Al–Pd phases

13 phases (tier A 7, tier B 1, tier C 2, liquid 1, needs_review 2); 11 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–Pd system page · Markdown · field reference

Phases of the Al–Pd system (13)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
AL21PD8 phase:al-pd:al21pd8	Al21Pt8 · tI116 · I4_1/a (88)	tier B: DFT-supported (unique MP + OQMD match)	stable in 3 of 3 calculated diagram(s): 300–1063.8 K, x(Pd) 0.27586–0.27586	6	3
AL2PD5 phase:al-pd:al2pd5	Ga2Pd5 · oP28 · Pnma (62)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 3 of 3 calculated diagram(s): 300–1246.17 K, x(Pd) 0.70404–0.71429	4	3
AL3PD phase:al-pd:al3pd		needs_review	stable in 3 of 3 calculated diagram(s): 852.09–1059.13 K, x(Pd) 0.25–0.29958	9	3
AL3PD2_D513 phase:al-pd:al3pd2-d513	Ni2Al3 · D5_13 · hP5 · P-3m1 (164)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1224.51 K, x(Pd) 0.3871–0.4124	4	3
AL3PD5 phase:al-pd:al3pd5	Ge3Rh5 · oP16 · Pbam (55)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 3 of 3 calculated diagram(s): 880–1592.92 K, x(Pd) 0.625–0.625	6	3
AL4PD phase:al-pd:al4pd		needs_review	stable in 3 of 3 calculated diagram(s): 300–877.27 K, x(Pd) 0.2–0.2	4	3
ALPD_B2 phase:al-pd:alpd-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1918.84 K, x(Pd) 0.44239–0.57122	8	2
ALPD2_C37 phase:al-pd:alpd2-c37	Co2Si · C37 · oP12 · Pnma (62)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1691.49 K, x(Pd) 0.6465–0.72644	12	3
BCC_A2 phase:al-pd:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 3 calculated diagram(s)	0	4
B2_BCC phase:al-pd:bcc-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1940.47 K, x(Pd) 0.45766–0.54792	0	1
FCC_A1 phase:al-pd:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–2433 K, x(Pd) 0–1	8	3
HCP_A3 phase:al-pd: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-pd:liquid	liquid	liquid	stable in 3 of 3 calculated diagram(s): 879.9–2500 K, x(Pd) 0–1	21	3

AL21PD8 (Al–Pd)

Id: phase:al-pd:al21pd8; status assigned
Structure: Al21Pt8 · tI116 · I4_1/a (88); type st:al21pt8-ti116; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Al 0.7241, Pd 0.2759
Stability: stable in 3 of 3 calculated diagram(s): 300–1063.8 K, x(Pd) 0.27586–0.27586
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:al-pd:al21pd8
mp: mp:mp-aaaaacfq
oqmd: oqmd:oqmd-54929
paper: paper:10.1016/j.intermet.2005.04.001:Al21Pd8
tdb: tdb:AlPd-06Li.tdb:AL21PD8, tdb:AlPd-17Dur.tdb:AL21PD8, tdb:AlPd-21Hom.tdb:AL21PD8

TDB models of AL21PD8 (3): PHASE and CONSTITUENT statements as written

AlPd-06Li.tdb: AL21PD8, type code %, sha256 fe0d623a97496170…

55: PHASE AL21PD8 % 2 21 8 !
56: CONST AL21PD8 : AL : PD : !

AlPd-17Dur.tdb: AL21PD8, type code %, sha256 53154de006cd77b7…

58: PHASE AL21PD8 % 2 21 8 !
59: CONST AL21PD8 : AL : PD : !

AlPd-21Hom.tdb: AL21PD8, type code %, sha256 16c4c1ecb5dbb2e6…

66: PHASE AL21PD8 % 2 21 8 !
67: CONST AL21PD8 : AL : PD : !

