# Au–Dy phases

> Au–Dy system: 11 phases (tier A 8, tier C 2, liquid 1); 11 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references.

HTML: https://data.orchid-project.org/phases/pages/AU-DY.html · Markdown: https://data.orchid-project.org/phases/pages/AU-DY.md

11 phases (tier A 8, tier C 2, liquid 1); 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](https://orchid-project.org/phases/?q=AU-DY) · [full JSON](https://data.orchid-project.org/phases/systems/AU-DY.json) · [Au–Dy system page](https://data.orchid-project.org/systems/AU-DY.html) · [Markdown](https://data.orchid-project.org/phases/pages/AU-DY.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Au–Dy system (11)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [AU2DY_C11B](#phase-au-dy-au2dy-c11b); _phase:au-dy:au2dy-c11b_ | MoSi2 · C11_b · tI6 · I4/mmm (139) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 300–1590.67 K, x(Dy) 0.33333–0.33333 | 12 | 3 |
| [AU3DY_D0A](#phase-au-dy-au3dy-d0a); _phase:au-dy:au3dy-d0a_ | beta-Cu3Ti · D0_a · oP8 · Pmmn (59) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 300–1503.52 K, x(Dy) 0.25–0.25 | 12 | 3 |
| [AU51DY14](#phase-au-dy-au51dy14); _phase:au-dy:au51dy14_ | Ag51Gd14 · hP68 · P6/m (175) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 3 of 3 calculated diagram(s): 300–1386.24 K, x(Dy) 0.21538–0.21538 | 8 | 3 |
| [AU6DY](#phase-au-dy-au6dy); _phase:au-dy:au6dy_ | Au6Sm · tP56 · P4_2/ncm (138) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 3 of 3 calculated diagram(s): 300–1120.87 K, x(Dy) 0.14286–0.14286 | 9 | 3 |
| [AUDY_B2](#phase-au-dy-audy-b2); _phase:au-dy:audy-b2_ | CsCl · B2 · cP2 · Pm-3m (221) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 1545.45–1934.61 K, x(Dy) 0.5–0.5 | 8 | 3 |
| [AUDY_B33](#phase-au-dy-audy-b33); _phase:au-dy:audy-b33_ | CrB · B33 · oC8 · Cmcm (63) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 300–1632.65 K, x(Dy) 0.5–0.5 | 12 | 3 |
| [AUDY2_C37](#phase-au-dy-audy2-c37); _phase:au-dy:audy2-c37_ | Co2Si · C37 · oP12 · Pnma (62) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 300–1337.6 K, x(Dy) 0.66667–0.66667 | 8 | 3 |
| [BCC_A2](#phase-au-dy-bcc-a2); _phase:au-dy:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 1654.12–2499.15 K, x(Dy) 0.99999–1 | 0 | 3 |
| [FCC_A1](#phase-au-dy-fcc-a1); _phase:au-dy:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 300–1344.33 K, x(Dy) 0–0.02569 | 7 | 3 |
| [HCP_A3](#phase-au-dy-hcp-a3); _phase:au-dy:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 300–2499.77 K, x(Dy) 1–1 | 4 | 3 |
| [LIQUID](#phase-au-dy-liquid); _phase:au-dy:liquid_ | liquid | liquid | stable in 3 of 3 calculated diagram(s): 1074.38–2500 K, x(Dy) 0–1 | 44 | 3 |

## AU2DY_C11B (Au–Dy)

- Id: `phase:au-dy:au2dy-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: Au 0.6667, Dy 0.3333
- Stability: stable in 3 of 3 calculated diagram(s): 300–1590.67 K, x(Dy) 0.33333–0.33333
- Literature: 12 values (12 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-dy:au2dy-c11b)

Names (6): _corpus: _corpus:phase:au-dy:au2dy-c11b  
_paper: _paper:10.1007/s11669-015-0378-2:Au2Dy, paper:10.1016/j.jallcom.2015.07.002:DyAu2  
_tdb: _tdb:AuDy-15Otm.tdb:AU2DY_C11B, tdb:AuDy-15Wan.tdb:AU2DY_C11B, tdb:AuDy-16Hu.tdb:AU2DY_C11B  


