Fe–Ta phases

7 phases (tier A 5, liquid 1, needs_review 1); 5 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 · Fe–Ta system page · Markdown · field reference

Phases of the Fe–Ta system (7)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:fe-ta:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–3999.95 K, x(Ta) 0–1	63	3
C14_LAVES phase:fe-ta:c14-laves	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–2136.48 K, x(Ta) 0.26945–0.42799	83	3
MU_D85 phase:fe-ta:d85-mu	Fe7W6 · D8_5 · hR13 · R-3m (166)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–2064.99 K, x(Ta) 0.46154–0.61526	49	3
FCC_A1 phase:fe-ta:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 777.33–1742.46 K, x(Ta) 0–0.01061	38	3
FE2TA3 phase:fe-ta:fe2ta3		needs_review	not stable in 1 calculated diagram(s)	3	1
HCP_A3 phase:fe-ta:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 3 calculated diagram(s)	0	3
LIQUID phase:fe-ta:liquid	liquid	liquid	stable in 3 of 3 calculated diagram(s): 1716.11–4000 K, x(Ta) 0–1	58	3

BCC_A2 (Fe–Ta)

Id: phase:fe-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 3 of 3 calculated diagram(s): 300–3999.95 K, x(Ta) 0–1
Literature: 63 values (63 accepted) from 3 papers
Interactive: phase registry entry

Names (13): corpus: corpus:phase:fe-ta:bcc-a2
paper: paper:10.1016/j.calphad.2014.12.006:(Ta), paper:10.1016/j.calphad.2014.12.006:(αFe), paper:10.1016/j.calphad.2014.12.006:(δFe), paper:10.1016/j.intermet.2011.03.018:α, paper:10.1016/j.intermet.2011.03.018:δ, paper:10.1016/s0022-3115(03)00196-x:bcc, paper:10.1016/s0022-3115(03)00196-x:bcc(α), paper:10.1016/s0022-3115(03)00196-x:bcc(δ), paper:10.1016/s0022-3115(03)00196-x:α
tdb: tdb:FeTa-03Dan.tdb:BCC_A2, tdb:FeTa-11Wit.tdb:BCC_A2, tdb:FeTa-15Raj.tdb:BCC_A2

TDB models of BCC_A2 (3): PHASE and CONSTITUENT statements as written

FeTa-03Dan.tdb: BCC_A2, type code %B, sha256 e83eaadd3887295a…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : FE% TA% : VA : !

FeTa-11Wit.tdb: BCC_A2, type code %B, sha256 9f4e7036b7ede195…

38: PHASE BCC_A2 %B 2 1 3 !
39: CONST BCC_A2 : FE% TA% : VA : !

FeTa-15Raj.tdb: BCC_A2, type code %B, sha256 04b06f96f96efcaa…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : FE% TA% : VA : !

Example references (8 of 8; assessments first):

doi:10.1016/j.intermet.2011.03.018 V.T. Witusiewicz, A.A. Bondar, U. Hecht, V.M. Voblikov, O.S. Fomichov, V.M. Petyukh et al., Experimental study and thermodynamic re-assessment of the binary Fe–Ta system, Intermetallics 19, 1059-1075 (2011).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2014.12.006 V.B. Rajkumar, K.C. Hari Kumar, Gibbs energy modeling of Fe–Ta system by Calphad method assisted by experiments and ab initio calculations, Calphad 48, 157-165 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/S0022-3115(03)00196-X A. Danon, C. Servant, J. Nucl. Mater., 321, 8-18(2003).
assessment that models this phase; reports values for this phase
doi:10.1016/0925-8388(94)90747-1 S. Srikanth, A. Petric, Optimization and calculation of the FeTa phase diagram, Journal of Alloys and Compounds 203, 281-288 (1994).
cited as the source of values for this phase
doi:10.1002/srin.197001633 Wilhelm Anton Fischer, Klaus Lorenz, Heinz Fabritius, Dieter Schlegel, Untersuchung der α/γ‐Umwandlung in hochreinen Zweistofflegierungen des Eisens mit Molybdän, Vanadin, Wolfram, Niob, Tantal, Zirkon und Kobalt, Steel Research Intl 41, 489-498 (1970).
cited as the source of values for this phase
doi:10.1016/s0921-5093(02)00632-9 A Danon, C Servant, A Alamo, J.C Brachet, Heterogeneous austenite grain growth in 9Cr martensitic steels: influence of the heating rate and the austenitization temperature, Materials Science and Engineering: A 348, 122-132 (2003).
cited as the source of values for this phase
doi:10.1007/bf02664849 G. C. Coelho, J. G. Costa Neto, S. Gama, C. A. Ribeiro, Experimental study of the iron-tantalum equilibrium diagram, JPE 16, 121-128 (1995).
cited as the source of values for this phase
doi:10.2355/isijinternational.29.843 Eiji Ichise, Ken-ichi Horikawa, Thermodynamic study of Fe-Ta and Fe-Nb alloys by means of the Knudsen cell mass spectrometry., ISIJ International 29, 843-851 (1989).
cited as the source of values for this phase

