# Nd–Ni phases

> Nd–Ni system: 15 phases (tier A 9, tier C 4, liquid 1, needs_review 1); 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/ND-NI.html · Markdown: https://data.orchid-project.org/phases/pages/ND-NI.md

15 phases (tier A 9, tier C 4, liquid 1, needs_review 1); 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=ND-NI) · [full JSON](https://data.orchid-project.org/phases/systems/ND-NI.json) · [Nd–Ni system page](https://data.orchid-project.org/systems/ND-NI.html) · [Markdown](https://data.orchid-project.org/phases/pages/ND-NI.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Nd–Ni system (15)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [BCC_A2](#phase-nd-ni-bcc-a2); _phase:nd-ni:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 1128–1293.04 K, x(Ni) 0–0.0001 | 10 | 4 |
| [DHCP](#phase-nd-ni-dhcp-a3); _phase:nd-ni:dhcp-a3_ | alpha-La · A3' · hP4 · P6_3/mmc (194) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–1128.04 K, x(Ni) 0–9e-05 | 11 | 4 |
| [FCC_A1](#phase-nd-ni-fcc-a1); _phase:nd-ni:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–2499.94 K, x(Ni) 0.99956–1 | 5 | 4 |
| [HCP_A3](#phase-nd-ni-hcp-a3); _phase:nd-ni:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | not stable in 4 calculated diagram(s) | 0 | 4 |
| [LIQUID](#phase-nd-ni-liquid); _phase:nd-ni:liquid_ | liquid | liquid | stable in 4 of 4 calculated diagram(s): 800.56–2500 K, x(Ni) 0–1 | 85 | 4 |
| [ND2NI17](#phase-nd-ni-nd2ni17); _phase:nd-ni:nd2ni17_ | Ni17Th2 · hP38 · P6_3/mmc (194) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 4 of 4 calculated diagram(s): 1519.7–1572.74 K, x(Ni) 0.89474–0.89474 | 7 | 4 |
| [ND2NI7](#phase-nd-ni-nd2ni7); _phase:nd-ni:nd2ni7_ |  | needs_review | stable in 3 of 3 calculated diagram(s): 300–1466.2 K, x(Ni) 0.77778–0.77778 | 0 | 3 |
| [ND2NI7_HT](#phase-nd-ni-nd2ni7-ht); _phase:nd-ni:nd2ni7-ht_ | Ce2Ni7 · hP36 · P6_3/mmc (194) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 1444.36–1464.6 K, x(Ni) 0.77778–0.77778 | 5 | 1 |
| [ND2NI7_LT](#phase-nd-ni-nd2ni7-lt); _phase:nd-ni:nd2ni7-lt_ | Co7Gd2 · hR18 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1444.36 K, x(Ni) 0.77778–0.77778 | 7 | 1 |
| [ND3NI_D011](#phase-nd-ni-nd3ni-d011); _phase:nd-ni:nd3ni-d011_ | Fe3C · D0_11 · oP16 · Pnma (62) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–892.72 K, x(Ni) 0.25–0.25 | 33 | 4 |
| [ND7NI3_D102](#phase-nd-ni-nd7ni3-d102); _phase:nd-ni:nd7ni3-d102_ | Fe3Th7 · D10_2 · hP20 · P6_3mc (186) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–873.81 K, x(Ni) 0.3–0.3 | 22 | 4 |
| [NDNI_B33](#phase-nd-ni-ndni-b33); _phase:nd-ni:ndni-b33_ | CrB · B33 · oC8 · Cmcm (63) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–1096.8 K, x(Ni) 0.5–0.5 | 25 | 4 |
| [NDNI2_C15](#phase-nd-ni-ndni2-c15); _phase:nd-ni:ndni2-c15_ | Cu2Mg · C15 · cF24 · Fd-3m (227) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–1236.86 K, x(Ni) 0.66667–0.66667 | 6 | 4 |
| [NDNI3](#phase-nd-ni-ndni3); _phase:nd-ni:ndni3_ | Ni3Pu · hR12 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 4 of 4 calculated diagram(s): 300–1341.3 K, x(Ni) 0.75–0.75 | 6 | 4 |
| [NDNI5_D2D](#phase-nd-ni-ndni5-d2d); _phase:nd-ni:ndni5-d2d_ | CaCu5 · D2_d · hP6 · P6/mmm (191) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–1689.66 K, x(Ni) 0.83333–0.83333 | 12 | 4 |