### TDB models of AU2DY_C11B (3): PHASE and CONSTITUENT statements as written

[AuDy-15Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Otm.tdb): AU2DY_C11B, type code %, sha256 `48a184cb465bfbbd…`

~~~~text
70: PHASE AU2DY_C11B % 2 2 1 !
71: CONST AU2DY_C11B : AU : DY : !
~~~~

[AuDy-15Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Wan.tdb): AU2DY_C11B, type code %, sha256 `d2c3c00e5e5016fd…`

~~~~text
60: PHASE AU2DY_C11B % 2 2 1 !
61: CONST AU2DY_C11B : AU : DY : !
~~~~

[AuDy-16Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-16Hu.tdb): AU2DY_C11B, type code %, sha256 `b3ba67828ea04fea…`

~~~~text
57: PHASE AU2DY_C11B % 2 2 1 !
58: CONST AU2DY_C11B : AU : DY : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s11669-015-0378-2](https://doi.org/10.1007/s11669-015-0378-2) S. L. Wang, L. J. Zhou, Z. F. Lan, J. L. Li, Y. H. Lin, C. P. Wang et al., Thermodynamic Assessments of the Au-Nd and Au-Dy Systems, J. Phase Equilib. Diffus. 36, 241-247 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2015.07.002](https://doi.org/10.1016/j.jallcom.2015.07.002) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the dysprosium–gold binary system, Journal of Alloys and Compounds 648, 581-586 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2016.03.003](https://doi.org/10.1016/j.calphad.2016.03.003) B. Hu, J. Wang, Y. Du, Q. Wang, F. Min, Calphad, 53, 49-54(2016).  
_assessment that models this phase_
- [doi:10.1016/0022-5088(73)90144-6](https://doi.org/10.1016/0022-5088%2873%2990144-6) O.D. McMasters, K.A. Gschneidner, Samarium-gold and dysprosium-gold alloy systems, Journal of the Less Common Metals 30, 325-342 (1973).  
_cited as the source of values for this phase_

## AU3DY_D0A (Au–Dy)

- Id: `phase:au-dy:au3dy-d0a`; status `assigned`
- Structure: beta-Cu3Ti · D0_a · oP8 · Pmmn (59); type `st:d0-a-beta-cu3ti-op8`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaacjmne and oqmd-28146, space group 59
- Stoichiometry: Au 0.7500, Dy 0.2500
- Stability: stable in 3 of 3 calculated diagram(s): 300–1503.52 K, x(Dy) 0.25–0.25
- Literature: 12 values (12 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-dy:au3dy-d0a)

Names (8): _corpus: _corpus:phase:au-dy:au3dy-d0a  
_mp: _mp:mp-aaacjmne  
_oqmd: _oqmd:oqmd-28146  
_paper: _paper:10.1007/s11669-015-0378-2:Au3Dy, paper:10.1016/j.jallcom.2015.07.002:DyAu3  
_tdb: _tdb:AuDy-15Otm.tdb:AU3DY_D0A, tdb:AuDy-15Wan.tdb:AU3DY_D0A, tdb:AuDy-16Hu.tdb:AU3DY_D0A  


### TDB models of AU3DY_D0A (3): PHASE and CONSTITUENT statements as written

[AuDy-15Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Otm.tdb): AU3DY_D0A, type code %, sha256 `48a184cb465bfbbd…`

~~~~text
65: PHASE AU3DY_D0A % 2 3 1 !
66: CONST AU3DY_D0A : AU : DY : !
~~~~

[AuDy-15Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Wan.tdb): AU3DY_D0A, type code %, sha256 `d2c3c00e5e5016fd…`

~~~~text
55: PHASE AU3DY_D0A % 2 3 1 !
56: CONST AU3DY_D0A : AU : DY : !
~~~~

[AuDy-16Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-16Hu.tdb): AU3DY_D0A, type code %, sha256 `b3ba67828ea04fea…`