C14_LAVES (Fe–Ta)

Id: phase:fe-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 FeTa-03Dan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in FeTa-11Wit.tdb also describes the disordered state
Caveat: partitioned order/disorder model in FeTa-15Raj.tdb also describes the disordered state
Stability: stable in 3 of 3 calculated diagram(s): 300–2136.48 K, x(Ta) 0.26945–0.42799
Literature: 83 values (83 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:fe-ta:c14-laves
paper: paper:10.1016/j.calphad.2014.12.006:ε, paper:10.1016/j.intermet.2011.03.018:λ, paper:10.1016/s0022-3115(03)00196-x:ε
system_alias: system_alias:fe-ta:epsilon
tdb: tdb:FeTa-03Dan.tdb:C14_LAVES, tdb:FeTa-11Wit.tdb:C14_LAVES, tdb:FeTa-15Raj.tdb:C14_LAVES

TDB models of C14_LAVES (3): PHASE and CONSTITUENT statements as written

FeTa-03Dan.tdb: C14_LAVES, type code %, sha256 e83eaadd3887295a…

43: PHASE C14_LAVES % 2 2 1 !
44: CONST C14_LAVES : FE% TA : FE TA% : !

FeTa-11Wit.tdb: C14_LAVES, type code %, sha256 9f4e7036b7ede195…

48: PHASE C14_LAVES % 2 2 1 !
49: CONST C14_LAVES : FE% TA : FE TA% : !

FeTa-15Raj.tdb: C14_LAVES, type code %, sha256 04b06f96f96efcaa…

43: PHASE C14_LAVES % 2 2 1 !
44: CONST C14_LAVES : FE% TA : FE TA% : !

Example references (9 of 9; assessments first):

doi:10.1016/j.intermet.2011.03.018 V.T. Witusiewicz, A.A. Bondar, U. Hecht, V.M. Voblikov, O.S. Fomichov, V.M. Petyukh et al., Experimental study and thermodynamic re-assessment of the binary Fe–Ta system, Intermetallics 19, 1059-1075 (2011).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2014.12.006 V.B. Rajkumar, K.C. Hari Kumar, Gibbs energy modeling of Fe–Ta system by Calphad method assisted by experiments and ab initio calculations, Calphad 48, 157-165 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/S0022-3115(03)00196-X A. Danon, C. Servant, J. Nucl. Mater., 321, 8-18(2003).
assessment that models this phase; reports values for this phase
doi:10.1016/0925-8388(94)90747-1 S. Srikanth, A. Petric, Optimization and calculation of the FeTa phase diagram, Journal of Alloys and Compounds 203, 281-288 (1994).
cited as the source of values for this phase
doi:10.1002/srin.197001633 Wilhelm Anton Fischer, Klaus Lorenz, Heinz Fabritius, Dieter Schlegel, Untersuchung der α/γ‐Umwandlung in hochreinen Zweistofflegierungen des Eisens mit Molybdän, Vanadin, Wolfram, Niob, Tantal, Zirkon und Kobalt, Steel Research Intl 41, 489-498 (1970).
cited as the source of values for this phase
doi:10.1016/s0921-5093(02)00632-9 A Danon, C Servant, A Alamo, J.C Brachet, Heterogeneous austenite grain growth in 9Cr martensitic steels: influence of the heating rate and the austenitization temperature, Materials Science and Engineering: A 348, 122-132 (2003).
cited as the source of values for this phase
doi:10.2355/isijinternational.29.843 Eiji Ichise, Ken-ichi Horikawa, Thermodynamic study of Fe-Ta and Fe-Nb alloys by means of the Knudsen cell mass spectrometry., ISIJ International 29, 843-851 (1989).
cited as the source of values for this phase
doi:10.1016/0022-5088(70)90137-2 G.B. Barbi, Determination of thermodynamic stability of the Fe2Ta intermetallic phase by non-stationary e.m.f. measurements on solid galvanic chains, Journal of the Less Common Metals 22, 487-494 (1970).
cited as the source of values for this phase
doi:10.1002/pssb.19680270149 K. Wetzig, Some Investigations Concerning the Position and the Melting Point of TaFe Lamellas in the System TaFe‐TaFe2, Physica Status Solidi (b) 27 (1968).
cited as the source of values for this phase

