# O–Ti phases

> O–Ti system: 22 phases (tier A 5, tier C 9, liquid 2, gas 2, needs_review 4); 20 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/O-TI.html · Markdown: https://data.orchid-project.org/phases/pages/O-TI.md

22 phases (tier A 5, tier C 9, liquid 2, gas 2, needs_review 4); 20 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=O-TI) · [full JSON](https://data.orchid-project.org/phases/systems/O-TI.json) · [O–Ti system page](https://data.orchid-project.org/systems/O-TI.html) · [Markdown](https://data.orchid-project.org/phases/pages/O-TI.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the O–Ti system (22)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [HALITE_B1](#phase-o-ti-b1-halite); _phase:o-ti:b1-halite_ | NaCl · B1 · cF8 · Fm-3m (225) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1211.07–2500 K, x(O) 0.33412–0.50744 | 0 | 1 |
| [B1_OXIDE](#phase-o-ti-b1-oxide); _phase:o-ti:b1-oxide_ | NaCl · B1 · cF8 · Fm-3m (225) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 4 |
| [BCC_A2](#phase-o-ti-bcc-a2); _phase:o-ti:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 1140–2016.42 K, x(O) 0–0.07978 | 2 | 5 |
| [RUTILE_C4](#phase-o-ti-c4-rutile); _phase:o-ti:c4-rutile_ | TiO2 · C4 · tP6 · P4_2/mnm (136) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 2 calculated diagram(s): 300–2142.05 K, x(O) 0.66441–0.66667 | 2 | 5 |
| [CORUNDUM_D51](#phase-o-ti-d51-corundum); _phase:o-ti:d51-corundum_ | alpha-Al2O3 · D5_1 · hR10 · R-3c (167) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 2 calculated diagram(s): 300–415 K, x(O) 0.6–0.6 | 10 | 5 |
| [FCC_A1](#phase-o-ti-fcc-a1); _phase:o-ti:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | not stable in 2 calculated diagram(s) | 0 | 5 |
| [GAS](#phase-o-ti-gas); _phase:o-ti:gas_ | gas | gas | stable in 1 of 2 calculated diagram(s): 300.57–2500 K, x(O) 0.99992–1 | 1 | 5 |
| [HCP_A3](#phase-o-ti-hcp-a3); _phase:o-ti:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2166.47 K, x(O) 0–0.33333 | 10 | 5 |
| [ION](#phase-o-ti-ion); _phase:o-ti:ion_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 1775.98–2500 K, x(O) 0–0.42818 | 0 | 3 |
| [LIQUID](#phase-o-ti-liquid); _phase:o-ti:liquid_ | liquid | liquid | stable in 2 of 2 calculated diagram(s): 1937.94–2500 K, x(O) 0–0.6684 | 17 | 5 |
| [O2GAS](#phase-o-ti-o2gas); _phase:o-ti:o2gas_ | gas | gas | stable in 1 of 2 calculated diagram(s): 300–1185 K, x(O) 1–1 | 0 | 5 |
| [TI10O19](#phase-o-ti-ti10o19); _phase:o-ti:ti10o19_ | Ti10O19 · aP58 · P-1 (2) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1971.73 K, x(O) 0.65517–0.65517 | 2 | 4 |
| [TI20O39](#phase-o-ti-ti20o39); _phase:o-ti:ti20o39_ | Ti20O39 · aP118 · P-1 (2) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 469.51–2029.55 K, x(O) 0.66102–0.66102 | 2 | 4 |
| [TI3O2](#phase-o-ti-ti3o2); _phase:o-ti:ti3o2_ | (Ti3O2) · hP5 · P6/mmm (191) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 2 calculated diagram(s): 300–335 K, x(O) 0.4–0.4 | 2 | 5 |
| [TI3O5](#phase-o-ti-ti3o5); _phase:o-ti:ti3o5_ |  | needs_review | stable in 1 of 2 calculated diagram(s): 785.4–2046.49 K, x(O) 0.625–0.625 | 9 | 5 |
| [TI4O7](#phase-o-ti-ti4o7); _phase:o-ti:ti4o7_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–1940.4 K, x(O) 0.63636–0.63636 | 4 | 4 |
| [TI5O9](#phase-o-ti-ti5o9); _phase:o-ti:ti5o9_ | Ti5O9 · aP28 · P-1 (2) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300.4–1950.45 K, x(O) 0.64286–0.64286 | 5 | 4 |
| [TI6O11](#phase-o-ti-ti6o11); _phase:o-ti:ti6o11_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300.45–1954.69 K, x(O) 0.64706–0.64706 | 2 | 4 |
| [TI7O13](#phase-o-ti-ti7o13); _phase:o-ti:ti7o13_ | Ti7O13 · aP40 · P-1 (2) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300.1–1957.6 K, x(O) 0.65–0.65 | 2 | 4 |
| [TI8O15](#phase-o-ti-ti8o15); _phase:o-ti:ti8o15_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300.1–1962.46 K, x(O) 0.65217–0.65217 | 2 | 4 |
| [TI9O17](#phase-o-ti-ti9o17); _phase:o-ti:ti9o17_ | Ti9O17 · aP52 · P-1 (2) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300.48–1965.48 K, x(O) 0.65385–0.65385 | 2 | 4 |
| [TIO_ALPHA](#phase-o-ti-tio-alpha); _phase:o-ti:tio-alpha_ | alpha-TiO · mC20 · C2/m (12) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1211.07 K, x(O) 0.5–0.5 | 6 | 5 |

