co-ge:co5ge7	Co5Ge7 · tI24 · I4mm (107)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 4 of 4 calculated diagram(s): 300–1119.77 K, x(Ge) 0.58333–0.58333	7	4
COGE phase:co-ge:coge	CoGe · mC16 · C2/m (12)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 4 of 4 calculated diagram(s): 300–1276.8 K, x(Ge) 0.48683–0.52883	42	4
COGE2 phase:co-ge:coge2	CoGe2 · oC24 · Cmce (64)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 4 of 4 calculated diagram(s): 300–1122.01 K, x(Ge) 0.66667–0.66667	44	4
FCC_A1 phase:co-ge:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 687.99–1818.74 K, x(Ge) 0–0.17235	3	6
L12_FCC phase:co-ge:fcc-l12	AuCu3 · L1_2 · cP4 · Pm-3m (221)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 750–1730 K, x(Ge) 0.01–0.25008	7	2
HCP_A3 phase:co-ge:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1425.86 K, x(Ge) 0–0.20219	34	4
LIQUID phase:co-ge:liquid	liquid	liquid	stable in 4 of 4 calculated diagram(s): 1087.69–2500 K, x(Ge) 0–1	53	4

DIAMOND_A4 (Co–Ge)

Id: phase:co-ge:a4-diamond; status assigned
Structure: C (diamond) · A4 · cF8 · Fd-3m (227); type st:a4-c-diamond-cf8; tier A: standard phase name; confidence high
Stoichiometry: Ge 1.0000
Stability: stable in 4 of 4 calculated diagram(s): 300–1211.4 K, x(Ge) 1–1
Literature: 10 values (10 accepted) from 3 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:co-ge:a4-diamond, corpus:phase:co-ge:diamond-a4
paper: paper:10.1007/bf02663678:(Ge), paper:10.1007/bf02663678:Ge, paper:10.1016/j.jallcom.2018.12.205:(Ge), paper:10.1016/j.tca.2013.08.026:(Ge)
tdb: tdb:CoGe-04Kor-LB.tdb:DIAMOND_A4, tdb:CoGe-13Don.tdb:DIAMOND_A4, tdb:CoGe-19Zen-ass.tdb:DIAMOND_A4, tdb:CoGe-19Zen-sub.tdb:DIAMOND_A4

TDB models of DIAMOND_A4 (4): PHASE and CONSTITUENT statements as written

CoGe-04Kor-LB.tdb: DIAMOND_A4, type code %, sha256 526f50de552aafad…

44: PHASE DIAMOND_A4 % 1 1 !
45: CONST DIAMOND_A4 : GE : !

CoGe-13Don.tdb: DIAMOND_A4, type code %, sha256 160f80fc562e4adc…

47: PHASE DIAMOND_A4 % 1 1 !
48: CONST DIAMOND_A4 : GE : !

CoGe-19Zen-ass.tdb: DIAMOND_A4, type code %, sha256 de75e3c47d8e84db…

63: PHASE DIAMOND_A4 % 1 1 !
64: CONST DIAMOND_A4 : GE : !

CoGe-19Zen-sub.tdb: DIAMOND_A4, type code %, sha256 2837674f94c2f661…

59: PHASE DIAMOND_A4 % 1 1 !
60: CONST DIAMOND_A4 : GE : !

Example references (7 of 7; assessments first):

doi:10.1016/j.jallcom.2018.12.205 Yinping Zeng, Yong Du, Han Li, Peng Zhou, Shuhong Liu, Kaiming Cheng et al., Thermodynamic description and solidified microstructure of the Co-Ge system, Journal of Alloys and Compounds 793, 480-491 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.tca.2013.08.026 S.S. Dong, S.G. Liu, X.M. Tao, F.H. Xiao, L.H. Huang, F. Yang et al., Thermodynamic optimization of Co–Ge binary system, Thermochimica Acta 572, 94-100 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02663678 I Ansara, F Ajersch, The Ga-Pb (Gallium-Lead) System, JPE 12, 73-77 (1991).
reports values for this phase
doi:10.1007/bf02663679 K Ishida, T Nishizawa, The Co-Ge (Cobalt-Germanium) System, JPE 12, 77-83 (1991).
cited as the source of values for this phase
doi:10.1007/s11669-017-0592-1 Yinping Zeng, Han Li, Yong Du, Yafei Pan, Yingbiao Peng, Peng Zhou et al., Experimental Investigation of the Co-Ge Phase Diagram, J. Phase Equilib. Diffus. 38, 843-852 (2017).
cited as the source of values for this phase
doi:10.1016/0022-5088(80)90252-0 André Dayer, Pierre Feschotte, Les systèmes binaires cobalt-germanium et nickel-germanium: Étude comparée, Journal of the Less Common Metals 72, 51-70 (1980).
cited as the source of values for this phase
doi:10.1515/ijmr-1949-401006 H. Pﬁsterer, K. Schubert, Z. Metallkd. 40 (1949) 378–383.
cited as the source of values for this phase

BCC_A2 (Co–Ge)

Id: phase:co-ge: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 4 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:co-ge:bcc-a2
tdb: tdb:CoGe-04Kor-LB.tdb:BCC_A2, tdb:CoGe-13Don.tdb:BCC_A2, tdb:CoGe-19Zen-ass.tdb:BCC_A2, tdb:CoGe-19Zen-sub.tdb:BCC_A2

TDB models of BCC_A2 (4): PHASE and CONSTITUENT statements as written

CoGe-04Kor-LB.tdb: BCC_A2, type code %B, sha256 526f50de552aafad…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : CO GE : VA : !