## BCC_A2 (Nd–Ni)

- Id: `phase:nd-ni: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 4 of 4 calculated diagram(s): 1128–1293.04 K, x(Ni) 0–0.0001
- Literature: 10 values (10 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:bcc-a2)

Names (7): _corpus: _corpus:phase:nd-ni:bcc-a2  
_paper: _paper:10.1007/s10853-022-08039-1:bcc(Nd), paper:10.1016/j.jallcom.2005.02.037:bcc (Nd)  
_tdb: _tdb:NdNi-05Hua.tdb:BCC_A2, tdb:NdNi-15Luo.tdb:BCC_A2, tdb:NdNi-23Ye.tdb:BCC_A2, tdb:NdNi-96Du.tdb:BCC_A2  


### TDB models of BCC_A2 (4): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): BCC_A2, type code %B, sha256 `75472194c597523e…`

~~~~text
30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : ND% NI : VA : !
~~~~

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): BCC_A2, type code %B, sha256 `3f57a2103568896d…`

~~~~text
38: PHASE BCC_A2 %B 2 1 3 !
39: CONST BCC_A2 : ND% NI : VA : !
~~~~

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): BCC_A2, type code %B, sha256 `14b046601bb540bc…`

~~~~text
32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : ND% NI : VA : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): BCC_A2, type code %B, sha256 `40296ac12169d5af…`

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

Example references (4 of 4; assessments first): 

- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_assessment that models this phase_

## DHCP (Nd–Ni)

- Id: `phase:nd-ni: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
- Stability: stable in 4 of 4 calculated diagram(s): 300–1128.04 K, x(Ni) 0–9e-05
- Literature: 11 values (11 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:dhcp-a3)

Names (8): _corpus: _corpus:phase:nd-ni:dhcp-a3, corpus:phase:nd-ni:dhcp  
_paper: _paper:10.1007/s10853-022-08039-1:dhcp(Nd), paper:10.1016/j.jallcom.2005.02.037:dhcp (Nd)  
_tdb: _tdb:NdNi-05Hua.tdb:DHCP, tdb:NdNi-15Luo.tdb:DHCP, tdb:NdNi-23Ye.tdb:DHCP, tdb:NdNi-96Du.tdb:DHCP  


### TDB models of DHCP (4): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): DHCP, type code %, sha256 `75472194c597523e…`

~~~~text
40: PHASE DHCP % 1 1 !
41: CONST DHCP : ND% NI : !
~~~~

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): DHCP, type code %, sha256 `3f57a2103568896d…`

~~~~text
48: PHASE DHCP % 1 1 !
49: CONST DHCP : ND% NI : !
~~~~

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): DHCP, type code %, sha256 `14b046601bb540bc…`

~~~~text
42: PHASE DHCP % 1 1 !
43: CONST DHCP : ND% NI : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): DHCP, type code %, sha256 `40296ac12169d5af…`

~~~~text
49: PHASE DHCP % 1 1 !
50: CONST DHCP : ND% NI : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_assessment that models this phase_

## FCC_A1 (Nd–Ni)

- Id: `phase:nd-ni: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 4 of 4 calculated diagram(s): 300–2499.94 K, x(Ni) 0.99956–1
- Literature: 5 values (5 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:fcc-a1)

Names (6): _corpus: _corpus:phase:nd-ni:fcc-a1  
_paper: _paper:10.1016/j.jallcom.2005.02.037:fcc (Ni)  
_tdb: _tdb:NdNi-05Hua.tdb:FCC_A1, tdb:NdNi-15Luo.tdb:FCC_A1, tdb:NdNi-23Ye.tdb:FCC_A1, tdb:NdNi-96Du.tdb:FCC_A1  


### TDB models of FCC_A1 (4): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): FCC_A1, type code %A, sha256 `75472194c597523e…`

~~~~text
25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : ND NI% : VA : !
~~~~

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): FCC_A1, type code %A, sha256 `3f57a2103568896d…`

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

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): FCC_A1, type code %A, sha256 `14b046601bb540bc…`

~~~~text
27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : ND NI% : VA : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): FCC_A1, type code %A, sha256 `40296ac12169d5af…`

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

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_assessment that models this phase_

