Al–Ta phases

14 phases (tier A 5, tier C 2, liquid 1, needs_review 4, unresolved_no_candidates 2); 13 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: interactive registry · full JSON · Al–Ta system page · Markdown · field reference

Phases of the Al–Ta system (14)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
AL2TA phase:al-ta:al2ta		unresolved_no_candidates	stable in 1 of 1 calculated diagram(s): 300–1867.6 K, x(Ta) 0.35–0.35	0	1
AL38TA48 phase:al-ta:al38ta48	Al38Ta48 · mP86 · P2_1/c (14)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1900 K, x(Ta) 0.5215–0.57235	10	1
AL3TA_D022 phase:al-ta:al3ta-d022	Al3Ti · D0_22 · tI8 · I4/mmm (139)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1901.76 K, x(Ta) 0.24005–0.25	33	4
AL3TA2 phase:al-ta:al3ta2		needs_review	stable in 1 of 1 calculated diagram(s): 300–1498.65 K, x(Ta) 0.4–0.4	5	1
AL3TA2_H phase:al-ta:al3ta2-h		needs_review	stable in 1 of 1 calculated diagram(s): 1498.13–1835.3 K, x(Ta) 0.4–0.4	0	1
AL3TA2_L phase:al-ta:al3ta2-l		unresolved_no_candidates	stable in 1 of 1 calculated diagram(s): 300–1498.13 K, x(Ta) 0.4–0.4	0	1
AL69TA39 phase:al-ta:al69ta39	Al69Ta39 · cF444 · F-43m (216)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 1371.45–1884.72 K, x(Ta) 0.35489–0.37818	23	2
AL7TA5 phase:al-ta:al7ta5		needs_review	stable in 1 of 1 calculated diagram(s): 300–1618.38 K, x(Ta) 0.41667–0.41667	4	1
ALTA phase:al-ta:alta		needs_review	stable in 2 of 2 calculated diagram(s): 300–2037.05 K, x(Ta) 0.5–0.51515	4	2
BCC_A2 phase:al-ta:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–3999.99 K, x(Ta) 0.87743–1	5	4
SIGMA_D8B phase:al-ta:d8b-sigma	sigma-CrFe · D8_b · tP30 · P4_2/mnm (136)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–2378.58 K, x(Ta) 0.50945–0.85074	56	4
FCC_A1 phase:al-ta:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–935.02 K, x(Ta) 0–0.00252	7	4
HCP_A3 phase:al-ta:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 4 calculated diagram(s)	0	4
LIQUID phase:al-ta:liquid	liquid	liquid	stable in 4 of 4 calculated diagram(s): 929.7–4000 K, x(Ta) 0–1	36	4

AL2TA (Al–Ta)

Id: phase:al-ta:al2ta; status unresolved_no_candidates
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token
Stoichiometry: Al 0.6500, Ta 0.3500
Stability: stable in 1 of 1 calculated diagram(s): 300–1867.6 K, x(Ta) 0.35–0.35
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-ta:al2ta
tdb: tdb:AlTa-90Kat.tdb:AL2TA

TDB models of AL2TA (1): PHASE and CONSTITUENT statements as written

AlTa-90Kat.tdb: AL2TA, type code %, sha256 a4157073c1d594d6…

47: PHASE AL2TA %  2 0.35 0.65 !
48: CONST AL2TA : TA : AL : !

AL38TA48 (Al–Ta)

Id: phase:al-ta:al38ta48; status assigned
Structure: Al38Ta48 · mP86 · P2_1/c (14); type st:al38ta48-mp86; 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): 300–1900 K, x(Ta) 0.5215–0.57235
Literature: 10 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:al-ta:al38ta48
paper: paper:10.1016/j.intermet.2009.06.015:φ
tdb: tdb:AlTa-10Wit.tdb:AL38TA48

