Co–Ta phases

19 phases (tier A 12, tier C 2, liquid 1, needs_review 4); 18 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–Ta system page · Markdown · field reference

Phases of the Co–Ta system (19)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:co-ta:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–4000 K, x(Ta) 0.8606–1	12	6
C14_LAVES phase:co-ta:c14-laves	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1403.36–1840 K, x(Ta) 0.36178–0.36323	4	1
C15_LAVES phase:co-ta:c15-laves	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1895.72 K, x(Ta) 0.28736–0.33892	11	2
C36_LAVES phase:co-ta:c36-laves	MgNi2 · C36 · hP24 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1727.19 K, x(Ta) 0.24578–0.27082	9	1
CO16TA9_C14 phase:co-ta:co16ta9-c14		needs_review	stable in 1 of 1 calculated diagram(s): 1320–1840 K, x(Ta) 0.36–0.36	0	1
CO2TA_C14 phase:co-ta:co2ta-c14	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 1538.23–1864.11 K, x(Ta) 0.35991–0.37341	16	4
CO2TA_C15 phase:co-ta:co2ta-c15	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1923.45 K, x(Ta) 0.25891–0.3451	24	4
CO2TA_C36 phase:co-ta:co2ta-c36	MgNi2 · C36 · hP24 · P6_3/mmc (194)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 1220.39–1850 K, x(Ta) 0.22511–0.2713	21	4
CO3TA phase:co-ta:co3ta	BaPb3 · hR12 · R-3m (166)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1320.39 K, x(Ta) 0.2363–0.25	0	1
CO3TA_C36 phase:co-ta:co3ta-c36		needs_review	stable in 1 of 1 calculated diagram(s): 300–1720.72 K, x(Ta) 0.25–0.25	0	1
CO7TA2 phase:co-ta:co7ta2	BaPb3 · hR12 · R-3m (166)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 5 of 5 calculated diagram(s): 300–1316.43 K, x(Ta) 0.22222–0.22222	16	5
COTA2_C16 phase:co-ta:cota2-c16	Al2Cu · C16 · tI12 · I4/mcm (140)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–2225.5 K, x(Ta) 0.62275–0.68661	19	6
MU_D85 phase:co-ta:d85-mu	Fe7W6 · D8_5 · hR13 · R-3m (166)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–2045.23 K, x(Ta) 0.44838–0.55701	38	6
DIS_MU phase:co-ta:dis-mu		needs_review	not stable in 1 calculated diagram(s)	0	1
FCC_4SL phase:co-ta:fcc-4sl		needs_review	stable in 2 of 2 calculated diagram(s): 691.7–1769.38 K, x(Ta) 0–0.05936	0	2
FCC_A1 phase:co-ta:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 621.48–1777.64 K, x(Ta) 0–0.05936	24	9
L12_FCC phase:co-ta:fcc-l12	AuCu3 · L1_2 · cP4 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 671.48–1773.65 K, x(Ta) 0–0.05927	10	1
HCP_A3 phase:co-ta:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–729.98 K, x(Ta) 0–0.01216	5	6
LIQUID phase:co-ta:liquid	liquid	liquid	stable in 6 of 6 calculated diagram(s): 1552.64–4000 K, x(Ta) 0–1	54	6

BCC_A2 (Co–Ta)

Id: phase:co-ta: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 6 of 6 calculated diagram(s): 300–4000 K, x(Ta) 0.8606–1
Literature: 12 values (12 accepted) from 3 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:co-ta:bcc-a2
paper: paper:10.1016/j.calphad.2018.12.002:BCC, paper:10.1016/j.jallcom.2022.166723:bcc, paper:10.1016/s0364-5916(00)00005-5:bcc
tdb: tdb:CoTa-02Har.tdb:BCC_A2, tdb:CoTa-14Shi.tdb:BCC_A2, tdb:CoTa-19Wan.tdb:BCC_A2, tdb:CoTa-19Zho.tdb:BCC_A2, tdb:CoTa-22Wan.tdb:BCC_A2, tdb:CoTa-99Liu-LB.tdb:BCC_A2

TDB models of BCC_A2 (6): PHASE and CONSTITUENT statements as written

CoTa-02Har.tdb: BCC_A2, type code %B, sha256 c7251b1bb94512ab…

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

CoTa-14Shi.tdb: BCC_A2, type code %B, sha256 e4d873cf93726ad0…

43: PHASE BCC_A2 %B 2 1 3 !
44: CONST BCC_A2 : CO TA% : VA : !

CoTa-19Wan.tdb: BCC_A2, type code %B, sha256 0188b050430162f4…

44: PHASE BCC_A2 %B 2 1 3 !
45: CONST BCC_A2 : CO TA% : VA : !

CoTa-19Zho.tdb: BCC_A2, type code %B, sha256 f38abf64bd567e76…

48: PHASE BCC_A2 %B 2 1 3 !
49: CONST BCC_A2 : CO TA% : VA : !

CoTa-22Wan.tdb: BCC_A2, type code %B, sha256 cab3db05a3994913…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : CO TA% : VA : !

CoTa-99Liu-LB.tdb: BCC_A2, type code %B, sha256 2d4f912a1ca1b737…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : CO TA% : VA : !