CoGe-13Don.tdb: BCC_A2, type code %B, sha256 160f80fc562e4adc…

37: PHASE BCC_A2 %B 2 1 3 !
38: CONST BCC_A2 : CO GE : VA : !

CoGe-19Zen-ass.tdb: BCC_A2, type code %B, sha256 de75e3c47d8e84db…

53: PHASE BCC_A2 %B 2 1 3 !
54: CONST BCC_A2 : CO GE : VA : !

CoGe-19Zen-sub.tdb: BCC_A2, type code %B, sha256 2837674f94c2f661…

49: PHASE BCC_A2 %B 2 1 3 !
50: CONST BCC_A2 : CO GE : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2018.12.205 Yinping Zeng, Yong Du, Han Li, Peng Zhou, Shuhong Liu, Kaiming Cheng et al., Thermodynamic description and solidified microstructure of the Co-Ge system, Journal of Alloys and Compounds 793, 480-491 (2019).
assessment that models this phase
doi:10.1016/j.tca.2013.08.026 S.S. Dong, S.G. Liu, X.M. Tao, F.H. Xiao, L.H. Huang, F. Yang et al., Thermodynamic optimization of Co–Ge binary system, Thermochimica Acta 572, 94-100 (2013).
assessment that models this phase

CO2GE_C37 (Co–Ge)

Id: phase:co-ge:co2ge-c37; status assigned
Structure: Co2Si · C37 · oP12 · Pnma (62); type st:c37-co2si-op12; tier A: standard phase name; confidence high
Stoichiometry: Co 0.6667, Ge 0.3333
Stability: stable in 2 of 2 calculated diagram(s): 300–933.99 K, x(Ge) 0.33333–0.33333
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:co-ge:co2ge-c37
paper: paper:10.1016/j.jallcom.2018.12.205:Co2Ge
tdb: tdb:CoGe-19Zen-ass.tdb:CO2GE_C37, tdb:CoGe-19Zen-sub.tdb:CO2GE_C37

TDB models of CO2GE_C37 (2): PHASE and CONSTITUENT statements as written

CoGe-19Zen-ass.tdb: CO2GE_C37, type code %, sha256 de75e3c47d8e84db…

68: PHASE CO2GE_C37 % 2 2 1 !
69: CONST CO2GE_C37 : CO : GE : !

CoGe-19Zen-sub.tdb: CO2GE_C37, type code %, sha256 2837674f94c2f661…

64: PHASE CO2GE_C37 % 2 2 1 !
65: CONST CO2GE_C37 : CO : GE : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2018.12.205 Yinping Zeng, Yong Du, Han Li, Peng Zhou, Shuhong Liu, Kaiming Cheng et al., Thermodynamic description and solidified microstructure of the Co-Ge system, Journal of Alloys and Compounds 793, 480-491 (2019).
assessment that models this phase; reports values for this phase

CO3GE (Co–Ge)

Id: phase:co-ge:co3ge; status needs_review
No structure assigned. Why: no_on_hull_entry_in_mp; no_structure_token
Candidate (dft_oqmd): Cmcm (63) — on-hull OQMD Co3 Ge1 at x(GE)=0.2500
Candidate (literature_printed): Cr3Si · cP8 — printed with a label mapped to this phase
Candidate (sgte_mmc2): Cr3Si · A15 · cP8 · Pm-3n (223) — Hallstedt 2025 mmc2 row for CO3GE: Co3Ge ?
Candidate (tdb_comment): Cr3Si · cP8 · Pm-3n — CoGe-04Kor-LB.tdb: 'Prototype Cr3Si (cP8, Pm-3n) ?'
Candidate (tdb_comment): Cr3Si · cP8 · Pm-3n — CoGe-13Don.tdb: 'Prototype Cr3Si (cP8, Pm-3n)'
Stoichiometry: Co 0.7500, Ge 0.2500
Stability: stable in 2 of 2 calculated diagram(s): 920–1060 K, x(Ge) 0.25–0.25
Literature: 6 values (6 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:co-ge:co3ge
paper: paper:10.1007/bf02663678:Co3Ge, paper:10.1016/j.tca.2013.08.026:Co3Ge
tdb: tdb:CoGe-04Kor-LB.tdb:CO3GE, tdb:CoGe-13Don.tdb:CO3GE

TDB models of CO3GE (2): PHASE and CONSTITUENT statements as written

CoGe-04Kor-LB.tdb: CO3GE, type code %, sha256 526f50de552aafad…

49: PHASE CO3GE % 2 3 1 !
50: CONST CO3GE : CO : GE : !

CoGe-13Don.tdb: CO3GE, type code %, sha256 160f80fc562e4adc…

52: PHASE CO3GE % 2 3 1 !
53: CONST CO3GE : CO : GE : !