~~~~text
52: PHASE AU3DY_D0A % 2 3 1 !
53: CONST AU3DY_D0A : AU : DY : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s11669-015-0378-2](https://doi.org/10.1007/s11669-015-0378-2) S. L. Wang, L. J. Zhou, Z. F. Lan, J. L. Li, Y. H. Lin, C. P. Wang et al., Thermodynamic Assessments of the Au-Nd and Au-Dy Systems, J. Phase Equilib. Diffus. 36, 241-247 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2015.07.002](https://doi.org/10.1016/j.jallcom.2015.07.002) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the dysprosium–gold binary system, Journal of Alloys and Compounds 648, 581-586 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2016.03.003](https://doi.org/10.1016/j.calphad.2016.03.003) B. Hu, J. Wang, Y. Du, Q. Wang, F. Min, Calphad, 53, 49-54(2016).  
_assessment that models this phase_
- [doi:10.1016/0022-5088(73)90144-6](https://doi.org/10.1016/0022-5088%2873%2990144-6) O.D. McMasters, K.A. Gschneidner, Samarium-gold and dysprosium-gold alloy systems, Journal of the Less Common Metals 30, 325-342 (1973).  
_cited as the source of values for this phase_

## AU51DY14 (Au–Dy)

- Id: `phase:au-dy:au51dy14`; 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](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Au 0.7846, Dy 0.2154
- Stability: stable in 3 of 3 calculated diagram(s): 300–1386.24 K, x(Dy) 0.21538–0.21538
- Literature: 8 values (8 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-dy:au51dy14)

Names (6): _corpus: _corpus:phase:au-dy:au51dy14  
_paper: _paper:10.1007/s11669-015-0378-2:Au51Dy14, paper:10.1016/j.jallcom.2015.07.002:Dy14Au51  
_tdb: _tdb:AuDy-15Otm.tdb:AU51DY14, tdb:AuDy-15Wan.tdb:AU51DY14, tdb:AuDy-16Hu.tdb:AU51DY14  


### TDB models of AU51DY14 (3): PHASE and CONSTITUENT statements as written

[AuDy-15Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Otm.tdb): AU51DY14, type code %, sha256 `48a184cb465bfbbd…`

~~~~text
60: PHASE AU51DY14 % 2 51 14 !
61: CONST AU51DY14 : AU : DY : !
~~~~

[AuDy-15Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Wan.tdb): AU51DY14, type code %, sha256 `d2c3c00e5e5016fd…`

~~~~text
50: PHASE AU51DY14 % 2 51 14 !
51: CONST AU51DY14 : AU : DY : !
~~~~

[AuDy-16Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-16Hu.tdb): AU51DY14, type code %, sha256 `b3ba67828ea04fea…`

~~~~text
47: PHASE AU51DY14 % 2 51 14 !
48: CONST AU51DY14 : AU : DY : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s11669-015-0378-2](https://doi.org/10.1007/s11669-015-0378-2) S. L. Wang, L. J. Zhou, Z. F. Lan, J. L. Li, Y. H. Lin, C. P. Wang et al., Thermodynamic Assessments of the Au-Nd and Au-Dy Systems, J. Phase Equilib. Diffus. 36, 241-247 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2015.07.002](https://doi.org/10.1016/j.jallcom.2015.07.002) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the dysprosium–gold binary system, Journal of Alloys and Compounds 648, 581-586 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2016.03.003](https://doi.org/10.1016/j.calphad.2016.03.003) B. Hu, J. Wang, Y. Du, Q. Wang, F. Min, Calphad, 53, 49-54(2016).  
_assessment that models this phase_
- [doi:10.1016/0022-5088(73)90144-6](https://doi.org/10.1016/0022-5088%2873%2990144-6) O.D. McMasters, K.A. Gschneidner, Samarium-gold and dysprosium-gold alloy systems, Journal of the Less Common Metals 30, 325-342 (1973).  
_cited as the source of values for this phase_

## AU6DY (Au–Dy)

- Id: `phase:au-dy:au6dy`; status `assigned`
- Structure: Au6Sm · tP56 · P4_2/ncm (138); type `st:au6sm-tp56`; 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](https://doi.org/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: Au 0.8571, Dy 0.1429
- Stability: stable in 3 of 3 calculated diagram(s): 300–1120.87 K, x(Dy) 0.14286–0.14286
- Literature: 9 values (9 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-dy:au6dy)

Names (6): _corpus: _corpus:phase:au-dy:au6dy  
_paper: _paper:10.1007/s11669-015-0378-2:Au6Dy, paper:10.1016/j.jallcom.2015.07.002:DyAu6  
_tdb: _tdb:AuDy-15Otm.tdb:AU6DY, tdb:AuDy-15Wan.tdb:AU6DY, tdb:AuDy-16Hu.tdb:AU6DY  


### TDB models of AU6DY (3): PHASE and CONSTITUENT statements as written

[AuDy-15Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Otm.tdb): AU6DY, type code %, sha256 `48a184cb465bfbbd…`