Example references (6 of 6; assessments first):

doi:10.1016/j.calphad.2018.12.002 Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2022.166723 Cuiping Wang, Xiaodong Chen, Peng Yang, Qianqian Zhang, Shuiyuan Yang, Yong Lu et al., Experimental investigation and thermodynamic assessment of phase equilibria in the Al-Co-Ta ternary system, Journal of Alloys and Compounds 925, 166723 (2022).
assessment that models this phase; reports values for this phase
doi:10.1016/S0364-5916(00)00005-5 Z.-K. Liu, Y.A. Chang, Calphad, 23, 339-56(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101649 C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.intermet.2014.01.015 Kazuya Shinagawa, Hibiki Chinen, Toshihiro Omori, Katsunari Oikawa, Ikuo Ohnuma, Kiyohito Ishida et al., Phase equilibria and thermodynamic calculation of the Co–Ta binary system, Intermetallics 49, 87-97 (2014).
assessment that models this phase; cited as the source of values for this phase
doi:10.1515/ijmr-2002-0196 K.C. Hari Kumar, T. Van Rompaey, P. Wollants, Z. Metallkd., 93, 1146-53(2002).
assessment that models this phase

C14_LAVES (Co–Ta)

Id: phase:co-ta:c14-laves; status assigned
Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type st:c14-mgzn2-hp12; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in CoTa-99Liu-LB.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 1403.36–1840 K, x(Ta) 0.36178–0.36323
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:co-ta:c14-laves
paper: paper:10.1016/s0364-5916(00)00005-5:C14
tdb: tdb:CoTa-99Liu-LB.tdb:C14_LAVES

TDB models of C14_LAVES (1): PHASE and CONSTITUENT statements as written

CoTa-99Liu-LB.tdb: C14_LAVES, type code %, sha256 2d4f912a1ca1b737…

45: PHASE C14_LAVES % 2 2 1  !
46: CONST C14_LAVES : CO% TA : CO TA% : !

Example references (1 of 1; assessments first):

doi:10.1016/S0364-5916(00)00005-5 Z.-K. Liu, Y.A. Chang, Calphad, 23, 339-56(1999).
assessment that models this phase; reports values for this phase

C15_LAVES (Co–Ta)

Id: phase:co-ta:c15-laves; status assigned
Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type st:c15-cu2mg-cf24; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in CoTa-02Har.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-99Liu-LB.tdb also describes the disordered state
Stability: stable in 2 of 2 calculated diagram(s): 300–1895.72 K, x(Ta) 0.28736–0.33892
Literature: 11 values (11 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:co-ta:c15-laves
paper: paper:10.1016/s0364-5916(00)00005-5:C15
tdb: tdb:CoTa-02Har.tdb:C15_LAVES, tdb:CoTa-99Liu-LB.tdb:C15_LAVES

TDB models of C15_LAVES (2): PHASE and CONSTITUENT statements as written

CoTa-02Har.tdb: C15_LAVES, type code %, sha256 c7251b1bb94512ab…

54: PHASE C15_LAVES % 2 2 1  !
55: CONST C15_LAVES : CO% TA : CO TA% : !

CoTa-99Liu-LB.tdb: C15_LAVES, type code %, sha256 2d4f912a1ca1b737…

50: PHASE C15_LAVES % 2 2 1  !
51: CONST C15_LAVES : CO% TA : CO TA% : !

Example references (2 of 2; assessments first):

doi:10.1016/S0364-5916(00)00005-5 Z.-K. Liu, Y.A. Chang, Calphad, 23, 339-56(1999).
assessment that models this phase; reports values for this phase
doi:10.1515/ijmr-2002-0196 K.C. Hari Kumar, T. Van Rompaey, P. Wollants, Z. Metallkd., 93, 1146-53(2002).
assessment that models this phase

C36_LAVES (Co–Ta)

Id: phase:co-ta:c36-laves; status assigned
Structure: MgNi2 · C36 · hP24 · P6_3/mmc (194); type st:c36-mgni2-hp24; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in CoTa-99Liu-LB.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–1727.19 K, x(Ta) 0.24578–0.27082
Literature: 9 values (9 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:co-ta:c36-laves
paper: paper:10.1016/s0364-5916(00)00005-5:C36
tdb: tdb:CoTa-99Liu-LB.tdb:C36_LAVES

TDB models of C36_LAVES (1): PHASE and CONSTITUENT statements as written

CoTa-99Liu-LB.tdb: C36_LAVES, type code %, sha256 2d4f912a1ca1b737…

55: PHASE C36_LAVES % 2 2 1  !
56: CONST C36_LAVES : CO% TA : CO TA% : !

Example references (1 of 1; assessments first):

doi:10.1016/S0364-5916(00)00005-5 Z.-K. Liu, Y.A. Chang, Calphad, 23, 339-56(1999).
assessment that models this phase; reports values for this phase

CO16TA9_C14 (Co–Ta)

Id: phase:co-ta:co16ta9-c14; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_C14; stoichiometry_contradicts_C14:CoTa-02Har.tdb
Candidate (name_token): MgZn2 · C14 · hP12 · P6_3/mmc (194) — Strukturbericht/word 'C14' in the TDB name
Candidate (sgte_mmc2): MgZn2 · C14 · hP12 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for CO16TA9_C14: Co16Ta9
Candidate (tdb_comment): MgZn2 · hP12 · P6_3/mmc — CoTa-02Har.tdb: 'Prototype MgZn2 (hP12, P6_3/mmc)'
Stoichiometry: Co 0.6400, Ta 0.3600
Stability: stable in 1 of 1 calculated diagram(s): 1320–1840 K, x(Ta) 0.36–0.36
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:co-ta:co16ta9-c14
tdb: tdb:CoTa-02Har.tdb:CO16TA9_C14

TDB models of CO16TA9_C14 (1): PHASE and CONSTITUENT statements as written

CoTa-02Har.tdb: CO16TA9_C14, type code %, sha256 c7251b1bb94512ab…

59: PHASE CO16TA9_C14 % 2 16 9  !
60: CONST CO16TA9_C14 : CO : TA : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2002-0196 K.C. Hari Kumar, T. Van Rompaey, P. Wollants, Z. Metallkd., 93, 1146-53(2002).
assessment that models this phase

CO2TA_C14 (Co–Ta)

Id: phase:co-ta:co2ta-c14; status assigned
Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type st:c14-mgzn2-hp12; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in CoTa-14Shi.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-19Wan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-19Zho.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-22Wan.tdb also describes the disordered state
Stability: stable in 4 of 4 calculated diagram(s): 1538.23–1864.11 K, x(Ta) 0.35991–0.37341
Literature: 16 values (16 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:co-ta:co2ta-c14
paper: paper:10.1016/j.intermet.2014.01.015:λ1 (C14), paper:10.1016/j.jallcom.2022.166723:λ1
tdb: tdb:CoTa-14Shi.tdb:CO2TA_C14, tdb:CoTa-19Wan.tdb:CO2TA_C14, tdb:CoTa-19Zho.tdb:CO2TA_C14, tdb:CoTa-22Wan.tdb:CO2TA_C14

TDB models of CO2TA_C14 (4): PHASE and CONSTITUENT statements as written

CoTa-14Shi.tdb: CO2TA_C14, type code %, sha256 e4d873cf93726ad0…

58: PHASE CO2TA_C14 % 2 2 1  !
59: CONST CO2TA_C14 : CO% TA : CO TA% : !