## HALITE_B1 (O–Ti)

- Id: `phase:o-ti:b1-halite`; status `assigned`
- Structure: NaCl · B1 · cF8 · Fm-3m (225); type `st:b1-nacl-cf8`; tier A: standard phase name; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 1211.07–2500 K, x(O) 0.33412–0.50744
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:b1-halite)

Names (2): _corpus: _corpus:phase:o-ti:b1-halite  
_tdb: _tdb:TiO-94Lee.tdb:HALITE_B1  


### TDB models of HALITE_B1 (1): PHASE and CONSTITUENT statements as written

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): HALITE_B1, type code %, sha256 `997ef7bf750652c5…`

~~~~text
77: PHASE HALITE_B1:I % 3 1 1 1 !
78: CONST HALITE_B1:I : TI+2% TI+3 VA : TI VA : O-2 : !
~~~~

## B1_OXIDE (O–Ti)

- Id: `phase:o-ti:b1-oxide`; status `assigned`
- Structure: NaCl · B1 · cF8 · Fm-3m (225); type `st:b1-nacl-cf8`; 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:o-ti:b1-oxide)

Names (5): _corpus: _corpus:phase:o-ti:b1-oxide  
_tdb: _tdb:TiO-07Can.tdb:B1_OXIDE, tdb:TiO-15Ham.tdb:B1_OXIDE, tdb:TiO-17Ila.tdb:B1_OXIDE, tdb:TiO-17Yan.tdb:B1_OXIDE  


### TDB models of B1_OXIDE (4): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): B1_OXIDE, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
75: PHASE B1_OXIDE:I % 3 1 1 1 !
76: CONST B1_OXIDE:I : TI+2% TI+3 VA : TI VA : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): B1_OXIDE, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
64: PHASE B1_OXIDE:I % 2 1 1 !
65: CONST B1_OXIDE:I : TI TI+2% TI+3 VA : O-2% VA : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): B1_OXIDE, type code %, sha256 `8e488837402ac5c9…`

~~~~text
68: PHASE B1_OXIDE:I % 2 1 1 !
69: CONST B1_OXIDE:I : TI TI+2% TI+3 VA : O-2% VA : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): B1_OXIDE, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
78: PHASE B1_OXIDE:I % 2 1 1 !
79: CONST B1_OXIDE:I : TI TI+2% TI+3 VA : O-2% VA : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_

## BCC_A2 (O–Ti)

- Id: `phase:o-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 2 of 2 calculated diagram(s): 1140–2016.42 K, x(O) 0–0.07978
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:bcc-a2)

Names (7): _corpus: _corpus:phase:o-ti:bcc-a2  
_paper: _paper:10.1016/j.calphad.2007.01.009:bcc  
_tdb: _tdb:TiO-07Can.tdb:BCC_A2, tdb:TiO-15Ham.tdb:BCC_A2, tdb:TiO-17Ila.tdb:BCC_A2, tdb:TiO-17Yan.tdb:BCC_A2, tdb:TiO-94Lee.tdb:BCC_A2  


### TDB models of BCC_A2 (5): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): BCC_A2, type code %B, sha256 `46fa6a309adf9c1c…`

