Al–Am phases

10 phases (tier A 7, tier C 1, liquid 1, needs_review 1); 9 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–Am system page · Markdown · field reference

Phases of the Al–Am system (10)
Phase	Structure	Basis	Stability (calculated)	TDB models
AL2AM_C15 phase:al-am:al2am-c15	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1876.11 K, x(Am) 0.33333–0.33333	1
AL3AM_L12 phase:al-am:al3am-l12	AuCu3 · L1_2 · cP4 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1635.59 K, x(Am) 0.25–0.25	1
AL4AM_D1B phase:al-am:al4am-d1b	Al4U · D1_b · oI20 · Imma (74)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1203.36 K, x(Am) 0.2–0.2	1
ALAM phase:al-am:alam		needs_review	stable in 1 of 1 calculated diagram(s): 500–1030.05 K, x(Am) 0.5–0.5	1
ALAM3 phase:al-am:alam3	Pb3Sr · tP4 · P4/mmm (123)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–978.13 K, x(Am) 0.75–0.75	1
BCC_A2 phase:al-am:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1350.05–2499.13 K, x(Am) 0.99989–1	1
DHCP phase:al-am:dhcp-a3	alpha-La · A3' · hP4 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1348.13 K, x(Am) 1–1	1
FCC_A1 phase:al-am:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1354.74 K, x(Am) 0–1	1
HCP_A3 phase:al-am:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
LIQUID phase:al-am:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 911.76–2500 K, x(Am) 0–1	1

AL2AM_C15 (Al–Am)

Id: phase:al-am:al2am-c15; status assigned
Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type st:c15-cu2mg-cf24; tier A: standard phase name; confidence high
Stoichiometry: Al 0.6667, Am 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1876.11 K, x(Am) 0.33333–0.33333
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-am:al2am-c15
tdb: tdb:AlAm-16Per.tdb:AL2AM_C15

TDB models of AL2AM_C15 (1): PHASE and CONSTITUENT statements as written

AlAm-16Per.tdb: AL2AM_C15, type code %, sha256 a017cb6517ba77cb…

59: PHASE AL2AM_C15 % 2 2 1 !
60: CONST AL2AM_C15 : AL : AM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2016.09.012 A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).
assessment that models this phase

AL3AM_L12 (Al–Am)

Id: phase:al-am:al3am-l12; status assigned
Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type st:l1-2-aucu3-cp4; tier A: standard phase name; confidence high
Stoichiometry: Al 0.7500, Am 0.2500
Stability: stable in 1 of 1 calculated diagram(s): 300–1635.59 K, x(Am) 0.25–0.25
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-am:al3am-l12
tdb: tdb:AlAm-16Per.tdb:AL3AM_L12

TDB models of AL3AM_L12 (1): PHASE and CONSTITUENT statements as written

AlAm-16Per.tdb: AL3AM_L12, type code %, sha256 a017cb6517ba77cb…

54: PHASE AL3AM_L12 % 2 3 1 !
55: CONST AL3AM_L12 : AL : AM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2016.09.012 A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).
assessment that models this phase

AL4AM_D1B (Al–Am)

Id: phase:al-am:al4am-d1b; status assigned
Structure: Al4U · D1_b · oI20 · Imma (74); type st:d1-b-al4u-oi20; tier A: standard phase name; confidence high
Stoichiometry: Al 0.8000, Am 0.2000
Stability: stable in 1 of 1 calculated diagram(s): 300–1203.36 K, x(Am) 0.2–0.2
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-am:al4am-d1b
tdb: tdb:AlAm-16Per.tdb:AL4AM_D1B

TDB models of AL4AM_D1B (1): PHASE and CONSTITUENT statements as written

AlAm-16Per.tdb: AL4AM_D1B, type code %, sha256 a017cb6517ba77cb…

49: PHASE AL4AM_D1B % 2 4 1 !
50: CONST AL4AM_D1B : AL : AM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2016.09.012 A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).
assessment that models this phase