TDB models of AL38TA48 (1): PHASE and CONSTITUENT statements as written

AlTa-10Wit.tdb: AL38TA48, type code %, sha256 667ded9a7ea8878f…

58: PHASE AL38TA48 % 2 38 48 !
59: CONST AL38TA48 : AL% TA : AL TA% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.intermet.2009.06.015 V.T. Witusiewicz, A.A. Bondar, U. Hecht, J. Zollinger, V.M. Petyukh, O.S. Fomichov et al., Experimental study and thermodynamic re-assessment of the binary Al–Ta system, Intermetallics 18, 92-106 (2010).
assessment that models this phase; reports values for this phase

AL3TA_D022 (Al–Ta)

Id: phase:al-ta:al3ta-d022; status assigned
Structure: Al3Ti · D0_22 · tI8 · I4/mmm (139); type st:d0-22-al3ti-ti8; tier A: standard phase name; confidence high
Stability: stable in 4 of 4 calculated diagram(s): 300–1901.76 K, x(Ta) 0.24005–0.25
Literature: 33 values (32 accepted) from 3 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:al-ta:al3ta-d022
paper: paper:10.1007/bf02665557:Al3Ta, paper:10.1016/j.intermet.2009.06.015:ε, paper:sha256-85fd53a1a176b694:Al3Ta*, paper:sha256-85fd53a1a176b694:AlM-D0*22
system_alias: system_alias:al-ta:epsilon
tdb: tdb:AlTa-10Wit.tdb:AL3TA_D022, tdb:AlTa-90Kat.tdb:AL3TA_D022, tdb:AlTa-96Du-LB.tdb:AL3TA_D022, tdb:AlTa-98Sau.tdb:AL3TA_D022

TDB models of AL3TA_D022 (4): PHASE and CONSTITUENT statements as written

AlTa-10Wit.tdb: AL3TA_D022, type code %, sha256 667ded9a7ea8878f…

48: PHASE AL3TA_D022 % 2 3 1 !
49: CONST AL3TA_D022 : AL : AL TA% : !

AlTa-90Kat.tdb: AL3TA_D022, type code %, sha256 a4157073c1d594d6…

52: PHASE AL3TA_D022 %  2 0.25 0.75 !
53: CONST AL3TA_D022 : TA : AL : !

AlTa-96Du-LB.tdb: AL3TA_D022, type code %, sha256 db1782b402270c14…

67: PHASE AL3TA_D022 % 2 0.75 0.25 !
68: CONST AL3TA_D022 : AL : TA : !

AlTa-98Sau.tdb: AL3TA_D022, type code %, sha256 790811d9dcc140fc…

46: PHASE AL3TA_D022 %  2 0.25 0.75 !
47: CONST AL3TA_D022 : TA : AL : !

Example references (2 of 2; assessments first):

doi:10.1016/j.intermet.2009.06.015 V.T. Witusiewicz, A.A. Bondar, U. Hecht, J. Zollinger, V.M. Petyukh, O.S. Fomichov et al., Experimental study and thermodynamic re-assessment of the binary Al–Ta system, Intermetallics 18, 92-106 (2010).
assessment that models this phase; reports values for this phase
doi:10.1007/BF02665557 Y. Du, R. Schmid-Fetzer, J. Phase Equilib., 17, 311-324(1996).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase

AL3TA2 (Al–Ta)

Id: phase:al-ta:al3ta2; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition; sgte_mmc2_row_incomplete
Candidate (literature_printed): (Al3Ta2) · aP* ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (Al3Ta2) — Hallstedt 2025 mmc2 row for AL3TA2: Al3Ta2
Stoichiometry: Al 0.6000, Ta 0.4000
Stability: stable in 1 of 1 calculated diagram(s): 300–1498.65 K, x(Ta) 0.4–0.4
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:al-ta:al3ta2
paper: paper:10.1007/bf02665557:Al3Ta2
tdb: tdb:AlTa-96Du-LB.tdb:AL3TA2

TDB models of AL3TA2 (1): PHASE and CONSTITUENT statements as written

AlTa-96Du-LB.tdb: AL3TA2, type code %, sha256 db1782b402270c14…

47: PHASE AL3TA2 %  2 0.6 0.4 !
48: CONST AL3TA2 : AL : TA : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02665557 Y. Du, R. Schmid-Fetzer, J. Phase Equilib., 17, 311-324(1996).
assessment that models this phase; reports values for this phase