## HCP_A3 (Nd–Ni)

- Id: `phase:nd-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
- Stability: not stable in 4 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:hcp-a3)

Names (5): _corpus: _corpus:phase:nd-ni:hcp-a3  
_tdb: _tdb:NdNi-05Hua.tdb:HCP_A3, tdb:NdNi-15Luo.tdb:HCP_A3, tdb:NdNi-23Ye.tdb:HCP_A3, tdb:NdNi-96Du.tdb:HCP_A3  


### TDB models of HCP_A3 (4): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): HCP_A3, type code %A, sha256 `75472194c597523e…`

~~~~text
35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : ND NI : VA : !
~~~~

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): HCP_A3, type code %A, sha256 `3f57a2103568896d…`

~~~~text
43: PHASE HCP_A3 %A 2 1 0.5 !
44: CONST HCP_A3 : ND NI : VA : !
~~~~

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): HCP_A3, type code %A, sha256 `14b046601bb540bc…`

~~~~text
37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : ND NI : VA : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): HCP_A3, type code %A, sha256 `40296ac12169d5af…`

~~~~text
44: PHASE HCP_A3 %A 2 1 0.5 !
45: CONST HCP_A3 : ND NI : VA : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_assessment that models this phase_

## LIQUID (Nd–Ni)

- Id: `phase:nd-ni:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 4 of 4 calculated diagram(s): 800.56–2500 K, x(Ni) 0–1
- Literature: 85 values (85 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:liquid)

Names (7): _corpus: _corpus:phase:nd-ni:liquid  
_paper: _paper:10.1007/s10853-022-08039-1:L, paper:10.1016/j.jallcom.2005.02.037:Liquid  
_tdb: _tdb:NdNi-05Hua.tdb:LIQUID, tdb:NdNi-15Luo.tdb:LIQUID, tdb:NdNi-23Ye.tdb:LIQUID, tdb:NdNi-96Du.tdb:LIQUID  


### TDB models of LIQUID (4): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): LIQUID, type code %, sha256 `75472194c597523e…`

~~~~text
20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : ND NI : !
~~~~

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): LIQUID, type code %, sha256 `3f57a2103568896d…`

~~~~text
28: PHASE LIQUID:L % 1 1 !
29: CONST LIQUID:L : ND NI : !
~~~~

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): LIQUID, type code %, sha256 `14b046601bb540bc…`

~~~~text
22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : ND NI : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): LIQUID, type code %, sha256 `40296ac12169d5af…`

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

Example references (4 of 4; assessments first): 

- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_assessment that models this phase_

## ND2NI17 (Nd–Ni)

- Id: `phase:nd-ni:nd2ni17`; 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: Nd 0.1053, Ni 0.8947
- Stability: stable in 4 of 4 calculated diagram(s): 1519.7–1572.74 K, x(Ni) 0.89474–0.89474
- Literature: 7 values (7 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:nd2ni17)

Names (6): _corpus: _corpus:phase:nd-ni:nd2ni17  
_paper: _paper:10.1016/j.jallcom.2005.02.037:Nd2Ni17  
_tdb: _tdb:NdNi-05Hua.tdb:ND2NI17, tdb:NdNi-15Luo.tdb:ND2NI17, tdb:NdNi-23Ye.tdb:ND2NI17, tdb:NdNi-96Du.tdb:ND2NI17  


### TDB models of ND2NI17 (4): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): ND2NI17, type code %, sha256 `75472194c597523e…`

~~~~text
85: PHASE ND2NI17 % 2 2 17 !
86: CONST ND2NI17 : ND : NI : !
~~~~

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): ND2NI17, type code %, sha256 `3f57a2103568896d…`

~~~~text
88: PHASE ND2NI17 % 2 2 17 !
89: CONST ND2NI17 : ND : NI : !
~~~~

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): ND2NI17, type code %, sha256 `14b046601bb540bc…`

