# Sm–Zn phases

> Sm–Zn system: 13 phases (tier A 5, tier B 1, tier C 4, liquid 1, needs_review 2); 12 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/SM-ZN.html · Markdown: https://data.orchid-project.org/phases/pages/SM-ZN.md

13 phases (tier A 5, tier B 1, tier C 4, liquid 1, needs_review 2); 12 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=SM-ZN) · [full JSON](https://data.orchid-project.org/phases/systems/SM-ZN.json) · [Sm–Zn system page](https://data.orchid-project.org/systems/SM-ZN.html) · [Markdown](https://data.orchid-project.org/phases/pages/SM-ZN.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Sm–Zn system (13)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [BCC_A2](#phase-sm-zn-bcc-a2); _phase:sm-zn:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 935.81–1351.21 K, x(Zn) 0–0.09329 | 8 | 2 |
| [FCC_A1](#phase-sm-zn-fcc-a1); _phase:sm-zn:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | not stable in 2 calculated diagram(s) | 0 | 2 |
| [HCP_A3](#phase-sm-zn-hcp-a3); _phase:sm-zn:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2498.93 K, x(Zn) 0–1 | 7 | 2 |
| [LIQUID](#phase-sm-zn-liquid); _phase:sm-zn:liquid_ | liquid | liquid | stable in 2 of 2 calculated diagram(s): 692.67–2500 K, x(Zn) 0–1 | 46 | 2 |
| [RHOMB_C19](#phase-sm-zn-rhomb-c19); _phase:sm-zn:rhomb-c19_ | CdCl2 · C19 · hR3 · R-3m (166) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1191.87 K, x(Zn) 0–0.00017 | 1 | 2 |
| [SM13ZN58](#phase-sm-zn-sm13zn58); _phase:sm-zn:sm13zn58_ | Gd13Zn58 · hP142 · P6_3/mmc (194) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1183.89 K, x(Zn) 0.8169–0.8169 | 22 | 2 |
| [SM2ZN17](#phase-sm-zn-sm2zn17); _phase:sm-zn:sm2zn17_ |  | needs_review | stable in 2 of 2 calculated diagram(s): 300–1220.47 K, x(Zn) 0.89474–0.89474 | 22 | 2 |
| [SM3ZN11](#phase-sm-zn-sm3zn11); _phase:sm-zn:sm3zn11_ | Al11La3 · oI28 · Immm (71) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1142.58 K, x(Zn) 0.78571–0.78571 | 14 | 2 |
| [SM3ZN22](#phase-sm-zn-sm3zn22); _phase:sm-zn:sm3zn22_ | Ce3Zn22 · tI100 · I4_1/amd (141) | tier B: DFT-supported (unique MP + OQMD match) | stable in 2 of 2 calculated diagram(s): 300–1162.12 K, x(Zn) 0.88–0.88 | 10 | 2 |
| [SMZN_B2](#phase-sm-zn-smzn-b2); _phase:sm-zn:smzn-b2_ | CsCl · B2 · cP2 · Pm-3m (221) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1233.29 K, x(Zn) 0.5–0.5 | 17 | 2 |
| [SMZN11_D2B](#phase-sm-zn-smzn11-d2b); _phase:sm-zn:smzn11-d2b_ |  | needs_review | stable in 2 of 2 calculated diagram(s): 300–1106.9 K, x(Zn) 0.91667–0.91667 | 6 | 2 |
| [SMZN2](#phase-sm-zn-smzn2); _phase:sm-zn:smzn2_ | Hg2K · oI12 · Imma (74) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1224.85 K, x(Zn) 0.66667–0.66667 | 18 | 2 |
| [SMZN3](#phase-sm-zn-smzn3); _phase:sm-zn:smzn3_ | YZn3 · oP16 · Pnma (62) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1133.06 K, x(Zn) 0.75–0.75 | 14 | 2 |