CoTa-19Wan.tdb: CO2TA_C14, type code %A, sha256 0188b050430162f4…

59: PHASE CO2TA_C14 %A 3 2 1 3 !
60: CONST CO2TA_C14 : CO TA : CO TA : CO TA : !

CoTa-19Zho.tdb: CO2TA_C14, type code %A, sha256 f38abf64bd567e76…

63: PHASE CO2TA_C14 %A 2 2 1 !
64: CONST CO2TA_C14 : CO% TA : CO TA% : !

CoTa-22Wan.tdb: CO2TA_C14, type code %, sha256 cab3db05a3994913…

51: PHASE CO2TA_C14 % 2 2 1  !
52: CONST CO2TA_C14 : CO% TA : CO TA% : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2022.166723 Cuiping Wang, Xiaodong Chen, Peng Yang, Qianqian Zhang, Shuiyuan Yang, Yong Lu et al., Experimental investigation and thermodynamic assessment of phase equilibria in the Al-Co-Ta ternary system, Journal of Alloys and Compounds 925, 166723 (2022).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2014.01.015 Kazuya Shinagawa, Hibiki Chinen, Toshihiro Omori, Katsunari Oikawa, Ikuo Ohnuma, Kiyohito Ishida et al., Phase equilibria and thermodynamic calculation of the Co–Ta binary system, Intermetallics 49, 87-97 (2014).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101649 C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.calphad.2018.12.002 Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019).
assessment that models this phase

CO2TA_C15 (Co–Ta)

Id: phase:co-ta:co2ta-c15; status assigned
Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type st:c15-cu2mg-cf24; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in CoTa-14Shi.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-19Wan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-19Zho.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-22Wan.tdb also describes the disordered state
Stability: stable in 4 of 4 calculated diagram(s): 300–1923.45 K, x(Ta) 0.25891–0.3451
Literature: 24 values (24 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:co-ta:co2ta-c15
paper: paper:10.1016/j.intermet.2014.01.015:λ2 (C15), paper:10.1016/j.jallcom.2022.166723:λ2
tdb: tdb:CoTa-14Shi.tdb:CO2TA_C15, tdb:CoTa-19Wan.tdb:CO2TA_C15, tdb:CoTa-19Zho.tdb:CO2TA_C15, tdb:CoTa-22Wan.tdb:CO2TA_C15

TDB models of CO2TA_C15 (4): PHASE and CONSTITUENT statements as written

CoTa-14Shi.tdb: CO2TA_C15, type code %, sha256 e4d873cf93726ad0…

63: PHASE CO2TA_C15 % 2 2 1  !
64: CONST CO2TA_C15 : CO% TA : CO TA% : !

CoTa-19Wan.tdb: CO2TA_C15, type code %A, sha256 0188b050430162f4…

64: PHASE CO2TA_C15 %A 2 2 1 !
65: CONST CO2TA_C15 : CO% TA : CO TA% : !

CoTa-19Zho.tdb: CO2TA_C15, type code %A, sha256 f38abf64bd567e76…

68: PHASE CO2TA_C15 %A 2 2 1 !
69: CONST CO2TA_C15 : CO% TA : CO TA% : !

CoTa-22Wan.tdb: CO2TA_C15, type code %, sha256 cab3db05a3994913…

56: PHASE CO2TA_C15 % 2 2 1  !
57: CONST CO2TA_C15 : CO% TA : CO TA% : !

Example references (5 of 5; assessments first):

doi:10.1016/j.jallcom.2022.166723 Cuiping Wang, Xiaodong Chen, Peng Yang, Qianqian Zhang, Shuiyuan Yang, Yong Lu et al., Experimental investigation and thermodynamic assessment of phase equilibria in the Al-Co-Ta ternary system, Journal of Alloys and Compounds 925, 166723 (2022).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2014.01.015 Kazuya Shinagawa, Hibiki Chinen, Toshihiro Omori, Katsunari Oikawa, Ikuo Ohnuma, Kiyohito Ishida et al., Phase equilibria and thermodynamic calculation of the Co–Ta binary system, Intermetallics 49, 87-97 (2014).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101649 C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.calphad.2018.12.002 Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019).
assessment that models this phase
doi:10.1016/s0364-5916(00)00005-5 Zi-Kui Liu, Y.Austin Chang, Thermodynamic assessment of the Co-Ta system, Calphad 23, 339-356 (1999).
cited as the source of values for this phase

CO2TA_C36 (Co–Ta)

Id: phase:co-ta:co2ta-c36; status assigned
Structure: MgNi2 · C36 · hP24 · P6_3/mmc (194); type st:c36-mgni2-hp24; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in CoTa-14Shi.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-19Wan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-19Zho.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-22Wan.tdb also describes the disordered state
Stability: stable in 4 of 4 calculated diagram(s): 1220.39–1850 K, x(Ta) 0.22511–0.2713
Literature: 21 values (21 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:co-ta:co2ta-c36
paper: paper:10.1016/j.intermet.2014.01.015:λ3 (C36), paper:10.1016/j.jallcom.2022.166723:λ3
tdb: tdb:CoTa-14Shi.tdb:CO2TA_C36, tdb:CoTa-19Wan.tdb:CO2TA_C36, tdb:CoTa-19Zho.tdb:CO2TA_C36, tdb:CoTa-22Wan.tdb:CO2TA_C36

TDB models of CO2TA_C36 (4): PHASE and CONSTITUENT statements as written

CoTa-14Shi.tdb: CO2TA_C36, type code %, sha256 e4d873cf93726ad0…

68: PHASE CO2TA_C36 % 2 2 1  !
69: CONST CO2TA_C36 : CO% TA : CO TA% : !

