Ag–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 · Ag–Ba system page · Markdown · field reference

Phases of the Ag–Ba system (8)
Phase	Structure	Basis	Stability (calculated)	TDB models
AG2BA phase:ag-ba:ag2ba	Hg2K · oI12 · Imma (74)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1031.88 K, x(Ba) 0.33333–0.33333	1
AG2BA3 phase:ag-ba:ag2ba3	Er3Ni2 · hR15 · R-3 (148)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–635.83 K, x(Ba) 0.6–0.6	1
AG5BA phase:ag-ba:ag5ba	CaCu5 · D2_d · hP6 · P6/mmm (191)	tier B: DFT-supported (unique MP + OQMD match)	stable in 1 of 1 calculated diagram(s): 300–981.48 K, x(Ba) 0.16667–0.16667	1
AGBA_B27 phase:ag-ba:agba-b27	FeB · B27 · oP8 · Pnma (62)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–837.61 K, x(Ba) 0.5–0.5	1
BCC_A2 phase:ag-ba:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2500 K, x(Ba) 0.99936–1	1
FCC_A1 phase:ag-ba:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1267.02 K, x(Ba) 0–0.00017	1
HCP_A3 phase:ag-ba:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
LIQUID phase:ag-ba:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 604.93–2500 K, x(Ba) 0–1	1

AG2BA (Ag–Ba)

Id: phase:ag-ba:ag2ba; status assigned
Structure: Hg2K · oI12 · Imma (74); type st:hg2k-oi12; 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 (mp_oqmd_space_groups_differ, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ag 0.6667, Ba 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1031.88 K, x(Ba) 0.33333–0.33333
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ag-ba:ag2ba
tdb: tdb:AgBa-95Che-LB.tdb:AG2BA

TDB models of AG2BA (1): PHASE and CONSTITUENT statements as written

AgBa-95Che-LB.tdb: AG2BA, type code %, sha256 d537feedfa4ddf97…

51: PHASE AG2BA % 2 2 1 !
52: CONST AG2BA : AG : BA : !

AG2BA3 (Ag–Ba)

Id: phase:ag-ba:ag2ba3; status assigned
Structure: Er3Ni2 · hR15 · R-3 (148); type st:er3ni2-hr15; 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 (mp_oqmd_space_groups_differ, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ag 0.4000, Ba 0.6000
Stability: stable in 1 of 1 calculated diagram(s): 300–635.83 K, x(Ba) 0.6–0.6
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ag-ba:ag2ba3
tdb: tdb:AgBa-95Che-LB.tdb:AG2BA3

TDB models of AG2BA3 (1): PHASE and CONSTITUENT statements as written

AgBa-95Che-LB.tdb: AG2BA3, type code %, sha256 d537feedfa4ddf97…

61: PHASE AG2BA3 % 2 2 3 !
62: CONST AG2BA3 : AG : BA : !

AG5BA (Ag–Ba)

Id: phase:ag-ba:ag5ba; status assigned
Structure: CaCu5 · D2_d · hP6 · P6/mmm (191); type st:d2-d-cacu5-hp6; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Ag 0.8333, Ba 0.1667
Stability: stable in 1 of 1 calculated diagram(s): 300–981.48 K, x(Ba) 0.16667–0.16667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-ba:ag5ba
mp: mp:mp-aaaaacru
oqmd: oqmd:oqmd-10352
tdb: tdb:AgBa-95Che-LB.tdb:AG5BA

TDB models of AG5BA (1): PHASE and CONSTITUENT statements as written

AgBa-95Che-LB.tdb: AG5BA, type code %, sha256 d537feedfa4ddf97…

46: PHASE AG5BA % 2 5 1 !
47: CONST AG5BA : AG : BA : !

AGBA_B27 (Ag–Ba)

Id: phase:ag-ba:agba-b27; status assigned
Structure: FeB · B27 · oP8 · Pnma (62); type st:b27-feb-op8; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaarnk and oqmd-10350, space group 62
Stoichiometry: Ag 0.5000, Ba 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–837.61 K, x(Ba) 0.5–0.5
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-ba:agba-b27
mp: mp:mp-aaaaarnk
oqmd: oqmd:oqmd-10350
tdb: tdb:AgBa-95Che-LB.tdb:AGBA_B27

TDB models of AGBA_B27 (1): PHASE and CONSTITUENT statements as written

AgBa-95Che-LB.tdb: AGBA_B27, type code %, sha256 d537feedfa4ddf97…

56: PHASE AGBA_B27 % 2 1 1 !
57: CONST AGBA_B27 : AG : BA : !

BCC_A2 (Ag–Ba)

Id: phase:ag-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 1 of 1 calculated diagram(s): 300–2500 K, x(Ba) 0.99936–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ag-ba:bcc-a2
tdb: tdb:AgBa-95Che-LB.tdb:BCC_A2

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

AgBa-95Che-LB.tdb: BCC_A2, type code %B, sha256 d537feedfa4ddf97…

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

FCC_A1 (Ag–Ba)

Id: phase:ag-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 1 of 1 calculated diagram(s): 300–1267.02 K, x(Ba) 0–0.00017
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ag-ba:fcc-a1
tdb: tdb:AgBa-95Che-LB.tdb:FCC_A1

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

AgBa-95Che-LB.tdb: FCC_A1, type code %A, sha256 d537feedfa4ddf97…

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

HCP_A3 (Ag–Ba)

Id: phase:ag-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 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ag-ba:hcp-a3
tdb: tdb:AgBa-95Che-LB.tdb:HCP_A3

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

AgBa-95Che-LB.tdb: HCP_A3, type code %A, sha256 d537feedfa4ddf97…

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

LIQUID (Ag–Ba)

Id: phase:ag-ba:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 604.93–2500 K, x(Ba) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ag-ba:liquid
tdb: tdb:AgBa-95Che-LB.tdb:LIQUID

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

AgBa-95Che-LB.tdb: LIQUID, type code %, sha256 d537feedfa4ddf97…

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

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}
}