# Dy–Ni phases

> Dy–Ni system: 14 phases (tier A 7, tier C 3, liquid 1, needs_review 3); 14 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/DY-NI.html · Markdown: https://data.orchid-project.org/phases/pages/DY-NI.md

14 phases (tier A 7, tier C 3, liquid 1, needs_review 3); 14 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=DY-NI) · [full JSON](https://data.orchid-project.org/phases/systems/DY-NI.json) · [Dy–Ni system page](https://data.orchid-project.org/systems/DY-NI.html) · [Markdown](https://data.orchid-project.org/phases/pages/DY-NI.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Dy–Ni system (14)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [BCC_A2](#phase-dy-ni-bcc-a2); _phase:dy-ni:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 1654.15–1689.15 K, x(Ni) 0–0 | 0 | 2 |
| [DY2NI17](#phase-dy-ni-dy2ni17); _phase:dy-ni:dy2ni17_ | Ni17Th2 · hP38 · P6_3/mmc (194) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1586.39 K, x(Ni) 0.89474–0.89474 | 4 | 2 |
| [DY2NI7](#phase-dy-ni-dy2ni7); _phase:dy-ni:dy2ni7_ |  | needs_review | stable in 2 of 2 calculated diagram(s): 300–1579.78 K, x(Ni) 0.77778–0.77778 | 5 | 2 |
| [DY3NI_D011](#phase-dy-ni-dy3ni-d011); _phase:dy-ni:dy3ni-d011_ | Fe3C · D0_11 · oP16 · Pnma (62) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1051.62 K, x(Ni) 0.25–0.25 | 4 | 2 |
| [DY3NI2](#phase-dy-ni-dy3ni2); _phase:dy-ni:dy3ni2_ | Dy3Ni2 · mC20 · C2/m (12) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1217.74 K, x(Ni) 0.4–0.4 | 5 | 2 |
| [DY4NI17](#phase-dy-ni-dy4ni17); _phase:dy-ni:dy4ni17_ |  | needs_review | stable in 2 of 2 calculated diagram(s): 300–1625.15 K, x(Ni) 0.80952–0.80952 | 4 | 2 |
| [DYNI_B27](#phase-dy-ni-dyni-b27); _phase:dy-ni:dyni-b27_ | FeB · B27 · oP8 · Pnma (62) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1532.01 K, x(Ni) 0.5–0.5 | 6 | 2 |
| [DYNI2_C15](#phase-dy-ni-dyni2-c15); _phase:dy-ni:dyni2-c15_ | Cu2Mg · C15 · cF24 · Fd-3m (227) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1560.51 K, x(Ni) 0.66667–0.66667 | 5 | 2 |
| [DYNI3](#phase-dy-ni-dyni3); _phase:dy-ni:dyni3_ | Ni3Pu · hR12 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1555.14 K, x(Ni) 0.75–0.75 | 5 | 2 |
| [DYNI4](#phase-dy-ni-dyni4); _phase:dy-ni:dyni4_ |  | needs_review | stable in 2 of 2 calculated diagram(s): 300–1608.95 K, x(Ni) 0.8–0.8 | 5 | 2 |
| [DYNI5_D2D](#phase-dy-ni-dyni5-d2d); _phase:dy-ni:dyni5-d2d_ | CaCu5 · D2_d · hP6 · P6/mmm (191) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1668.71 K, x(Ni) 0.83333–0.83333 | 6 | 2 |
| [FCC_A1](#phase-dy-ni-fcc-a1); _phase:dy-ni:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2499.49 K, x(Ni) 1–1 | 2 | 2 |
| [HCP_A3](#phase-dy-ni-hcp-a3); _phase:dy-ni:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1659 K, x(Ni) 0–0 | 2 | 2 |
| [LIQUID](#phase-dy-ni-liquid); _phase:dy-ni:liquid_ | liquid | liquid | stable in 2 of 2 calculated diagram(s): 969.98–2500 K, x(Ni) 0–1 | 27 | 2 |

## BCC_A2 (Dy–Ni)

- Id: `phase:dy-ni:bcc-a2`; status `assigned`
- Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high
- Stoichiometry: Dy 1.0000
- Stability: stable in 2 of 2 calculated diagram(s): 1654.15–1689.15 K, x(Ni) 0–0
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:bcc-a2)

Names (3): _corpus: _corpus:phase:dy-ni:bcc-a2  
_tdb: _tdb:DyNi-09Li-newDy.tdb:BCC_A2, tdb:DyNi-09Li.tdb:BCC_A2  


### TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): BCC_A2, type code %B, sha256 `0488ea299b6a97c7…`

~~~~text
39: PHASE BCC_A2 %B 2 1 3 !
40: CONST BCC_A2 : DY : VA : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): BCC_A2, type code %B, sha256 `b48694e780426b9f…`

~~~~text
39: PHASE BCC_A2 %B 2 1 3 !
40: CONST BCC_A2 : DY : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase_

## DY2NI17 (Dy–Ni)

- Id: `phase:dy-ni:dy2ni17`; status `assigned`
- Structure: Ni17Th2 · hP38 · P6_3/mmc (194); type `st:ni17th2-hp38`; 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: Dy 0.1053, Ni 0.8947
- Stability: stable in 2 of 2 calculated diagram(s): 300–1586.39 K, x(Ni) 0.89474–0.89474
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:dy2ni17)

Names (4): _corpus: _corpus:phase:dy-ni:dy2ni17  
_paper: _paper:10.1016/j.calphad.2009.03.004:Dy2Ni17  
_tdb: _tdb:DyNi-09Li-newDy.tdb:DY2NI17, tdb:DyNi-09Li.tdb:DY2NI17  


### TDB models of DY2NI17 (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): DY2NI17, type code %, sha256 `0488ea299b6a97c7…`

~~~~text
94: PHASE DY2NI17 % 2 2 17 !
95: CONST DY2NI17 : DY : NI : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): DY2NI17, type code %, sha256 `b48694e780426b9f…`

~~~~text
94: PHASE DY2NI17 % 2 2 17 !
95: CONST DY2NI17 : DY : NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports values for this phase_

## DY2NI7 (Dy–Ni)

- Id: `phase:dy-ni:dy2ni7`; status `needs_review`
- No structure assigned. Why: mp_oqmd_space_groups_differ; no_structure_token; sgte_mmc2_rows_disagree
- Candidate (dft_mp): R-3m (166) — on-hull MP Dy2Ni7 at x(NI)=0.7778
- Candidate (dft_oqmd): P63/mmc (194) — on-hull OQMD Dy2 Ni7 at x(NI)=0.7778
- Candidate (literature_printed): Ce2Ni7 · hP36 — printed with a label mapped to this phase
- Candidate (sgte_mmc2): Ce2Ni7 · hP36 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for DY2NI7: Dy2Ni7 (high T), see also Co7Gd2
- Candidate (sgte_mmc2): Co7Gd2 · hR18 · R-3m (166) — Hallstedt 2025 mmc2 row for DY2NI7: Dy2Ni7 (low T), see also Ce2Ni7
- Candidate (tdb_comment): Co7Gd2 · hR18 · R-3m, low T — DyNi-09Li-newDy.tdb: 'Prototype Co7Gd2 (hR18, R-3m, low T) and Ce2Ni7 (hP36, P6_3/mmc, high T)'
- Candidate (tdb_comment): Co7Gd2 · hR18 · R-3m, low T — DyNi-09Li.tdb: 'Prototype Co7Gd2 (hR18, R-3m, low T) and Ce2Ni7 (hP36, P6_3/mmc, high T)'
- Stoichiometry: Dy 0.2222, Ni 0.7778
- Stability: stable in 2 of 2 calculated diagram(s): 300–1579.78 K, x(Ni) 0.77778–0.77778
- Literature: 5 values (5 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:dy2ni7)

Names (4): _corpus: _corpus:phase:dy-ni:dy2ni7  
_paper: _paper:10.1016/j.calphad.2009.03.004:Dy2Ni7  
_tdb: _tdb:DyNi-09Li-newDy.tdb:DY2NI7, tdb:DyNi-09Li.tdb:DY2NI7  


### TDB models of DY2NI7 (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): DY2NI7, type code %, sha256 `0488ea299b6a97c7…`

~~~~text
74: PHASE DY2NI7 % 2 2 7 !
75: CONST DY2NI7 : DY : NI : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): DY2NI7, type code %, sha256 `b48694e780426b9f…`

~~~~text
74: PHASE DY2NI7 % 2 2 7 !
75: CONST DY2NI7 : DY : NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports values for this phase_

## DY3NI_D011 (Dy–Ni)

- Id: `phase:dy-ni:dy3ni-d011`; status `assigned`
- Structure: Fe3C · D0_11 · oP16 · Pnma (62); type `st:d0-11-fe3c-op16`; tier A: standard phase name; confidence high
- Stoichiometry: Dy 0.7500, Ni 0.2500
- Stability: stable in 2 of 2 calculated diagram(s): 300–1051.62 K, x(Ni) 0.25–0.25
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:dy3ni-d011)