MU_D85 (Fe–Ta)

Id: phase:fe-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 FeTa-03Dan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in FeTa-11Wit.tdb also describes the disordered state
Caveat: partitioned order/disorder model in FeTa-15Raj.tdb also describes the disordered state
Stability: stable in 3 of 3 calculated diagram(s): 300–2064.99 K, x(Ta) 0.46154–0.61526
Literature: 49 values (49 accepted) from 3 papers
Interactive: phase registry entry

Names (11): corpus: corpus:phase:fe-ta:d85-mu, corpus:phase:fe-ta:mu-d85
paper: paper:10.1016/j.calphad.2014.12.006:Mu phase (μ), paper:10.1016/j.calphad.2014.12.006:μ, paper:10.1016/j.intermet.2011.03.018:μ, paper:10.1016/j.intermet.2011.03.018:μ, TaFe, Ta6Fe7, paper:10.1016/s0022-3115(03)00196-x:μ, paper:10.1016/s0022-3115(03)00196-x:μ ↔ Liq.
tdb: tdb:FeTa-03Dan.tdb:MU_D85, tdb:FeTa-11Wit.tdb:MU_D85, tdb:FeTa-15Raj.tdb:MU_D85

TDB models of MU_D85 (3): PHASE and CONSTITUENT statements as written

FeTa-03Dan.tdb: MU_D85, type code %, sha256 e83eaadd3887295a…

48: PHASE MU_D85 % 3 7 2 4 !
49: CONST MU_D85 : FE% TA : TA : FE TA% : !

FeTa-11Wit.tdb: MU_D85, type code %, sha256 9f4e7036b7ede195…

53: PHASE MU_D85 % 3 7 2 4 !
54: CONST MU_D85 : FE% TA : TA : FE TA% : !

FeTa-15Raj.tdb: MU_D85, type code %, sha256 04b06f96f96efcaa…

48: PHASE MU_D85 % 4 1 4 2 6 !
49: CONST MU_D85 : FE% TA : TA : FE TA% : FE% TA : !

Example references (8 of 8; assessments first):

doi:10.1016/j.intermet.2011.03.018 V.T. Witusiewicz, A.A. Bondar, U. Hecht, V.M. Voblikov, O.S. Fomichov, V.M. Petyukh et al., Experimental study and thermodynamic re-assessment of the binary Fe–Ta system, Intermetallics 19, 1059-1075 (2011).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2014.12.006 V.B. Rajkumar, K.C. Hari Kumar, Gibbs energy modeling of Fe–Ta system by Calphad method assisted by experiments and ab initio calculations, Calphad 48, 157-165 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/S0022-3115(03)00196-X A. Danon, C. Servant, J. Nucl. Mater., 321, 8-18(2003).
assessment that models this phase; reports values for this phase
doi:10.1016/0925-8388(94)90747-1 S. Srikanth, A. Petric, Optimization and calculation of the FeTa phase diagram, Journal of Alloys and Compounds 203, 281-288 (1994).
cited as the source of values for this phase
doi:10.1007/bf02664849 G. C. Coelho, J. G. Costa Neto, S. Gama, C. A. Ribeiro, Experimental study of the iron-tantalum equilibrium diagram, JPE 16, 121-128 (1995).
cited as the source of values for this phase
doi:10.1002/pssb.19680270149 K. Wetzig, Some Investigations Concerning the Position and the Melting Point of TaFe Lamellas in the System TaFe‐TaFe2, Physica Status Solidi (b) 27 (1968).
cited as the source of values for this phase
doi:10.1016/s0921-5093(02)00632-9 A Danon, C Servant, A Alamo, J.C Brachet, Heterogeneous austenite grain growth in 9Cr martensitic steels: influence of the heating rate and the austenitization temperature, Materials Science and Engineering: A 348, 122-132 (2003).
cited as the source of values for this phase
doi:10.2355/isijinternational.29.843 Eiji Ichise, Ken-ichi Horikawa, Thermodynamic study of Fe-Ta and Fe-Nb alloys by means of the Knudsen cell mass spectrometry., ISIJ International 29, 843-851 (1989).
cited as the source of values for this phase