~~~~text
60: PHASE BCC_A2 %B 2 1 1 !
61: CONST BCC_A2 : TI : O VA% : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): BCC_A2, type code %B, sha256 `e95d8422ca5608f3…`

~~~~text
49: PHASE BCC_A2 %B 2 1 3 !
50: CONST BCC_A2 : TI : O VA% : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): BCC_A2, type code %B, sha256 `8e488837402ac5c9…`

~~~~text
53: PHASE BCC_A2 %B 2 1 3 !
54: CONST BCC_A2 : TI : O VA% : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): BCC_A2, type code %B, sha256 `f79af7f26633b1d6…`

~~~~text
63: PHASE BCC_A2 %B 2 1 3 !
64: CONST BCC_A2 : TI : O VA% : !
~~~~

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): BCC_A2, type code %B, sha256 `997ef7bf750652c5…`

~~~~text
62: PHASE BCC_A2 %B 2 1 3 !
63: CONST BCC_A2 : TI : O VA% : !
~~~~

Example references (5 of 5; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_
- [doi:10.1007/bf02873201](https://doi.org/10.1007/bf02873201) J. L. Murray, H. A. Wriedt, The O−Ti (Oxygen-Titanium) system, JPE 8, 148-165 (1987).  
_cited as the source of values for this phase_

## RUTILE_C4 (O–Ti)

- Id: `phase:o-ti:c4-rutile`; status `assigned`
- Structure: TiO2 · C4 · tP6 · P4_2/mnm (136); type `st:c4-tio2-tp6`; 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 (unrecognised_name_tokens:RUTILE); structure as stated in the SGTE crystallographic table for this phase name and system
- Stability: stable in 1 of 2 calculated diagram(s): 300–2142.05 K, x(O) 0.66441–0.66667
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:c4-rutile)

Names (7): _corpus: _corpus:phase:o-ti:c4-rutile  
_paper: _paper:10.1016/j.calphad.2007.01.009:TiO2  
_tdb: _tdb:TiO-07Can.tdb:RUTILE_C4, tdb:TiO-15Ham.tdb:RUTILE_C4, tdb:TiO-17Ila.tdb:RUTILE_C4, tdb:TiO-17Yan.tdb:RUTILE_C4, tdb:TiO-94Lee.tdb:RUTILE_C4  


### TDB models of RUTILE_C4 (5): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): RUTILE_C4, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
135: PHASE RUTILE_C4:I % 2 1 2 !
136: CONST RUTILE_C4:I : TI+3 TI+4 : O-2 VA : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): RUTILE_C4, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
124: PHASE RUTILE_C4:I % 2 1 2 !
125: CONST RUTILE_C4:I : TI+4 : O-2 VA-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): RUTILE_C4, type code %, sha256 `8e488837402ac5c9…`

~~~~text
128: PHASE RUTILE_C4:I % 2 1 2 !
129: CONST RUTILE_C4:I : TI+4 : O-2 VA-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): RUTILE_C4, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
138: PHASE RUTILE_C4:I % 2 1 2 !
139: CONST RUTILE_C4:I : TI+4 : O-2 VA-2 : !
~~~~

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): RUTILE_C4, type code %, sha256 `997ef7bf750652c5…`

~~~~text
99: PHASE RUTILE_C4:I % 2 1 2 !
100: CONST RUTILE_C4:I : TI+4 : O-2 : !
~~~~