~~~~text
55: PHASE AU6DY % 2 6 1 !
56: CONST AU6DY : AU : DY : !
~~~~

[AuDy-15Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Wan.tdb): AU6DY, type code %, sha256 `d2c3c00e5e5016fd…`

~~~~text
45: PHASE AU6DY % 2 6 1 !
46: CONST AU6DY : AU : DY : !
~~~~

[AuDy-16Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-16Hu.tdb): AU6DY, type code %, sha256 `b3ba67828ea04fea…`

~~~~text
42: PHASE AU6DY % 2 6 1 !
43: CONST AU6DY : AU : DY : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s11669-015-0378-2](https://doi.org/10.1007/s11669-015-0378-2) S. L. Wang, L. J. Zhou, Z. F. Lan, J. L. Li, Y. H. Lin, C. P. Wang et al., Thermodynamic Assessments of the Au-Nd and Au-Dy Systems, J. Phase Equilib. Diffus. 36, 241-247 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2015.07.002](https://doi.org/10.1016/j.jallcom.2015.07.002) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the dysprosium–gold binary system, Journal of Alloys and Compounds 648, 581-586 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2016.03.003](https://doi.org/10.1016/j.calphad.2016.03.003) B. Hu, J. Wang, Y. Du, Q. Wang, F. Min, Calphad, 53, 49-54(2016).  
_assessment that models this phase_
- [doi:10.1016/0022-5088(73)90144-6](https://doi.org/10.1016/0022-5088%2873%2990144-6) O.D. McMasters, K.A. Gschneidner, Samarium-gold and dysprosium-gold alloy systems, Journal of the Less Common Metals 30, 325-342 (1973).  
_cited as the source of values for this phase_

## AUDY_B2 (Au–Dy)

- Id: `phase:au-dy:audy-b2`; status `assigned`
- Structure: CsCl · B2 · cP2 · Pm-3m (221); type `st:b2-cscl-cp2`; tier A: standard phase name; confidence high
- Stoichiometry: Au 0.5000, Dy 0.5000
- Stability: stable in 3 of 3 calculated diagram(s): 1545.45–1934.61 K, x(Dy) 0.5–0.5
- Literature: 8 values (8 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-dy:audy-b2)

Names (6): _corpus: _corpus:phase:au-dy:audy-b2  
_paper: _paper:10.1007/s11669-015-0378-2:βAuDy, paper:10.1016/j.jallcom.2015.07.002:βDyAu  
_tdb: _tdb:AuDy-15Otm.tdb:AUDY_B2, tdb:AuDy-15Wan.tdb:AUDY_B2, tdb:AuDy-16Hu.tdb:AUDY_B2  


### TDB models of AUDY_B2 (3): PHASE and CONSTITUENT statements as written

[AuDy-15Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Otm.tdb): AUDY_B2, type code %, sha256 `48a184cb465bfbbd…`

~~~~text
80: PHASE AUDY_B2 % 2 1 1 !
81: CONST AUDY_B2 : AU : DY : !
~~~~

[AuDy-15Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Wan.tdb): AUDY_B2, type code %, sha256 `d2c3c00e5e5016fd…`

~~~~text
70: PHASE AUDY_B2 % 2 1 1 !
71: CONST AUDY_B2 : AU : DY : !
~~~~