Example references (4 of 4; assessments first):

doi:10.1016/j.intermet.2005.04.001 Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Al–Pd system, Intermetallics 14, 39-46 (2006).
assessment that models this phase; reports values for this phase
doi:10.1088/1742-6596/809/1/012008 Libor Ďuriška, Ivona Černičková, Roman Čička, Jozef Janovec, Contribution to thermodynamic description of Al-Pd system, J. Phys.: Conf. Ser. 809, 012008 (2017).
assessment that models this phase
doi:10.3390/met11111803 Viera Homolová, Aleš Kroupa, Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner, Metals 11, 1803 (2021).
assessment that models this phase
doi:10.1007/bf02873025 McAlister AJ. The Al–Pd system. Bull Alloy Phase Diagram 1986;7: 368–74.
cited as the source of values for this phase

AL2PD5 (Al–Pd)

Id: phase:al-pd:al2pd5; status assigned
Structure: Ga2Pd5 · oP28 · Pnma (62); type st:ga2pd5-op28; 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 3 of 3 calculated diagram(s): 300–1246.17 K, x(Pd) 0.70404–0.71429
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:al-pd:al2pd5
paper: paper:10.1016/j.intermet.2005.04.001:(Al2Pd5)
tdb: tdb:AlPd-06Li.tdb:AL2PD5, tdb:AlPd-17Dur.tdb:AL2PD5, tdb:AlPd-21Hom.tdb:AL2PD5

TDB models of AL2PD5 (3): PHASE and CONSTITUENT statements as written

AlPd-06Li.tdb: AL2PD5, type code %, sha256 fe0d623a97496170…

75: PHASE AL2PD5 % 2 2 5 !
76: CONST AL2PD5 : AL : AL PD% : !

AlPd-17Dur.tdb: AL2PD5, type code %, sha256 53154de006cd77b7…

78: PHASE AL2PD5 % 2 2 5 !
79: CONST AL2PD5 : AL : AL PD% : !

AlPd-21Hom.tdb: AL2PD5, type code %, sha256 16c4c1ecb5dbb2e6…

81: PHASE AL2PD5 % 2 2 5 !
82: CONST AL2PD5 : AL : AL PD% : !

Example references (4 of 4; assessments first):

doi:10.1016/j.intermet.2005.04.001 Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Al–Pd system, Intermetallics 14, 39-46 (2006).
assessment that models this phase; reports values for this phase
doi:10.1088/1742-6596/809/1/012008 Libor Ďuriška, Ivona Černičková, Roman Čička, Jozef Janovec, Contribution to thermodynamic description of Al-Pd system, J. Phys.: Conf. Ser. 809, 012008 (2017).
assessment that models this phase
doi:10.3390/met11111803 Viera Homolová, Aleš Kroupa, Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner, Metals 11, 1803 (2021).
assessment that models this phase
doi:10.1007/bf02873025 McAlister AJ. The Al–Pd system. Bull Alloy Phase Diagram 1986;7: 368–74.
cited as the source of values for this phase

AL3PD (Al–Pd)

Id: phase:al-pd:al3pd; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model; sgte_mmc2_row_incomplete
Candidate (dft_mp): I4_1/a (88) — on-hull MP Al21Pd8 at x(PD)=0.2759
Candidate (dft_oqmd): I41/a (88) — on-hull OQMD Al21 Pd8 at x(PD)=0.2759
Candidate (literature_printed): (Al3Pd) · oP* — printed with a label mapped to this phase
Candidate (sgte_mmc2): (Al3Pd) · Pna2_1 (33) — Hallstedt 2025 mmc2 row for AL3PD: Al3Pd
Stability: stable in 3 of 3 calculated diagram(s): 852.09–1059.13 K, x(Pd) 0.25–0.29958
Literature: 9 values (9 accepted) from 2 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:al-pd:al3pd
paper: paper:10.1016/j.intermet.2005.04.001:Al3Pd, paper:10.3390/met11111803:Al3Pd
tdb: tdb:AlPd-06Li.tdb:AL3PD, tdb:AlPd-17Dur.tdb:AL3PD, tdb:AlPd-21Hom.tdb:AL3PD

TDB models of AL3PD (3): PHASE and CONSTITUENT statements as written

AlPd-06Li.tdb: AL3PD, type code %, sha256 fe0d623a97496170…

50: PHASE AL3PD % 2 3 1 !
51: CONST AL3PD : AL : PD : !