Names (4): _corpus: _corpus:phase:dy-ni:dy3ni-d011  
_paper: _paper:10.1016/j.calphad.2009.03.004:Dy3Ni  
_tdb: _tdb:DyNi-09Li-newDy.tdb:DY3NI_D011, tdb:DyNi-09Li.tdb:DY3NI_D011  


### TDB models of DY3NI_D011 (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): DY3NI_D011, type code %, sha256 `0488ea299b6a97c7…`

~~~~text
49: PHASE DY3NI_D011 % 2 3 1 !
50: CONST DY3NI_D011 : DY : NI : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): DY3NI_D011, type code %, sha256 `b48694e780426b9f…`

~~~~text
49: PHASE DY3NI_D011 % 2 3 1 !
50: CONST DY3NI_D011 : DY : NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports values for this phase_

## DY3NI2 (Dy–Ni)

- Id: `phase:dy-ni:dy3ni2`; status `assigned`
- Structure: Dy3Ni2 · mC20 · C2/m (12); type `st:dy3ni2-mc20`; 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: Dy 0.6000, Ni 0.4000
- Stability: stable in 2 of 2 calculated diagram(s): 300–1217.74 K, x(Ni) 0.4–0.4
- Literature: 5 values (5 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:dy3ni2)

Names (4): _corpus: _corpus:phase:dy-ni:dy3ni2  
_paper: _paper:10.1016/j.calphad.2009.03.004:Dy3Ni2  
_tdb: _tdb:DyNi-09Li-newDy.tdb:DY3NI2, tdb:DyNi-09Li.tdb:DY3NI2  


### TDB models of DY3NI2 (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): DY3NI2, type code %, sha256 `0488ea299b6a97c7…`

~~~~text
54: PHASE DY3NI2 % 2 3 2 !
55: CONST DY3NI2 : DY : NI : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): DY3NI2, type code %, sha256 `b48694e780426b9f…`

~~~~text
54: PHASE DY3NI2 % 2 3 2 !
55: CONST DY3NI2 : DY : NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports values for this phase_

## DY4NI17 (Dy–Ni)

- Id: `phase:dy-ni:dy4ni17`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (literature_printed): (Dy4Ni17) · ? — printed with a label mapped to this phase
- Candidate (sgte_mmc2): (Dy4Ni17) — Hallstedt 2025 mmc2 row for DY4NI17: Dy4Ni17 (may not exist)
- Stoichiometry: Dy 0.1905, Ni 0.8095
- Stability: stable in 2 of 2 calculated diagram(s): 300–1625.15 K, x(Ni) 0.80952–0.80952
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:dy4ni17)

Names (4): _corpus: _corpus:phase:dy-ni:dy4ni17  
_paper: _paper:10.1016/j.calphad.2009.03.004:Dy4Ni17  
_tdb: _tdb:DyNi-09Li-newDy.tdb:DY4NI17, tdb:DyNi-09Li.tdb:DY4NI17  


### TDB models of DY4NI17 (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): DY4NI17, type code %, sha256 `0488ea299b6a97c7…`

~~~~text
84: PHASE DY4NI17 % 2 4 17 !
85: CONST DY4NI17 : DY : NI : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): DY4NI17, type code %, sha256 `b48694e780426b9f…`

~~~~text
84: PHASE DY4NI17 % 2 4 17 !
85: CONST DY4NI17 : DY : NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports values for this phase_

## DYNI_B27 (Dy–Ni)

- Id: `phase:dy-ni:dyni-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-aaaaaebi and oqmd-89117, space group 62
- Stoichiometry: Dy 0.5000, Ni 0.5000
- Stability: stable in 2 of 2 calculated diagram(s): 300–1532.01 K, x(Ni) 0.5–0.5
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:dyni-b27)

Names (6): _corpus: _corpus:phase:dy-ni:dyni-b27  
_mp: _mp:mp-aaaaaebi  
_oqmd: _oqmd:oqmd-89117  
_paper: _paper:10.1016/j.calphad.2009.03.004:DyNi  
_tdb: _tdb:DyNi-09Li-newDy.tdb:DYNI_B27, tdb:DyNi-09Li.tdb:DYNI_B27  