[AuDy-16Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-16Hu.tdb): AUDY_B2, type code %, sha256 `b3ba67828ea04fea…`

~~~~text
67: PHASE AUDY_B2 % 2 1 1 !
68: CONST AUDY_B2 : AU : DY : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s11669-015-0378-2](https://doi.org/10.1007/s11669-015-0378-2) S. L. Wang, L. J. Zhou, Z. F. Lan, J. L. Li, Y. H. Lin, C. P. Wang et al., Thermodynamic Assessments of the Au-Nd and Au-Dy Systems, J. Phase Equilib. Diffus. 36, 241-247 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2015.07.002](https://doi.org/10.1016/j.jallcom.2015.07.002) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the dysprosium–gold binary system, Journal of Alloys and Compounds 648, 581-586 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2016.03.003](https://doi.org/10.1016/j.calphad.2016.03.003) B. Hu, J. Wang, Y. Du, Q. Wang, F. Min, Calphad, 53, 49-54(2016).  
_assessment that models this phase_
- [doi:10.1016/0022-5088(73)90144-6](https://doi.org/10.1016/0022-5088%2873%2990144-6) O.D. McMasters, K.A. Gschneidner, Samarium-gold and dysprosium-gold alloy systems, Journal of the Less Common Metals 30, 325-342 (1973).  
_cited as the source of values for this phase_

## AUDY_B33 (Au–Dy)

- Id: `phase:au-dy:audy-b33`; status `assigned`
- Structure: CrB · B33 · oC8 · Cmcm (63); type `st:b33-crb-oc8`; tier A: standard phase name; confidence high
- Stoichiometry: Au 0.5000, Dy 0.5000
- Stability: stable in 3 of 3 calculated diagram(s): 300–1632.65 K, x(Dy) 0.5–0.5
- Literature: 12 values (12 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-dy:audy-b33)

Names (6): _corpus: _corpus:phase:au-dy:audy-b33  
_paper: _paper:10.1007/s11669-015-0378-2:αAuDy, paper:10.1016/j.jallcom.2015.07.002:αDyAu  
_tdb: _tdb:AuDy-15Otm.tdb:AUDY_B33, tdb:AuDy-15Wan.tdb:AUDY_B33, tdb:AuDy-16Hu.tdb:AUDY_B33  


### TDB models of AUDY_B33 (3): PHASE and CONSTITUENT statements as written

[AuDy-15Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Otm.tdb): AUDY_B33, type code %, sha256 `48a184cb465bfbbd…`

~~~~text
75: PHASE AUDY_B33 % 2 1 1 !
76: CONST AUDY_B33 : AU : DY : !
~~~~

[AuDy-15Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Wan.tdb): AUDY_B33, type code %, sha256 `d2c3c00e5e5016fd…`

~~~~text
65: PHASE AUDY_B33 % 2 1 1 !
66: CONST AUDY_B33 : AU : DY : !
~~~~

[AuDy-16Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-16Hu.tdb): AUDY_B33, type code %, sha256 `b3ba67828ea04fea…`

~~~~text
62: PHASE AUDY_B33 % 2 1 1 !
63: CONST AUDY_B33 : AU : DY : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s11669-015-0378-2](https://doi.org/10.1007/s11669-015-0378-2) S. L. Wang, L. J. Zhou, Z. F. Lan, J. L. Li, Y. H. Lin, C. P. Wang et al., Thermodynamic Assessments of the Au-Nd and Au-Dy Systems, J. Phase Equilib. Diffus. 36, 241-247 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2015.07.002](https://doi.org/10.1016/j.jallcom.2015.07.002) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the dysprosium–gold binary system, Journal of Alloys and Compounds 648, 581-586 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2016.03.003](https://doi.org/10.1016/j.calphad.2016.03.003) B. Hu, J. Wang, Y. Du, Q. Wang, F. Min, Calphad, 53, 49-54(2016).  
_assessment that models this phase_
- [doi:10.1016/0022-5088(73)90144-6](https://doi.org/10.1016/0022-5088%2873%2990144-6) O.D. McMasters, K.A. Gschneidner, Samarium-gold and dysprosium-gold alloy systems, Journal of the Less Common Metals 30, 325-342 (1973).  
_cited as the source of values for this phase_