Example references (5 of 5; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_
- [doi:10.1007/bf02873201](https://doi.org/10.1007/bf02873201) J. L. Murray, H. A. Wriedt, The O−Ti (Oxygen-Titanium) system, JPE 8, 148-165 (1987).  
_cited as the source of values for this phase_

## CORUNDUM_D51 (O–Ti)

- Id: `phase:o-ti:d51-corundum`; status `assigned`
- Structure: alpha-Al2O3 · D5_1 · hR10 · R-3c (167); type `st:d5-1-alpha-al2o3-hr10`; 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 (unrecognised_name_tokens:CORUNDUM); structure as stated in the SGTE crystallographic table for this phase name and system
- Stability: stable in 1 of 2 calculated diagram(s): 300–415 K, x(O) 0.6–0.6
- Literature: 10 values (10 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:d51-corundum)

Names (7): _corpus: _corpus:phase:o-ti:d51-corundum  
_paper: _paper:10.1016/j.calphad.2007.01.009:Ti2O3  
_tdb: _tdb:TiO-07Can.tdb:CORUNDUM_D51, tdb:TiO-15Ham.tdb:CORUNDUM_D51, tdb:TiO-17Ila.tdb:CORUNDUM_D51, tdb:TiO-17Yan.tdb:CORUNDUM_D51, tdb:TiO-94Lee.tdb:CORUNDUM_D51  


### TDB models of CORUNDUM_D51 (5): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): CORUNDUM_D51, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
85: PHASE CORUNDUM_D51:I % 2 2 3 !
86: CONST CORUNDUM_D51:I : TI+3 : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): CORUNDUM_D51, type code %A, sha256 `e95d8422ca5608f3…`

~~~~text
74: PHASE CORUNDUM_D51:I %A 2 2 3 !
75: CONST CORUNDUM_D51:I : TI+3 : O-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): CORUNDUM_D51, type code %A, sha256 `8e488837402ac5c9…`

~~~~text
78: PHASE CORUNDUM_D51:I %A 2 2 3 !
79: CONST CORUNDUM_D51:I : TI+3 : O-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): CORUNDUM_D51, type code %A, sha256 `f79af7f26633b1d6…`

~~~~text
88: PHASE CORUNDUM_D51:I %A 2 2 3 !
89: CONST CORUNDUM_D51:I : TI+3 : O-2 : !
~~~~

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): CORUNDUM_D51, type code %A, sha256 `997ef7bf750652c5…`

~~~~text
72: PHASE CORUNDUM_D51:I %A 2 2 3 !
73: CONST CORUNDUM_D51:I : TI+3 : O-2 : !
~~~~

Example references (5 of 5; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_
- [doi:10.1007/bf02873201](https://doi.org/10.1007/bf02873201) J. L. Murray, H. A. Wriedt, The O−Ti (Oxygen-Titanium) system, JPE 8, 148-165 (1987).  
_cited as the source of values for this phase_

## FCC_A1 (O–Ti)

- Id: `phase:o-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 2 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:fcc-a1)

Names (6): _corpus: _corpus:phase:o-ti:fcc-a1  
_tdb: _tdb:TiO-07Can.tdb:FCC_A1, tdb:TiO-15Ham.tdb:FCC_A1, tdb:TiO-17Ila.tdb:FCC_A1, tdb:TiO-17Yan.tdb:FCC_A1, tdb:TiO-94Lee.tdb:FCC_A1  


### TDB models of FCC_A1 (5): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): FCC_A1, type code %A, sha256 `46fa6a309adf9c1c…`

~~~~text
55: PHASE FCC_A1 %A 2 1 1 !
56: CONST FCC_A1 : TI : O VA% : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): FCC_A1, type code %A, sha256 `e95d8422ca5608f3…`

~~~~text
44: PHASE FCC_A1 %A 2 1 1 !
45: CONST FCC_A1 : TI : O VA% : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): FCC_A1, type code %A, sha256 `8e488837402ac5c9…`

~~~~text
48: PHASE FCC_A1 %A 2 1 1 !
49: CONST FCC_A1 : TI : O VA% : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): FCC_A1, type code %A, sha256 `f79af7f26633b1d6…`