AL3TA2_H (Al–Ta)

Id: phase:al-ta:al3ta2-h; status needs_review
No structure assigned. Why: name_has_descriptive_tokens:H; no_structure_token
Candidate (tdb_comment): Al69Ta39 · cF444 · F-43m — AlTa-98Sau.tdb: 'Prototype Al69Ta39 (cF444, F-43m)'
Stoichiometry: Al 0.6000, Ta 0.4000
Stability: stable in 1 of 1 calculated diagram(s): 1498.13–1835.3 K, x(Ta) 0.4–0.4
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-ta:al3ta2-h
tdb: tdb:AlTa-98Sau.tdb:AL3TA2_H

TDB models of AL3TA2_H (1): PHASE and CONSTITUENT statements as written

AlTa-98Sau.tdb: AL3TA2_H, type code %, sha256 790811d9dcc140fc…

51: PHASE AL3TA2_H % 2 3 2 !
52: CONST AL3TA2_H : AL : TA : !

AL3TA2_L (Al–Ta)

Id: phase:al-ta:al3ta2-l; status unresolved_no_candidates
No structure assigned. Why: name_has_descriptive_tokens:L; no_structure_token
Stoichiometry: Al 0.6000, Ta 0.4000
Stability: stable in 1 of 1 calculated diagram(s): 300–1498.13 K, x(Ta) 0.4–0.4
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-ta:al3ta2-l
tdb: tdb:AlTa-98Sau.tdb:AL3TA2_L

TDB models of AL3TA2_L (1): PHASE and CONSTITUENT statements as written

AlTa-98Sau.tdb: AL3TA2_L, type code %, sha256 790811d9dcc140fc…

56: PHASE AL3TA2_L % 2 3 2 !
57: CONST AL3TA2_L : AL : TA : !

AL69TA39 (Al–Ta)

Id: phase:al-ta:al69ta39; status assigned
Structure: Al69Ta39 · cF444 · F-43m (216); type st:al69ta39-cf444; 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 2 of 2 calculated diagram(s): 1371.45–1884.72 K, x(Ta) 0.35489–0.37818
Literature: 23 values (23 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:al-ta:al69ta39
paper: paper:10.1007/bf02665557:Al69Ta39, paper:10.1016/j.intermet.2009.06.015:Ta39Al69
tdb: tdb:AlTa-10Wit.tdb:AL69TA39, tdb:AlTa-96Du-LB.tdb:AL69TA39

TDB models of AL69TA39 (2): PHASE and CONSTITUENT statements as written

AlTa-10Wit.tdb: AL69TA39, type code %, sha256 667ded9a7ea8878f…

53: PHASE AL69TA39 % 2 69 39 !
54: CONST AL69TA39 : AL% TA : AL TA% : !

AlTa-96Du-LB.tdb: AL69TA39, type code %, sha256 db1782b402270c14…

52: PHASE AL69TA39 % 2 0.638889 0.361111 !
53: CONST AL69TA39 : AL : TA : !

Example references (2 of 2; assessments first):

doi:10.1007/BF02665557 Y. Du, R. Schmid-Fetzer, J. Phase Equilib., 17, 311-324(1996).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2009.06.015 V.T. Witusiewicz, A.A. Bondar, U. Hecht, J. Zollinger, V.M. Petyukh, O.S. Fomichov et al., Experimental study and thermodynamic re-assessment of the binary Al–Ta system, Intermetallics 18, 92-106 (2010).
assessment that models this phase; reports values for this phase

AL7TA5 (Al–Ta)

Id: phase:al-ta:al7ta5; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (literature_printed): (Al7Ta5) · hP* — printed with a label mapped to this phase
Candidate (sgte_mmc2): (Al7Ta5) — Hallstedt 2025 mmc2 row for AL7TA5: Al7Ta5
Stoichiometry: Al 0.5833, Ta 0.4167
Stability: stable in 1 of 1 calculated diagram(s): 300–1618.38 K, x(Ta) 0.41667–0.41667
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:al-ta:al7ta5
paper: paper:10.1007/bf02665557:Al7Ta5
tdb: tdb:AlTa-96Du-LB.tdb:AL7TA5