Example references (3 of 3; assessments first):

doi:10.1016/j.tca.2013.08.026 S.S. Dong, S.G. Liu, X.M. Tao, F.H. Xiao, L.H. Huang, F. Yang et al., Thermodynamic optimization of Co–Ge binary system, Thermochimica Acta 572, 94-100 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02663678 I Ansara, F Ajersch, The Ga-Pb (Gallium-Lead) System, JPE 12, 73-77 (1991).
reports values for this phase
doi:10.1007/bf02663679 K Ishida, T Nishizawa, The Co-Ge (Cobalt-Germanium) System, JPE 12, 77-83 (1991).
cited as the source of values for this phase

CO5GE2 (Co–Ge)

Id: phase:co-ge:co5ge2; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (literature_printed): (Co5Ge2) · hP* — printed with a label mapped to this phase
Candidate (sgte_mmc2): (Co5Ge2) — Hallstedt 2025 mmc2 row for CO5GE2: Co5Ge2
Stoichiometry: Co 0.7143, Ge 0.2857
Stability: stable in 2 of 2 calculated diagram(s): 652.37–924.45 K, x(Ge) 0.28571–0.28571
Literature: 5 values (5 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:co-ge:co5ge2
paper: paper:10.1007/bf02663678:Co5Ge2, paper:10.1016/j.tca.2013.08.026:Co5Ge2
tdb: tdb:CoGe-04Kor-LB.tdb:CO5GE2, tdb:CoGe-13Don.tdb:CO5GE2

TDB models of CO5GE2 (2): PHASE and CONSTITUENT statements as written

CoGe-04Kor-LB.tdb: CO5GE2, type code %, sha256 526f50de552aafad…

54: PHASE CO5GE2 % 2 5 2 !
55: CONST CO5GE2 : CO : GE : !

CoGe-13Don.tdb: CO5GE2, type code %, sha256 160f80fc562e4adc…

57: PHASE CO5GE2 % 2 5 2 !
58: CONST CO5GE2 : CO : GE : !

Example references (3 of 3; assessments first):

doi:10.1016/j.tca.2013.08.026 S.S. Dong, S.G. Liu, X.M. Tao, F.H. Xiao, L.H. Huang, F. Yang et al., Thermodynamic optimization of Co–Ge binary system, Thermochimica Acta 572, 94-100 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02663678 I Ansara, F Ajersch, The Ga-Pb (Gallium-Lead) System, JPE 12, 73-77 (1991).
reports values for this phase
doi:10.1007/bf02663679 K Ishida, T Nishizawa, The Co-Ge (Cobalt-Germanium) System, JPE 12, 77-83 (1991).
cited as the source of values for this phase

CO5GE3 (Co–Ge)

Id: phase:co-ge:co5ge3; status assigned
Structure: InNi2 · B8_2 · hP6 · P6_3/mmc (194); type st:b8-2-inni2-hp6; 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_structure_token, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Co 0.6250, Ge 0.3750
Stability: stable in 1 of 1 calculated diagram(s): 300–1481.27 K, x(Ge) 0.375–0.375
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:co-ge:co5ge3
paper: paper:10.1007/bf02663678:βCo5Ge3
tdb: tdb:CoGe-04Kor-LB.tdb:CO5GE3

TDB models of CO5GE3 (1): PHASE and CONSTITUENT statements as written

CoGe-04Kor-LB.tdb: CO5GE3, type code %, sha256 526f50de552aafad…

60: PHASE CO5GE3 % 2 5 3 !
61: CONST CO5GE3 : CO : GE : !

Example references (1 of 1; assessments first):

doi:10.1007/bf02663678 I Ansara, F Ajersch, The Ga-Pb (Gallium-Lead) System, JPE 12, 73-77 (1991).
reports values for this phase

CO5GE3_B82 (Co–Ge)

Id: phase:co-ge:co5ge3-b82; status assigned
Structure: InNi2 · B8_2 · hP6 · P6_3/mmc (194); type st:b8-2-inni2-hp6; tier A: standard phase name; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 300–1482.22 K, x(Ge) 0.33898–0.45007
Literature: 58 values (58 accepted) from 2 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:co-ge:co5ge3-b82
paper: paper:10.1016/j.jallcom.2018.12.205:βCo5Ge3, paper:10.1016/j.tca.2013.08.026:βCo5Ge3
tdb: tdb:CoGe-13Don.tdb:CO5GE3_B82, tdb:CoGe-19Zen-ass.tdb:CO5GE3_B82, tdb:CoGe-19Zen-sub.tdb:CO5GE3_B82

TDB models of CO5GE3_B82 (3): PHASE and CONSTITUENT statements as written

CoGe-13Don.tdb: CO5GE3_B82, type code %, sha256 160f80fc562e4adc…

67: PHASE CO5GE3_B82 % 3 1 4 3 !
68: CONST CO5GE3_B82 : CO VA : CO : CO GE% : !

CoGe-19Zen-ass.tdb: CO5GE3_B82, type code %, sha256 de75e3c47d8e84db…

73: PHASE CO5GE3_B82 % 3 1 1 1 !
74: CONST CO5GE3_B82 : CO : CO VA : GE : !

CoGe-19Zen-sub.tdb: CO5GE3_B82, type code %, sha256 2837674f94c2f661…

69: PHASE CO5GE3_B82 % 3 1 1 1 !
70: CONST CO5GE3_B82 : CO : CO VA : GE : !

