Al–Ba phases

8 phases (tier A 4, tier B 1, tier C 2, liquid 1); 7 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–Ba system page · Markdown · field reference

Phases of the Al–Ba system (8)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
AL13BA7 phase:al-ba:al13ba7	Al13Ba7 · hP20 · P-3m1 (164)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 3 of 3 calculated diagram(s): 300–1197.08 K, x(Ba) 0.35–0.35	31	3
AL4BA_D13 phase:al-ba:al4ba-d13	Al4Ba · D1_3 · tI10 · I4/mmm (139)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1379.52 K, x(Ba) 0.2–0.2	38	3
AL5BA3 phase:al-ba:al5ba3	Al5Ba3 · hP16 · P6_3/mmc (194)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–1024.66 K, x(Ba) 0.375–0.375	26	2
AL5BA4 phase:al-ba:al5ba4	Al5Ba4 · hP18 · P6_3/mmc (194)	tier B: DFT-supported (unique MP + OQMD match)	stable in 3 of 3 calculated diagram(s): 300–1003.15 K, x(Ba) 0.44444–0.44444	38	3
BCC_A2 phase:al-ba:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–2500 K, x(Ba) 0.96601–1	14	3
FCC_A1 phase:al-ba:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–990.97 K, x(Ba) 0–0	13	3
HCP_A3 phase:al-ba: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:al-ba:liquid	liquid	liquid	stable in 3 of 3 calculated diagram(s): 800–2500 K, x(Ba) 0–1	61	3

AL13BA7 (Al–Ba)

Id: phase:al-ba:al13ba7; status assigned
Structure: Al13Ba7 · hP20 · P-3m1 (164); type st:al13ba7-hp20; 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: Al 0.6500, Ba 0.3500
Stability: stable in 3 of 3 calculated diagram(s): 300–1197.08 K, x(Ba) 0.35–0.35
Literature: 31 values (31 accepted) from 3 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:al-ba:al13ba7
paper: paper:10.1007/s11669-016-0466-y:Al13Ba7, paper:10.1007/s11669-019-00714-2:Al13Ba7, paper:10.1140/epjst/e2016-60183-4:Al13Ba7
tdb: tdb:AlBa-16Bao.tdb:AL13BA7, tdb:AlBa-17Azz.tdb:AL13BA7, tdb:AlBa-19Ben.tdb:AL13BA7

TDB models of AL13BA7 (3): PHASE and CONSTITUENT statements as written

AlBa-16Bao.tdb: AL13BA7, type code %, sha256 8449c815abb5e15a…

50: PHASE AL13BA7 % 2 13 7 !
51: CONST AL13BA7 : AL : BA : !

AlBa-17Azz.tdb: AL13BA7, type code %, sha256 b714036187c03e1c…

52: PHASE AL13BA7 % 2 13 7 !
53: CONST AL13BA7 : AL : BA : !

AlBa-19Ben.tdb: AL13BA7, type code %, sha256 75aa4cde7e1bdd7e…

48: PHASE AL13BA7 % 2 13 7 !
49: CONST AL13BA7 : AL : BA : !

Example references (7 of 7; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-016-0466-y Xiaoheng Bao, Libin Liu, Yurong Jiang, Yun Jiang, Cun Mao, Xian Li et al., Thermodynamic Assessment of the Al-Ba System, J. Phase Equilib. Diffus. 37, 345-349 (2016).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1140/epjst/e2016-60183-4 H. Azza, N. Selhaoui, K. Achgar, Thermodynamic description of the aluminum-barium phase diagram, Eur. Phys. J. Spec. Top. 226, 1143-1150 (2017).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02671974 V. P. Itkin, C. B. Alcock, The Al-Ba (Aluminum-Barium) system, JPE 14, 518-524 (1993).
cited as the source of values for this phase
doi:10.1007/bf02679015 S. Srikanth, K. T. Jacob, Thermodynamics of aluminum-barium alloys, Metall Trans B 22, 607-616 (1991).
cited as the source of values for this phase
doi:10.1016/0022-5088(75)90078-8 M.L Fornasini, G Bruzzone, The crystal structure of the Ba7AL13 phase, Journal of the Less Common Metals 40, 335-340 (1975).
cited as the source of values for this phase
doi:10.1016/0022-5088(75)90212-x G. Bruzzone, F. Merlo, The strontium-aluminium and barium-aluminium systems, Journal of the Less Common Metals 39, 1-6 (1975).
cited as the source of values for this phase

