# S–Ti phases

> S–Ti system: 13 phases (tier A 6, tier C 5, liquid 1, needs_review 1); 10 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/S-TI.html · Markdown: https://data.orchid-project.org/phases/pages/S-TI.md

13 phases (tier A 6, tier C 5, liquid 1, needs_review 1); 10 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=S-TI) · [full JSON](https://data.orchid-project.org/phases/systems/S-TI.json) · [Markdown](https://data.orchid-project.org/phases/pages/S-TI.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the S–Ti system (13)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [ORTHORHOMBIC_A16](#phase-s-ti-a16-orthorhombic); _phase:s-ti:a16-orthorhombic_ | alpha-S · A16 · oF128 · Fddd (70) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 |
| [BCC_A2](#phase-s-ti-bcc-a2); _phase:s-ti:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300.05–2499.73 K, x(S) 0–0 | 0 | 1 |
| [FCC_A1](#phase-s-ti-fcc-a1); _phase:s-ti: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-s-ti-hcp-a3); _phase:s-ti:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1155.05 K, x(S) 0–2e-05 | 0 | 1 |
| [LIQUID](#phase-s-ti-liquid); _phase:s-ti:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 300–2500 K, x(S) 0–1 | 0 | 1 |
| [MONOCLINIC_S](#phase-s-ti-s-monoclinic); _phase:s-ti:s-monoclinic_ |  | needs_review | not stable in 1 calculated diagram(s) | 0 | 1 |
| [TI2S](#phase-s-ti-ti2s); _phase:s-ti:ti2s_ | Ta2P · oP36 · Pnnm (58) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1690.79 K, x(S) 0.32506–0.3599 | 0 | 1 |
| [TI8S10](#phase-s-ti-ti8s10); _phase:s-ti:ti8s10_ | TiS-10H · hP20 · P6_3/mmc (194) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–2123.74 K, x(S) 0.55556–0.55556 | 0 | 1 |
| [TI8S3](#phase-s-ti-ti8s3); _phase:s-ti:ti8s3_ | Ti8S3 · mC88 · C2/m (12) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1579.37 K, x(S) 0.27273–0.27273 | 0 | 1 |
| [TI8S9](#phase-s-ti-ti8s9); _phase:s-ti:ti8s9_ | TiS-9R · hR6 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–2253.98 K, x(S) 0.52941–0.52941 | 0 | 1 |
| [TIS_B81](#phase-s-ti-tis-b81); _phase:s-ti:tis-b81_ | NiAs · B8_1 · hP4 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2037.16 K, x(S) 0.47981–0.5 | 0 | 1 |
| [TIS2_C6](#phase-s-ti-tis2-c6); _phase:s-ti:tis2-c6_ | CdI2 · C6 · hP3 · P-3m1 (164) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2023.18 K, x(S) 0.64481–0.66003 | 0 | 1 |
| [TIS3](#phase-s-ti-tis3); _phase:s-ti:tis3_ | ZrSe3 · mP8 · P2_1/m (11) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–838.84 K, x(S) 0.75–0.75 | 0 | 1 |

## ORTHORHOMBIC_A16 (S–Ti)

- Id: `phase:s-ti:a16-orthorhombic`; status `assigned`
- Structure: alpha-S · A16 · oF128 · Fddd (70); type `st:a16-alpha-s-of128`; tier A: standard phase name; confidence high
- Stoichiometry: S 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:s-ti:a16-orthorhombic)

Names (2): _corpus: _corpus:phase:s-ti:a16-orthorhombic  
_tdb: _tdb:TiS-17Hir.tdb:ORTHORHOMBIC_A16  


### TDB models of ORTHORHOMBIC_A16 (1): PHASE and CONSTITUENT statements as written

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): ORTHORHOMBIC_A16, type code %, sha256 `f4b8b71ea4278134…`

~~~~text
50: PHASE ORTHORHOMBIC_A16 % 1 1 !
51: CONST ORTHORHOMBIC_A16 : S : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_assessment that models this phase_

## BCC_A2 (S–Ti)

- Id: `phase:s-ti: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): 300.05–2499.73 K, x(S) 0–0
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:s-ti:bcc-a2)

Names (2): _corpus: _corpus:phase:s-ti:bcc-a2  
_tdb: _tdb:TiS-17Hir.tdb:BCC_A2  


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

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): BCC_A2, type code %B, sha256 `f4b8b71ea4278134…`