Example references (9 of 9; assessments first):

doi:10.1016/j.jallcom.2018.12.205 Yinping Zeng, Yong Du, Han Li, Peng Zhou, Shuhong Liu, Kaiming Cheng et al., Thermodynamic description and solidified microstructure of the Co-Ge system, Journal of Alloys and Compounds 793, 480-491 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.tca.2013.08.026 S.S. Dong, S.G. Liu, X.M. Tao, F.H. Xiao, L.H. Huang, F. Yang et al., Thermodynamic optimization of Co–Ge binary system, Thermochimica Acta 572, 94-100 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/0040-6031(79)85054-6 Bruno Predel, Wolfgang Vogelbein, Bildungsenthalpien fester legierungen der binären systeme des eisens, kobalts und nickels mit germanium und zinn, Thermochimica Acta 30, 201-215 (1979).
cited as the source of values for this phase
doi:10.1007/bf02663679 K Ishida, T Nishizawa, The Co-Ge (Cobalt-Germanium) System, JPE 12, 77-83 (1991).
cited as the source of values for this phase
doi:10.1016/0022-5088(80)90252-0 André Dayer, Pierre Feschotte, Les systèmes binaires cobalt-germanium et nickel-germanium: Étude comparée, Journal of the Less Common Metals 72, 51-70 (1980).
cited as the source of values for this phase
doi:10.1007/s11669-017-0592-1 Yinping Zeng, Han Li, Yong Du, Yafei Pan, Yingbiao Peng, Peng Zhou et al., Experimental Investigation of the Co-Ge Phase Diagram, J. Phase Equilib. Diffus. 38, 843-852 (2017).
cited as the source of values for this phase
doi:10.1515/ijmr-1949-401006 H. Pﬁsterer, K. Schubert, Z. Metallkd. 40 (1949) 378–383.
cited as the source of values for this phase
doi:10.1016/0022-5088(90)90117-3 H. Enoki, K. Ishida, T. Nishizawa, Phase equilibria in cobalt-rich portions of the Co-Si and Co-Ge systems, Journal of the Less Common Metals 160, 153-160 (1990).
cited as the source of values for this phase
doi:10.1016/0364-5916(83)90030-5 A.K. Niessen, F.R. de Boer, R. Boom, P.F. de Chatel, W.C.M. Mattens, A.R. Miedema, CALPHAD 7 (1983) 51–70.
cited as the source of values for this phase

CO5GE3_C37 (Co–Ge)

Id: phase:co-ge:co5ge3-c37; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_C37; stoichiometry_contradicts_C37:CoGe-13Don.tdb
Candidate (name_token): Co2Si · C37 · oP12 · Pnma (62) — Strukturbericht/word 'C37' in the TDB name
Candidate (sgte_mmc2): Co2Si · C37 · oP12 · Pnma (62) — Hallstedt 2025 mmc2 row for CO5GE3_C37: alpha-Co5Ge3
Candidate (tdb_comment): Co2Si · oP12 · Pnma — CoGe-13Don.tdb: 'Prototype Co2Si (oP12, Pnma)'
Stoichiometry: Co 0.6250, Ge 0.3750
Stability: stable in 1 of 1 calculated diagram(s): 300–655.66 K, x(Ge) 0.375–0.375
Literature: 1 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:co-ge:co5ge3-c37
paper: paper:10.1016/j.tca.2013.08.026:αCo5G3
tdb: tdb:CoGe-13Don.tdb:CO5GE3_C37

TDB models of CO5GE3_C37 (1): PHASE and CONSTITUENT statements as written

CoGe-13Don.tdb: CO5GE3_C37, type code %, sha256 160f80fc562e4adc…

62: PHASE CO5GE3_C37 % 2 5 3 !
63: CONST CO5GE3_C37 : CO : GE : !

Example references (1 of 1; assessments first):

doi:10.1016/j.tca.2013.08.026 S.S. Dong, S.G. Liu, X.M. Tao, F.H. Xiao, L.H. Huang, F. Yang et al., Thermodynamic optimization of Co–Ge binary system, Thermochimica Acta 572, 94-100 (2013).
assessment that models this phase; reports values for this phase

CO5GE7 (Co–Ge)

Id: phase:co-ge:co5ge7; status assigned
Structure: Co5Ge7 · tI24 · I4mm (107); type st:co5ge7-ti24; 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 0.4167, Ge 0.5833
Stability: stable in 4 of 4 calculated diagram(s): 300–1119.77 K, x(Ge) 0.58333–0.58333
Literature: 7 values (7 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:co-ge:co5ge7
paper: paper:10.1007/bf02663678:Co5Ge7, paper:10.1016/j.jallcom.2018.12.205:Co5Ge7, paper:10.1016/j.tca.2013.08.026:Co5Ge7
tdb: tdb:CoGe-04Kor-LB.tdb:CO5GE7, tdb:CoGe-13Don.tdb:CO5GE7, tdb:CoGe-19Zen-ass.tdb:CO5GE7, tdb:CoGe-19Zen-sub.tdb:CO5GE7

TDB models of CO5GE7 (4): PHASE and CONSTITUENT statements as written

CoGe-04Kor-LB.tdb: CO5GE7, type code %, sha256 526f50de552aafad…

70: PHASE CO5GE7 % 2 5 7 !
71: CONST CO5GE7 : CO : GE : !

CoGe-13Don.tdb: CO5GE7, type code %, sha256 160f80fc562e4adc…

77: PHASE CO5GE7 % 2 5 7 !
78: CONST CO5GE7 : CO : GE : !

CoGe-19Zen-ass.tdb: CO5GE7, type code %, sha256 de75e3c47d8e84db…

83: PHASE CO5GE7 % 2 5 7 !
84: CONST CO5GE7 : CO : GE : !