AL4BA_D13 (Al–Ba)

Id: phase:al-ba:al4ba-d13; status assigned
Structure: Al4Ba · D1_3 · tI10 · I4/mmm (139); type st:d1-3-al4ba-ti10; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaacvf and oqmd-10391, space group 139
Stoichiometry: Al 0.8000, Ba 0.2000
Stability: stable in 3 of 3 calculated diagram(s): 300–1379.52 K, x(Ba) 0.2–0.2
Literature: 38 values (38 accepted) from 3 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:al-ba:al4ba-d13
mp: mp:mp-aaaaacvf
oqmd: oqmd:oqmd-10391
paper: paper:10.1007/s11669-016-0466-y:Al4Ba, paper:10.1007/s11669-019-00714-2:Al4Ba, paper:10.1140/epjst/e2016-60183-4:Al4Ba
tdb: tdb:AlBa-16Bao.tdb:AL4BA_D13, tdb:AlBa-17Azz.tdb:AL4BA_D13, tdb:AlBa-19Ben.tdb:AL4BA_D13

TDB models of AL4BA_D13 (3): PHASE and CONSTITUENT statements as written

AlBa-16Bao.tdb: AL4BA_D13, type code %, sha256 8449c815abb5e15a…

45: PHASE AL4BA_D13 % 2 4 1 !
46: CONST AL4BA_D13 : AL : BA : !

AlBa-17Azz.tdb: AL4BA_D13, type code %, sha256 b714036187c03e1c…

47: PHASE AL4BA_D13 % 2 4 1 !
48: CONST AL4BA_D13 : AL : BA : !

AlBa-19Ben.tdb: AL4BA_D13, type code %, sha256 75aa4cde7e1bdd7e…

43: PHASE AL4BA_D13 % 2 4 1 !
44: CONST AL4BA_D13 : AL : BA : !

Example references (8 of 8; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-016-0466-y Xiaoheng Bao, Libin Liu, Yurong Jiang, Yun Jiang, Cun Mao, Xian Li et al., Thermodynamic Assessment of the Al-Ba System, J. Phase Equilib. Diffus. 37, 345-349 (2016).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1140/epjst/e2016-60183-4 H. Azza, N. Selhaoui, K. Achgar, Thermodynamic description of the aluminum-barium phase diagram, Eur. Phys. J. Spec. Top. 226, 1143-1150 (2017).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02679015 S. Srikanth, K. T. Jacob, Thermodynamics of aluminum-barium alloys, Metall Trans B 22, 607-616 (1991).
cited as the source of values for this phase
doi:10.1007/bf02671974 V. P. Itkin, C. B. Alcock, The Al-Ba (Aluminum-Barium) system, JPE 14, 518-524 (1993).
cited as the source of values for this phase
doi:10.1016/0022-5088(75)90212-x G. Bruzzone, F. Merlo, The strontium-aluminium and barium-aluminium systems, Journal of the Less Common Metals 39, 1-6 (1975).
cited as the source of values for this phase
doi:10.1016/0040-6031(82)87023-8 M. Notin, B. Djamshidi, J.C.L. Gachon, J. Hertz, Determination calorimetrique de l'enthalpie de formation des alliages (Al, Ba) riches en aluminum, Thermochimica Acta 57, 57-66 (1982).
cited as the source of values for this phase
doi:10.1515/ijmr-1934-261-1203 E. Alberti, Untersuchungen über das System Aluminium*Barium, International Journal of Materials Research 26, 6-9 (1934).
cited as the source of values for this phase

AL5BA3 (Al–Ba)

Id: phase:al-ba:al5ba3; status assigned
Structure: Al5Ba3 · hP16 · P6_3/mmc (194); type st:al5ba3-hp16; 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: Al 0.6250, Ba 0.3750
Stability: stable in 2 of 2 calculated diagram(s): 300–1024.66 K, x(Ba) 0.375–0.375
Literature: 26 values (26 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:al-ba:al5ba3
paper: paper:10.1007/s11669-019-00714-2:Al5Ba3, paper:10.1140/epjst/e2016-60183-4:Al5Ba3
tdb: tdb:AlBa-17Azz.tdb:AL5BA3, tdb:AlBa-19Ben.tdb:AL5BA3

TDB models of AL5BA3 (2): PHASE and CONSTITUENT statements as written

AlBa-17Azz.tdb: AL5BA3, type code %, sha256 b714036187c03e1c…

57: PHASE AL5BA3 % 2 5 3 !
58: CONST AL5BA3 : AL : BA : !

