# Sn–Tb phases

> Sn–Tb system: 13 phases (tier A 7, tier C 4, liquid 1, needs_review 1); 11 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references.

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

13 phases (tier A 7, tier C 4, liquid 1, needs_review 1); 11 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: [interactive registry](https://orchid-project.org/phases/?q=SN-TB) · [full JSON](https://data.orchid-project.org/phases/systems/SN-TB.json) · [Sn–Tb system page](https://data.orchid-project.org/systems/SN-TB.html) · [Markdown](https://data.orchid-project.org/phases/pages/SN-TB.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Sn–Tb system (13)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [DIAMOND_A4](#phase-sn-tb-a4-diamond); _phase:sn-tb:a4-diamond_ | C (diamond) · A4 · cF8 · Fd-3m (227) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 |
| [BCT_A5](#phase-sn-tb-a5-bct); _phase:sn-tb:a5-bct_ | beta-Sn · A5 · tI4 · I4_1/amd (141) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–504.97 K, x(Tb) 0–0 | 0 | 1 |
| [BCC_A2](#phase-sn-tb-bcc-a2); _phase:sn-tb:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1397–2499.52 K, x(Tb) 1–1 | 0 | 1 |
| [FCC_A1](#phase-sn-tb-fcc-a1); _phase:sn-tb:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 |
| [HCP_A3](#phase-sn-tb-hcp-a3); _phase:sn-tb:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1562.01 K, x(Tb) 1–1 | 0 | 1 |
| [LIQUID](#phase-sn-tb-liquid); _phase:sn-tb:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 504.97–2500 K, x(Tb) 0–1 | 0 | 1 |
| [SN10TB11](#phase-sn-tb-sn10tb11); _phase:sn-tb:sn10tb11_ | Ge10Ho11 · tI84 · I4/mmm (139) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1864 K, x(Tb) 0.52381–0.52381 | 0 | 1 |
| [SN2TB_C49](#phase-sn-tb-sn2tb-c49); _phase:sn-tb:sn2tb-c49_ | ZrSi2 · C49 · oC12 · Cmcm (63) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1422.85 K, x(Tb) 0.33333–0.33333 | 0 | 1 |
| [SN3TB](#phase-sn-tb-sn3tb); _phase:sn-tb:sn3tb_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–723.22 K, x(Tb) 0.25–0.25 | 0 | 1 |
| [SN3TB5_D88](#phase-sn-tb-sn3tb5-d88); _phase:sn-tb:sn3tb5-d88_ | Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2122.63 K, x(Tb) 0.625–0.625 | 0 | 1 |
| [SN4TB5](#phase-sn-tb-sn4tb5); _phase:sn-tb:sn4tb5_ | Ge4Sm5 · oP36 · Pnma (62) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1982.63 K, x(Tb) 0.55556–0.55556 | 0 | 1 |
| [SN7TB3_HT](#phase-sn-tb-sn7tb3-ht); _phase:sn-tb:sn7tb3-ht_ | Sn7Tb3-ht · oP24 · Pmmm (47) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 1017.7–1105.46 K, x(Tb) 0.3–0.3 | 0 | 1 |
| [SN7TB3_LT](#phase-sn-tb-sn7tb3-lt); _phase:sn-tb:sn7tb3-lt_ | Sn7Tb3-lt · oC28 · Cmmm (65) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1017.7 K, x(Tb) 0.3–0.3 | 0 | 1 |

## DIAMOND_A4 (Sn–Tb)

- Id: `phase:sn-tb:a4-diamond`; status `assigned`
- Structure: C (diamond) · A4 · cF8 · Fd-3m (227); type `st:a4-c-diamond-cf8`; tier A: standard phase name; confidence high
- Stoichiometry: Sn 1.0000
- Stability: not stable in 1 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:a4-diamond)

Names (2): _corpus: _corpus:phase:sn-tb:a4-diamond  
_tdb: _tdb:SnTb-18Wan.tdb:DIAMOND_A4  


### TDB models of DIAMOND_A4 (1): PHASE and CONSTITUENT statements as written

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): DIAMOND_A4, type code %, sha256 `97fa50ca7f6feb71…`

~~~~text
43: PHASE DIAMOND_A4 % 1 1 !
44: CONST DIAMOND_A4 : SN : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_assessment that models this phase_

## BCT_A5 (Sn–Tb)

- Id: `phase:sn-tb:a5-bct`; status `assigned`
- Structure: beta-Sn · A5 · tI4 · I4_1/amd (141); type `st:a5-beta-sn-ti4`; tier A: standard phase name; confidence high
- Stoichiometry: Sn 1.0000
- Stability: stable in 1 of 1 calculated diagram(s): 300–504.97 K, x(Tb) 0–0
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:a5-bct)

Names (2): _corpus: _corpus:phase:sn-tb:a5-bct  
_tdb: _tdb:SnTb-18Wan.tdb:BCT_A5  


### TDB models of BCT_A5 (1): PHASE and CONSTITUENT statements as written

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): BCT_A5, type code %, sha256 `97fa50ca7f6feb71…`