AlPd-17Dur.tdb: AL3PD, type code %, sha256 53154de006cd77b7…

53: PHASE AL3PD % 2 3 1 !
54: CONST AL3PD : AL% PD : AL PD% : !

AlPd-21Hom.tdb: AL3PD, type code %, sha256 16c4c1ecb5dbb2e6…

61: PHASE AL3PD % 2 3 1 !
62: CONST AL3PD : AL : PD : !

Example references (3 of 3; assessments first):

doi:10.1016/j.intermet.2005.04.001 Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Al–Pd system, Intermetallics 14, 39-46 (2006).
assessment that models this phase; reports values for this phase
doi:10.3390/met11111803 Viera Homolová, Aleš Kroupa, Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner, Metals 11, 1803 (2021).
assessment that models this phase; reports values for this phase
doi:10.1088/1742-6596/809/1/012008 Libor Ďuriška, Ivona Černičková, Roman Čička, Jozef Janovec, Contribution to thermodynamic description of Al-Pd system, J. Phys.: Conf. Ser. 809, 012008 (2017).
assessment that models this phase

AL3PD2_D513 (Al–Pd)

Id: phase:al-pd:al3pd2-d513; status assigned
Structure: Ni2Al3 · D5_13 · hP5 · P-3m1 (164); type st:d5-13-ni2al3-hp5; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in AlPd-06Li.tdb also describes the disordered state
Caveat: partitioned order/disorder model in AlPd-17Dur.tdb also describes the disordered state
Caveat: partitioned order/disorder model in AlPd-21Hom.tdb also describes the disordered state
Stability: stable in 3 of 3 calculated diagram(s): 300–1224.51 K, x(Pd) 0.3871–0.4124
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:al-pd:al3pd2-d513
paper: paper:10.1016/j.intermet.2005.04.001:(Al3Pd2)
tdb: tdb:AlPd-06Li.tdb:AL3PD2_D513, tdb:AlPd-17Dur.tdb:AL3PD2_D513, tdb:AlPd-21Hom.tdb:AL3PD2_D513

TDB models of AL3PD2_D513 (3): PHASE and CONSTITUENT statements as written

AlPd-06Li.tdb: AL3PD2_D513, type code %, sha256 fe0d623a97496170…

60: PHASE AL3PD2_D513 % 2 3 2 !
61: CONST AL3PD2_D513 : AL% PD : AL PD% : !

AlPd-17Dur.tdb: AL3PD2_D513, type code %, sha256 53154de006cd77b7…

63: PHASE AL3PD2_D513 % 2 3 2 !
64: CONST AL3PD2_D513 : AL% PD : AL PD% : !

AlPd-21Hom.tdb: AL3PD2_D513, type code %, sha256 16c4c1ecb5dbb2e6…

71: PHASE AL3PD2_D513 % 2 3 2 !
72: CONST AL3PD2_D513 : AL% PD : AL PD% : !

Example references (4 of 4; assessments first):

doi:10.1016/j.intermet.2005.04.001 Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Al–Pd system, Intermetallics 14, 39-46 (2006).
assessment that models this phase; reports values for this phase
doi:10.1088/1742-6596/809/1/012008 Libor Ďuriška, Ivona Černičková, Roman Čička, Jozef Janovec, Contribution to thermodynamic description of Al-Pd system, J. Phys.: Conf. Ser. 809, 012008 (2017).
assessment that models this phase
doi:10.3390/met11111803 Viera Homolová, Aleš Kroupa, Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner, Metals 11, 1803 (2021).
assessment that models this phase
doi:10.1007/bf02873025 McAlister AJ. The Al–Pd system. Bull Alloy Phase Diagram 1986;7: 368–74.
cited as the source of values for this phase

