Ag–Ho phases

7 phases (tier A 5, tier C 1, liquid 1); 6 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–Ho system page · Markdown · field reference

Phases of the Ag–Ho system (7)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
AG2HO_C11B phase:ag-ho:ag2ho-c11b	MoSi2 · C11_b · tI6 · I4/mmm (139)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1261.38 K, x(Ho) 0.33333–0.33333	9	1
AG51HO14 phase:ag-ho:ag51ho14	Ag51Gd14 · hP68 · P6/m (175)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1190.65 K, x(Ho) 0.21538–0.22011	11	1
AGHO_B2 phase:ag-ho:agho-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1437.79 K, x(Ho) 0.5–0.5	9	1
BCC_A2 phase:ag-ho:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
FCC_A1 phase:ag-ho:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1243.84 K, x(Ho) 0–0.01447	5	1
HCP_A3 phase:ag-ho:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2499.51 K, x(Ho) 0.99999–1	3	1
LIQUID phase:ag-ho:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1068.84–2500 K, x(Ho) 0–1	23	1

AG2HO_C11B (Ag–Ho)

Id: phase:ag-ho:ag2ho-c11b; status assigned
Structure: MoSi2 · C11_b · tI6 · I4/mmm (139); type st:c11-b-mosi2-ti6; tier A: standard phase name; confidence high
Stoichiometry: Ag 0.6667, Ho 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1261.38 K, x(Ho) 0.33333–0.33333
Literature: 9 values (9 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-ho:ag2ho-c11b
paper: paper:10.1016/j.jallcom.2009.04.037:Ag2Ho
tdb: tdb:AgHo-09Wan.tdb:AG2HO_C11B

TDB models of AG2HO_C11B (1): PHASE and CONSTITUENT statements as written

AgHo-09Wan.tdb: AG2HO_C11B, type code %, sha256 f36e10e15718ddcc…

50: PHASE AG2HO_C11B % 2 2 1 !
51: CONST AG2HO_C11B : AG : HO : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.04.037 S.L. Wang, C.P. Wang, X.J. Liu, A.T. Tang, F.S. Pan, K. Ishida, Thermodynamic assessments of the Ag–Tb and Ag–Ho systems, Journal of Alloys and Compounds 484, 102-107 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02869230 K.A. Gschneidner Jr., F.W. Calderwood, Bull. Alloy Phase Diagrams 6 (2) (1985) 144–145.
cited as the source of values for this phase
doi:10.1016/0022-5088(66)90079-8 E. Gebhardt, M. Von Erdberg, Das system Silber-Holmium, Journal of the Less Common Metals 11, 141-147 (1966).
cited as the source of values for this phase

AG51HO14 (Ag–Ho)

Id: phase:ag-ho:ag51ho14; status assigned
Structure: Ag51Gd14 · hP68 · P6/m (175); type st:ag51gd14-hp68; 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): 300–1190.65 K, x(Ho) 0.21538–0.22011
Literature: 11 values (11 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-ho:ag51ho14
paper: paper:10.1016/j.jallcom.2009.04.037:Ag51Ho14
tdb: tdb:AgHo-09Wan.tdb:AG51HO14

TDB models of AG51HO14 (1): PHASE and CONSTITUENT statements as written

AgHo-09Wan.tdb: AG51HO14, type code %, sha256 f36e10e15718ddcc…

45: PHASE AG51HO14 % 2 51 14 !
46: CONST AG51HO14 : AG% HO : HO : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.04.037 S.L. Wang, C.P. Wang, X.J. Liu, A.T. Tang, F.S. Pan, K. Ishida, Thermodynamic assessments of the Ag–Tb and Ag–Ho systems, Journal of Alloys and Compounds 484, 102-107 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02869230 K.A. Gschneidner Jr., F.W. Calderwood, Bull. Alloy Phase Diagrams 6 (2) (1985) 144–145.
cited as the source of values for this phase
doi:10.1016/0022-5088(66)90079-8 E. Gebhardt, M. Von Erdberg, Das system Silber-Holmium, Journal of the Less Common Metals 11, 141-147 (1966).
cited as the source of values for this phase

AGHO_B2 (Ag–Ho)

Id: phase:ag-ho:agho-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaaecw and oqmd-17486, space group 221
Stoichiometry: Ag 0.5000, Ho 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1437.79 K, x(Ho) 0.5–0.5
Literature: 9 values (9 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ag-ho:agho-b2
mp: mp:mp-aaaaaecw
oqmd: oqmd:oqmd-17486
paper: paper:10.1016/j.jallcom.2009.04.037:AgHo
tdb: tdb:AgHo-09Wan.tdb:AGHO_B2