~~~~text
82: PHASE ND2NI17 % 2 2 17 !
83: CONST ND2NI17 : ND : NI : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): ND2NI17, type code %, sha256 `40296ac12169d5af…`

~~~~text
89: PHASE ND2NI17 % 2 2 17 !
90: CONST ND2NI17 : ND : NI : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_assessment that models this phase_

## ND2NI7 (Nd–Ni)

- Id: `phase:nd-ni:nd2ni7`; status `needs_review`
- No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition; sgte_mmc2_rows_disagree
- Candidate (dft_oqmd): P63/mmc (194) — on-hull OQMD Nd2 Ni7 at x(NI)=0.7778
- Candidate (sgte_mmc2): Ce2Ni7 · hP36 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for ND2NI7: Nd2Ni7 (high T), see also Co7Gd2
- Candidate (sgte_mmc2): Co7Gd2 · hR18 · R-3m (166) — Hallstedt 2025 mmc2 row for ND2NI7: Nd2Ni7 (low T), see also Ce2Ni7
- Candidate (tdb_comment): Ce2Ni7 · hP36 · P6_3/mmc — NdNi-15Luo.tdb: 'Prototype Ce2Ni7 (hP36, P6_3/mmc) and Co7Gd2 (hR18, R-3m)'
- Candidate (tdb_comment): Ce2Ni7 · hP36 · P6_3/mmc — NdNi-23Ye.tdb: 'Prototype Ce2Ni7 (hP36, P6_3/mmc) and Co7Gd2 (hR18, R-3m)'
- Candidate (tdb_comment): Ce2Ni7 · hP36 · P6_3/mmc — NdNi-96Du.tdb: 'Prototype Ce2Ni7 (hP36, P6_3/mmc) and Co7Gd2 (hR18, R-3m)'
- Stoichiometry: Nd 0.2222, Ni 0.7778
- Stability: stable in 3 of 3 calculated diagram(s): 300–1466.2 K, x(Ni) 0.77778–0.77778
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:nd2ni7)

Names (4): _corpus: _corpus:phase:nd-ni:nd2ni7  
_tdb: _tdb:NdNi-15Luo.tdb:ND2NI7, tdb:NdNi-23Ye.tdb:ND2NI7, tdb:NdNi-96Du.tdb:ND2NI7  


### TDB models of ND2NI7 (3): PHASE and CONSTITUENT statements as written

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): ND2NI7, type code %, sha256 `3f57a2103568896d…`

~~~~text
78: PHASE ND2NI7 % 2 2 7 !
79: CONST ND2NI7 : ND : NI : !
~~~~

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): ND2NI7, type code %, sha256 `14b046601bb540bc…`

~~~~text
72: PHASE ND2NI7 % 2 2 7 !
73: CONST ND2NI7 : ND : NI : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): ND2NI7, type code %, sha256 `40296ac12169d5af…`

~~~~text
79: PHASE ND2NI7 % 2 2 7 !
80: CONST ND2NI7 : ND : NI : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_assessment that models this phase_

## ND2NI7_HT (Nd–Ni)

- Id: `phase:nd-ni:nd2ni7-ht`; status `assigned`
- Structure: Ce2Ni7 · hP36 · P6_3/mmc (194); type `st:ce2ni7-hp36`; 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_structure_token, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Nd 0.2222, Ni 0.7778
- Stability: stable in 1 of 1 calculated diagram(s): 1444.36–1464.6 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:nd-ni:nd2ni7-ht)

Names (3): _corpus: _corpus:phase:nd-ni:nd2ni7-ht  
_paper: _paper:10.1016/j.jallcom.2005.02.037:βNd2Ni7  
_tdb: _tdb:NdNi-05Hua.tdb:ND2NI7_HT  


### TDB models of ND2NI7_HT (1): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): ND2NI7_HT, type code %, sha256 `75472194c597523e…`

~~~~text
75: PHASE ND2NI7_HT % 2 2 7 !
76: CONST ND2NI7_HT : ND : NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_

## ND2NI7_LT (Nd–Ni)

- Id: `phase:nd-ni:nd2ni7-lt`; status `assigned`
- Structure: Co7Gd2 · hR18 · R-3m (166); type `st:co7gd2-hr18`; 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_structure_token, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Nd 0.2222, Ni 0.7778
- Stability: stable in 1 of 1 calculated diagram(s): 300–1444.36 K, x(Ni) 0.77778–0.77778
- Literature: 7 values (7 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:nd2ni7-lt)

Names (3): _corpus: _corpus:phase:nd-ni:nd2ni7-lt  
_paper: _paper:10.1016/j.jallcom.2005.02.037:αNd2Ni7  
_tdb: _tdb:NdNi-05Hua.tdb:ND2NI7_LT  