AL3PD5 (Al–Pd)

Id: phase:al-pd:al3pd5; status assigned
Structure: Ge3Rh5 · oP16 · Pbam (55); type st:ge3rh5-op16; 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_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Al 0.3750, Pd 0.6250
Stability: stable in 3 of 3 calculated diagram(s): 880–1592.92 K, x(Pd) 0.625–0.625
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:al-pd:al3pd5
paper: paper:10.1016/j.intermet.2005.04.001:Al3Pd5
tdb: tdb:AlPd-06Li.tdb:AL3PD5, tdb:AlPd-17Dur.tdb:AL3PD5, tdb:AlPd-21Hom.tdb:AL3PD5

TDB models of AL3PD5 (3): PHASE and CONSTITUENT statements as written

AlPd-06Li.tdb: AL3PD5, type code %, sha256 fe0d623a97496170…

70: PHASE AL3PD5 % 2 3 5 !
71: CONST AL3PD5 : AL : PD : !

AlPd-17Dur.tdb: AL3PD5, type code %, sha256 53154de006cd77b7…

73: PHASE AL3PD5 % 2 3 5 !
74: CONST AL3PD5 : AL : PD : !

AlPd-21Hom.tdb: AL3PD5, type code %, sha256 16c4c1ecb5dbb2e6…

76: PHASE AL3PD5 % 2 3 5 !
77: CONST AL3PD5 : AL : PD : !

Example references (4 of 4; assessments first):

doi:10.1016/j.intermet.2005.04.001 Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Al–Pd system, Intermetallics 14, 39-46 (2006).
assessment that models this phase; reports values for this phase
doi:10.1088/1742-6596/809/1/012008 Libor Ďuriška, Ivona Černičková, Roman Čička, Jozef Janovec, Contribution to thermodynamic description of Al-Pd system, J. Phys.: Conf. Ser. 809, 012008 (2017).
assessment that models this phase
doi:10.3390/met11111803 Viera Homolová, Aleš Kroupa, Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner, Metals 11, 1803 (2021).
assessment that models this phase
doi:10.1007/bf02873025 McAlister AJ. The Al–Pd system. Bull Alloy Phase Diagram 1986;7: 368–74.
cited as the source of values for this phase

AL4PD (Al–Pd)

Id: phase:al-pd:al4pd; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (literature_printed): (Al4Pd) · hP* — printed with a label mapped to this phase
Candidate (sgte_mmc2): (Al4Pd) · P6_322 (182) — Hallstedt 2025 mmc2 row for AL4PD: Al4Pd
Stoichiometry: Al 0.8000, Pd 0.2000
Stability: stable in 3 of 3 calculated diagram(s): 300–877.27 K, x(Pd) 0.2–0.2
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:al-pd:al4pd
paper: paper:10.1016/j.intermet.2005.04.001:Al4Pd
tdb: tdb:AlPd-06Li.tdb:AL4PD, tdb:AlPd-17Dur.tdb:AL4PD, tdb:AlPd-21Hom.tdb:AL4PD

TDB models of AL4PD (3): PHASE and CONSTITUENT statements as written

AlPd-06Li.tdb: AL4PD, type code %, sha256 fe0d623a97496170…

45: PHASE AL4PD % 2 4 1 !
46: CONST AL4PD : AL : PD : !

AlPd-17Dur.tdb: AL4PD, type code %, sha256 53154de006cd77b7…

48: PHASE AL4PD % 2 4 1 !
49: CONST AL4PD : AL : PD : !

AlPd-21Hom.tdb: AL4PD, type code %, sha256 16c4c1ecb5dbb2e6…

56: PHASE AL4PD % 2 4 1 !
57: CONST AL4PD : AL : PD : !