## AUDY2_C37 (Au–Dy)

- Id: `phase:au-dy:audy2-c37`; status `assigned`
- Structure: Co2Si · C37 · oP12 · Pnma (62); type `st:c37-co2si-op12`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaackugx and oqmd-1800553, space group 62
- Stoichiometry: Au 0.3333, Dy 0.6667
- Stability: stable in 3 of 3 calculated diagram(s): 300–1337.6 K, x(Dy) 0.66667–0.66667
- Literature: 8 values (8 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-dy:audy2-c37)

Names (8): _corpus: _corpus:phase:au-dy:audy2-c37  
_mp: _mp:mp-aaackugx  
_oqmd: _oqmd:oqmd-1800553  
_paper: _paper:10.1007/s11669-015-0378-2:AuDy2, paper:10.1016/j.jallcom.2015.07.002:Dy2Au  
_tdb: _tdb:AuDy-15Otm.tdb:AUDY2_C37, tdb:AuDy-15Wan.tdb:AUDY2_C37, tdb:AuDy-16Hu.tdb:AUDY2_C37  


### TDB models of AUDY2_C37 (3): PHASE and CONSTITUENT statements as written

[AuDy-15Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Otm.tdb): AUDY2_C37, type code %, sha256 `48a184cb465bfbbd…`

~~~~text
85: PHASE AUDY2_C37 % 2 1 2 !
86: CONST AUDY2_C37 : AU : DY : !
~~~~

[AuDy-15Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Wan.tdb): AUDY2_C37, type code %, sha256 `d2c3c00e5e5016fd…`

~~~~text
75: PHASE AUDY2_C37 % 2 1 2 !
76: CONST AUDY2_C37 : AU : DY : !
~~~~

[AuDy-16Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-16Hu.tdb): AUDY2_C37, type code %, sha256 `b3ba67828ea04fea…`

~~~~text
72: PHASE AUDY2_C37 % 2 1 2 !
73: CONST AUDY2_C37 : AU : DY : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s11669-015-0378-2](https://doi.org/10.1007/s11669-015-0378-2) S. L. Wang, L. J. Zhou, Z. F. Lan, J. L. Li, Y. H. Lin, C. P. Wang et al., Thermodynamic Assessments of the Au-Nd and Au-Dy Systems, J. Phase Equilib. Diffus. 36, 241-247 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2015.07.002](https://doi.org/10.1016/j.jallcom.2015.07.002) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the dysprosium–gold binary system, Journal of Alloys and Compounds 648, 581-586 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2016.03.003](https://doi.org/10.1016/j.calphad.2016.03.003) B. Hu, J. Wang, Y. Du, Q. Wang, F. Min, Calphad, 53, 49-54(2016).  
_assessment that models this phase_
- [doi:10.1016/0022-5088(73)90144-6](https://doi.org/10.1016/0022-5088%2873%2990144-6) O.D. McMasters, K.A. Gschneidner, Samarium-gold and dysprosium-gold alloy systems, Journal of the Less Common Metals 30, 325-342 (1973).  
_cited as the source of values for this phase_

## BCC_A2 (Au–Dy)

- Id: `phase:au-dy: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): 1654.12–2499.15 K, x(Dy) 0.99999–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-dy:bcc-a2)

Names (4): _corpus: _corpus:phase:au-dy:bcc-a2  
_tdb: _tdb:AuDy-15Otm.tdb:BCC_A2, tdb:AuDy-15Wan.tdb:BCC_A2, tdb:AuDy-16Hu.tdb:BCC_A2  


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

[AuDy-15Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Otm.tdb): BCC_A2, type code %B, sha256 `48a184cb465bfbbd…`

~~~~text
45: PHASE BCC_A2 %B 2 1 3 !
46: CONST BCC_A2 : AU DY% : VA : !
~~~~

[AuDy-15Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Wan.tdb): BCC_A2, type code %B, sha256 `d2c3c00e5e5016fd…`