### TDB models of ND2NI7_LT (1): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): ND2NI7_LT, type code %, sha256 `75472194c597523e…`

~~~~text
70: PHASE ND2NI7_LT % 2 2 7 !
71: CONST ND2NI7_LT : ND : NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_

## ND3NI_D011 (Nd–Ni)

- Id: `phase:nd-ni:nd3ni-d011`; status `assigned`
- Structure: Fe3C · D0_11 · oP16 · Pnma (62); type `st:d0-11-fe3c-op16`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaacppsa and oqmd-30793, space group 62
- Stoichiometry: Nd 0.7500, Ni 0.2500
- Stability: stable in 4 of 4 calculated diagram(s): 300–892.72 K, x(Ni) 0.25–0.25
- Literature: 33 values (33 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:nd3ni-d011)

Names (9): _corpus: _corpus:phase:nd-ni:nd3ni-d011  
_mp: _mp:mp-aaacppsa  
_oqmd: _oqmd:oqmd-30793  
_paper: _paper:10.1007/s10853-022-08039-1:Nd3Ni, paper:10.1016/j.jallcom.2005.02.037:Nd3Ni  
_tdb: _tdb:NdNi-05Hua.tdb:ND3NI_D011, tdb:NdNi-15Luo.tdb:ND3NI_D011, tdb:NdNi-23Ye.tdb:ND3NI_D011, tdb:NdNi-96Du.tdb:ND3NI_D011  


### TDB models of ND3NI_D011 (4): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): ND3NI_D011, type code %, sha256 `75472194c597523e…`

~~~~text
45: PHASE ND3NI_D011 % 2 3 1 !
46: CONST ND3NI_D011 : ND : NI : !
~~~~

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): ND3NI_D011, type code %, sha256 `3f57a2103568896d…`

~~~~text
53: PHASE ND3NI_D011 % 2 3 1 !
54: CONST ND3NI_D011 : ND : NI : !
~~~~

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): ND3NI_D011, type code %, sha256 `14b046601bb540bc…`

~~~~text
47: PHASE ND3NI_D011 % 2 3 1 !
48: CONST ND3NI_D011 : ND : NI : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): ND3NI_D011, type code %, sha256 `40296ac12169d5af…`

~~~~text
54: PHASE ND3NI_D011 % 2 3 1 !
55: CONST ND3NI_D011 : ND : NI : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_assessment that models this phase_

## ND7NI3_D102 (Nd–Ni)

- Id: `phase:nd-ni:nd7ni3-d102`; status `assigned`
- Structure: Fe3Th7 · D10_2 · hP20 · P6_3mc (186); type `st:d10-2-fe3th7-hp20`; tier A: standard phase name; confidence high
- Stoichiometry: Nd 0.7000, Ni 0.3000
- Stability: stable in 4 of 4 calculated diagram(s): 300–873.81 K, x(Ni) 0.3–0.3
- Literature: 22 values (22 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:nd7ni3-d102)

Names (7): _corpus: _corpus:phase:nd-ni:nd7ni3-d102  
_paper: _paper:10.1007/s10853-022-08039-1:Nd7Ni3, paper:10.1016/j.jallcom.2005.02.037:Nd7Ni3  
_tdb: _tdb:NdNi-05Hua.tdb:ND7NI3_D102, tdb:NdNi-15Luo.tdb:ND7NI3_D102, tdb:NdNi-23Ye.tdb:ND7NI3_D102, tdb:NdNi-96Du.tdb:ND7NI3_D102  


### TDB models of ND7NI3_D102 (4): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): ND7NI3_D102, type code %, sha256 `75472194c597523e…`

~~~~text
50: PHASE ND7NI3_D102 % 2 7 3 !
51: CONST ND7NI3_D102 : ND : NI : !
~~~~

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): ND7NI3_D102, type code %, sha256 `3f57a2103568896d…`

~~~~text
58: PHASE ND7NI3_D102 % 2 7 3 !
59: CONST ND7NI3_D102 : ND : NI : !
~~~~

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): ND7NI3_D102, type code %, sha256 `14b046601bb540bc…`