TDB models of AL7TA5 (1): PHASE and CONSTITUENT statements as written

AlTa-96Du-LB.tdb: AL7TA5, type code %, sha256 db1782b402270c14…

57: PHASE AL7TA5 %  2 0.583333 0.416667 !
58: CONST AL7TA5 : AL : TA : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02665557 Y. Du, R. Schmid-Fetzer, J. Phase Equilib., 17, 311-324(1996).
assessment that models this phase; reports values for this phase

ALTA (Al–Ta)

Id: phase:al-ta:alta; status needs_review
No structure assigned. Why: models_disagree_on_composition; no_structure_token; sgte_mmc2_row_incomplete
Candidate (literature_printed): (AlTa) · mP* — printed with a label mapped to this phase
Candidate (sgte_mmc2): (AlTa) — Hallstedt 2025 mmc2 row for ALTA: AlTa
Stability: stable in 2 of 2 calculated diagram(s): 300–2037.05 K, x(Ta) 0.5–0.51515
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:al-ta:alta
paper: paper:10.1007/bf02665557:AlTa
tdb: tdb:AlTa-90Kat.tdb:ALTA, tdb:AlTa-96Du-LB.tdb:ALTA

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

AlTa-90Kat.tdb: ALTA, type code %, sha256 a4157073c1d594d6…

57: PHASE ALTA %  2 0.51515 0.48485 !
58: CONST ALTA : TA : AL : !

AlTa-96Du-LB.tdb: ALTA, type code %, sha256 db1782b402270c14…

62: PHASE ALTA % 2 0.5 0.5 !
63: CONST ALTA : AL : TA : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02665557 Y. Du, R. Schmid-Fetzer, J. Phase Equilib., 17, 311-324(1996).
assessment that models this phase; reports values for this phase

BCC_A2 (Al–Ta)

Id: phase:al-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 4 of 4 calculated diagram(s): 300–3999.99 K, x(Ta) 0.87743–1
Literature: 5 values (5 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:al-ta:bcc-a2
paper: paper:10.1007/bf02665557:bcc (Ta), paper:sha256-85fd53a1a176b694:bcc-A2
tdb: tdb:AlTa-10Wit.tdb:BCC_A2, tdb:AlTa-90Kat.tdb:BCC_A2, tdb:AlTa-96Du-LB.tdb:BCC_A2, tdb:AlTa-98Sau.tdb:BCC_A2

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

AlTa-10Wit.tdb: BCC_A2, type code %B, sha256 667ded9a7ea8878f…

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

AlTa-90Kat.tdb: BCC_A2, type code %, sha256 a4157073c1d594d6…

37: PHASE BCC_A2 % 2 1 3 !
38: CONST BCC_A2 : AL TA% : VA : !

AlTa-96Du-LB.tdb: BCC_A2, type code %, sha256 db1782b402270c14…

37: PHASE BCC_A2 % 2 1 3 !
38: CONST BCC_A2 : AL TA : VA : !

AlTa-98Sau.tdb: BCC_A2, type code %, sha256 790811d9dcc140fc…

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

Example references (2 of 2; assessments first):

doi:10.1007/BF02665557 Y. Du, R. Schmid-Fetzer, J. Phase Equilib., 17, 311-324(1996).
assessment that models this phase; reports values for this phase
doi:10.1016/j.intermet.2009.06.015 V.T. Witusiewicz, A.A. Bondar, U. Hecht, J. Zollinger, V.M. Petyukh, O.S. Fomichov et al., Experimental study and thermodynamic re-assessment of the binary Al–Ta system, Intermetallics 18, 92-106 (2010).
assessment that models this phase

SIGMA_D8B (Al–Ta)