## BCC_A2 (Sm–Zn)

- Id: `phase:sm-zn: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 2 of 2 calculated diagram(s): 935.81–1351.21 K, x(Zn) 0–0.09329
- Literature: 8 values (8 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:bcc-a2)

Names (5): _corpus: _corpus:phase:sm-zn:bcc-a2  
_paper: _paper:10.1016/j.jallcom.2008.01.003:bcc_A2, paper:10.1016/j.jallcom.2008.06.019:Bcc  
_tdb: _tdb:SmZn-09Jia.tdb:BCC_A2, tdb:SmZn-09Liu.tdb:BCC_A2  


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

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): BCC_A2, type code %B, sha256 `86e42c0e5989ffc0…`

~~~~text
35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : SM ZN : VA% : !
~~~~

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): BCC_A2, type code %B, sha256 `7414e4f41bfa783a…`

~~~~text
32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : SM ZN : VA% : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (2009).  
_assessment that models this phase; reports values for this phase_

## FCC_A1 (Sm–Zn)

- Id: `phase:sm-zn:fcc-a1`; status `assigned`
- Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high
- Stoichiometry: Zn 1.0000
- Stability: not stable in 2 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:fcc-a1)

Names (3): _corpus: _corpus:phase:sm-zn:fcc-a1  
_tdb: _tdb:SmZn-09Jia.tdb:FCC_A1, tdb:SmZn-09Liu.tdb:FCC_A1  


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

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): FCC_A1, type code %A, sha256 `86e42c0e5989ffc0…`

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

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): FCC_A1, type code %A, sha256 `7414e4f41bfa783a…`

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

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (2009).  
_assessment that models this phase_

## HCP_A3 (Sm–Zn)

- Id: `phase:sm-zn: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 2 of 2 calculated diagram(s): 300–2498.93 K, x(Zn) 0–1
- Literature: 7 values (7 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:hcp-a3)

Names (7): _corpus: _corpus:phase:sm-zn:hcp-a3  
_paper: _paper:10.1016/j.jallcom.2008.01.003:hcp, paper:10.1016/j.jallcom.2008.06.019:Hcp, paper:10.1016/j.jallcom.2008.06.019:Hcp(Sm), paper:10.1016/j.jallcom.2008.06.019:Hcp(Zn)  
_tdb: _tdb:SmZn-09Jia.tdb:HCP_A3, tdb:SmZn-09Liu.tdb:HCP_A3  


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

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): HCP_A3, type code %A, sha256 `86e42c0e5989ffc0…`

~~~~text
40: PHASE HCP_A3 %A 2 1 0.5 !
41: CONST HCP_A3 : SM ZN : VA% : !
~~~~

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): HCP_A3, type code %A, sha256 `7414e4f41bfa783a…`

~~~~text
37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : SM ZN : VA% : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase; reports values for this phase_

## LIQUID (Sm–Zn)

- Id: `phase:sm-zn:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 692.67–2500 K, x(Zn) 0–1
- Literature: 46 values (46 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:liquid)

Names (5): _corpus: _corpus:phase:sm-zn:liquid  
_paper: _paper:10.1016/j.jallcom.2008.01.003:L, paper:10.1016/j.jallcom.2008.06.019:L  
_tdb: _tdb:SmZn-09Jia.tdb:LIQUID, tdb:SmZn-09Liu.tdb:LIQUID  


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

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): LIQUID, type code %, sha256 `86e42c0e5989ffc0…`

~~~~text
25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : SM ZN : !
~~~~