CoGe-19Zen-sub.tdb: CO5GE7, type code %, sha256 2837674f94c2f661…

79: PHASE CO5GE7 % 2 5 7 !
80: CONST CO5GE7 : CO : GE : !

Example references (6 of 6; assessments first):

doi:10.1016/j.jallcom.2018.12.205 Yinping Zeng, Yong Du, Han Li, Peng Zhou, Shuhong Liu, Kaiming Cheng et al., Thermodynamic description and solidified microstructure of the Co-Ge system, Journal of Alloys and Compounds 793, 480-491 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.tca.2013.08.026 S.S. Dong, S.G. Liu, X.M. Tao, F.H. Xiao, L.H. Huang, F. Yang et al., Thermodynamic optimization of Co–Ge binary system, Thermochimica Acta 572, 94-100 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02663678 I Ansara, F Ajersch, The Ga-Pb (Gallium-Lead) System, JPE 12, 73-77 (1991).
reports values for this phase
doi:10.1007/bf02663679 K Ishida, T Nishizawa, The Co-Ge (Cobalt-Germanium) System, JPE 12, 77-83 (1991).
cited as the source of values for this phase
doi:10.1007/s11669-017-0592-1 Yinping Zeng, Han Li, Yong Du, Yafei Pan, Yingbiao Peng, Peng Zhou et al., Experimental Investigation of the Co-Ge Phase Diagram, J. Phase Equilib. Diffus. 38, 843-852 (2017).
cited as the source of values for this phase
doi:10.1016/0022-5088(80)90252-0 André Dayer, Pierre Feschotte, Les systèmes binaires cobalt-germanium et nickel-germanium: Étude comparée, Journal of the Less Common Metals 72, 51-70 (1980).
cited as the source of values for this phase

COGE (Co–Ge)

Id: phase:co-ge:coge; status assigned
Structure: CoGe · mC16 · C2/m (12); type st:coge-mc16; 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_structure_token, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
Stability: stable in 4 of 4 calculated diagram(s): 300–1276.8 K, x(Ge) 0.48683–0.52883
Literature: 42 values (39 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:co-ge:coge
paper: paper:10.1007/bf02663678:CoGe, paper:10.1016/j.jallcom.2018.12.205:CoGe, paper:10.1016/j.tca.2013.08.026:CoGe
tdb: tdb:CoGe-04Kor-LB.tdb:COGE, tdb:CoGe-13Don.tdb:COGE, tdb:CoGe-19Zen-ass.tdb:COGE, tdb:CoGe-19Zen-sub.tdb:COGE

TDB models of COGE (4): PHASE and CONSTITUENT statements as written

CoGe-04Kor-LB.tdb: COGE, type code %, sha256 526f50de552aafad…

65: PHASE COGE % 2 1 1 !
66: CONST COGE : CO : GE : !

CoGe-13Don.tdb: COGE, type code %, sha256 160f80fc562e4adc…

72: PHASE COGE % 2 1 1 !
73: CONST COGE : CO% GE : CO GE% : !

CoGe-19Zen-ass.tdb: COGE, type code %, sha256 de75e3c47d8e84db…

78: PHASE COGE % 2 1 1 !
79: CONST COGE : CO% GE : CO GE% : !

CoGe-19Zen-sub.tdb: COGE, type code %, sha256 2837674f94c2f661…

74: PHASE COGE % 2 1 1 !
75: CONST COGE : CO% GE : CO GE% : !

Example references (8 of 8; assessments first):

doi:10.1016/j.tca.2013.08.026 S.S. Dong, S.G. Liu, X.M. Tao, F.H. Xiao, L.H. Huang, F. Yang et al., Thermodynamic optimization of Co–Ge binary system, Thermochimica Acta 572, 94-100 (2013).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jallcom.2018.12.205 Yinping Zeng, Yong Du, Han Li, Peng Zhou, Shuhong Liu, Kaiming Cheng et al., Thermodynamic description and solidified microstructure of the Co-Ge system, Journal of Alloys and Compounds 793, 480-491 (2019).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02663678 I Ansara, F Ajersch, The Ga-Pb (Gallium-Lead) System, JPE 12, 73-77 (1991).
reports values for this phase
doi:10.1007/bf02663679 K Ishida, T Nishizawa, The Co-Ge (Cobalt-Germanium) System, JPE 12, 77-83 (1991).
cited as the source of values for this phase
doi:10.1007/s11669-017-0592-1 Yinping Zeng, Han Li, Yong Du, Yafei Pan, Yingbiao Peng, Peng Zhou et al., Experimental Investigation of the Co-Ge Phase Diagram, J. Phase Equilib. Diffus. 38, 843-852 (2017).
cited as the source of values for this phase
doi:10.1016/0022-5088(80)90252-0 André Dayer, Pierre Feschotte, Les systèmes binaires cobalt-germanium et nickel-germanium: Étude comparée, Journal of the Less Common Metals 72, 51-70 (1980).
cited as the source of values for this phase
doi:10.1016/0040-6031(79)85054-6 Bruno Predel, Wolfgang Vogelbein, Bildungsenthalpien fester legierungen der binären systeme des eisens, kobalts und nickels mit germanium und zinn, Thermochimica Acta 30, 201-215 (1979).
cited as the source of values for this phase
doi:10.1515/ijmr-1949-401006 H. Pﬁsterer, K. Schubert, Z. Metallkd. 40 (1949) 378–383.
cited as the source of values for this phase