### TDB models of DYNI_B27 (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): DYNI_B27, type code %, sha256 `0488ea299b6a97c7…`

~~~~text
59: PHASE DYNI_B27 % 2 1 1 !
60: CONST DYNI_B27 : DY : NI : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): DYNI_B27, type code %, sha256 `b48694e780426b9f…`

~~~~text
59: PHASE DYNI_B27 % 2 1 1 !
60: CONST DYNI_B27 : DY : NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports values for this phase_

## DYNI2_C15 (Dy–Ni)

- Id: `phase:dy-ni:dyni2-c15`; status `assigned`
- Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type `st:c15-cu2mg-cf24`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaaaaaqf and oqmd-19331, space group 227
- Stoichiometry: Dy 0.3333, Ni 0.6667
- Stability: stable in 2 of 2 calculated diagram(s): 300–1560.51 K, x(Ni) 0.66667–0.66667
- Literature: 5 values (5 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:dyni2-c15)

Names (6): _corpus: _corpus:phase:dy-ni:dyni2-c15  
_mp: _mp:mp-aaaaaaqf  
_oqmd: _oqmd:oqmd-19331  
_paper: _paper:10.1016/j.calphad.2009.03.004:DyNi2  
_tdb: _tdb:DyNi-09Li-newDy.tdb:DYNI2_C15, tdb:DyNi-09Li.tdb:DYNI2_C15  


### TDB models of DYNI2_C15 (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): DYNI2_C15, type code %, sha256 `0488ea299b6a97c7…`

~~~~text
64: PHASE DYNI2_C15 % 2 1 2 !
65: CONST DYNI2_C15 : DY : NI : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): DYNI2_C15, type code %, sha256 `b48694e780426b9f…`

~~~~text
64: PHASE DYNI2_C15 % 2 1 2 !
65: CONST DYNI2_C15 : DY : NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports values for this phase_

## DYNI3 (Dy–Ni)

- Id: `phase:dy-ni:dyni3`; status `assigned`
- Structure: Ni3Pu · hR12 · R-3m (166); type `st:ni3pu-hr12`; 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 (dft_space_group_166_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Dy 0.2500, Ni 0.7500
- Stability: stable in 2 of 2 calculated diagram(s): 300–1555.14 K, x(Ni) 0.75–0.75
- Literature: 5 values (5 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:dyni3)

Names (4): _corpus: _corpus:phase:dy-ni:dyni3  
_paper: _paper:10.1016/j.calphad.2009.03.004:DyNi3  
_tdb: _tdb:DyNi-09Li-newDy.tdb:DYNI3, tdb:DyNi-09Li.tdb:DYNI3  


### TDB models of DYNI3 (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): DYNI3, type code %, sha256 `0488ea299b6a97c7…`

~~~~text
69: PHASE DYNI3 % 2 1 3 !
70: CONST DYNI3 : DY : NI : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): DYNI3, type code %, sha256 `b48694e780426b9f…`

~~~~text
69: PHASE DYNI3 % 2 1 3 !
70: CONST DYNI3 : DY : NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports values for this phase_

## DYNI4 (Dy–Ni)

- Id: `phase:dy-ni:dyni4`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (literature_printed): (DyNi4) · ? — printed with a label mapped to this phase
- Candidate (sgte_mmc2): (DyNi4) — Hallstedt 2025 mmc2 row for DYNI4: DyNi4 (may not exist)
- Stoichiometry: Dy 0.2000, Ni 0.8000
- Stability: stable in 2 of 2 calculated diagram(s): 300–1608.95 K, x(Ni) 0.8–0.8
- Literature: 5 values (5 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:dyni4)

Names (4): _corpus: _corpus:phase:dy-ni:dyni4  
_paper: _paper:10.1016/j.calphad.2009.03.004:DyNi4  
_tdb: _tdb:DyNi-09Li-newDy.tdb:DYNI4, tdb:DyNi-09Li.tdb:DYNI4  


### TDB models of DYNI4 (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): DYNI4, type code %, sha256 `0488ea299b6a97c7…`

~~~~text
79: PHASE DYNI4 % 2 1 4 !
80: CONST DYNI4 : DY : NI : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): DYNI4, type code %, sha256 `b48694e780426b9f…`

~~~~text
79: PHASE DYNI4 % 2 1 4 !
80: CONST DYNI4 : DY : NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports values for this phase_