Id: phase:al-ta:d8b-sigma; status assigned
Structure: sigma-CrFe · D8_b · tP30 · P4_2/mnm (136); type st:d8-b-sigma-crfe-tp30; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in AlTa-10Wit.tdb also describes the disordered state
Caveat: partitioned order/disorder model in AlTa-90Kat.tdb also describes the disordered state
Caveat: partitioned order/disorder model in AlTa-96Du-LB.tdb also describes the disordered state
Stability: stable in 4 of 4 calculated diagram(s): 300–2378.58 K, x(Ta) 0.50945–0.85074
Literature: 56 values (55 accepted) from 3 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:al-ta:d8b-sigma, corpus:phase:al-ta:sigma-d8b
paper: paper:10.1007/bf02665557:AlTa2, paper:10.1007/bf02665557:σAlTa2, paper:10.1016/j.intermet.2009.06.015:σ, paper:sha256-85fd53a1a176b694:σ
tdb: tdb:AlTa-10Wit.tdb:SIGMA_D8B, tdb:AlTa-90Kat.tdb:SIGMA_D8B, tdb:AlTa-96Du-LB.tdb:SIGMA_D8B, tdb:AlTa-98Sau.tdb:SIGMA_D8B

TDB models of SIGMA_D8B (4): PHASE and CONSTITUENT statements as written

AlTa-10Wit.tdb: SIGMA_D8B, type code %, sha256 667ded9a7ea8878f…

63: PHASE SIGMA_D8B % 3 10 4 16 !
64: CONST SIGMA_D8B : AL% TA : TA : AL TA : !

AlTa-90Kat.tdb: SIGMA_D8B, type code %, sha256 a4157073c1d594d6…

62: PHASE SIGMA_D8B %  3 10 4 16 !
63: CONST SIGMA_D8B : AL TA : TA : AL TA : !

AlTa-96Du-LB.tdb: SIGMA_D8B, type code %, sha256 db1782b402270c14…

72: PHASE SIGMA_D8B % 3 10 4 16 !
73: CONST SIGMA_D8B : AL% TA : TA : AL TA : !

AlTa-98Sau.tdb: SIGMA_D8B, type code %, sha256 790811d9dcc140fc…

61: PHASE SIGMA_D8B % 3 8 4 18 !
62: CONST SIGMA_D8B : AL : TA : AL TA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.intermet.2009.06.015 V.T. Witusiewicz, A.A. Bondar, U. Hecht, J. Zollinger, V.M. Petyukh, O.S. Fomichov et al., Experimental study and thermodynamic re-assessment of the binary Al–Ta system, Intermetallics 18, 92-106 (2010).
assessment that models this phase; reports values for this phase
doi:10.1007/BF02665557 Y. Du, R. Schmid-Fetzer, J. Phase Equilib., 17, 311-324(1996).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase

FCC_A1 (Al–Ta)

Id: phase:al-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 4 of 4 calculated diagram(s): 300–935.02 K, x(Ta) 0–0.00252
Literature: 7 values (7 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:al-ta:fcc-a1
paper: paper:10.1007/bf02665557:fcc (Al), paper:10.1016/j.intermet.2009.06.015:(αAl), paper:sha256-85fd53a1a176b694:fcc-Al
tdb: tdb:AlTa-10Wit.tdb:FCC_A1, tdb:AlTa-90Kat.tdb:FCC_A1, tdb:AlTa-96Du-LB.tdb:FCC_A1, tdb:AlTa-98Sau.tdb:FCC_A1

TDB models of FCC_A1 (4): PHASE and CONSTITUENT statements as written

AlTa-10Wit.tdb: FCC_A1, type code %A, sha256 667ded9a7ea8878f…

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

AlTa-90Kat.tdb: FCC_A1, type code %, sha256 a4157073c1d594d6…

32: PHASE FCC_A1 % 2 1 1 !
33: CONST FCC_A1 : AL% TA : VA : !

AlTa-96Du-LB.tdb: FCC_A1, type code %, sha256 db1782b402270c14…

32: PHASE FCC_A1 % 2 1 1 !
33: CONST FCC_A1 : AL TA : VA : !