CoTa-19Wan.tdb: CO2TA_C36, type code %A, sha256 0188b050430162f4…

69: PHASE CO2TA_C36 %A 3 2 1 3 !
70: CONST CO2TA_C36 : CO TA : CO TA : CO TA : !

CoTa-19Zho.tdb: CO2TA_C36, type code %A, sha256 f38abf64bd567e76…

73: PHASE CO2TA_C36 %A 2 2 1 !
74: CONST CO2TA_C36 : CO% TA : CO TA% : !

CoTa-22Wan.tdb: CO2TA_C36, type code %, sha256 cab3db05a3994913…

61: PHASE CO2TA_C36 % 2 2 1  !
62: CONST CO2TA_C36 : CO% TA : CO TA% : !

Example references (5 of 5; assessments first):

doi:10.1016/j.jallcom.2022.166723 Cuiping Wang, Xiaodong Chen, Peng Yang, Qianqian Zhang, Shuiyuan Yang, Yong Lu et al., Experimental investigation and thermodynamic assessment of phase equilibria in the Al-Co-Ta ternary system, Journal of Alloys and Compounds 925, 166723 (2022).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2014.01.015 Kazuya Shinagawa, Hibiki Chinen, Toshihiro Omori, Katsunari Oikawa, Ikuo Ohnuma, Kiyohito Ishida et al., Phase equilibria and thermodynamic calculation of the Co–Ta binary system, Intermetallics 49, 87-97 (2014).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101649 C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.calphad.2018.12.002 Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019).
assessment that models this phase
doi:10.1016/s0364-5916(00)00005-5 Zi-Kui Liu, Y.Austin Chang, Thermodynamic assessment of the Co-Ta system, Calphad 23, 339-356 (1999).
cited as the source of values for this phase

CO3TA (Co–Ta)

Id: phase:co-ta:co3ta; status assigned
Structure: BaPb3 · hR12 · R-3m (166); type st:bapb3-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_structure_token, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
Stability: stable in 1 of 1 calculated diagram(s): 300–1320.39 K, x(Ta) 0.2363–0.25
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:co-ta:co3ta
tdb: tdb:CoTa-19Zho.tdb:CO3TA

TDB models of CO3TA (1): PHASE and CONSTITUENT statements as written

CoTa-19Zho.tdb: CO3TA, type code %, sha256 f38abf64bd567e76…

58: PHASE CO3TA % 2 3 1 !
59: CONST CO3TA : CO : CO TA% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2019.101649 C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17
assessment that models this phase

CO3TA_C36 (Co–Ta)

Id: phase:co-ta:co3ta-c36; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_C36; name_suggests_C36_but_dft_space_group_166; stoichiometry_contradicts_C36:CoTa-02Har.tdb
Candidate (dft_mp): R-3m (166) — on-hull MP TaCo3 at x(TA)=0.2500
Candidate (dft_oqmd): R-3m (166) — on-hull OQMD Co3 Ta1 at x(TA)=0.2500
Candidate (name_token): MgNi2 · C36 · hP24 · P6_3/mmc (194) — Strukturbericht/word 'C36' in the TDB name
Candidate (sgte_mmc2): MgNi2 · C36 · hP24 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for CO3TA_C36: Co3Ta
Candidate (tdb_comment): MgNi2 · hP24 · P6_3/mmc — CoTa-02Har.tdb: 'Prototype MgNi2 (hP24, P6_3/mmc)'
Stoichiometry: Co 0.7500, Ta 0.2500
Stability: stable in 1 of 1 calculated diagram(s): 300–1720.72 K, x(Ta) 0.25–0.25
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:co-ta:co3ta-c36
tdb: tdb:CoTa-02Har.tdb:CO3TA_C36

TDB models of CO3TA_C36 (1): PHASE and CONSTITUENT statements as written

CoTa-02Har.tdb: CO3TA_C36, type code %, sha256 c7251b1bb94512ab…

49: PHASE CO3TA_C36 % 2 3 1  !
50: CONST CO3TA_C36 : CO : TA : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2002-0196 K.C. Hari Kumar, T. Van Rompaey, P. Wollants, Z. Metallkd., 93, 1146-53(2002).
assessment that models this phase

CO7TA2 (Co–Ta)

Id: phase:co-ta:co7ta2; status assigned
Structure: BaPb3 · hR12 · R-3m (166); type st:bapb3-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 0.7778, Ta 0.2222
Stability: stable in 5 of 5 calculated diagram(s): 300–1316.43 K, x(Ta) 0.22222–0.22222
Literature: 16 values (16 accepted) from 3 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:co-ta:co7ta2
paper: paper:10.1016/j.intermet.2014.01.015:Co7Ta2, paper:10.1016/j.jallcom.2022.166723:Co7Ta2, paper:10.1016/s0364-5916(00)00005-5:Co7Ta2
tdb: tdb:CoTa-02Har.tdb:CO7TA2, tdb:CoTa-14Shi.tdb:CO7TA2, tdb:CoTa-19Wan.tdb:CO7TA2, tdb:CoTa-22Wan.tdb:CO7TA2, tdb:CoTa-99Liu-LB.tdb:CO7TA2

TDB models of CO7TA2 (5): PHASE and CONSTITUENT statements as written

CoTa-02Har.tdb: CO7TA2, type code %, sha256 c7251b1bb94512ab…

44: PHASE CO7TA2 % 2 7 2  !
45: CONST CO7TA2 : CO : TA : !