~~~~text
48: PHASE BCT_A5 % 1 1 !
49: CONST BCT_A5 : SN : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_assessment that models this phase_

## BCC_A2 (Sn–Tb)

- Id: `phase:sn-tb: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 1 of 1 calculated diagram(s): 1397–2499.52 K, x(Tb) 1–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:bcc-a2)

Names (2): _corpus: _corpus:phase:sn-tb:bcc-a2  
_tdb: _tdb:SnTb-18Wan.tdb:BCC_A2  


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

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): BCC_A2, type code %B, sha256 `97fa50ca7f6feb71…`

~~~~text
33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : SN TB% : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_assessment that models this phase_

## FCC_A1 (Sn–Tb)

- Id: `phase:sn-tb:fcc-a1`; status `assigned`
- Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high
- Stoichiometry: Sn 1.0000
- Stability: not stable in 1 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:fcc-a1)

Names (2): _corpus: _corpus:phase:sn-tb:fcc-a1  
_tdb: _tdb:SnTb-18Wan.tdb:FCC_A1  


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

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): FCC_A1, type code %A, sha256 `97fa50ca7f6feb71…`

~~~~text
28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : SN : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_assessment that models this phase_

## HCP_A3 (Sn–Tb)

- Id: `phase:sn-tb:hcp-a3`; status `assigned`
- Structure: Mg · A3 · hP2 · P6_3/mmc (194); type `st:a3-mg-hp2`; tier A: standard phase name; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 300–1562.01 K, x(Tb) 1–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:hcp-a3)

Names (2): _corpus: _corpus:phase:sn-tb:hcp-a3  
_tdb: _tdb:SnTb-18Wan.tdb:HCP_A3  


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

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): HCP_A3, type code %A, sha256 `97fa50ca7f6feb71…`

~~~~text
38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : SN TB% : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_assessment that models this phase_

## LIQUID (Sn–Tb)

- Id: `phase:sn-tb:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 504.97–2500 K, x(Tb) 0–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:liquid)

Names (2): _corpus: _corpus:phase:sn-tb:liquid  
_tdb: _tdb:SnTb-18Wan.tdb:LIQUID  


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

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): LIQUID, type code %, sha256 `97fa50ca7f6feb71…`

~~~~text
23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : SN TB : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_assessment that models this phase_

## SN10TB11 (Sn–Tb)

- Id: `phase:sn-tb:sn10tb11`; status `assigned`
- Structure: Ge10Ho11 · tI84 · I4/mmm (139); type `st:ge10ho11-ti84`; 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: Sn 0.4762, Tb 0.5238
- Stability: stable in 1 of 1 calculated diagram(s): 300–1864 K, x(Tb) 0.52381–0.52381
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:sn10tb11)

Names (2): _corpus: _corpus:phase:sn-tb:sn10tb11  
_tdb: _tdb:SnTb-18Wan.tdb:SN10TB11  


### TDB models of SN10TB11 (1): PHASE and CONSTITUENT statements as written

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): SN10TB11, type code %, sha256 `97fa50ca7f6feb71…`

~~~~text
73: PHASE SN10TB11 % 2 10 11 !
74: CONST SN10TB11 : SN : TB : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_assessment that models this phase_

## SN2TB_C49 (Sn–Tb)

- Id: `phase:sn-tb:sn2tb-c49`; status `assigned`
- Structure: ZrSi2 · C49 · oC12 · Cmcm (63); type `st:c49-zrsi2-oc12`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaacjbeg and oqmd-21413, space group 63
- Stoichiometry: Sn 0.6667, Tb 0.3333
- Stability: stable in 1 of 1 calculated diagram(s): 300–1422.85 K, x(Tb) 0.33333–0.33333
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:sn2tb-c49)

Names (4): _corpus: _corpus:phase:sn-tb:sn2tb-c49  
_mp: _mp:mp-aaacjbeg  
_oqmd: _oqmd:oqmd-21413  
_tdb: _tdb:SnTb-18Wan.tdb:SN2TB_C49  


### TDB models of SN2TB_C49 (1): PHASE and CONSTITUENT statements as written

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): SN2TB_C49, type code %, sha256 `97fa50ca7f6feb71…`

~~~~text
68: PHASE SN2TB_C49 % 2 2 1 !
69: CONST SN2TB_C49 : SN : TB : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_assessment that models this phase_

## SN3TB (Sn–Tb)

- Id: `phase:sn-tb:sn3tb`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_rows_disagree
- Candidate (sgte_mmc2): GdSn2.75 · oC16 · Amm2 (38) — Hallstedt 2025 mmc2 row for SN3TB: Sn3Tb (see also AuCu3)
- Candidate (sgte_mmc2): AuCu3 · L1_2 · cP4 · Pm-3m (221) — Hallstedt 2025 mmc2 row for SN3TB: Sn3Tb (see also GdSn2.75)
- Candidate (tdb_comment): AuCu3 · cP4 · Pm-3m — SnTb-18Wan.tdb: 'Prototype AuCu3 (cP4, Pm-3m) and GdSn2.75 (oC16, Amm2)'
- Stoichiometry: Sn 0.7500, Tb 0.2500
- Stability: stable in 1 of 1 calculated diagram(s): 300–723.22 K, x(Tb) 0.25–0.25
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:sn3tb)