FCC_A1 (Fe–Ta)

Id: phase:fe-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 3 of 3 calculated diagram(s): 777.33–1742.46 K, x(Ta) 0–0.01061
Literature: 38 values (38 accepted) from 3 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:fe-ta:fcc-a1
paper: paper:10.1016/j.calphad.2014.12.006:(γFe), paper:10.1016/j.intermet.2011.03.018:γ, paper:10.1016/s0022-3115(03)00196-x:γ
tdb: tdb:FeTa-03Dan.tdb:FCC_A1, tdb:FeTa-11Wit.tdb:FCC_A1, tdb:FeTa-15Raj.tdb:FCC_A1

TDB models of FCC_A1 (3): PHASE and CONSTITUENT statements as written

FeTa-03Dan.tdb: FCC_A1, type code %A, sha256 e83eaadd3887295a…

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

FeTa-11Wit.tdb: FCC_A1, type code %A, sha256 9f4e7036b7ede195…

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

FeTa-15Raj.tdb: FCC_A1, type code %A, sha256 04b06f96f96efcaa…

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

Example references (6 of 6; assessments first):

doi:10.1016/j.intermet.2011.03.018 V.T. Witusiewicz, A.A. Bondar, U. Hecht, V.M. Voblikov, O.S. Fomichov, V.M. Petyukh et al., Experimental study and thermodynamic re-assessment of the binary Fe–Ta system, Intermetallics 19, 1059-1075 (2011).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/S0022-3115(03)00196-X A. Danon, C. Servant, J. Nucl. Mater., 321, 8-18(2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2014.12.006 V.B. Rajkumar, K.C. Hari Kumar, Gibbs energy modeling of Fe–Ta system by Calphad method assisted by experiments and ab initio calculations, Calphad 48, 157-165 (2015).
assessment that models this phase; reports values for this phase
doi:10.1002/srin.197001633 Wilhelm Anton Fischer, Klaus Lorenz, Heinz Fabritius, Dieter Schlegel, Untersuchung der α/γ‐Umwandlung in hochreinen Zweistofflegierungen des Eisens mit Molybdän, Vanadin, Wolfram, Niob, Tantal, Zirkon und Kobalt, Steel Research Intl 41, 489-498 (1970).
cited as the source of values for this phase
doi:10.1016/0925-8388(94)90747-1 S. Srikanth, A. Petric, Optimization and calculation of the FeTa phase diagram, Journal of Alloys and Compounds 203, 281-288 (1994).
cited as the source of values for this phase
doi:10.1016/s0921-5093(02)00632-9 A Danon, C Servant, A Alamo, J.C Brachet, Heterogeneous austenite grain growth in 9Cr martensitic steels: influence of the heating rate and the austenitization temperature, Materials Science and Engineering: A 348, 122-132 (2003).
cited as the source of values for this phase

FE2TA3 (Fe–Ta)

Id: phase:fe-ta:fe2ta3; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model; sgte_mmc2_row_incomplete
Candidate (literature_printed): (Fe2Ta3) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (Fe2Ta3) — Hallstedt 2025 mmc2 row for FE2TA3: Fe2Ta3 (metastable)
Stability: not stable in 1 calculated diagram(s)
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:fe-ta:fe2ta3
paper: paper:10.1016/j.intermet.2011.03.018:Ta3Fe2
tdb: tdb:FeTa-11Wit.tdb:FE2TA3

TDB models of FE2TA3 (1): PHASE and CONSTITUENT statements as written

FeTa-11Wit.tdb: FE2TA3, type code %, sha256 9f4e7036b7ede195…

58: PHASE FE2TA3 % 2 2 3 !
59: CONST FE2TA3 : FE% TA : FE TA% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.intermet.2011.03.018 V.T. Witusiewicz, A.A. Bondar, U. Hecht, V.M. Voblikov, O.S. Fomichov, V.M. Petyukh et al., Experimental study and thermodynamic re-assessment of the binary Fe–Ta system, Intermetallics 19, 1059-1075 (2011).
assessment that models this phase; reports values for this phase

HCP_A3 (Fe–Ta)

Id: phase:fe-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: not stable in 3 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:fe-ta:hcp-a3
tdb: tdb:FeTa-03Dan.tdb:HCP_A3, tdb:FeTa-11Wit.tdb:HCP_A3, tdb:FeTa-15Raj.tdb:HCP_A3

TDB models of HCP_A3 (3): PHASE and CONSTITUENT statements as written

FeTa-03Dan.tdb: HCP_A3, type code %A, sha256 e83eaadd3887295a…

38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : FE TA : VA : !