CoTa-14Shi.tdb: CO7TA2, type code %, sha256 e4d873cf93726ad0…

53: PHASE CO7TA2 % 2 7 2  !
54: CONST CO7TA2 : CO : TA : !

CoTa-19Wan.tdb: CO7TA2, type code %, sha256 0188b050430162f4…

54: PHASE CO7TA2 % 2 7 2 !
55: CONST CO7TA2 : CO : TA : !

CoTa-22Wan.tdb: CO7TA2, type code %, sha256 cab3db05a3994913…

46: PHASE CO7TA2 % 2 7 2  !
47: CONST CO7TA2 : CO : TA : !

CoTa-99Liu-LB.tdb: CO7TA2, type code %, sha256 2d4f912a1ca1b737…

40: PHASE CO7TA2 % 2 7 2  !
41: CONST CO7TA2 : CO : TA : !

Example references (6 of 6; assessments first):

doi:10.1016/j.jallcom.2022.166723 Cuiping Wang, Xiaodong Chen, Peng Yang, Qianqian Zhang, Shuiyuan Yang, Yong Lu et al., Experimental investigation and thermodynamic assessment of phase equilibria in the Al-Co-Ta ternary system, Journal of Alloys and Compounds 925, 166723 (2022).
assessment that models this phase; reports values for this phase
doi:10.1016/S0364-5916(00)00005-5 Z.-K. Liu, Y.A. Chang, Calphad, 23, 339-56(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2014.01.015 Kazuya Shinagawa, Hibiki Chinen, Toshihiro Omori, Katsunari Oikawa, Ikuo Ohnuma, Kiyohito Ishida et al., Phase equilibria and thermodynamic calculation of the Co–Ta binary system, Intermetallics 49, 87-97 (2014).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2018.12.002 Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019).
assessment that models this phase
doi:10.1515/ijmr-2002-0196 K.C. Hari Kumar, T. Van Rompaey, P. Wollants, Z. Metallkd., 93, 1146-53(2002).
assessment that models this phase
doi:10.1016/j.calphad.2019.101649 C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17
cited as the source of values for this phase

COTA2_C16 (Co–Ta)

Id: phase:co-ta:cota2-c16; status assigned
Structure: Al2Cu · C16 · tI12 · I4/mcm (140); type st:c16-al2cu-ti12; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in CoTa-14Shi.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-19Wan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-19Zho.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-22Wan.tdb also describes the disordered state
Stability: stable in 6 of 6 calculated diagram(s): 300–2225.5 K, x(Ta) 0.62275–0.68661
Literature: 19 values (19 accepted) from 3 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:co-ta:cota2-c16
paper: paper:10.1016/j.intermet.2014.01.015:CoTa2, paper:10.1016/j.jallcom.2022.166723:CoTa2, paper:10.1016/s0364-5916(00)00005-5:CoTa2
tdb: tdb:CoTa-02Har.tdb:COTA2_C16, tdb:CoTa-14Shi.tdb:COTA2_C16, tdb:CoTa-19Wan.tdb:COTA2_C16, tdb:CoTa-19Zho.tdb:COTA2_C16, tdb:CoTa-22Wan.tdb:COTA2_C16, tdb:CoTa-99Liu-LB.tdb:COTA2_C16

TDB models of COTA2_C16 (6): PHASE and CONSTITUENT statements as written

CoTa-02Har.tdb: COTA2_C16, type code %, sha256 c7251b1bb94512ab…

69: PHASE COTA2_C16 % 2 1 2  !
70: CONST COTA2_C16 : CO : TA : !

CoTa-14Shi.tdb: COTA2_C16, type code %, sha256 e4d873cf93726ad0…

78: PHASE COTA2_C16 % 2 1 2  !
79: CONST COTA2_C16 : CO% TA : CO TA% : !

CoTa-19Wan.tdb: COTA2_C16, type code %, sha256 0188b050430162f4…

84: PHASE COTA2_C16 % 2 1 2 !
85: CONST COTA2_C16 : CO% TA : CO TA% : !

CoTa-19Zho.tdb: COTA2_C16, type code %, sha256 f38abf64bd567e76…

83: PHASE COTA2_C16 % 2 1 2 !
84: CONST COTA2_C16 : CO% TA : CO TA% : !

CoTa-22Wan.tdb: COTA2_C16, type code %, sha256 cab3db05a3994913…

71: PHASE COTA2_C16 % 2 1 2  !
72: CONST COTA2_C16 : CO% TA : CO TA% : !

CoTa-99Liu-LB.tdb: COTA2_C16, type code %, sha256 2d4f912a1ca1b737…

65: PHASE COTA2_C16 % 2 1 2  !
66: CONST COTA2_C16 : CO : TA : !

Example references (6 of 6; assessments first):

doi:10.1016/j.jallcom.2022.166723 Cuiping Wang, Xiaodong Chen, Peng Yang, Qianqian Zhang, Shuiyuan Yang, Yong Lu et al., Experimental investigation and thermodynamic assessment of phase equilibria in the Al-Co-Ta ternary system, Journal of Alloys and Compounds 925, 166723 (2022).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2014.01.015 Kazuya Shinagawa, Hibiki Chinen, Toshihiro Omori, Katsunari Oikawa, Ikuo Ohnuma, Kiyohito Ishida et al., Phase equilibria and thermodynamic calculation of the Co–Ta binary system, Intermetallics 49, 87-97 (2014).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/S0364-5916(00)00005-5 Z.-K. Liu, Y.A. Chang, Calphad, 23, 339-56(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101649 C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.calphad.2018.12.002 Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019).
assessment that models this phase
doi:10.1515/ijmr-2002-0196 K.C. Hari Kumar, T. Van Rompaey, P. Wollants, Z. Metallkd., 93, 1146-53(2002).
assessment that models this phase

MU_D85 (Co–Ta)