~~~~text
58: PHASE FCC_A1 %A 2 1 1 !
59: CONST FCC_A1 : TI : O VA% : !
~~~~

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): FCC_A1, type code %A, sha256 `997ef7bf750652c5…`

~~~~text
57: PHASE FCC_A1 %A 2 1 1 !
58: CONST FCC_A1 : TI : O VA% : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_

## GAS (O–Ti)

- Id: `phase:o-ti:gas`; status `assigned`
- Structure: gas; type `st:gas`; gas; confidence high
- Stability: stable in 1 of 2 calculated diagram(s): 300.57–2500 K, x(O) 0.99992–1
- Literature: 1 values (1 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:gas)

Names (7): _corpus: _corpus:phase:o-ti:gas  
_paper: _paper:10.1016/j.calphad.2007.01.009:gas  
_tdb: _tdb:TiO-07Can.tdb:GAS, tdb:TiO-15Ham.tdb:GAS, tdb:TiO-17Ila.tdb:GAS, tdb:TiO-17Yan.tdb:GAS, tdb:TiO-94Lee.tdb:GAS  


### TDB models of GAS (5): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): GAS, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
138: PHASE GAS:G % 1 1 !
139: CONST GAS:G : O O2% O3 TI TI2 TIO TIO2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): GAS, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
127: PHASE GAS:G % 1 1 !
128: CONST GAS:G : O O2% O3 TI TI2 TIO TIO2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): GAS, type code %, sha256 `8e488837402ac5c9…`

~~~~text
131: PHASE GAS:G % 1 1 !
132: CONST GAS:G : O O2% O3 TI TI2 TIO TIO2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): GAS, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
141: PHASE GAS:G % 1 1 !
142: CONST GAS:G : O O2% O3 TI TI2 TIO TIO2 : !
~~~~

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): GAS, type code %, sha256 `997ef7bf750652c5…`

~~~~text
102: PHASE GAS:G % 1 1 !
103: CONST GAS:G : O O2% O3 TI TI2 TIO TIO2: !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_

## HCP_A3 (O–Ti)

- Id: `phase:o-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 2 of 2 calculated diagram(s): 300–2166.47 K, x(O) 0–0.33333
- Literature: 10 values (10 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:hcp-a3)

Names (7): _corpus: _corpus:phase:o-ti:hcp-a3  
_paper: _paper:10.1016/j.calphad.2007.01.009:hcp  
_tdb: _tdb:TiO-07Can.tdb:HCP_A3, tdb:TiO-15Ham.tdb:HCP_A3, tdb:TiO-17Ila.tdb:HCP_A3, tdb:TiO-17Yan.tdb:HCP_A3, tdb:TiO-94Lee.tdb:HCP_A3  


### TDB models of HCP_A3 (5): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): HCP_A3, type code %A, sha256 `46fa6a309adf9c1c…`

~~~~text
65: PHASE HCP_A3 %A 2 1 0.5 !
66: CONST HCP_A3 : TI : O VA : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): HCP_A3, type code %A, sha256 `e95d8422ca5608f3…`

~~~~text
54: PHASE HCP_A3 %A 2 1 0.5 !
55: CONST HCP_A3 : TI : O VA : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): HCP_A3, type code %A, sha256 `8e488837402ac5c9…`

~~~~text
58: PHASE HCP_A3 %A 2 1 0.5 !
59: CONST HCP_A3 : TI : O VA : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): HCP_A3, type code %A, sha256 `f79af7f26633b1d6…`

~~~~text
68: PHASE HCP_A3 %A 2 1 0.5 !
69: CONST HCP_A3 : TI : O VA : !
~~~~

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): HCP_A3, type code %A, sha256 `997ef7bf750652c5…`

~~~~text
67: PHASE HCP_A3 %A 2 1 0.5 !
68: CONST HCP_A3 : TI : O VA : !
~~~~