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): LIQUID, type code %, sha256 `7414e4f41bfa783a…`

~~~~text
22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : SM ZN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase; reports values for this phase_

## RHOMB_C19 (Sm–Zn)

- Id: `phase:sm-zn:rhomb-c19`; status `assigned`
- Structure: CdCl2 · C19 · hR3 · R-3m (166); type `st:c19-cdcl2-hr3`; tier A: standard phase name; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 300–1191.87 K, x(Zn) 0–0.00017
- Literature: 1 values (1 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:rhomb-c19)

Names (4): _corpus: _corpus:phase:sm-zn:rhomb-c19  
_paper: _paper:10.1016/j.jallcom.2008.06.019:Rhom  
_tdb: _tdb:SmZn-09Jia.tdb:RHOMB_C19, tdb:SmZn-09Liu.tdb:RHOMB_C19  


### TDB models of RHOMB_C19 (2): PHASE and CONSTITUENT statements as written

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): RHOMB_C19, type code %, sha256 `86e42c0e5989ffc0…`

~~~~text
45: PHASE RHOMB_C19 % 1 1 !
46: CONST RHOMB_C19 : SM : !
~~~~

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): RHOMB_C19, type code %, sha256 `7414e4f41bfa783a…`

~~~~text
42: PHASE RHOMB_C19 % 1 1 !
43: CONST RHOMB_C19 : SM% ZN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase_

## SM13ZN58 (Sm–Zn)

- Id: `phase:sm-zn:sm13zn58`; status `assigned`
- Structure: Gd13Zn58 · hP142 · P6_3/mmc (194); type `st:gd13zn58-hp142`; 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: Sm 0.1831, Zn 0.8169
- Stability: stable in 2 of 2 calculated diagram(s): 300–1183.89 K, x(Zn) 0.8169–0.8169
- Literature: 22 values (22 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:sm13zn58)

Names (5): _corpus: _corpus:phase:sm-zn:sm13zn58  
_paper: _paper:10.1016/j.jallcom.2008.01.003:Sm13Zn58, paper:10.1016/j.jallcom.2008.06.019:Sm13Zn58  
_tdb: _tdb:SmZn-09Jia.tdb:SM13ZN58, tdb:SmZn-09Liu.tdb:SM13ZN58  


### TDB models of SM13ZN58 (2): PHASE and CONSTITUENT statements as written

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): SM13ZN58, type code %, sha256 `86e42c0e5989ffc0…`

~~~~text
70: PHASE SM13ZN58 % 2 13 58 !
71: CONST SM13ZN58 : SM : ZN : !
~~~~

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): SM13ZN58, type code %, sha256 `7414e4f41bfa783a…`

~~~~text
67: PHASE SM13ZN58 % 2 13 58 !
68: CONST SM13ZN58 : SM : ZN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (2009).  
_assessment that models this phase; reports values for this phase_

## SM2ZN17 (Sm–Zn)

- Id: `phase:sm-zn:sm2zn17`; status `needs_review`
- No structure assigned. Why: no_structure_token; sgte_mmc2_row_disagrees_with_dft; sgte_mmc2_rows_disagree
- Candidate (dft_mp): R-3m (166) — on-hull MP Sm2Zn17 at x(ZN)=0.8947
- Candidate (dft_oqmd): R-3m (166) — on-hull OQMD Sm2 Zn17 at x(ZN)=0.8947
- Candidate (literature_printed): Ni17Th2 · hP38 — printed with a label mapped to this phase
- Candidate (sgte_mmc2): Ni17Th2 · hP38 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for SM2ZN17: Sm2Zn17 (RT), see also Th2Zn17
- Candidate (sgte_mmc2): Th2Zn17 · hR19 · R-3m (166) — Hallstedt 2025 mmc2 row for SM2ZN17: Sm2Zn17 (HT), see also Ni17Th2
- Candidate (tdb_comment): Ni17Th2 · hP38 · P6_3/mmc — SmZn-09Jia.tdb: 'Prototype Ni17Th2 (hP38, P6_3/mmc), RT'
- Candidate (tdb_comment): Th2Zn17 · hR19 · R-3m — SmZn-09Jia.tdb: 'Prototype Th2Zn17 (hR19, R-3m), HT'
- Candidate (tdb_comment): Ni17Th2 · hP38 · P6_3/mmc — SmZn-09Liu.tdb: 'Prototype Ni17Th2 (hP38, P6_3/mmc), RT'
- Stoichiometry: Sm 0.1053, Zn 0.8947
- Stability: stable in 2 of 2 calculated diagram(s): 300–1220.47 K, x(Zn) 0.89474–0.89474
- Literature: 22 values (22 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:sm2zn17)

Names (5): _corpus: _corpus:phase:sm-zn:sm2zn17  
_paper: _paper:10.1016/j.jallcom.2008.01.003:Sm2Zn17, paper:10.1016/j.jallcom.2008.06.019:Sm2Zn17  
_tdb: _tdb:SmZn-09Jia.tdb:SM2ZN17, tdb:SmZn-09Liu.tdb:SM2ZN17  


### TDB models of SM2ZN17 (2): PHASE and CONSTITUENT statements as written

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): SM2ZN17, type code %, sha256 `86e42c0e5989ffc0…`