AlTa-98Sau.tdb: FCC_A1, type code %, sha256 790811d9dcc140fc…

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

Example references (2 of 2; assessments first):

doi:10.1016/j.intermet.2009.06.015 V.T. Witusiewicz, A.A. Bondar, U. Hecht, J. Zollinger, V.M. Petyukh, O.S. Fomichov et al., Experimental study and thermodynamic re-assessment of the binary Al–Ta system, Intermetallics 18, 92-106 (2010).
assessment that models this phase; reports values for this phase
doi:10.1007/BF02665557 Y. Du, R. Schmid-Fetzer, J. Phase Equilib., 17, 311-324(1996).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase

HCP_A3 (Al–Ta)

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

Names (5): corpus: corpus:phase:al-ta:hcp-a3
tdb: tdb:AlTa-10Wit.tdb:HCP_A3, tdb:AlTa-90Kat.tdb:HCP_A3, tdb:AlTa-96Du-LB.tdb:HCP_A3, tdb:AlTa-98Sau.tdb:HCP_A3

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

AlTa-10Wit.tdb: HCP_A3, type code %A, sha256 667ded9a7ea8878f…

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

AlTa-90Kat.tdb: HCP_A3, type code %, sha256 a4157073c1d594d6…

42: PHASE HCP_A3 % 2 1 0.5 !
43: CONST HCP_A3 : AL TA : VA : !

AlTa-96Du-LB.tdb: HCP_A3, type code %, sha256 db1782b402270c14…

42: PHASE HCP_A3 % 2 1 0.5 !
43: CONST HCP_A3 : AL TA : VA : !

AlTa-98Sau.tdb: HCP_A3, type code %, sha256 790811d9dcc140fc…

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

Example references (2 of 2; assessments first):

doi:10.1007/BF02665557 Y. Du, R. Schmid-Fetzer, J. Phase Equilib., 17, 311-324(1996).
assessment that models this phase
doi:10.1016/j.intermet.2009.06.015 V.T. Witusiewicz, A.A. Bondar, U. Hecht, J. Zollinger, V.M. Petyukh, O.S. Fomichov et al., Experimental study and thermodynamic re-assessment of the binary Al–Ta system, Intermetallics 18, 92-106 (2010).
assessment that models this phase

LIQUID (Al–Ta)

Id: phase:al-ta:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 4 of 4 calculated diagram(s): 929.7–4000 K, x(Ta) 0–1
Literature: 36 values (36 accepted) from 3 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:al-ta:liquid
paper: paper:10.1007/bf02665557:Liquid, paper:10.1007/bf02665557:liquid, paper:10.1016/j.intermet.2009.06.015:L, paper:sha256-85fd53a1a176b694:Liquid
tdb: tdb:AlTa-10Wit.tdb:LIQUID, tdb:AlTa-90Kat.tdb:LIQUID, tdb:AlTa-96Du-LB.tdb:LIQUID, tdb:AlTa-98Sau.tdb:LIQUID

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

AlTa-10Wit.tdb: LIQUID, type code %, sha256 667ded9a7ea8878f…

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

AlTa-90Kat.tdb: LIQUID, type code %, sha256 a4157073c1d594d6…

27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : AL TA : !

AlTa-96Du-LB.tdb: LIQUID, type code %, sha256 db1782b402270c14…

27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : AL TA : !

AlTa-98Sau.tdb: LIQUID, type code %, sha256 790811d9dcc140fc…

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

Example references (2 of 2; assessments first):

doi:10.1007/BF02665557 Y. Du, R. Schmid-Fetzer, J. Phase Equilib., 17, 311-324(1996).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.intermet.2009.06.015 V.T. Witusiewicz, A.A. Bondar, U. Hecht, J. Zollinger, V.M. Petyukh, O.S. Fomichov et al., Experimental study and thermodynamic re-assessment of the binary Al–Ta system, Intermetallics 18, 92-106 (2010).
assessment that models this phase; reports 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}
}