Example references (3 of 3; assessments first):

doi:10.1016/j.intermet.2005.04.001 Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Al–Pd system, Intermetallics 14, 39-46 (2006).
assessment that models this phase; reports values for this phase
doi:10.1088/1742-6596/809/1/012008 Libor Ďuriška, Ivona Černičková, Roman Čička, Jozef Janovec, Contribution to thermodynamic description of Al-Pd system, J. Phys.: Conf. Ser. 809, 012008 (2017).
assessment that models this phase
doi:10.3390/met11111803 Viera Homolová, Aleš Kroupa, Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner, Metals 11, 1803 (2021).
assessment that models this phase

ALPD_B2 (Al–Pd)

Id: phase:al-pd:alpd-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 300–1918.84 K, x(Pd) 0.44239–0.57122
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:al-pd:alpd-b2
paper: paper:10.1016/j.intermet.2005.04.001:(AlPd)
tdb: tdb:AlPd-06Li.tdb:ALPD_B2, tdb:AlPd-17Dur.tdb:ALPD_B2

TDB models of ALPD_B2 (2): PHASE and CONSTITUENT statements as written

AlPd-06Li.tdb: ALPD_B2, type code %, sha256 fe0d623a97496170…

65: PHASE ALPD_B2 % 2 1 1 !
66: CONST ALPD_B2 : AL% PD : PD% VA : !

AlPd-17Dur.tdb: ALPD_B2, type code %, sha256 53154de006cd77b7…

68: PHASE ALPD_B2 % 2 1 1 !
69: CONST ALPD_B2 : AL% PD : PD% VA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.intermet.2005.04.001 Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Al–Pd system, Intermetallics 14, 39-46 (2006).
assessment that models this phase; reports values for this phase
doi:10.1088/1742-6596/809/1/012008 Libor Ďuriška, Ivona Černičková, Roman Čička, Jozef Janovec, Contribution to thermodynamic description of Al-Pd system, J. Phys.: Conf. Ser. 809, 012008 (2017).
assessment that models this phase
doi:10.1007/bf02873025 McAlister AJ. The Al–Pd system. Bull Alloy Phase Diagram 1986;7: 368–74.
cited as the source of values for this phase

ALPD2_C37 (Al–Pd)

Id: phase:al-pd:alpd2-c37; status assigned
Structure: Co2Si · C37 · oP12 · Pnma (62); type st:c37-co2si-op12; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in AlPd-06Li.tdb also describes the disordered state
Caveat: partitioned order/disorder model in AlPd-17Dur.tdb also describes the disordered state
Caveat: partitioned order/disorder model in AlPd-21Hom.tdb also describes the disordered state
Stability: stable in 3 of 3 calculated diagram(s): 300–1691.49 K, x(Pd) 0.6465–0.72644
Literature: 12 values (12 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:al-pd:alpd2-c37
paper: paper:10.1016/j.intermet.2005.04.001:(AlPd2)
tdb: tdb:AlPd-06Li.tdb:ALPD2_C37, tdb:AlPd-17Dur.tdb:ALPD2_C37, tdb:AlPd-21Hom.tdb:ALPD2_C37

TDB models of ALPD2_C37 (3): PHASE and CONSTITUENT statements as written

AlPd-06Li.tdb: ALPD2_C37, type code %, sha256 fe0d623a97496170…

80: PHASE ALPD2_C37 % 2 1 2 !
81: CONST ALPD2_C37 : AL% PD : AL PD% : !

AlPd-17Dur.tdb: ALPD2_C37, type code %, sha256 53154de006cd77b7…

83: PHASE ALPD2_C37 % 2 1 2 !
84: CONST ALPD2_C37 : AL% PD : AL PD% : !

AlPd-21Hom.tdb: ALPD2_C37, type code %, sha256 16c4c1ecb5dbb2e6…

86: PHASE ALPD2_C37 % 2 1 2 !
87: CONST ALPD2_C37 : AL% PD : AL PD% : !