~~~~text
35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : AU DY% : VA : !
~~~~

[AuDy-16Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-16Hu.tdb): BCC_A2, type code %B, sha256 `b3ba67828ea04fea…`

~~~~text
32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : AU DY% : VA : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1007/s11669-015-0378-2](https://doi.org/10.1007/s11669-015-0378-2) S. L. Wang, L. J. Zhou, Z. F. Lan, J. L. Li, Y. H. Lin, C. P. Wang et al., Thermodynamic Assessments of the Au-Nd and Au-Dy Systems, J. Phase Equilib. Diffus. 36, 241-247 (2015).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2016.03.003](https://doi.org/10.1016/j.calphad.2016.03.003) B. Hu, J. Wang, Y. Du, Q. Wang, F. Min, Calphad, 53, 49-54(2016).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2015.07.002](https://doi.org/10.1016/j.jallcom.2015.07.002) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the dysprosium–gold binary system, Journal of Alloys and Compounds 648, 581-586 (2015).  
_assessment that models this phase_

## FCC_A1 (Au–Dy)

- Id: `phase:au-dy: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): 300–1344.33 K, x(Dy) 0–0.02569
- Literature: 7 values (7 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-dy:fcc-a1)

Names (6): _corpus: _corpus:phase:au-dy:fcc-a1  
_paper: _paper:10.1007/s11669-015-0378-2:(Au), paper:10.1016/j.jallcom.2015.07.002:Au  
_tdb: _tdb:AuDy-15Otm.tdb:FCC_A1, tdb:AuDy-15Wan.tdb:FCC_A1, tdb:AuDy-16Hu.tdb:FCC_A1  


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

[AuDy-15Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Otm.tdb): FCC_A1, type code %A, sha256 `48a184cb465bfbbd…`

~~~~text
40: PHASE FCC_A1 %A 2 1 1 !
41: CONST FCC_A1 : AU% DY : VA : !
~~~~

[AuDy-15Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Wan.tdb): FCC_A1, type code %A, sha256 `d2c3c00e5e5016fd…`

~~~~text
30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : AU% DY : VA : !
~~~~

[AuDy-16Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-16Hu.tdb): FCC_A1, type code %A, sha256 `b3ba67828ea04fea…`

~~~~text
27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : AU% DY : VA : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.jallcom.2015.07.002](https://doi.org/10.1016/j.jallcom.2015.07.002) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the dysprosium–gold binary system, Journal of Alloys and Compounds 648, 581-586 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-015-0378-2](https://doi.org/10.1007/s11669-015-0378-2) S. L. Wang, L. J. Zhou, Z. F. Lan, J. L. Li, Y. H. Lin, C. P. Wang et al., Thermodynamic Assessments of the Au-Nd and Au-Dy Systems, J. Phase Equilib. Diffus. 36, 241-247 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2016.03.003](https://doi.org/10.1016/j.calphad.2016.03.003) B. Hu, J. Wang, Y. Du, Q. Wang, F. Min, Calphad, 53, 49-54(2016).  
_assessment that models this phase_
- [doi:10.1016/0022-5088(73)90144-6](https://doi.org/10.1016/0022-5088%2873%2990144-6) O.D. McMasters, K.A. Gschneidner, Samarium-gold and dysprosium-gold alloy systems, Journal of the Less Common Metals 30, 325-342 (1973).  
_cited as the source of values for this phase_

## HCP_A3 (Au–Dy)

- Id: `phase:au-dy: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 3 of 3 calculated diagram(s): 300–2499.77 K, x(Dy) 1–1
- Literature: 4 values (4 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-dy:hcp-a3)

Names (6): _corpus: _corpus:phase:au-dy:hcp-a3  
_paper: _paper:10.1007/s11669-015-0378-2:αDy, paper:10.1016/j.jallcom.2015.07.002:αDy  
_tdb: _tdb:AuDy-15Otm.tdb:HCP_A3, tdb:AuDy-15Wan.tdb:HCP_A3, tdb:AuDy-16Hu.tdb:HCP_A3  


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

[AuDy-15Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Otm.tdb): HCP_A3, type code %A, sha256 `48a184cb465bfbbd…`