AlBa-19Ben.tdb: AL5BA3, type code %, sha256 75aa4cde7e1bdd7e…

53: PHASE AL5BA3 % 2 5 3 !
54: CONST AL5BA3 : AL : BA : !

Example references (7 of 7; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1140/epjst/e2016-60183-4 H. Azza, N. Selhaoui, K. Achgar, Thermodynamic description of the aluminum-barium phase diagram, Eur. Phys. J. Spec. Top. 226, 1143-1150 (2017).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02671974 V. P. Itkin, C. B. Alcock, The Al-Ba (Aluminum-Barium) system, JPE 14, 518-524 (1993).
cited as the source of values for this phase
doi:10.1107/s0108270188004020 M. L. Fornasini, Ba3Al5, a simple atomic arrangement also present in more complex structures, Acta Crystallogr C Cryst Struct Commun 44, 1355-1357 (1988).
cited as the source of values for this phase
doi:10.1007/bf02679015 S. Srikanth, K. T. Jacob, Thermodynamics of aluminum-barium alloys, Metall Trans B 22, 607-616 (1991).
cited as the source of values for this phase
doi:10.1007/s11669-016-0466-y Xiaoheng Bao, Libin Liu, Yurong Jiang, Yun Jiang, Cun Mao, Xian Li et al., Thermodynamic Assessment of the Al-Ba System, J. Phase Equilib. Diffus. 37, 345-349 (2016).
cited as the source of values for this phase
doi:10.1016/0022-5088(75)90212-x G. Bruzzone, F. Merlo, The strontium-aluminium and barium-aluminium systems, Journal of the Less Common Metals 39, 1-6 (1975).
cited as the source of values for this phase

AL5BA4 (Al–Ba)

Id: phase:al-ba:al5ba4; status assigned
Structure: Al5Ba4 · hP18 · P6_3/mmc (194); type st:al5ba4-hp18; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Al 0.5556, Ba 0.4444
Stability: stable in 3 of 3 calculated diagram(s): 300–1003.15 K, x(Ba) 0.44444–0.44444
Literature: 38 values (38 accepted) from 3 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:al-ba:al5ba4
mp: mp:mp-aaaaadxf
oqmd: oqmd:oqmd-2029
paper: paper:10.1007/s11669-016-0466-y:Al5Ba4, paper:10.1007/s11669-019-00714-2:Al5Ba4, paper:10.1140/epjst/e2016-60183-4:Al5Ba4
tdb: tdb:AlBa-16Bao.tdb:AL5BA4, tdb:AlBa-17Azz.tdb:AL5BA4, tdb:AlBa-19Ben.tdb:AL5BA4

TDB models of AL5BA4 (3): PHASE and CONSTITUENT statements as written

AlBa-16Bao.tdb: AL5BA4, type code %, sha256 8449c815abb5e15a…

55: PHASE AL5BA4 % 2 5 4 !
56: CONST AL5BA4 : AL : BA : !

AlBa-17Azz.tdb: AL5BA4, type code %, sha256 b714036187c03e1c…

62: PHASE AL5BA4 % 2 5 4 !
63: CONST AL5BA4 : AL : BA : !

AlBa-19Ben.tdb: AL5BA4, type code %, sha256 75aa4cde7e1bdd7e…

58: PHASE AL5BA4 % 2 5 4 !
59: CONST AL5BA4 : AL : BA : !

Example references (7 of 7; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-016-0466-y Xiaoheng Bao, Libin Liu, Yurong Jiang, Yun Jiang, Cun Mao, Xian Li et al., Thermodynamic Assessment of the Al-Ba System, J. Phase Equilib. Diffus. 37, 345-349 (2016).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1140/epjst/e2016-60183-4 H. Azza, N. Selhaoui, K. Achgar, Thermodynamic description of the aluminum-barium phase diagram, Eur. Phys. J. Spec. Top. 226, 1143-1150 (2017).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02679015 S. Srikanth, K. T. Jacob, Thermodynamics of aluminum-barium alloys, Metall Trans B 22, 607-616 (1991).
cited as the source of values for this phase
doi:10.1007/bf02671974 V. P. Itkin, C. B. Alcock, The Al-Ba (Aluminum-Barium) system, JPE 14, 518-524 (1993).
cited as the source of values for this phase
doi:10.1016/0022-5088(75)90212-x G. Bruzzone, F. Merlo, The strontium-aluminium and barium-aluminium systems, Journal of the Less Common Metals 39, 1-6 (1975).
cited as the source of values for this phase
doi:10.1016/0022-5088(75)90078-8 M.L Fornasini, G Bruzzone, The crystal structure of the Ba7AL13 phase, Journal of the Less Common Metals 40, 335-340 (1975).
cited as the source of values for this phase