Id: phase:co-ta:d85-mu; status assigned
Structure: Fe7W6 · D8_5 · hR13 · R-3m (166); type st:d8-5-fe7w6-hr13; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in CoTa-02Har.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-19Wan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-19Zho.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-22Wan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTa-99Liu-LB.tdb also describes the disordered state
Stability: stable in 6 of 6 calculated diagram(s): 300–2045.23 K, x(Ta) 0.44838–0.55701
Literature: 38 values (38 accepted) from 3 papers
Interactive: phase registry entry

Names (11): corpus: corpus:phase:co-ta:d85-mu, corpus:phase:co-ta:mu-d85
paper: paper:10.1016/j.intermet.2014.01.015:μ, paper:10.1016/j.jallcom.2022.166723:μ, paper:10.1016/s0364-5916(00)00005-5:μ
tdb: tdb:CoTa-02Har.tdb:MU_D85, tdb:CoTa-14Shi.tdb:MU_D85, tdb:CoTa-19Wan.tdb:MU_D85, tdb:CoTa-19Zho.tdb:MU_D85, tdb:CoTa-22Wan.tdb:MU_D85, tdb:CoTa-99Liu-LB.tdb:MU_D85

TDB models of MU_D85 (6): PHASE and CONSTITUENT statements as written

CoTa-02Har.tdb: MU_D85, type code %, sha256 c7251b1bb94512ab…

64: PHASE MU_D85 % 4 1 4 2 6 !
65: CONST MU_D85 : CO% TA : TA : CO TA% : CO : !

CoTa-14Shi.tdb: MU_D85, type code %, sha256 e4d873cf93726ad0…

73: PHASE MU_D85 % 3 6 4 3 !
74: CONST MU_D85 : CO : TA : CO TA : !

CoTa-19Wan.tdb: MU_D85, type code %AP, sha256 0188b050430162f4…

79: PHASE MU_D85 %AP 4 0.07692 0.30769 0.15385 0.46154 !
80: CONST MU_D85 : CO TA : CO TA : CO TA : CO TA : !

CoTa-19Zho.tdb: MU_D85, type code %, sha256 f38abf64bd567e76…

78: PHASE MU_D85 % 4 1 4 2 6 !
79: CONST MU_D85 : CO TA : TA : CO TA : CO TA : !

CoTa-22Wan.tdb: MU_D85, type code %, sha256 cab3db05a3994913…

66: PHASE MU_D85 % 4 1 4 2 6 !
67: CONST MU_D85 : TA : TA : CO TA : CO TA : !

CoTa-99Liu-LB.tdb: MU_D85, type code %, sha256 2d4f912a1ca1b737…

60: PHASE MU_D85 % 3 7 2 4 !
61: CONST MU_D85 : CO TA : TA : CO TA : !

Example references (6 of 6; assessments first):

doi:10.1016/j.intermet.2014.01.015 Kazuya Shinagawa, Hibiki Chinen, Toshihiro Omori, Katsunari Oikawa, Ikuo Ohnuma, Kiyohito Ishida et al., Phase equilibria and thermodynamic calculation of the Co–Ta binary system, Intermetallics 49, 87-97 (2014).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jallcom.2022.166723 Cuiping Wang, Xiaodong Chen, Peng Yang, Qianqian Zhang, Shuiyuan Yang, Yong Lu et al., Experimental investigation and thermodynamic assessment of phase equilibria in the Al-Co-Ta ternary system, Journal of Alloys and Compounds 925, 166723 (2022).
assessment that models this phase; reports values for this phase
doi:10.1016/S0364-5916(00)00005-5 Z.-K. Liu, Y.A. Chang, Calphad, 23, 339-56(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101649 C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.calphad.2018.12.002 Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019).
assessment that models this phase
doi:10.1515/ijmr-2002-0196 K.C. Hari Kumar, T. Van Rompaey, P. Wollants, Z. Metallkd., 93, 1146-53(2002).
assessment that models this phase

DIS_MU (Co–Ta)

Id: phase:co-ta:dis-mu; status needs_review
No structure assigned. Why: unrecognised_name_tokens:DIS
Candidate (name_token): Fe7W6 · D8_5 · hR13 · R-3m (166) — Strukturbericht/word 'D85' in the TDB name
Stability: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:co-ta:dis-mu
tdb: tdb:CoTa-19Wan.tdb:DIS_MU

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

CoTa-19Wan.tdb: DIS_MU, type code %A, sha256 0188b050430162f4…

74: PHASE DIS_MU %A 1 1 !
75: CONST DIS_MU : CO TA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2018.12.002 Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019).
assessment that models this phase

FCC_4SL (Co–Ta)

Id: phase:co-ta:fcc-4sl; status needs_review
No structure assigned. Why: order_disorder_ambiguity:CoTa-19Wan.tdb_model_is_partitioned; order_disorder_ambiguity:CoTa-19Zho.tdb_model_is_partitioned; unrecognised_name_tokens:4SL
Candidate (name_token): Cu · A1 · cF4 · Fm-3m (225) — Strukturbericht/word 'A1' in the TDB name
Candidate (tdb_comment): AuCu3 · cP4 · Pm-3m — CoTa-19Wan.tdb: 'Prototype AuCu3 (cP4, Pm-3m)'
Candidate (tdb_comment): AuCu3 · cP4 · Pm-3m — CoTa-19Zho.tdb: 'Prototype AuCu3 (cP4, Pm-3m)'
Stability: stable in 2 of 2 calculated diagram(s): 691.7–1769.38 K, x(Ta) 0–0.05936
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:co-ta:fcc-4sl
tdb: tdb:CoTa-19Wan.tdb:FCC_4SL, tdb:CoTa-19Zho.tdb:FCC_4SL

TDB models of FCC_4SL (2): PHASE and CONSTITUENT statements as written

CoTa-19Wan.tdb: FCC_4SL, type code %AY, sha256 0188b050430162f4…

39: PHASE FCC_4SL:F %AY 5 0.25 0.25 0.25 0.25 1 !
40: CONST FCC_4SL:F : CO% TA : CO% TA : CO% TA : CO TA% : VA :  !