~~~~text
81: PHASE SM2ZN17 % 2 2 17 !
82: CONST SM2ZN17 : SM : ZN : !
~~~~

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): SM2ZN17, type code %, sha256 `7414e4f41bfa783a…`

~~~~text
78: PHASE SM2ZN17 % 2 2 17 !
79: CONST SM2ZN17 : SM : ZN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (2009).  
_assessment that models this phase; reports values for this phase_

## SM3ZN11 (Sm–Zn)

- Id: `phase:sm-zn:sm3zn11`; status `assigned`
- Structure: Al11La3 · oI28 · Immm (71); type `st:al11la3-oi28`; 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_71_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Sm 0.2143, Zn 0.7857
- Stability: stable in 2 of 2 calculated diagram(s): 300–1142.58 K, x(Zn) 0.78571–0.78571
- Literature: 14 values (14 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:sm3zn11)

Names (5): _corpus: _corpus:phase:sm-zn:sm3zn11  
_paper: _paper:10.1016/j.jallcom.2008.01.003:Sm3Zn11, paper:10.1016/j.jallcom.2008.06.019:Sm3Zn11  
_tdb: _tdb:SmZn-09Jia.tdb:SM3ZN11, tdb:SmZn-09Liu.tdb:SM3ZN11  


### TDB models of SM3ZN11 (2): PHASE and CONSTITUENT statements as written

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): SM3ZN11, type code %, sha256 `86e42c0e5989ffc0…`

~~~~text
65: PHASE SM3ZN11 % 2 3 11 !
66: CONST SM3ZN11 : SM : ZN : !
~~~~

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): SM3ZN11, type code %, sha256 `7414e4f41bfa783a…`

~~~~text
62: PHASE SM3ZN11 % 2 3 11 !
63: CONST SM3ZN11 : SM : ZN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (2009).  
_assessment that models this phase; reports values for this phase_

## SM3ZN22 (Sm–Zn)

- Id: `phase:sm-zn:sm3zn22`; status `assigned`
- Structure: Ce3Zn22 · tI100 · I4_1/amd (141); type `st:ce3zn22-ti100`; tier B: DFT-supported (unique MP + OQMD match); confidence high
- Stoichiometry: Sm 0.1200, Zn 0.8800
- Stability: stable in 2 of 2 calculated diagram(s): 300–1162.12 K, x(Zn) 0.88–0.88
- Literature: 10 values (10 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:sm3zn22)

Names (7): _corpus: _corpus:phase:sm-zn:sm3zn22  
_mp: _mp:mp-aaacqjhx  
_oqmd: _oqmd:oqmd-670850  
_paper: _paper:10.1016/j.jallcom.2008.01.003:Sm3Zn22, paper:10.1016/j.jallcom.2008.06.019:Sm3Zn22  
_tdb: _tdb:SmZn-09Jia.tdb:SM3ZN22, tdb:SmZn-09Liu.tdb:SM3ZN22  


### TDB models of SM3ZN22 (2): PHASE and CONSTITUENT statements as written

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): SM3ZN22, type code %, sha256 `86e42c0e5989ffc0…`