Example references (5 of 5; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_
- [doi:10.1007/bf02873201](https://doi.org/10.1007/bf02873201) J. L. Murray, H. A. Wriedt, The O−Ti (Oxygen-Titanium) system, JPE 8, 148-165 (1987).  
_cited as the source of values for this phase_

## ION (O–Ti)

- Id: `phase:o-ti:ion`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 1775.98–2500 K, x(O) 0–0.42818
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:ion)

Names (4): _corpus: _corpus:phase:o-ti:ion  
_tdb: _tdb:TiO-17Ila.tdb:ION, tdb:TiO-17Yan.tdb:ION, tdb:TiO-94Lee.tdb:ION  


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

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): ION, type code %, sha256 `8e488837402ac5c9…`

~~~~text
40: PHASE ION:Y % 2 1 1 !
41: CONST ION:Y : TI+2 TI+3 : O-2 VA O TIO2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): ION, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
50: PHASE ION:Y % 2 1 1 !
51: CONST ION:Y : TI+2 : O-2 VA O TIO1.5 TIO2 : !
~~~~

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): ION, type code %, sha256 `997ef7bf750652c5…`

~~~~text
49: PHASE ION:Y % 2 1 1 !
50: CONST ION:Y : TI+2 TI+3 TI+4 : O-2 VA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_

## LIQUID (O–Ti)

- Id: `phase:o-ti:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 1937.94–2500 K, x(O) 0–0.6684
- Literature: 17 values (17 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:liquid)

Names (7): _corpus: _corpus:phase:o-ti:liquid  
_paper: _paper:10.1016/j.calphad.2007.01.009:liquid  
_tdb: _tdb:TiO-07Can.tdb:LIQUID, tdb:TiO-15Ham.tdb:LIQUID, tdb:TiO-17Ila.tdb:LIQUID, tdb:TiO-17Yan.tdb:LIQUID, tdb:TiO-94Lee.tdb:LIQUID  


### TDB models of LIQUID (5): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): LIQUID, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
50: PHASE LIQUID:L % 1 1 !
51: CONST LIQUID:L : O TI TIO TIO1.5 TIO2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): LIQUID, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
39: PHASE LIQUID:L % 1 1 !
40: CONST LIQUID:L : O TI TIO TIO1.5 TIO2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): LIQUID, type code %, sha256 `8e488837402ac5c9…`

~~~~text
43: PHASE LIQUID:L % 1 1 !
44: CONST LIQUID:L : O TI TIO TIO1.5 TIO2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): LIQUID, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
53: PHASE LIQUID:L % 1 1 !
54: CONST LIQUID:L : O TI TIO TIO1.5 TIO2 : !
~~~~

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): LIQUID, type code %, sha256 `997ef7bf750652c5…`

~~~~text
52: PHASE LIQUID:L % 1 1 !
53: CONST LIQUID:L : TI TIO TIO3/2 TIO2 : !
~~~~

Example references (5 of 5; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_
- [doi:10.1007/bf02873201](https://doi.org/10.1007/bf02873201) J. L. Murray, H. A. Wriedt, The O−Ti (Oxygen-Titanium) system, JPE 8, 148-165 (1987).  
_cited as the source of values for this phase_

## O2GAS (O–Ti)

- Id: `phase:o-ti:o2gas`; status `assigned`
- Structure: gas; type `st:gas`; gas; confidence high
- Stability: stable in 1 of 2 calculated diagram(s): 300–1185 K, x(O) 1–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:o2gas)

Names (6): _corpus: _corpus:phase:o-ti:o2gas  
_tdb: _tdb:TiO-07Can.tdb:O2GAS, tdb:TiO-15Ham.tdb:O2GAS, tdb:TiO-17Ila.tdb:O2GAS, tdb:TiO-17Yan.tdb:O2GAS, tdb:TiO-94Lee.tdb:O2GAS  


### TDB models of O2GAS (5): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): O2GAS, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
141: PHASE O2GAS % 1 1 !
142: CONST O2GAS : O2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): O2GAS, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
130: PHASE O2GAS % 1 1 !
131: CONST O2GAS : O2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): O2GAS, type code %, sha256 `8e488837402ac5c9…`