CoTa-19Zho.tdb: FCC_4SL, type code %AY, sha256 f38abf64bd567e76…

43: PHASE FCC_4SL:F %AY 5 0.25 0.25 0.25 0.25 1 !
44: CONST FCC_4SL:F : CO% TA : CO% TA : CO% TA : CO TA% : VA :  !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2018.12.002 Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019).
assessment that models this phase
doi:10.1016/j.calphad.2019.101649 C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17
assessment that models this phase

FCC_A1 (Co–Ta)

Id: phase:co-ta: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 6 of 6 calculated diagram(s): 621.48–1777.64 K, x(Ta) 0–0.05936
Literature: 24 values (24 accepted) from 3 papers
Interactive: phase registry entry

Names (13): corpus: corpus:phase:co-ta:fcc-a1
paper: paper:10.1016/j.calphad.2018.12.002:FCC, paper:10.1016/j.jallcom.2022.166723:fcc, paper:10.1016/s0364-5916(00)00005-5:fcc
tdb: tdb:CoTa-02Har.tdb:FCC_A1, tdb:CoTa-14Shi.tdb:A1_FCC, tdb:CoTa-14Shi.tdb:FCC_A1, tdb:CoTa-19Wan.tdb:A1_FCC, tdb:CoTa-19Wan.tdb:FCC_A1, tdb:CoTa-19Zho.tdb:A1_FCC, tdb:CoTa-19Zho.tdb:FCC_A1, tdb:CoTa-22Wan.tdb:FCC_A1, tdb:CoTa-99Liu-LB.tdb:FCC_A1

TDB models of FCC_A1 (9): PHASE and CONSTITUENT statements as written

CoTa-02Har.tdb: FCC_A1, type code %A, sha256 c7251b1bb94512ab…

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

CoTa-14Shi.tdb: A1_FCC, type code %A, sha256 e4d873cf93726ad0…

33: PHASE A1_FCC %A 2 1 1 !
34: CONST A1_FCC : CO% TA : VA : !

CoTa-14Shi.tdb: FCC_A1, type code %A, sha256 e4d873cf93726ad0…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : CO% TA : VA : !

CoTa-19Wan.tdb: A1_FCC, type code %A, sha256 0188b050430162f4…

34: PHASE A1_FCC %A 2 1 1 !
35: CONST A1_FCC : CO% TA : VA : !

CoTa-19Wan.tdb: FCC_A1, type code %A, sha256 0188b050430162f4…

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

CoTa-19Zho.tdb: A1_FCC, type code %A, sha256 f38abf64bd567e76…

38: PHASE A1_FCC %A 2 1 1 !
39: CONST A1_FCC : CO% TA : VA : !

CoTa-19Zho.tdb: FCC_A1, type code %A, sha256 f38abf64bd567e76…

33: PHASE FCC_A1 %A 2 1 1 !
34: CONST FCC_A1 : CO% TA : VA : !

CoTa-22Wan.tdb: FCC_A1, type code %A, sha256 cab3db05a3994913…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : CO% TA : VA : !

CoTa-99Liu-LB.tdb: FCC_A1, type code %A, sha256 2d4f912a1ca1b737…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : CO% TA : VA : !

Example references (6 of 6; assessments first):

doi:10.1016/j.jallcom.2022.166723 Cuiping Wang, Xiaodong Chen, Peng Yang, Qianqian Zhang, Shuiyuan Yang, Yong Lu et al., Experimental investigation and thermodynamic assessment of phase equilibria in the Al-Co-Ta ternary system, Journal of Alloys and Compounds 925, 166723 (2022).
assessment that models this phase; reports values for this phase
doi:10.1016/S0364-5916(00)00005-5 Z.-K. Liu, Y.A. Chang, Calphad, 23, 339-56(1999).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2018.12.002 Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2014.01.015 Kazuya Shinagawa, Hibiki Chinen, Toshihiro Omori, Katsunari Oikawa, Ikuo Ohnuma, Kiyohito Ishida et al., Phase equilibria and thermodynamic calculation of the Co–Ta binary system, Intermetallics 49, 87-97 (2014).
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.calphad.2019.101649 C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17
assessment that models this phase; cited as the source of values for this phase
doi:10.1515/ijmr-2002-0196 K.C. Hari Kumar, T. Van Rompaey, P. Wollants, Z. Metallkd., 93, 1146-53(2002).
assessment that models this phase

L12_FCC (Co–Ta)

Id: phase:co-ta: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: CoTa-14Shi.tdb: ordered phase with disordered part A1_FCC (order/disorder model)
Caveat: partitioned order/disorder model in CoTa-14Shi.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 671.48–1773.65 K, x(Ta) 0–0.05927
Literature: 10 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:co-ta:fcc-l12, corpus:phase:co-ta:l12-fcc
paper: paper:10.1016/j.intermet.2014.01.015:γ, paper:10.1016/j.intermet.2014.01.015:γ (Co), paper:10.1016/j.intermet.2014.01.015:γ(Co)
tdb: tdb:CoTa-14Shi.tdb:L12_FCC

TDB models of L12_FCC (1): PHASE and CONSTITUENT statements as written

CoTa-14Shi.tdb: L12_FCC, type code %AY, sha256 e4d873cf93726ad0…

38: PHASE L12_FCC %AY 3 0.75 0.25 1 !
39: CONST L12_FCC : CO% TA : CO TA% : VA :  !