~~~~text
40: PHASE BCC_A2 %B 2 1 3 !
41: CONST BCC_A2 : S TI% : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_assessment that models this phase_

## FCC_A1 (S–Ti)

- Id: `phase:s-ti:fcc-a1`; status `assigned`
- Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high
- 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:s-ti:fcc-a1)

Names (2): _corpus: _corpus:phase:s-ti:fcc-a1  
_tdb: _tdb:TiS-17Hir.tdb:FCC_A1  


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

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): FCC_A1, type code %A, sha256 `f4b8b71ea4278134…`

~~~~text
35: PHASE FCC_A1 %A 2 1 1 !
36: CONST FCC_A1 : S TI : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_assessment that models this phase_

## HCP_A3 (S–Ti)

- Id: `phase:s-ti: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): 300–1155.05 K, x(S) 0–2e-05
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:s-ti:hcp-a3)

Names (2): _corpus: _corpus:phase:s-ti:hcp-a3  
_tdb: _tdb:TiS-17Hir.tdb:HCP_A3  


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

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): HCP_A3, type code %A, sha256 `f4b8b71ea4278134…`

~~~~text
45: PHASE HCP_A3 %A 2 1 0.5 !
46: CONST HCP_A3 : S TI% : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_assessment that models this phase_

## LIQUID (S–Ti)

- Id: `phase:s-ti:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 300–2500 K, x(S) 0–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:s-ti:liquid)

Names (2): _corpus: _corpus:phase:s-ti:liquid  
_tdb: _tdb:TiS-17Hir.tdb:LIQUID  


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

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): LIQUID, type code %, sha256 `f4b8b71ea4278134…`

~~~~text
30: PHASE LIQUID:L % 1 1 !
31: CONST LIQUID:L : S TI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_assessment that models this phase_

## MONOCLINIC_S (S–Ti)

- Id: `phase:s-ti:s-monoclinic`; status `needs_review`
- No structure assigned. Why: name_has_descriptive_tokens:MONOCLINIC; no_structure_token
- Candidate (sgte_mmc2): beta-S · mP48 · P2_1/c (14) — Hallstedt 2025 mmc2 row for MONOCLINIC_S: beta-S
- Candidate (tdb_comment): beta-S · mP48 · P2_1/a — TiS-17Hir.tdb: 'Prototype beta-S (mP48, P2_1/a)'
- Stoichiometry: S 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:s-ti:s-monoclinic)

Names (2): _corpus: _corpus:phase:s-ti:s-monoclinic  
_tdb: _tdb:TiS-17Hir.tdb:MONOCLINIC_S  


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

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): MONOCLINIC_S, type code %, sha256 `f4b8b71ea4278134…`

~~~~text
55: PHASE MONOCLINIC_S % 1 1 !
56: CONST MONOCLINIC_S : S : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_assessment that models this phase_

## TI2S (S–Ti)

- Id: `phase:s-ti:ti2s`; status `assigned`
- Structure: Ta2P · oP36 · Pnnm (58); type `st:ta2p-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 (no_structure_token, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
- Stability: stable in 1 of 1 calculated diagram(s): 300–1690.79 K, x(S) 0.32506–0.3599
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:s-ti:ti2s)

Names (2): _corpus: _corpus:phase:s-ti:ti2s  
_tdb: _tdb:TiS-17Hir.tdb:TI2S  


### TDB models of TI2S (1): PHASE and CONSTITUENT statements as written

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): TI2S, type code %, sha256 `f4b8b71ea4278134…`

~~~~text
65: PHASE TI2S % 2 2 1 !
66: CONST TI2S : TI% VA : S% VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_assessment that models this phase_

## TI8S10 (S–Ti)

- Id: `phase:s-ti:ti8s10`; status `assigned`
- Structure: TiS-10H · hP20 · P6_3/mmc (194); type `st:tis-10h-hp20`; 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: S 0.5556, Ti 0.4444
- Stability: stable in 1 of 1 calculated diagram(s): 300–2123.74 K, x(S) 0.55556–0.55556
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:s-ti:ti8s10)

Names (2): _corpus: _corpus:phase:s-ti:ti8s10  
_tdb: _tdb:TiS-17Hir.tdb:TI8S10  


### TDB models of TI8S10 (1): PHASE and CONSTITUENT statements as written

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): TI8S10, type code %, sha256 `f4b8b71ea4278134…`

~~~~text
80: PHASE TI8S10 % 2 8 10 !
81: CONST TI8S10 : TI : S : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_assessment that models this phase_