Example references (4 of 4; assessments first):

doi:10.1016/j.intermet.2005.04.001 Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Al–Pd system, Intermetallics 14, 39-46 (2006).
assessment that models this phase; reports values for this phase
doi:10.1088/1742-6596/809/1/012008 Libor Ďuriška, Ivona Černičková, Roman Čička, Jozef Janovec, Contribution to thermodynamic description of Al-Pd system, J. Phys.: Conf. Ser. 809, 012008 (2017).
assessment that models this phase
doi:10.3390/met11111803 Viera Homolová, Aleš Kroupa, Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner, Metals 11, 1803 (2021).
assessment that models this phase
doi:10.1007/bf02873025 McAlister AJ. The Al–Pd system. Bull Alloy Phase Diagram 1986;7: 368–74.
cited as the source of values for this phase

BCC_A2 (Al–Pd)

Id: phase:al-pd:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stability: not stable in 3 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:al-pd:bcc-a2
tdb: tdb:AlPd-06Li.tdb:BCC_A2, tdb:AlPd-17Dur.tdb:BCC_A2, tdb:AlPd-21Hom.tdb:A2_BCC, tdb:AlPd-21Hom.tdb:BCC_A2

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

AlPd-06Li.tdb: BCC_A2, type code %B, sha256 fe0d623a97496170…

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

AlPd-17Dur.tdb: BCC_A2, type code %B, sha256 53154de006cd77b7…

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

AlPd-21Hom.tdb: A2_BCC, type code %B, sha256 16c4c1ecb5dbb2e6…

41: PHASE A2_BCC %B 2 1 3 !
42: CONST A2_BCC : AL PD VA : VA : !

AlPd-21Hom.tdb: BCC_A2, type code %B, sha256 16c4c1ecb5dbb2e6…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.intermet.2005.04.001 Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Al–Pd system, Intermetallics 14, 39-46 (2006).
assessment that models this phase
doi:10.1088/1742-6596/809/1/012008 Libor Ďuriška, Ivona Černičková, Roman Čička, Jozef Janovec, Contribution to thermodynamic description of Al-Pd system, J. Phys.: Conf. Ser. 809, 012008 (2017).
assessment that models this phase
doi:10.3390/met11111803 Viera Homolová, Aleš Kroupa, Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner, Metals 11, 1803 (2021).
assessment that models this phase

B2_BCC (Al–Pd)

Id: phase:al-pd:bcc-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Caveat: AlPd-21Hom.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: partitioned order/disorder model in AlPd-21Hom.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–1940.47 K, x(Pd) 0.45766–0.54792
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-pd:bcc-b2
tdb: tdb:AlPd-21Hom.tdb:B2_BCC

TDB models of B2_BCC (1): PHASE and CONSTITUENT statements as written

AlPd-21Hom.tdb: B2_BCC, type code %BO, sha256 16c4c1ecb5dbb2e6…

46: PHASE B2_BCC %BO 3 0.5 0.5 3 !
47: CONST B2_BCC : AL% PD VA : AL PD% VA : VA : !

Example references (1 of 1; assessments first):

doi:10.3390/met11111803 Viera Homolová, Aleš Kroupa, Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner, Metals 11, 1803 (2021).
assessment that models this phase

FCC_A1 (Al–Pd)

Id: phase:al-pd: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): 300–2433 K, x(Pd) 0–1
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:al-pd:fcc-a1
paper: paper:10.1016/j.intermet.2005.04.001:(Al), paper:10.1016/j.intermet.2005.04.001:(Pd)
tdb: tdb:AlPd-06Li.tdb:FCC_A1, tdb:AlPd-17Dur.tdb:FCC_A1, tdb:AlPd-21Hom.tdb:FCC_A1