FeTa-11Wit.tdb: HCP_A3, type code %A, sha256 9f4e7036b7ede195…

43: PHASE HCP_A3 %A 2 1 0.5 !
44: CONST HCP_A3 : FE TA : VA : !

FeTa-15Raj.tdb: HCP_A3, type code %A, sha256 04b06f96f96efcaa…

38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : FE TA : VA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2014.12.006 V.B. Rajkumar, K.C. Hari Kumar, Gibbs energy modeling of Fe–Ta system by Calphad method assisted by experiments and ab initio calculations, Calphad 48, 157-165 (2015).
assessment that models this phase
doi:10.1016/j.intermet.2011.03.018 V.T. Witusiewicz, A.A. Bondar, U. Hecht, V.M. Voblikov, O.S. Fomichov, V.M. Petyukh et al., Experimental study and thermodynamic re-assessment of the binary Fe–Ta system, Intermetallics 19, 1059-1075 (2011).
assessment that models this phase
doi:10.1016/S0022-3115(03)00196-X A. Danon, C. Servant, J. Nucl. Mater., 321, 8-18(2003).
assessment that models this phase

LIQUID (Fe–Ta)

Id: phase:fe-ta:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 1716.11–4000 K, x(Ta) 0–1
Literature: 58 values (58 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:fe-ta:liquid
paper: paper:10.1016/j.calphad.2014.12.006:L, paper:10.1016/j.intermet.2011.03.018:L, paper:10.1016/s0022-3115(03)00196-x:L, paper:10.1016/s0022-3115(03)00196-x:Liq.
tdb: tdb:FeTa-03Dan.tdb:LIQUID, tdb:FeTa-11Wit.tdb:LIQUID, tdb:FeTa-15Raj.tdb:LIQUID

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

FeTa-03Dan.tdb: LIQUID, type code %, sha256 e83eaadd3887295a…

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

FeTa-11Wit.tdb: LIQUID, type code %, sha256 9f4e7036b7ede195…

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

FeTa-15Raj.tdb: LIQUID, type code %, sha256 04b06f96f96efcaa…

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

Example references (8 of 8; assessments first):

doi:10.1016/j.intermet.2011.03.018 V.T. Witusiewicz, A.A. Bondar, U. Hecht, V.M. Voblikov, O.S. Fomichov, V.M. Petyukh et al., Experimental study and thermodynamic re-assessment of the binary Fe–Ta system, Intermetallics 19, 1059-1075 (2011).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/S0022-3115(03)00196-X A. Danon, C. Servant, J. Nucl. Mater., 321, 8-18(2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2014.12.006 V.B. Rajkumar, K.C. Hari Kumar, Gibbs energy modeling of Fe–Ta system by Calphad method assisted by experiments and ab initio calculations, Calphad 48, 157-165 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/0925-8388(94)90747-1 S. Srikanth, A. Petric, Optimization and calculation of the FeTa phase diagram, Journal of Alloys and Compounds 203, 281-288 (1994).
cited as the source of values for this phase
doi:10.2355/isijinternational.29.843 Eiji Ichise, Ken-ichi Horikawa, Thermodynamic study of Fe-Ta and Fe-Nb alloys by means of the Knudsen cell mass spectrometry., ISIJ International 29, 843-851 (1989).
cited as the source of values for this phase
doi:10.1007/bf02664849 G. C. Coelho, J. G. Costa Neto, S. Gama, C. A. Ribeiro, Experimental study of the iron-tantalum equilibrium diagram, JPE 16, 121-128 (1995).
cited as the source of values for this phase
doi:10.1016/s0921-5093(02)00632-9 A Danon, C Servant, A Alamo, J.C Brachet, Heterogeneous austenite grain growth in 9Cr martensitic steels: influence of the heating rate and the austenitization temperature, Materials Science and Engineering: A 348, 122-132 (2003).
cited as the source of values for this phase
doi:10.1002/pssb.19680270149 K. Wetzig, Some Investigations Concerning the Position and the Melting Point of TaFe Lamellas in the System TaFe‐TaFe2, Physica Status Solidi (b) 27 (1968).
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}
}