COGE2 (Co–Ge)

Id: phase:co-ge:coge2; status assigned
Structure: CoGe2 · oC24 · Cmce (64); type st:coge2-oc24; 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_64_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Co 0.3333, Ge 0.6667
Stability: stable in 4 of 4 calculated diagram(s): 300–1122.01 K, x(Ge) 0.66667–0.66667
Literature: 44 values (41 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:co-ge:coge2
paper: paper:10.1007/bf02663678:CoGe2, paper:10.1016/j.jallcom.2018.12.205:CoGe2, paper:10.1016/j.tca.2013.08.026:CoGe2
tdb: tdb:CoGe-04Kor-LB.tdb:COGE2, tdb:CoGe-13Don.tdb:COGE2, tdb:CoGe-19Zen-ass.tdb:COGE2, tdb:CoGe-19Zen-sub.tdb:COGE2

TDB models of COGE2 (4): PHASE and CONSTITUENT statements as written

CoGe-04Kor-LB.tdb: COGE2, type code %, sha256 526f50de552aafad…

75: PHASE COGE2 % 2 1 2 !
76: CONST COGE2 : CO : GE : !

CoGe-13Don.tdb: COGE2, type code %, sha256 160f80fc562e4adc…

82: PHASE COGE2 % 2 1 2 !
83: CONST COGE2 : CO : GE : !

CoGe-19Zen-ass.tdb: COGE2, type code %, sha256 de75e3c47d8e84db…

88: PHASE COGE2 % 2 1 2 !
89: CONST COGE2 : CO : GE : !

CoGe-19Zen-sub.tdb: COGE2, type code %, sha256 2837674f94c2f661…

84: PHASE COGE2 % 2 1 2 !
85: CONST COGE2 : CO : GE : !

Example references (9 of 9; assessments first):

doi:10.1016/j.tca.2013.08.026 S.S. Dong, S.G. Liu, X.M. Tao, F.H. Xiao, L.H. Huang, F. Yang et al., Thermodynamic optimization of Co–Ge binary system, Thermochimica Acta 572, 94-100 (2013).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jallcom.2018.12.205 Yinping Zeng, Yong Du, Han Li, Peng Zhou, Shuhong Liu, Kaiming Cheng et al., Thermodynamic description and solidified microstructure of the Co-Ge system, Journal of Alloys and Compounds 793, 480-491 (2019).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02663678 I Ansara, F Ajersch, The Ga-Pb (Gallium-Lead) System, JPE 12, 73-77 (1991).
reports values for this phase
doi:10.1007/bf02663679 K Ishida, T Nishizawa, The Co-Ge (Cobalt-Germanium) System, JPE 12, 77-83 (1991).
cited as the source of values for this phase
doi:10.1007/s11669-017-0592-1 Yinping Zeng, Han Li, Yong Du, Yafei Pan, Yingbiao Peng, Peng Zhou et al., Experimental Investigation of the Co-Ge Phase Diagram, J. Phase Equilib. Diffus. 38, 843-852 (2017).
cited as the source of values for this phase
doi:10.1016/0022-5088(80)90252-0 André Dayer, Pierre Feschotte, Les systèmes binaires cobalt-germanium et nickel-germanium: Étude comparée, Journal of the Less Common Metals 72, 51-70 (1980).
cited as the source of values for this phase
doi:10.1524/zkri.1956.107.1-2.99 Erwin Hellner, Flußspat-Misch-Typen<sup>1</sup>, Zeitschrift für Kristallographie 107, 99-123 (1956).
cited as the source of values for this phase
doi:10.1016/0040-6031(79)85054-6 Bruno Predel, Wolfgang Vogelbein, Bildungsenthalpien fester legierungen der binären systeme des eisens, kobalts und nickels mit germanium und zinn, Thermochimica Acta 30, 201-215 (1979).
cited as the source of values for this phase
doi:10.1515/ijmr-1949-401006 H. Pﬁsterer, K. Schubert, Z. Metallkd. 40 (1949) 378–383.
cited as the source of values for this phase

FCC_A1 (Co–Ge)

Id: phase:co-ge: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 4 of 4 calculated diagram(s): 687.99–1818.74 K, x(Ge) 0–0.17235
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:co-ge:fcc-a1
paper: paper:10.1016/j.tca.2013.08.026:α(Co)
tdb: tdb:CoGe-04Kor-LB.tdb:FCC_A1, tdb:CoGe-13Don.tdb:FCC_A1, tdb:CoGe-19Zen-ass.tdb:A1_FCC, tdb:CoGe-19Zen-ass.tdb:FCC_A1, tdb:CoGe-19Zen-sub.tdb:A1_FCC, tdb:CoGe-19Zen-sub.tdb:FCC_A1

TDB models of FCC_A1 (6): PHASE and CONSTITUENT statements as written

CoGe-04Kor-LB.tdb: FCC_A1, type code %A, sha256 526f50de552aafad…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : CO% GE : VA : !

CoGe-13Don.tdb: FCC_A1, type code %A, sha256 160f80fc562e4adc…

32: PHASE FCC_A1 %A 2 1 1 !
33: CONST FCC_A1 : CO% GE : VA : !

CoGe-19Zen-ass.tdb: A1_FCC, type code %A, sha256 de75e3c47d8e84db…

43: PHASE A1_FCC %A 2 1 1 !
44: CONST A1_FCC : CO% GE : VA : !