~~~~text
52: PHASE ND7NI3_D102 % 2 7 3 !
53: CONST ND7NI3_D102 : ND : NI : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): ND7NI3_D102, type code %, sha256 `40296ac12169d5af…`

~~~~text
59: PHASE ND7NI3_D102 % 2 7 3 !
60: CONST ND7NI3_D102 : ND : NI : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_assessment that models this phase_

## NDNI_B33 (Nd–Ni)

- Id: `phase:nd-ni:ndni-b33`; status `assigned`
- Structure: CrB · B33 · oC8 · Cmcm (63); type `st:b33-crb-oc8`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaacewid and oqmd-30796, space group 63
- Stoichiometry: Nd 0.5000, Ni 0.5000
- Stability: stable in 4 of 4 calculated diagram(s): 300–1096.8 K, x(Ni) 0.5–0.5
- Literature: 25 values (25 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:ndni-b33)

Names (9): _corpus: _corpus:phase:nd-ni:ndni-b33  
_mp: _mp:mp-aaacewid  
_oqmd: _oqmd:oqmd-30796  
_paper: _paper:10.1007/s10853-022-08039-1:NdNi, paper:10.1016/j.jallcom.2005.02.037:NdNi  
_tdb: _tdb:NdNi-05Hua.tdb:NDNI_B33, tdb:NdNi-15Luo.tdb:NDNI_B33, tdb:NdNi-23Ye.tdb:NDNI_B33, tdb:NdNi-96Du.tdb:NDNI_B33  


### TDB models of NDNI_B33 (4): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): NDNI_B33, type code %, sha256 `75472194c597523e…`

~~~~text
55: PHASE NDNI_B33 % 2 1 1 !
56: CONST NDNI_B33 : ND : NI : !
~~~~

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): NDNI_B33, type code %, sha256 `3f57a2103568896d…`

~~~~text
63: PHASE NDNI_B33 % 2 1 1 !
64: CONST NDNI_B33 : ND : NI : !
~~~~

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): NDNI_B33, type code %, sha256 `14b046601bb540bc…`

~~~~text
57: PHASE NDNI_B33 % 2 1 1 !
58: CONST NDNI_B33 : ND : NI : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): NDNI_B33, type code %, sha256 `40296ac12169d5af…`

~~~~text
64: PHASE NDNI_B33 % 2 1 1 !
65: CONST NDNI_B33 : ND : NI : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_assessment that models this phase_

## NDNI2_C15 (Nd–Ni)

- Id: `phase:nd-ni:ndni2-c15`; status `assigned`
- Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type `st:c15-cu2mg-cf24`; tier A: standard phase name; confidence high
- Stoichiometry: Nd 0.3333, Ni 0.6667
- Stability: stable in 4 of 4 calculated diagram(s): 300–1236.86 K, x(Ni) 0.66667–0.66667
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:ndni2-c15)

Names (6): _corpus: _corpus:phase:nd-ni:ndni2-c15  
_paper: _paper:10.1016/j.jallcom.2005.02.037:NdNi2  
_tdb: _tdb:NdNi-05Hua.tdb:NDNI2_C15, tdb:NdNi-15Luo.tdb:NDNI2_C15, tdb:NdNi-23Ye.tdb:NDNI2_C15, tdb:NdNi-96Du.tdb:NDNI2_C15  


### TDB models of NDNI2_C15 (4): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): NDNI2_C15, type code %, sha256 `75472194c597523e…`

~~~~text
60: PHASE NDNI2_C15 % 2 1 2 !
61: CONST NDNI2_C15 : ND : NI : !
~~~~

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): NDNI2_C15, type code %, sha256 `3f57a2103568896d…`

~~~~text
68: PHASE NDNI2_C15 % 2 1 2 !
69: CONST NDNI2_C15 : ND : NI : !
~~~~

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): NDNI2_C15, type code %, sha256 `14b046601bb540bc…`

~~~~text
62: PHASE NDNI2_C15 % 2 1 2 !
63: CONST NDNI2_C15 : ND : NI : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): NDNI2_C15, type code %, sha256 `40296ac12169d5af…`

~~~~text
69: PHASE NDNI2_C15 % 2 1 2 !
70: CONST NDNI2_C15 : ND : NI : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_assessment that models this phase_

## NDNI3 (Nd–Ni)

- Id: `phase:nd-ni:ndni3`; 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 (no_on_hull_entry_in_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Nd 0.2500, Ni 0.7500
- Stability: stable in 4 of 4 calculated diagram(s): 300–1341.3 K, x(Ni) 0.75–0.75
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:ndni3)

Names (6): _corpus: _corpus:phase:nd-ni:ndni3  
_paper: _paper:10.1016/j.jallcom.2005.02.037:NdNi3  
_tdb: _tdb:NdNi-05Hua.tdb:NDNI3, tdb:NdNi-15Luo.tdb:NDNI3, tdb:NdNi-23Ye.tdb:NDNI3, tdb:NdNi-96Du.tdb:NDNI3  


### TDB models of NDNI3 (4): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): NDNI3, type code %, sha256 `75472194c597523e…`