TDB models of AGHO_B2 (1): PHASE and CONSTITUENT statements as written

AgHo-09Wan.tdb: AGHO_B2, type code %A, sha256 f36e10e15718ddcc…

55: PHASE AGHO_B2 %A 2 1 1 !
56: CONST AGHO_B2 : AG : HO : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.04.037 S.L. Wang, C.P. Wang, X.J. Liu, A.T. Tang, F.S. Pan, K. Ishida, Thermodynamic assessments of the Ag–Tb and Ag–Ho systems, Journal of Alloys and Compounds 484, 102-107 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02869230 K.A. Gschneidner Jr., F.W. Calderwood, Bull. Alloy Phase Diagrams 6 (2) (1985) 144–145.
cited as the source of values for this phase
doi:10.1016/0022-5088(66)90079-8 E. Gebhardt, M. Von Erdberg, Das system Silber-Holmium, Journal of the Less Common Metals 11, 141-147 (1966).
cited as the source of values for this phase

BCC_A2 (Ag–Ho)

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

Names (2): corpus: corpus:phase:ag-ho:bcc-a2
tdb: tdb:AgHo-09Wan.tdb:BCC_A2

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

AgHo-09Wan.tdb: BCC_A2, type code %B, sha256 f36e10e15718ddcc…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2009.04.037 S.L. Wang, C.P. Wang, X.J. Liu, A.T. Tang, F.S. Pan, K. Ishida, Thermodynamic assessments of the Ag–Tb and Ag–Ho systems, Journal of Alloys and Compounds 484, 102-107 (2009).
assessment that models this phase

FCC_A1 (Ag–Ho)

Id: phase:ag-ho: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): 300–1243.84 K, x(Ho) 0–0.01447
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-ho:fcc-a1
paper: paper:10.1016/j.jallcom.2009.04.037:(Ag)
tdb: tdb:AgHo-09Wan.tdb:FCC_A1

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

AgHo-09Wan.tdb: FCC_A1, type code %A, sha256 f36e10e15718ddcc…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.04.037 S.L. Wang, C.P. Wang, X.J. Liu, A.T. Tang, F.S. Pan, K. Ishida, Thermodynamic assessments of the Ag–Tb and Ag–Ho systems, Journal of Alloys and Compounds 484, 102-107 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02869230 K.A. Gschneidner Jr., F.W. Calderwood, Bull. Alloy Phase Diagrams 6 (2) (1985) 144–145.
cited as the source of values for this phase
doi:10.1016/0022-5088(66)90079-8 E. Gebhardt, M. Von Erdberg, Das system Silber-Holmium, Journal of the Less Common Metals 11, 141-147 (1966).
cited as the source of values for this phase

HCP_A3 (Ag–Ho)

Id: phase:ag-ho: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: stable in 1 of 1 calculated diagram(s): 300–2499.51 K, x(Ho) 0.99999–1
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-ho:hcp-a3
paper: paper:10.1016/j.jallcom.2009.04.037:(Ho)
tdb: tdb:AgHo-09Wan.tdb:HCP_A3

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

AgHo-09Wan.tdb: HCP_A3, type code %A, sha256 f36e10e15718ddcc…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.04.037 S.L. Wang, C.P. Wang, X.J. Liu, A.T. Tang, F.S. Pan, K. Ishida, Thermodynamic assessments of the Ag–Tb and Ag–Ho systems, Journal of Alloys and Compounds 484, 102-107 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02869230 K.A. Gschneidner Jr., F.W. Calderwood, Bull. Alloy Phase Diagrams 6 (2) (1985) 144–145.
cited as the source of values for this phase
doi:10.1016/0022-5088(66)90079-8 E. Gebhardt, M. Von Erdberg, Das system Silber-Holmium, Journal of the Less Common Metals 11, 141-147 (1966).
cited as the source of values for this phase

LIQUID (Ag–Ho)

Id: phase:ag-ho:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1068.84–2500 K, x(Ho) 0–1
Literature: 23 values (23 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-ho:liquid
paper: paper:10.1016/j.jallcom.2009.04.037:L
tdb: tdb:AgHo-09Wan.tdb:LIQUID

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

AgHo-09Wan.tdb: LIQUID, type code %, sha256 f36e10e15718ddcc…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.04.037 S.L. Wang, C.P. Wang, X.J. Liu, A.T. Tang, F.S. Pan, K. Ishida, Thermodynamic assessments of the Ag–Tb and Ag–Ho systems, Journal of Alloys and Compounds 484, 102-107 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02869230 K.A. Gschneidner Jr., F.W. Calderwood, Bull. Alloy Phase Diagrams 6 (2) (1985) 144–145.
cited as the source of values for this phase
doi:10.1016/0022-5088(66)90079-8 E. Gebhardt, M. Von Erdberg, Das system Silber-Holmium, Journal of the Less Common Metals 11, 141-147 (1966).
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}
}