Example references (1 of 1; assessments first):

doi:10.1016/j.intermet.2014.01.015 Kazuya Shinagawa, Hibiki Chinen, Toshihiro Omori, Katsunari Oikawa, Ikuo Ohnuma, Kiyohito Ishida et al., Phase equilibria and thermodynamic calculation of the Co–Ta binary system, Intermetallics 49, 87-97 (2014).
assessment that models this phase; reports values for this phase

HCP_A3 (Co–Ta)

Id: phase:co-ta: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 6 of 6 calculated diagram(s): 300–729.98 K, x(Ta) 0–0.01216
Literature: 5 values (5 accepted) from 2 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:co-ta:hcp-a3
paper: paper:10.1016/j.calphad.2018.12.002:HCP, paper:10.1016/s0364-5916(00)00005-5:hcp
tdb: tdb:CoTa-02Har.tdb:HCP_A3, tdb:CoTa-14Shi.tdb:HCP_A3, tdb:CoTa-19Wan.tdb:HCP_A3, tdb:CoTa-19Zho.tdb:HCP_A3, tdb:CoTa-22Wan.tdb:HCP_A3, tdb:CoTa-99Liu-LB.tdb:HCP_A3

TDB models of HCP_A3 (6): PHASE and CONSTITUENT statements as written

CoTa-02Har.tdb: HCP_A3, type code %A, sha256 c7251b1bb94512ab…

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

CoTa-14Shi.tdb: HCP_A3, type code %A, sha256 e4d873cf93726ad0…

48: PHASE HCP_A3 %A 2 1 0.5 !
49: CONST HCP_A3 : CO% TA : VA : !

CoTa-19Wan.tdb: HCP_A3, type code %A, sha256 0188b050430162f4…

49: PHASE HCP_A3 %A 2 1 0.5 !
50: CONST HCP_A3 : CO% TA : VA : !

CoTa-19Zho.tdb: HCP_A3, type code %A, sha256 f38abf64bd567e76…

53: PHASE HCP_A3 %A 2 1 0.5 !
54: CONST HCP_A3 : CO% TA : VA : !

CoTa-22Wan.tdb: HCP_A3, type code %A, sha256 cab3db05a3994913…

41: PHASE HCP_A3 %A 2 1 0.5 !
42: CONST HCP_A3 : CO% TA : VA : !

CoTa-99Liu-LB.tdb: HCP_A3, type code %A, sha256 2d4f912a1ca1b737…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : CO% TA : VA : !

Example references (6 of 6; assessments first):

doi:10.1016/j.calphad.2018.12.002 Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019).
assessment that models this phase; reports values for this phase
doi:10.1016/S0364-5916(00)00005-5 Z.-K. Liu, Y.A. Chang, Calphad, 23, 339-56(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101649 C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17
assessment that models this phase
doi:10.1016/j.intermet.2014.01.015 Kazuya Shinagawa, Hibiki Chinen, Toshihiro Omori, Katsunari Oikawa, Ikuo Ohnuma, Kiyohito Ishida et al., Phase equilibria and thermodynamic calculation of the Co–Ta binary system, Intermetallics 49, 87-97 (2014).
assessment that models this phase
doi:10.1016/j.jallcom.2022.166723 Cuiping Wang, Xiaodong Chen, Peng Yang, Qianqian Zhang, Shuiyuan Yang, Yong Lu et al., Experimental investigation and thermodynamic assessment of phase equilibria in the Al-Co-Ta ternary system, Journal of Alloys and Compounds 925, 166723 (2022).
assessment that models this phase
doi:10.1515/ijmr-2002-0196 K.C. Hari Kumar, T. Van Rompaey, P. Wollants, Z. Metallkd., 93, 1146-53(2002).
assessment that models this phase

LIQUID (Co–Ta)

Id: phase:co-ta:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 6 of 6 calculated diagram(s): 1552.64–4000 K, x(Ta) 0–1
Literature: 54 values (54 accepted) from 3 papers
Interactive: phase registry entry

Names (11): corpus: corpus:phase:co-ta:liquid
paper: paper:10.1016/j.intermet.2014.01.015:liquid, paper:10.1016/j.jallcom.2022.166723:L, paper:10.1016/j.jallcom.2022.166723:Liquid, paper:10.1016/s0364-5916(00)00005-5:liquid
tdb: tdb:CoTa-02Har.tdb:LIQUID, tdb:CoTa-14Shi.tdb:LIQUID, tdb:CoTa-19Wan.tdb:LIQUID, tdb:CoTa-19Zho.tdb:LIQUID, tdb:CoTa-22Wan.tdb:LIQUID, tdb:CoTa-99Liu-LB.tdb:LIQUID

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

CoTa-02Har.tdb: LIQUID, type code %, sha256 c7251b1bb94512ab…

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

CoTa-14Shi.tdb: LIQUID, type code %, sha256 e4d873cf93726ad0…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : CO TA : !

CoTa-19Wan.tdb: LIQUID, type code %, sha256 0188b050430162f4…

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

CoTa-19Zho.tdb: LIQUID, type code %, sha256 f38abf64bd567e76…

28: PHASE LIQUID:L % 1 1 !
29: CONST LIQUID:L : CO TA : !

CoTa-22Wan.tdb: LIQUID, type code %, sha256 cab3db05a3994913…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : CO TA : !

CoTa-99Liu-LB.tdb: LIQUID, type code %, sha256 2d4f912a1ca1b737…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : CO TA : !

Example references (6 of 6; assessments first):

doi:10.1016/j.jallcom.2022.166723 Cuiping Wang, Xiaodong Chen, Peng Yang, Qianqian Zhang, Shuiyuan Yang, Yong Lu et al., Experimental investigation and thermodynamic assessment of phase equilibria in the Al-Co-Ta ternary system, Journal of Alloys and Compounds 925, 166723 (2022).
assessment that models this phase; reports values for this phase
doi:10.1016/S0364-5916(00)00005-5 Z.-K. Liu, Y.A. Chang, Calphad, 23, 339-56(1999).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.intermet.2014.01.015 Kazuya Shinagawa, Hibiki Chinen, Toshihiro Omori, Katsunari Oikawa, Ikuo Ohnuma, Kiyohito Ishida et al., Phase equilibria and thermodynamic calculation of the Co–Ta binary system, Intermetallics 49, 87-97 (2014).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101649 C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.calphad.2018.12.002 Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019).
assessment that models this phase
doi:10.1515/ijmr-2002-0196 K.C. Hari Kumar, T. Van Rompaey, P. Wollants, Z. Metallkd., 93, 1146-53(2002).
assessment that models 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}
}