CoGe-19Zen-ass.tdb: FCC_A1, type code %A, sha256 de75e3c47d8e84db…

38: PHASE FCC_A1 %A 2 1 1 !
39: CONST FCC_A1 : CO% GE : VA : !

CoGe-19Zen-sub.tdb: A1_FCC, type code %A, sha256 2837674f94c2f661…

39: PHASE A1_FCC %A 2 1 1 !
40: CONST A1_FCC : CO% GE : VA : !

CoGe-19Zen-sub.tdb: FCC_A1, type code %A, sha256 2837674f94c2f661…

34: PHASE FCC_A1 %A 2 1 1 !
35: CONST FCC_A1 : CO% GE : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.tca.2013.08.026 S.S. Dong, S.G. Liu, X.M. Tao, F.H. Xiao, L.H. Huang, F. Yang et al., Thermodynamic optimization of Co–Ge binary system, Thermochimica Acta 572, 94-100 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2018.12.205 Yinping Zeng, Yong Du, Han Li, Peng Zhou, Shuhong Liu, Kaiming Cheng et al., Thermodynamic description and solidified microstructure of the Co-Ge system, Journal of Alloys and Compounds 793, 480-491 (2019).
assessment that models this phase
doi:10.1007/bf02663679 K Ishida, T Nishizawa, The Co-Ge (Cobalt-Germanium) System, JPE 12, 77-83 (1991).
cited as the source of values for this phase
doi:10.1016/0022-5088(90)90117-3 H. Enoki, K. Ishida, T. Nishizawa, Phase equilibria in cobalt-rich portions of the Co-Si and Co-Ge systems, Journal of the Less Common Metals 160, 153-160 (1990).
cited as the source of values for this phase

L12_FCC (Co–Ge)

Id: phase:co-ge:fcc-l12; status assigned
Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type st:l1-2-aucu3-cp4; tier A: standard phase name; confidence high
Caveat: CoGe-19Zen-ass.tdb: ordered phase with disordered part A1_FCC (order/disorder model)
Caveat: CoGe-19Zen-sub.tdb: ordered phase with disordered part A1_FCC (order/disorder model)
Caveat: partitioned order/disorder model in CoGe-19Zen-ass.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoGe-19Zen-sub.tdb also describes the disordered state
Stability: stable in 2 of 2 calculated diagram(s): 750–1730 K, x(Ge) 0.01–0.25008
Literature: 7 values (7 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:co-ge:fcc-l12
paper: paper:10.1016/j.jallcom.2018.12.205:Co3Ge
tdb: tdb:CoGe-19Zen-ass.tdb:L12_FCC, tdb:CoGe-19Zen-sub.tdb:L12_FCC

TDB models of L12_FCC (2): PHASE and CONSTITUENT statements as written

CoGe-19Zen-ass.tdb: L12_FCC, type code %AY, sha256 de75e3c47d8e84db…

48: PHASE L12_FCC %AY 3 0.75 0.25 1 !
49: CONST L12_FCC : CO% GE : CO GE% : VA :  !

CoGe-19Zen-sub.tdb: L12_FCC, type code %AY, sha256 2837674f94c2f661…

44: PHASE L12_FCC %AY 3 0.75 0.25 1 !
45: CONST L12_FCC : CO% GE : CO GE% : VA :  !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2018.12.205 Yinping Zeng, Yong Du, Han Li, Peng Zhou, Shuhong Liu, Kaiming Cheng et al., Thermodynamic description and solidified microstructure of the Co-Ge system, Journal of Alloys and Compounds 793, 480-491 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(80)90252-0 André Dayer, Pierre Feschotte, Les systèmes binaires cobalt-germanium et nickel-germanium: Étude comparée, Journal of the Less Common Metals 72, 51-70 (1980).
cited as the source of values for this phase

HCP_A3 (Co–Ge)

Id: phase:co-ge: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 4 of 4 calculated diagram(s): 300–1425.86 K, x(Ge) 0–0.20219
Literature: 34 values (34 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:co-ge:hcp-a3
paper: paper:10.1007/bf02663678:(εCo), paper:10.1016/j.jallcom.2018.12.205:ε(Co), paper:10.1016/j.tca.2013.08.026:ε(Co)
tdb: tdb:CoGe-04Kor-LB.tdb:HCP_A3, tdb:CoGe-13Don.tdb:HCP_A3, tdb:CoGe-19Zen-ass.tdb:HCP_A3, tdb:CoGe-19Zen-sub.tdb:HCP_A3

TDB models of HCP_A3 (4): PHASE and CONSTITUENT statements as written

CoGe-04Kor-LB.tdb: HCP_A3, type code %A, sha256 526f50de552aafad…

39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : CO% GE : VA : !

CoGe-13Don.tdb: HCP_A3, type code %A, sha256 160f80fc562e4adc…

42: PHASE HCP_A3 %A 2 1 0.5 !
43: CONST HCP_A3 : CO% GE : VA : !

CoGe-19Zen-ass.tdb: HCP_A3, type code %A, sha256 de75e3c47d8e84db…

58: PHASE HCP_A3 %A 2 1 0.5 !
59: CONST HCP_A3 : CO% GE : VA : !

CoGe-19Zen-sub.tdb: HCP_A3, type code %A, sha256 2837674f94c2f661…

54: PHASE HCP_A3 %A 2 1 0.5 !
55: CONST HCP_A3 : CO% GE : VA : !