BCC_A2 (Al–Ba)

Id: phase:al-ba: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): 300–2500 K, x(Ba) 0.96601–1
Literature: 14 values (14 accepted) from 3 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:al-ba:bcc-a2
paper: paper:10.1007/s11669-016-0466-y:(Ba), paper:10.1007/s11669-019-00714-2:Ba, paper:10.1140/epjst/e2016-60183-4:Ba
tdb: tdb:AlBa-16Bao.tdb:BCC_A2, tdb:AlBa-17Azz.tdb:BCC_A2, tdb:AlBa-19Ben.tdb:BCC_A2

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

AlBa-16Bao.tdb: BCC_A2, type code %B, sha256 8449c815abb5e15a…

35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : AL BA% : VA : !

AlBa-17Azz.tdb: BCC_A2, type code %B, sha256 b714036187c03e1c…

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

AlBa-19Ben.tdb: BCC_A2, type code %B, sha256 75aa4cde7e1bdd7e…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : AL BA% : VA : !

Example references (6 of 6; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-016-0466-y Xiaoheng Bao, Libin Liu, Yurong Jiang, Yun Jiang, Cun Mao, Xian Li et al., Thermodynamic Assessment of the Al-Ba System, J. Phase Equilib. Diffus. 37, 345-349 (2016).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1140/epjst/e2016-60183-4 H. Azza, N. Selhaoui, K. Achgar, Thermodynamic description of the aluminum-barium phase diagram, Eur. Phys. J. Spec. Top. 226, 1143-1150 (2017).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02671974 V. P. Itkin, C. B. Alcock, The Al-Ba (Aluminum-Barium) system, JPE 14, 518-524 (1993).
cited as the source of values for this phase
doi:10.1007/bf02679015 S. Srikanth, K. T. Jacob, Thermodynamics of aluminum-barium alloys, Metall Trans B 22, 607-616 (1991).
cited as the source of values for this phase
doi:10.1016/0022-5088(75)90212-x G. Bruzzone, F. Merlo, The strontium-aluminium and barium-aluminium systems, Journal of the Less Common Metals 39, 1-6 (1975).
cited as the source of values for this phase

FCC_A1 (Al–Ba)

Id: phase:al-ba: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): 300–990.97 K, x(Ba) 0–0
Literature: 13 values (13 accepted) from 3 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:al-ba:fcc-a1
paper: paper:10.1007/s11669-016-0466-y:(Al), paper:10.1007/s11669-019-00714-2:Al, paper:10.1140/epjst/e2016-60183-4:Al
tdb: tdb:AlBa-16Bao.tdb:FCC_A1, tdb:AlBa-17Azz.tdb:FCC_A1, tdb:AlBa-19Ben.tdb:FCC_A1

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

AlBa-16Bao.tdb: FCC_A1, type code %A, sha256 8449c815abb5e15a…

30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : AL% BA : VA : !

AlBa-17Azz.tdb: FCC_A1, type code %A, sha256 b714036187c03e1c…

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

AlBa-19Ben.tdb: FCC_A1, type code %A, sha256 75aa4cde7e1bdd7e…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : AL% BA : VA : !

Example references (7 of 7; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-016-0466-y Xiaoheng Bao, Libin Liu, Yurong Jiang, Yun Jiang, Cun Mao, Xian Li et al., Thermodynamic Assessment of the Al-Ba System, J. Phase Equilib. Diffus. 37, 345-349 (2016).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1140/epjst/e2016-60183-4 H. Azza, N. Selhaoui, K. Achgar, Thermodynamic description of the aluminum-barium phase diagram, Eur. Phys. J. Spec. Top. 226, 1143-1150 (2017).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02671974 V. P. Itkin, C. B. Alcock, The Al-Ba (Aluminum-Barium) system, JPE 14, 518-524 (1993).
cited as the source of values for this phase
doi:10.1007/bf02679015 S. Srikanth, K. T. Jacob, Thermodynamics of aluminum-barium alloys, Metall Trans B 22, 607-616 (1991).
cited as the source of values for this phase
doi:10.1016/0022-5088(75)90212-x G. Bruzzone, F. Merlo, The strontium-aluminium and barium-aluminium systems, Journal of the Less Common Metals 39, 1-6 (1975).
cited as the source of values for this phase
doi:10.1515/ijmr-1934-261-1203 E. Alberti, Untersuchungen über das System Aluminium*Barium, International Journal of Materials Research 26, 6-9 (1934).
cited as the source of values for this phase