~~~~text
134: PHASE O2GAS % 1 1 !
135: CONST O2GAS : O2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): O2GAS, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
144: PHASE O2GAS % 1 1 !
145: CONST O2GAS : O2 : !
~~~~

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): O2GAS, type code %, sha256 `997ef7bf750652c5…`

~~~~text
105: PHASE O2GAS % 1 1 !
106: CONST O2GAS : O2 : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_

## TI10O19 (O–Ti)

- Id: `phase:o-ti:ti10o19`; status `assigned`
- Structure: Ti10O19 · aP58 · P-1 (2); type `st:ti10o19-ap58`; 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): 300–1971.73 K, x(O) 0.65517–0.65517
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:ti10o19)

Names (6): _corpus: _corpus:phase:o-ti:ti10o19  
_paper: _paper:10.1016/j.calphad.2007.01.009:Ti10O19  
_tdb: _tdb:TiO-07Can.tdb:TI10O19, tdb:TiO-15Ham.tdb:TI10O19, tdb:TiO-17Ila.tdb:TI10O19, tdb:TiO-17Yan.tdb:TI10O19  


### TDB models of TI10O19 (4): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): TI10O19, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
125: PHASE TI10O19:I % 3 2 8 19 !
126: CONST TI10O19:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): TI10O19, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
114: PHASE TI10O19:I % 3 2 8 19 !
115: CONST TI10O19:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): TI10O19, type code %, sha256 `8e488837402ac5c9…`

~~~~text
118: PHASE TI10O19:I % 3 2 8 19 !
119: CONST TI10O19:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): TI10O19, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
128: PHASE TI10O19:I % 3 2 8 19 !
129: CONST TI10O19:I : TI+3 : TI+4 : O-2 : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_

## TI20O39 (O–Ti)

- Id: `phase:o-ti:ti20o39`; status `assigned`
- Structure: Ti20O39 · aP118 · P-1 (2); type `st:ti20o39-ap118`; 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): 469.51–2029.55 K, x(O) 0.66102–0.66102
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:ti20o39)

Names (6): _corpus: _corpus:phase:o-ti:ti20o39  
_paper: _paper:10.1016/j.calphad.2007.01.009:Ti20O39  
_tdb: _tdb:TiO-07Can.tdb:TI20O39, tdb:TiO-15Ham.tdb:TI20O39, tdb:TiO-17Ila.tdb:TI20O39, tdb:TiO-17Yan.tdb:TI20O39  


### TDB models of TI20O39 (4): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): TI20O39, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
130: PHASE TI20O39:I % 3 2 18 39 !
131: CONST TI20O39:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): TI20O39, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
119: PHASE TI20O39:I % 3 2 18 39 !
120: CONST TI20O39:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): TI20O39, type code %, sha256 `8e488837402ac5c9…`

~~~~text
123: PHASE TI20O39:I % 3 2 18 39 !
124: CONST TI20O39:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): TI20O39, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
133: PHASE TI20O39:I % 3 2 18 39 !
134: CONST TI20O39:I : TI+3 : TI+4 : O-2 : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_

## TI3O2 (O–Ti)

- Id: `phase:o-ti:ti3o2`; status `assigned`
- Structure: (Ti3O2) · hP5 · P6/mmm (191); type `st:ti3o2-hp5`; 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 2 calculated diagram(s): 300–335 K, x(O) 0.4–0.4
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:ti3o2)

Names (7): _corpus: _corpus:phase:o-ti:ti3o2  
_paper: _paper:10.1016/j.calphad.2007.01.009:Ti3O2  
_tdb: _tdb:TiO-07Can.tdb:TI3O2, tdb:TiO-15Ham.tdb:TI3O2, tdb:TiO-17Ila.tdb:TI3O2, tdb:TiO-17Yan.tdb:TI3O2, tdb:TiO-94Lee.tdb:TI3O2  