~~~~text
75: PHASE SM3ZN22 % 2 3 22 !
76: CONST SM3ZN22 : SM : ZN : !
~~~~

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): SM3ZN22, type code %, sha256 `7414e4f41bfa783a…`

~~~~text
72: PHASE SM3ZN22 % 2 3 22 !
73: CONST SM3ZN22 : SM : ZN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (2009).  
_assessment that models this phase; reports values for this phase_

## SMZN_B2 (Sm–Zn)

- Id: `phase:sm-zn:smzn-b2`; status `assigned`
- Structure: CsCl · B2 · cP2 · Pm-3m (221); type `st:b2-cscl-cp2`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaaaadfh and oqmd-18114, space group 221
- Stoichiometry: Sm 0.5000, Zn 0.5000
- Stability: stable in 2 of 2 calculated diagram(s): 300–1233.29 K, x(Zn) 0.5–0.5
- Literature: 17 values (17 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:smzn-b2)

Names (7): _corpus: _corpus:phase:sm-zn:smzn-b2  
_mp: _mp:mp-aaaaadfh  
_oqmd: _oqmd:oqmd-18114  
_paper: _paper:10.1016/j.jallcom.2008.01.003:SmZn, paper:10.1016/j.jallcom.2008.06.019:SmZn  
_tdb: _tdb:SmZn-09Jia.tdb:SMZN_B2, tdb:SmZn-09Liu.tdb:SMZN_B2  


### TDB models of SMZN_B2 (2): PHASE and CONSTITUENT statements as written

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): SMZN_B2, type code %, sha256 `86e42c0e5989ffc0…`

~~~~text
50: PHASE SMZN_B2 % 2 1 1 !
51: CONST SMZN_B2 : SM : ZN : !
~~~~

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): SMZN_B2, type code %, sha256 `7414e4f41bfa783a…`

~~~~text
47: PHASE SMZN_B2 % 2 1 1 !
48: CONST SMZN_B2 : SM : ZN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase; reports values for this phase_

## SMZN11_D2B (Sm–Zn)

- Id: `phase:sm-zn:smzn11-d2b`; status `needs_review`
- No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_D2_b; stoichiometry_contradicts_D2_b:SmZn-09Jia.tdb; stoichiometry_contradicts_D2_b:SmZn-09Liu.tdb
- Candidate (literature_printed): Mn12Th · tI26 — printed with a label mapped to this phase
- Candidate (name_token): Mn12Th · D2_b · tI26 · I4/mmm (139) — Strukturbericht/word 'D2B' in the TDB name
- Candidate (sgte_mmc2): Mn12Th · D2_b · tI26 · I4/mmm (139) — Hallstedt 2025 mmc2 row for SMZN11_D2B: SmZn11
- Candidate (tdb_comment): Mn12Th · tI26 · I4/mmm — SmZn-09Jia.tdb: 'Prototype Mn12Th (tI26, I4/mmm)'
- Candidate (tdb_comment): Mn12Th · tI26 · I4/mmm — SmZn-09Liu.tdb: 'Prototype Mn12Th (tI26, I4/mmm)'
- Stoichiometry: Sm 0.0833, Zn 0.9167
- Stability: stable in 2 of 2 calculated diagram(s): 300–1106.9 K, x(Zn) 0.91667–0.91667
- Literature: 6 values (6 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:smzn11-d2b)

Names (5): _corpus: _corpus:phase:sm-zn:smzn11-d2b  
_paper: _paper:10.1016/j.jallcom.2008.01.003:SmZn11, paper:10.1016/j.jallcom.2008.06.019:SmZn11  
_tdb: _tdb:SmZn-09Jia.tdb:SMZN11_D2B, tdb:SmZn-09Liu.tdb:SMZN11_D2B  


### TDB models of SMZN11_D2B (2): PHASE and CONSTITUENT statements as written

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): SMZN11_D2B, type code %, sha256 `86e42c0e5989ffc0…`