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

AlPd-06Li.tdb: FCC_A1, type code %A, sha256 fe0d623a97496170…

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

AlPd-17Dur.tdb: FCC_A1, type code %A, sha256 53154de006cd77b7…

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

AlPd-21Hom.tdb: FCC_A1, type code %A, sha256 16c4c1ecb5dbb2e6…

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

Example references (4 of 4; assessments first):

doi:10.1016/j.intermet.2005.04.001 Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Al–Pd system, Intermetallics 14, 39-46 (2006).
assessment that models this phase; reports values for this phase
doi:10.1088/1742-6596/809/1/012008 Libor Ďuriška, Ivona Černičková, Roman Čička, Jozef Janovec, Contribution to thermodynamic description of Al-Pd system, J. Phys.: Conf. Ser. 809, 012008 (2017).
assessment that models this phase
doi:10.3390/met11111803 Viera Homolová, Aleš Kroupa, Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner, Metals 11, 1803 (2021).
assessment that models this phase
doi:10.1007/bf02873025 McAlister AJ. The Al–Pd system. Bull Alloy Phase Diagram 1986;7: 368–74.
cited as the source of values for this phase

HCP_A3 (Al–Pd)

Id: phase:al-pd: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-pd:hcp-a3
tdb: tdb:AlPd-06Li.tdb:HCP_A3, tdb:AlPd-17Dur.tdb:HCP_A3, tdb:AlPd-21Hom.tdb:HCP_A3

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

AlPd-06Li.tdb: HCP_A3, type code %A, sha256 fe0d623a97496170…

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

AlPd-17Dur.tdb: HCP_A3, type code %A, sha256 53154de006cd77b7…

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

AlPd-21Hom.tdb: HCP_A3, type code %A, sha256 16c4c1ecb5dbb2e6…

51: PHASE HCP_A3 %A 2 1 0.5 !
52: CONST HCP_A3 : AL PD : VA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.intermet.2005.04.001 Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Al–Pd system, Intermetallics 14, 39-46 (2006).
assessment that models this phase
doi:10.1088/1742-6596/809/1/012008 Libor Ďuriška, Ivona Černičková, Roman Čička, Jozef Janovec, Contribution to thermodynamic description of Al-Pd system, J. Phys.: Conf. Ser. 809, 012008 (2017).
assessment that models this phase
doi:10.3390/met11111803 Viera Homolová, Aleš Kroupa, Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner, Metals 11, 1803 (2021).
assessment that models this phase

LIQUID (Al–Pd)

Id: phase:al-pd:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 879.9–2500 K, x(Pd) 0–1
Literature: 21 values (21 accepted) from 2 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:al-pd:liquid
paper: paper:10.1016/j.intermet.2005.04.001:L, paper:10.3390/met11111803:liquid
tdb: tdb:AlPd-06Li.tdb:LIQUID, tdb:AlPd-17Dur.tdb:LIQUID, tdb:AlPd-21Hom.tdb:LIQUID

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

AlPd-06Li.tdb: LIQUID, type code %, sha256 fe0d623a97496170…

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

AlPd-17Dur.tdb: LIQUID, type code %, sha256 53154de006cd77b7…

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

AlPd-21Hom.tdb: LIQUID, type code %, sha256 16c4c1ecb5dbb2e6…

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

Example references (4 of 4; assessments first):

doi:10.1016/j.intermet.2005.04.001 Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Al–Pd system, Intermetallics 14, 39-46 (2006).
assessment that models this phase; reports values for this phase
doi:10.3390/met11111803 Viera Homolová, Aleš Kroupa, Thermodynamic Modeling of the Al–Co–Pd Ternary System, Aluminum Rich Corner, Metals 11, 1803 (2021).
assessment that models this phase; reports values for this phase
doi:10.1088/1742-6596/809/1/012008 Libor Ďuriška, Ivona Černičková, Roman Čička, Jozef Janovec, Contribution to thermodynamic description of Al-Pd system, J. Phys.: Conf. Ser. 809, 012008 (2017).
assessment that models this phase
doi:10.1007/bf02873025 McAlister AJ. The Al–Pd system. Bull Alloy Phase Diagram 1986;7: 368–74.
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}
}