~~~~text
65: PHASE NDNI3 % 2 1 3 !
66: CONST NDNI3 : ND : NI : !
~~~~

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): NDNI3, type code %, sha256 `3f57a2103568896d…`

~~~~text
73: PHASE NDNI3 % 2 1 3 !
74: CONST NDNI3 : ND : NI : !
~~~~

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): NDNI3, type code %, sha256 `14b046601bb540bc…`

~~~~text
67: PHASE NDNI3 % 2 1 3 !
68: CONST NDNI3 : ND : NI : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): NDNI3, type code %, sha256 `40296ac12169d5af…`

~~~~text
74: PHASE NDNI3 % 2 1 3 !
75: CONST NDNI3 : ND : NI : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_assessment that models this phase_

## NDNI5_D2D (Nd–Ni)

- Id: `phase:nd-ni:ndni5-d2d`; status `assigned`
- Structure: CaCu5 · D2_d · hP6 · P6/mmm (191); type `st:d2-d-cacu5-hp6`; tier A: standard phase name; confidence high
- Stoichiometry: Nd 0.1667, Ni 0.8333
- Stability: stable in 4 of 4 calculated diagram(s): 300–1689.66 K, x(Ni) 0.83333–0.83333
- Literature: 12 values (12 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:nd-ni:ndni5-d2d)

Names (6): _corpus: _corpus:phase:nd-ni:ndni5-d2d  
_paper: _paper:10.1016/j.jallcom.2005.02.037:NdNi5  
_tdb: _tdb:NdNi-05Hua.tdb:NDNI5_D2D, tdb:NdNi-15Luo.tdb:NDNI5_D2D, tdb:NdNi-23Ye.tdb:NDNI5_D2D, tdb:NdNi-96Du.tdb:NDNI5_D2D  


### TDB models of NDNI5_D2D (4): PHASE and CONSTITUENT statements as written

[NdNi-05Hua.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-05Hua.tdb): NDNI5_D2D, type code %, sha256 `75472194c597523e…`

~~~~text
80: PHASE NDNI5_D2D % 2 1 5 !
81: CONST NDNI5_D2D : ND : NI : !
~~~~

[NdNi-15Luo.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-15Luo.tdb): NDNI5_D2D, type code %, sha256 `3f57a2103568896d…`

~~~~text
83: PHASE NDNI5_D2D % 2 1 5 !
84: CONST NDNI5_D2D : ND : NI : !
~~~~

[NdNi-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-23Ye.tdb): NDNI5_D2D, type code %, sha256 `14b046601bb540bc…`

~~~~text
77: PHASE NDNI5_D2D % 2 1 5 !
78: CONST NDNI5_D2D : ND : NI : !
~~~~

[NdNi-96Du.tdb](https://orchid-project.org/data/databases/sgte-binary/NdNi-96Du.tdb): NDNI5_D2D, type code %, sha256 `40296ac12169d5af…`

~~~~text
84: PHASE NDNI5_D2D % 2 1 5 !
85: CONST NDNI5_D2D : ND : NI : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.jallcom.2005.02.037](https://doi.org/10.1016/j.jallcom.2005.02.037) Mianliang Huang, R. William McCallum, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Nd–Ni system, Journal of Alloys and Compounds 398, 127-132 (2005).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s10853-022-08039-1](https://doi.org/10.1007/s10853-022-08039-1) Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2015.10.009](https://doi.org/10.1016/j.calphad.2015.10.009) Parameters for the Ni-rich intermetallic phases slightly modified from 05Hua.  
_assessment that models this phase_
- [doi:10.1016/S0364-5916(96)00031-4](https://doi.org/10.1016/S0364-5916%2896%2900031-4) Y. Du, N. Clavaguera, Calphad, 20, 289-96(1996).  
_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). 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).