## TI8S3 (S–Ti)

- Id: `phase:s-ti:ti8s3`; status `assigned`
- Structure: Ti8S3 · mC88 · C2/m (12); type `st:ti8s3-mc88`; 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: S 0.2727, Ti 0.7273
- Stability: stable in 1 of 1 calculated diagram(s): 300–1579.37 K, x(S) 0.27273–0.27273
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:s-ti:ti8s3)

Names (2): _corpus: _corpus:phase:s-ti:ti8s3  
_tdb: _tdb:TiS-17Hir.tdb:TI8S3  


### TDB models of TI8S3 (1): PHASE and CONSTITUENT statements as written

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): TI8S3, type code %, sha256 `f4b8b71ea4278134…`

~~~~text
60: PHASE TI8S3 % 2 8 3 !
61: CONST TI8S3 : TI : S : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_assessment that models this phase_

## TI8S9 (S–Ti)

- Id: `phase:s-ti:ti8s9`; status `assigned`
- Structure: TiS-9R · hR6 · R-3m (166); type `st:tis-9r-hr6`; 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: S 0.5294, Ti 0.4706
- Stability: stable in 1 of 1 calculated diagram(s): 300–2253.98 K, x(S) 0.52941–0.52941
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:s-ti:ti8s9)

Names (2): _corpus: _corpus:phase:s-ti:ti8s9  
_tdb: _tdb:TiS-17Hir.tdb:TI8S9  


### TDB models of TI8S9 (1): PHASE and CONSTITUENT statements as written

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): TI8S9, type code %, sha256 `f4b8b71ea4278134…`

~~~~text
75: PHASE TI8S9 % 2 8 9 !
76: CONST TI8S9 : TI : S : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_assessment that models this phase_

## TIS_B81 (S–Ti)

- Id: `phase:s-ti:tis-b81`; status `assigned`
- Structure: NiAs · B8_1 · hP4 · P6_3/mmc (194); type `st:b8-1-nias-hp4`; tier A: standard phase name; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 300–2037.16 K, x(S) 0.47981–0.5
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:s-ti:tis-b81)

Names (2): _corpus: _corpus:phase:s-ti:tis-b81  
_tdb: _tdb:TiS-17Hir.tdb:TIS_B81  


### TDB models of TIS_B81 (1): PHASE and CONSTITUENT statements as written

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): TIS_B81, type code %, sha256 `f4b8b71ea4278134…`

~~~~text
70: PHASE TIS_B81 % 2 1 1 !
71: CONST TIS_B81 : TI% VA : S% VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_assessment that models this phase_

## TIS2_C6 (S–Ti)

- Id: `phase:s-ti:tis2-c6`; status `assigned`
- Structure: CdI2 · C6 · hP3 · P-3m1 (164); type `st:c6-cdi2-hp3`; tier A: standard phase name; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 300–2023.18 K, x(S) 0.64481–0.66003
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:s-ti:tis2-c6)

Names (2): _corpus: _corpus:phase:s-ti:tis2-c6  
_tdb: _tdb:TiS-17Hir.tdb:TIS2_C6  


### TDB models of TIS2_C6 (1): PHASE and CONSTITUENT statements as written

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): TIS2_C6, type code %, sha256 `f4b8b71ea4278134…`

~~~~text
85: PHASE TIS2_C6 % 2 1 2 !
86: CONST TIS2_C6 : TI% VA : S% VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_assessment that models this phase_

## TIS3 (S–Ti)

- Id: `phase:s-ti:tis3`; status `assigned`
- Structure: ZrSe3 · mP8 · P2_1/m (11); type `st:zrse3-mp8`; 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, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
- Stability: stable in 1 of 1 calculated diagram(s): 300–838.84 K, x(S) 0.75–0.75
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:s-ti:tis3)

Names (2): _corpus: _corpus:phase:s-ti:tis3  
_tdb: _tdb:TiS-17Hir.tdb:TIS3  


### TDB models of TIS3 (1): PHASE and CONSTITUENT statements as written

[TiS-17Hir.tdb](https://orchid-project.org/data/databases/sgte-binary/TiS-17Hir.tdb): TIS3, type code %, sha256 `f4b8b71ea4278134…`

~~~~text
90: PHASE TIS3 % 2 1 3 !
91: CONST TIS3 : TI : S% VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2017.02.006](https://doi.org/10.1016/j.calphad.2017.02.006) K. Hirata, S. Iikubo, H. Fujimoto, H. Ohtani, Calphad, 57, 62-77(2017).  
_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).