~~~~text
86: PHASE SMZN11_D2B % 2 1 11 !
87: CONST SMZN11_D2B : SM : ZN : !
~~~~

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): SMZN11_D2B, type code %, sha256 `7414e4f41bfa783a…`

~~~~text
83: PHASE SMZN11_D2B % 2 1 11 !
84: CONST SMZN11_D2B : SM : ZN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase; reports values for this phase_

## SMZN2 (Sm–Zn)

- Id: `phase:sm-zn:smzn2`; status `assigned`
- Structure: Hg2K · oI12 · Imma (74); type `st:hg2k-oi12`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (dft_space_group_74_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Sm 0.3333, Zn 0.6667
- Stability: stable in 2 of 2 calculated diagram(s): 300–1224.85 K, x(Zn) 0.66667–0.66667
- Literature: 18 values (18 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:smzn2)

Names (5): _corpus: _corpus:phase:sm-zn:smzn2  
_paper: _paper:10.1016/j.jallcom.2008.01.003:SmZn2, paper:10.1016/j.jallcom.2008.06.019:SmZn2  
_tdb: _tdb:SmZn-09Jia.tdb:SMZN2, tdb:SmZn-09Liu.tdb:SMZN2  


### TDB models of SMZN2 (2): PHASE and CONSTITUENT statements as written

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): SMZN2, type code %, sha256 `86e42c0e5989ffc0…`

~~~~text
55: PHASE SMZN2 % 2 1 2 !
56: CONST SMZN2 : SM : ZN : !
~~~~

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): SMZN2, type code %, sha256 `7414e4f41bfa783a…`

~~~~text
52: PHASE SMZN2 % 2 1 2 !
53: CONST SMZN2 : SM : ZN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (2009).  
_assessment that models this phase; reports values for this phase_

## SMZN3 (Sm–Zn)

- Id: `phase:sm-zn:smzn3`; status `assigned`
- Structure: YZn3 · oP16 · Pnma (62); type `st:yzn3-op16`; 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_62_matches_4_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Sm 0.2500, Zn 0.7500
- Stability: stable in 2 of 2 calculated diagram(s): 300–1133.06 K, x(Zn) 0.75–0.75
- Literature: 14 values (14 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sm-zn:smzn3)

Names (5): _corpus: _corpus:phase:sm-zn:smzn3  
_paper: _paper:10.1016/j.jallcom.2008.01.003:SmZn3, paper:10.1016/j.jallcom.2008.06.019:SmZn3  
_tdb: _tdb:SmZn-09Jia.tdb:SMZN3, tdb:SmZn-09Liu.tdb:SMZN3  


### TDB models of SMZN3 (2): PHASE and CONSTITUENT statements as written

[SmZn-09Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Jia.tdb): SMZN3, type code %, sha256 `86e42c0e5989ffc0…`

~~~~text
60: PHASE SMZN3 % 2 1 3 !
61: CONST SMZN3 : SM : ZN : !
~~~~

[SmZn-09Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/SmZn-09Liu.tdb): SMZN3, type code %, sha256 `7414e4f41bfa783a…`

~~~~text
57: PHASE SMZN3 % 2 1 3 !
58: CONST SMZN3 : SM : ZN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jallcom.2008.01.003](https://doi.org/10.1016/j.jallcom.2008.01.003) X.J. Liu, X. Chen, C.P. Wang, Thermodynamic assessments of the Sm–Zn and Nd–Zn systems, Journal of Alloys and Compounds 468, 115-121 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2008.06.019](https://doi.org/10.1016/j.jallcom.2008.06.019) B.R. Jia, L.G. Zhang, G.X. Huang, H.Y. Qi, H. Yang, L.B. Liu et al., Thermodynamic assessment of the Sm–Zn binary system, Journal of Alloys and Compounds 473, 176-179 (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).