~~~~text
50: PHASE HCP_A3 %A 2 1 0.5 !
51: CONST HCP_A3 : AU DY% : VA : !
~~~~

[AuDy-15Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Wan.tdb): HCP_A3, type code %A, sha256 `d2c3c00e5e5016fd…`

~~~~text
40: PHASE HCP_A3 %A 2 1 0.5 !
41: CONST HCP_A3 : AU DY% : VA : !
~~~~

[AuDy-16Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-16Hu.tdb): HCP_A3, type code %A, sha256 `b3ba67828ea04fea…`

~~~~text
37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : AU DY% : VA : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s11669-015-0378-2](https://doi.org/10.1007/s11669-015-0378-2) S. L. Wang, L. J. Zhou, Z. F. Lan, J. L. Li, Y. H. Lin, C. P. Wang et al., Thermodynamic Assessments of the Au-Nd and Au-Dy Systems, J. Phase Equilib. Diffus. 36, 241-247 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2015.07.002](https://doi.org/10.1016/j.jallcom.2015.07.002) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the dysprosium–gold binary system, Journal of Alloys and Compounds 648, 581-586 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2016.03.003](https://doi.org/10.1016/j.calphad.2016.03.003) B. Hu, J. Wang, Y. Du, Q. Wang, F. Min, Calphad, 53, 49-54(2016).  
_assessment that models this phase_
- [doi:10.1016/0022-5088(73)90144-6](https://doi.org/10.1016/0022-5088%2873%2990144-6) O.D. McMasters, K.A. Gschneidner, Samarium-gold and dysprosium-gold alloy systems, Journal of the Less Common Metals 30, 325-342 (1973).  
_cited as the source of values for this phase_

## LIQUID (Au–Dy)

- Id: `phase:au-dy:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 3 of 3 calculated diagram(s): 1074.38–2500 K, x(Dy) 0–1
- Literature: 44 values (44 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-dy:liquid)

Names (7): _corpus: _corpus:phase:au-dy:liquid  
_paper: _paper:10.1007/s11669-015-0378-2:L, paper:10.1016/j.jallcom.2015.07.002:L, paper:10.1016/j.jallcom.2015.07.002:liquid  
_tdb: _tdb:AuDy-15Otm.tdb:LIQUID, tdb:AuDy-15Wan.tdb:LIQUID, tdb:AuDy-16Hu.tdb:LIQUID  


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

[AuDy-15Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Otm.tdb): LIQUID, type code %, sha256 `48a184cb465bfbbd…`

~~~~text
35: PHASE LIQUID:L % 1 1 !
36: CONST LIQUID:L : AU DY : !
~~~~

[AuDy-15Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-15Wan.tdb): LIQUID, type code %, sha256 `d2c3c00e5e5016fd…`

~~~~text
25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : AU DY : !
~~~~

[AuDy-16Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/AuDy-16Hu.tdb): LIQUID, type code %, sha256 `b3ba67828ea04fea…`

~~~~text
22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : AU DY : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.jallcom.2015.07.002](https://doi.org/10.1016/j.jallcom.2015.07.002) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the dysprosium–gold binary system, Journal of Alloys and Compounds 648, 581-586 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-015-0378-2](https://doi.org/10.1007/s11669-015-0378-2) S. L. Wang, L. J. Zhou, Z. F. Lan, J. L. Li, Y. H. Lin, C. P. Wang et al., Thermodynamic Assessments of the Au-Nd and Au-Dy Systems, J. Phase Equilib. Diffus. 36, 241-247 (2015).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2016.03.003](https://doi.org/10.1016/j.calphad.2016.03.003) B. Hu, J. Wang, Y. Du, Q. Wang, F. Min, Calphad, 53, 49-54(2016).  
_assessment that models this phase_
- [doi:10.1016/0022-5088(73)90144-6](https://doi.org/10.1016/0022-5088%2873%2990144-6) O.D. McMasters, K.A. Gschneidner, Samarium-gold and dysprosium-gold alloy systems, Journal of the Less Common Metals 30, 325-342 (1973).  
_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). https://doi.org/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). https://doi.org/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.

```bibtex
@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}
}
```

---

Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).