Names (2): _corpus: _corpus:phase:sn-tb:sn3tb  
_tdb: _tdb:SnTb-18Wan.tdb:SN3TB  


### TDB models of SN3TB (1): PHASE and CONSTITUENT statements as written

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): SN3TB, type code %, sha256 `97fa50ca7f6feb71…`

~~~~text
53: PHASE SN3TB % 2 3 1 !
54: CONST SN3TB : SN : TB : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_assessment that models this phase_

## SN3TB5_D88 (Sn–Tb)

- Id: `phase:sn-tb:sn3tb5-d88`; status `assigned`
- Structure: Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193); type `st:d8-8-mn5si3-hp16`; tier A: standard phase name; confidence high
- Stoichiometry: Sn 0.3750, Tb 0.6250
- Stability: stable in 1 of 1 calculated diagram(s): 300–2122.63 K, x(Tb) 0.625–0.625
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:sn3tb5-d88)

Names (2): _corpus: _corpus:phase:sn-tb:sn3tb5-d88  
_tdb: _tdb:SnTb-18Wan.tdb:SN3TB5_D88  


### TDB models of SN3TB5_D88 (1): PHASE and CONSTITUENT statements as written

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): SN3TB5_D88, type code %, sha256 `97fa50ca7f6feb71…`

~~~~text
83: PHASE SN3TB5_D88 % 2 3 5 !
84: CONST SN3TB5_D88 : SN : TB : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_assessment that models this phase_

## SN4TB5 (Sn–Tb)

- Id: `phase:sn-tb:sn4tb5`; status `assigned`
- Structure: Ge4Sm5 · oP36 · Pnma (62); type `st:ge4sm5-op36`; 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_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Sn 0.4444, Tb 0.5556
- Stability: stable in 1 of 1 calculated diagram(s): 300–1982.63 K, x(Tb) 0.55556–0.55556
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:sn4tb5)

Names (2): _corpus: _corpus:phase:sn-tb:sn4tb5  
_tdb: _tdb:SnTb-18Wan.tdb:SN4TB5  


### TDB models of SN4TB5 (1): PHASE and CONSTITUENT statements as written

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): SN4TB5, type code %, sha256 `97fa50ca7f6feb71…`

~~~~text
78: PHASE SN4TB5 % 2 4 5 !
79: CONST SN4TB5 : SN : TB : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_assessment that models this phase_

## SN7TB3_HT (Sn–Tb)

- Id: `phase:sn-tb:sn7tb3-ht`; status `assigned`
- Structure: Sn7Tb3-ht · oP24 · Pmmm (47); type `st:sn7tb3-ht-op24`; 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: Sn 0.7000, Tb 0.3000
- Stability: stable in 1 of 1 calculated diagram(s): 1017.7–1105.46 K, x(Tb) 0.3–0.3
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:sn7tb3-ht)

Names (2): _corpus: _corpus:phase:sn-tb:sn7tb3-ht  
_tdb: _tdb:SnTb-18Wan.tdb:SN7TB3_HT  


### TDB models of SN7TB3_HT (1): PHASE and CONSTITUENT statements as written

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): SN7TB3_HT, type code %, sha256 `97fa50ca7f6feb71…`

~~~~text
63: PHASE SN7TB3_HT % 2 7 3 !
64: CONST SN7TB3_HT : SN : TB : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_assessment that models this phase_

## SN7TB3_LT (Sn–Tb)

- Id: `phase:sn-tb:sn7tb3-lt`; status `assigned`
- Structure: Sn7Tb3-lt · oC28 · Cmmm (65); type `st:sn7tb3-lt-oc28`; 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: Sn 0.7000, Tb 0.3000
- Stability: stable in 1 of 1 calculated diagram(s): 300–1017.7 K, x(Tb) 0.3–0.3
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-tb:sn7tb3-lt)

Names (2): _corpus: _corpus:phase:sn-tb:sn7tb3-lt  
_tdb: _tdb:SnTb-18Wan.tdb:SN7TB3_LT  


### TDB models of SN7TB3_LT (1): PHASE and CONSTITUENT statements as written

[SnTb-18Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/SnTb-18Wan.tdb): SN7TB3_LT, type code %, sha256 `97fa50ca7f6feb71…`

~~~~text
58: PHASE SN7TB3_LT % 2 7 3 !
59: CONST SN7TB3_LT : SN : TB : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.12.009](https://doi.org/10.1016/j.calphad.2017.12.009) S.L. Wang, X.H. Su, S.S. Li, C.Y. Fu, Y.H. Guo, Y.X. Huang, D.X. Xiang, C.P. Wang, X.J. Liu, Calphad, 60, 214-21(2018).  
_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).