Example references (8 of 8; assessments first):

doi:10.1016/j.tca.2013.08.026 S.S. Dong, S.G. Liu, X.M. Tao, F.H. Xiao, L.H. Huang, F. Yang et al., Thermodynamic optimization of Co–Ge binary system, Thermochimica Acta 572, 94-100 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2018.12.205 Yinping Zeng, Yong Du, Han Li, Peng Zhou, Shuhong Liu, Kaiming Cheng et al., Thermodynamic description and solidified microstructure of the Co-Ge system, Journal of Alloys and Compounds 793, 480-491 (2019).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02663678 I Ansara, F Ajersch, The Ga-Pb (Gallium-Lead) System, JPE 12, 73-77 (1991).
reports values for this phase
doi:10.1007/bf02663679 K Ishida, T Nishizawa, The Co-Ge (Cobalt-Germanium) System, JPE 12, 77-83 (1991).
cited as the source of values for this phase
doi:10.1016/0022-5088(80)90252-0 André Dayer, Pierre Feschotte, Les systèmes binaires cobalt-germanium et nickel-germanium: Étude comparée, Journal of the Less Common Metals 72, 51-70 (1980).
cited as the source of values for this phase
doi:10.1016/0022-5088(90)90117-3 H. Enoki, K. Ishida, T. Nishizawa, Phase equilibria in cobalt-rich portions of the Co-Si and Co-Ge systems, Journal of the Less Common Metals 160, 153-160 (1990).
cited as the source of values for this phase
doi:10.1007/s11669-017-0592-1 Yinping Zeng, Han Li, Yong Du, Yafei Pan, Yingbiao Peng, Peng Zhou et al., Experimental Investigation of the Co-Ge Phase Diagram, J. Phase Equilib. Diffus. 38, 843-852 (2017).
cited as the source of values for this phase
doi:10.1515/ijmr-1949-401006 H. Pﬁsterer, K. Schubert, Z. Metallkd. 40 (1949) 378–383.
cited as the source of values for this phase

LIQUID (Co–Ge)

Id: phase:co-ge:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 4 of 4 calculated diagram(s): 1087.69–2500 K, x(Ge) 0–1
Literature: 53 values (53 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:co-ge:liquid
paper: paper:10.1007/bf02663678:L, paper:10.1016/j.jallcom.2018.12.205:L, paper:10.1016/j.tca.2013.08.026:L
tdb: tdb:CoGe-04Kor-LB.tdb:LIQUID, tdb:CoGe-13Don.tdb:LIQUID, tdb:CoGe-19Zen-ass.tdb:LIQUID, tdb:CoGe-19Zen-sub.tdb:LIQUID

TDB models of LIQUID (4): PHASE and CONSTITUENT statements as written

CoGe-04Kor-LB.tdb: LIQUID, type code %, sha256 526f50de552aafad…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : CO GE : !

CoGe-13Don.tdb: LIQUID, type code %, sha256 160f80fc562e4adc…

27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : CO GE : !

CoGe-19Zen-ass.tdb: LIQUID, type code %, sha256 de75e3c47d8e84db…

33: PHASE LIQUID:L % 1 1 !
34: CONST LIQUID:L : CO COGE GE : !

CoGe-19Zen-sub.tdb: LIQUID, type code %, sha256 2837674f94c2f661…

29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : CO GE : !

Example references (8 of 8; assessments first):

doi:10.1016/j.jallcom.2018.12.205 Yinping Zeng, Yong Du, Han Li, Peng Zhou, Shuhong Liu, Kaiming Cheng et al., Thermodynamic description and solidified microstructure of the Co-Ge system, Journal of Alloys and Compounds 793, 480-491 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.tca.2013.08.026 S.S. Dong, S.G. Liu, X.M. Tao, F.H. Xiao, L.H. Huang, F. Yang et al., Thermodynamic optimization of Co–Ge binary system, Thermochimica Acta 572, 94-100 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02663678 I Ansara, F Ajersch, The Ga-Pb (Gallium-Lead) System, JPE 12, 73-77 (1991).
reports values for this phase
doi:10.1007/bf02663679 K Ishida, T Nishizawa, The Co-Ge (Cobalt-Germanium) System, JPE 12, 77-83 (1991).
cited as the source of values for this phase
doi:10.1007/s11669-017-0592-1 Yinping Zeng, Han Li, Yong Du, Yafei Pan, Yingbiao Peng, Peng Zhou et al., Experimental Investigation of the Co-Ge Phase Diagram, J. Phase Equilib. Diffus. 38, 843-852 (2017).
cited as the source of values for this phase
doi:10.1016/0022-5088(80)90252-0 André Dayer, Pierre Feschotte, Les systèmes binaires cobalt-germanium et nickel-germanium: Étude comparée, Journal of the Less Common Metals 72, 51-70 (1980).
cited as the source of values for this phase
doi:10.1515/ijmr-1949-401006 H. Pﬁsterer, K. Schubert, Z. Metallkd. 40 (1949) 378–383.
cited as the source of values for this phase
doi:10.1016/0022-5088(90)90117-3 H. Enoki, K. Ishida, T. Nishizawa, Phase equilibria in cobalt-rich portions of the Co-Si and Co-Ge systems, Journal of the Less Common Metals 160, 153-160 (1990).
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}
}