HCP_A3 (Al–Ba)

Id: phase:al-ba: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:al-ba:hcp-a3
tdb: tdb:AlBa-16Bao.tdb:HCP_A3, tdb:AlBa-17Azz.tdb:HCP_A3, tdb:AlBa-19Ben.tdb:HCP_A3

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

AlBa-16Bao.tdb: HCP_A3, type code %A, sha256 8449c815abb5e15a…

40: PHASE HCP_A3 %A 2 1 0.5 !
41: CONST HCP_A3 : AL BA : VA : !

AlBa-17Azz.tdb: HCP_A3, type code %A, sha256 b714036187c03e1c…

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

AlBa-19Ben.tdb: HCP_A3, type code %A, sha256 75aa4cde7e1bdd7e…

38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : AL BA : VA : !

Example references (3 of 3; assessments first):

doi:10.1007/s11669-016-0466-y Xiaoheng Bao, Libin Liu, Yurong Jiang, Yun Jiang, Cun Mao, Xian Li et al., Thermodynamic Assessment of the Al-Ba System, J. Phase Equilib. Diffus. 37, 345-349 (2016).
assessment that models this phase
doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase
doi:10.1140/epjst/e2016-60183-4 H. Azza, N. Selhaoui, K. Achgar, Thermodynamic description of the aluminum-barium phase diagram, Eur. Phys. J. Spec. Top. 226, 1143-1150 (2017).
assessment that models this phase

LIQUID (Al–Ba)

Id: phase:al-ba:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 800–2500 K, x(Ba) 0–1
Literature: 61 values (61 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:al-ba:liquid
paper: paper:10.1007/s11669-016-0466-y:Liquid, paper:10.1007/s11669-019-00714-2:L, paper:10.1007/s11669-019-00714-2:liquid, paper:10.1140/epjst/e2016-60183-4:L
tdb: tdb:AlBa-16Bao.tdb:LIQUID, tdb:AlBa-17Azz.tdb:LIQUID, tdb:AlBa-19Ben.tdb:LIQUID

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

AlBa-16Bao.tdb: LIQUID, type code %, sha256 8449c815abb5e15a…

25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : AL BA : !

AlBa-17Azz.tdb: LIQUID, type code %, sha256 b714036187c03e1c…

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

AlBa-19Ben.tdb: LIQUID, type code %, sha256 75aa4cde7e1bdd7e…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : AL BA : !

Example references (7 of 7; assessments first):

doi:10.1007/s11669-019-00714-2 R. Benhafid, A. Belgacem Bouzida, Y. Djaballah, A. Candan, A. İyigör, G. Uğur, Thermodynamic Modeling of the Al-Ba and Ba-Ge Systems Supported by First-Principles Calculations, J. Phase Equilib. Diffus. 40, 195-205 (2019).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-016-0466-y Xiaoheng Bao, Libin Liu, Yurong Jiang, Yun Jiang, Cun Mao, Xian Li et al., Thermodynamic Assessment of the Al-Ba System, J. Phase Equilib. Diffus. 37, 345-349 (2016).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1140/epjst/e2016-60183-4 H. Azza, N. Selhaoui, K. Achgar, Thermodynamic description of the aluminum-barium phase diagram, Eur. Phys. J. Spec. Top. 226, 1143-1150 (2017).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02671974 V. P. Itkin, C. B. Alcock, The Al-Ba (Aluminum-Barium) system, JPE 14, 518-524 (1993).
cited as the source of values for this phase
doi:10.1007/bf02679015 S. Srikanth, K. T. Jacob, Thermodynamics of aluminum-barium alloys, Metall Trans B 22, 607-616 (1991).
cited as the source of values for this phase
doi:10.1016/0022-5088(75)90212-x G. Bruzzone, F. Merlo, The strontium-aluminium and barium-aluminium systems, Journal of the Less Common Metals 39, 1-6 (1975).
cited as the source of values for this phase
doi:10.1515/ijmr-1934-261-1203 E. Alberti, Untersuchungen über das System Aluminium*Barium, International Journal of Materials Research 26, 6-9 (1934).
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}
}