## DYNI5_D2D (Dy–Ni)

- Id: `phase:dy-ni:dyni5-d2d`; status `assigned`
- Structure: CaCu5 · D2_d · hP6 · P6/mmm (191); type `st:d2-d-cacu5-hp6`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaaaabtj and oqmd-29892, space group 191
- Stoichiometry: Dy 0.1667, Ni 0.8333
- Stability: stable in 2 of 2 calculated diagram(s): 300–1668.71 K, x(Ni) 0.83333–0.83333
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:dyni5-d2d)

Names (6): _corpus: _corpus:phase:dy-ni:dyni5-d2d  
_mp: _mp:mp-aaaaabtj  
_oqmd: _oqmd:oqmd-29892  
_paper: _paper:10.1016/j.calphad.2009.03.004:DyNi5  
_tdb: _tdb:DyNi-09Li-newDy.tdb:DYNI5_D2D, tdb:DyNi-09Li.tdb:DYNI5_D2D  


### TDB models of DYNI5_D2D (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): DYNI5_D2D, type code %, sha256 `0488ea299b6a97c7…`

~~~~text
89: PHASE DYNI5_D2D % 2 1 5 !
90: CONST DYNI5_D2D : DY : NI : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): DYNI5_D2D, type code %, sha256 `b48694e780426b9f…`

~~~~text
89: PHASE DYNI5_D2D % 2 1 5 !
90: CONST DYNI5_D2D : DY : NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports values for this phase_

## FCC_A1 (Dy–Ni)

- Id: `phase:dy-ni:fcc-a1`; status `assigned`
- Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high
- Stoichiometry: Ni 1.0000
- Stability: stable in 2 of 2 calculated diagram(s): 300–2499.49 K, x(Ni) 1–1
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:fcc-a1)

Names (4): _corpus: _corpus:phase:dy-ni:fcc-a1  
_paper: _paper:10.1016/j.calphad.2009.03.004:(Ni)  
_tdb: _tdb:DyNi-09Li-newDy.tdb:FCC_A1, tdb:DyNi-09Li.tdb:FCC_A1  


### TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): FCC_A1, type code %A, sha256 `0488ea299b6a97c7…`

~~~~text
34: PHASE FCC_A1 %A 2 1 1 !
35: CONST FCC_A1 : NI : VA : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): FCC_A1, type code %A, sha256 `b48694e780426b9f…`

~~~~text
34: PHASE FCC_A1 %A 2 1 1 !
35: CONST FCC_A1 : NI : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports values for this phase_

## HCP_A3 (Dy–Ni)

- Id: `phase:dy-ni: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: Dy 1.0000
- Stability: stable in 2 of 2 calculated diagram(s): 300–1659 K, x(Ni) 0–0
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:hcp-a3)

Names (4): _corpus: _corpus:phase:dy-ni:hcp-a3  
_paper: _paper:10.1016/j.calphad.2009.03.004:(αDy)  
_tdb: _tdb:DyNi-09Li-newDy.tdb:HCP_A3, tdb:DyNi-09Li.tdb:HCP_A3  


### TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): HCP_A3, type code %, sha256 `0488ea299b6a97c7…`

~~~~text
44: PHASE HCP_A3 % 2 1 0.5 !
45: CONST HCP_A3 : DY : VA : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): HCP_A3, type code %, sha256 `b48694e780426b9f…`

~~~~text
44: PHASE HCP_A3 % 2 1 0.5 !
45: CONST HCP_A3 : DY : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports values for this phase_

## LIQUID (Dy–Ni)

- Id: `phase:dy-ni:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 969.98–2500 K, x(Ni) 0–1
- Literature: 27 values (27 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:dy-ni:liquid)

Names (4): _corpus: _corpus:phase:dy-ni:liquid  
_paper: _paper:10.1016/j.calphad.2009.03.004:L  
_tdb: _tdb:DyNi-09Li-newDy.tdb:LIQUID, tdb:DyNi-09Li.tdb:LIQUID  


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

[DyNi-09Li-newDy.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li-newDy.tdb): LIQUID, type code %, sha256 `0488ea299b6a97c7…`

~~~~text
29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : DY NI : !
~~~~

[DyNi-09Li.tdb](https://orchid-project.org/data/databases/sgte-binary/DyNi-09Li.tdb): LIQUID, type code %, sha256 `b48694e780426b9f…`

~~~~text
29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : DY NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.03.004](https://doi.org/10.1016/j.calphad.2009.03.004) Mei Li, Wei Han, Thermodynamic description of the Dy–Ni system, Calphad 33, 517-520 (2009).  
_assessment that models this phase; reports 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).