ALAM (Al–Am)

Id: phase:al-am:alam; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (sgte_mmc2): AlPu · cI58 — Hallstedt 2025 mmc2 row for ALAM: AlAm
Candidate (tdb_comment): — AlAm-16Per.tdb: 'Prototype AlPu (cI58)'
Stoichiometry: Al 0.5000, Am 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 500–1030.05 K, x(Am) 0.5–0.5
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-am:alam
tdb: tdb:AlAm-16Per.tdb:ALAM

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

AlAm-16Per.tdb: ALAM, type code %, sha256 a017cb6517ba77cb…

64: PHASE ALAM % 2 1 1 !
65: CONST ALAM : AL : AM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2016.09.012 A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).
assessment that models this phase

ALAM3 (Al–Am)

Id: phase:al-am:alam3; status assigned
Structure: Pb3Sr · tP4 · P4/mmm (123); type st:pb3sr-tp4; 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 0.2500, Am 0.7500
Stability: stable in 1 of 1 calculated diagram(s): 300–978.13 K, x(Am) 0.75–0.75
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-am:alam3
tdb: tdb:AlAm-16Per.tdb:ALAM3

TDB models of ALAM3 (1): PHASE and CONSTITUENT statements as written

AlAm-16Per.tdb: ALAM3, type code %, sha256 a017cb6517ba77cb…

69: PHASE ALAM3 % 2 1 3 !
70: CONST ALAM3 : AL : AM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2016.09.012 A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).
assessment that models this phase

BCC_A2 (Al–Am)

Id: phase:al-am: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 1 of 1 calculated diagram(s): 1350.05–2499.13 K, x(Am) 0.99989–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-am:bcc-a2
tdb: tdb:AlAm-16Per.tdb:BCC_A2

TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written

AlAm-16Per.tdb: BCC_A2, type code %B, sha256 a017cb6517ba77cb…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : AL AM% : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2016.09.012 A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).
assessment that models this phase

DHCP (Al–Am)

Id: phase:al-am:dhcp-a3; status assigned
Structure: alpha-La · A3' · hP4 · P6_3/mmc (194); type st:a3-alpha-la-hp4; tier A: standard phase name; confidence high
Stoichiometry: Am 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–1348.13 K, x(Am) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-am:dhcp-a3
tdb: tdb:AlAm-16Per.tdb:DHCP

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

AlAm-16Per.tdb: DHCP, type code %, sha256 a017cb6517ba77cb…

44: PHASE DHCP % 1 1 !
45: CONST DHCP : AM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2016.09.012 A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).
assessment that models this phase

FCC_A1 (Al–Am)

Id: phase:al-am: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 1 of 1 calculated diagram(s): 300–1354.74 K, x(Am) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-am:fcc-a1
tdb: tdb:AlAm-16Per.tdb:FCC_A1

TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written

AlAm-16Per.tdb: FCC_A1, type code %A, sha256 a017cb6517ba77cb…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : AL% AM% : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2016.09.012 A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).
assessment that models this phase

HCP_A3 (Al–Am)

Id: phase:al-am:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stoichiometry: Al 1.0000
Stability: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-am:hcp-a3
tdb: tdb:AlAm-16Per.tdb:HCP_A3

TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written

AlAm-16Per.tdb: HCP_A3, type code %A, sha256 a017cb6517ba77cb…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2016.09.012 A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).
assessment that models this phase

LIQUID (Al–Am)

Id: phase:al-am:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 911.76–2500 K, x(Am) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:al-am:liquid
tdb: tdb:AlAm-16Per.tdb:LIQUID

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

AlAm-16Per.tdb: LIQUID, type code %, sha256 a017cb6517ba77cb…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : AL AM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2016.09.012 A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).
assessment that models this phase

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735970
R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23736065

Also cite B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work). Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

@misc{orchid_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_data_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23736065},
  url       = {https://doi.org/10.5281/zenodo.23736065},
  note      = {Version 1, machine-extracted}
}