### TDB models of TI3O2 (5): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): TI3O2, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
70: PHASE TI3O2:I % 3 2 1 2 !
71: CONST TI3O2:I : TI+2 : TI : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): TI3O2, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
59: PHASE TI3O2:I % 3 2 1 2 !
60: CONST TI3O2:I : TI+2 : TI : O-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): TI3O2, type code %, sha256 `8e488837402ac5c9…`

~~~~text
63: PHASE TI3O2:I % 3 2 1 2 !
64: CONST TI3O2:I : TI+2 : TI : O-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): TI3O2, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
73: PHASE TI3O2:I % 3 2 1 2 !
74: CONST TI3O2:I : TI+2 : TI : O-2 : !
~~~~

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): TI3O2, type code %, sha256 `997ef7bf750652c5…`

~~~~text
82: PHASE TI3O2:I % 3 1 2 2 !
83: CONST TI3O2:I : TI : TI+2 : O-2 : !
~~~~

Example references (5 of 5; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_
- [doi:10.1007/bf02873201](https://doi.org/10.1007/bf02873201) J. L. Murray, H. A. Wriedt, The O−Ti (Oxygen-Titanium) system, JPE 8, 148-165 (1987).  
_cited as the source of values for this phase_

## TI3O5 (O–Ti)

- Id: `phase:o-ti:ti3o5`; status `needs_review`
- No structure assigned. Why: no_structure_token; off_stoichiometric_model; sgte_mmc2_rows_disagree
- Candidate (literature_printed): Ta3N5 · oC32 — printed with a label mapped to this phase
- Candidate (sgte_mmc2): Ta3N5 · oC32 · Cmcm (63) — Hallstedt 2025 mmc2 row for TI3O5: Ti3O5 (beta ?)
- Candidate (sgte_mmc2): Ti3O5 · mC32 · C2/m (12) — Hallstedt 2025 mmc2 row for TI3O5: Ti3O5 (alpha ?)
- Candidate (sgte_mmc2): V3O5-ht · mC32 · C2/c (15) — Hallstedt 2025 mmc2 row for TI3O5: Ti3O5 (gamma ?)
- Candidate (tdb_comment): Ti3O5 · mC32 · C2/m — TiO-07Can.tdb: 'Prototype Ti3O5 (mC32, C2/m)'
- Candidate (tdb_comment): Ti3O5 · mC32 · C2/m — TiO-15Ham.tdb: 'Prototype Ti3O5 (mC32, C2/m)'
- Candidate (tdb_comment): Ti3O5 · mC32 · C2/m — TiO-17Ila.tdb: 'Prototype Ti3O5 (mC32, C2/m)'
- Candidate (tdb_comment): Ti3O5 · mC32 · C2/m — TiO-17Yan.tdb: 'Prototype Ti3O5 (mC32, C2/m)'
- Stability: stable in 1 of 2 calculated diagram(s): 785.4–2046.49 K, x(O) 0.625–0.625
- Literature: 9 values (9 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:ti3o5)

Names (7): _corpus: _corpus:phase:o-ti:ti3o5  
_paper: _paper:10.1016/j.calphad.2007.01.009:Ti3O5  
_tdb: _tdb:TiO-07Can.tdb:TI3O5, tdb:TiO-15Ham.tdb:TI3O5, tdb:TiO-17Ila.tdb:TI3O5, tdb:TiO-17Yan.tdb:TI3O5, tdb:TiO-94Lee.tdb:TI3O5  


### TDB models of TI3O5 (5): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): TI3O5, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
90: PHASE TI3O5:I % 3 2 1 5 !
91: CONST TI3O5:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): TI3O5, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
79: PHASE TI3O5:I % 3 2 1 5 !
80: CONST TI3O5:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): TI3O5, type code %, sha256 `8e488837402ac5c9…`

~~~~text
83: PHASE TI3O5:I % 3 2 1 5 !
84: CONST TI3O5:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): TI3O5, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
93: PHASE TI3O5:I % 3 2 1 5 !
94: CONST TI3O5:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): TI3O5, type code %, sha256 `997ef7bf750652c5…`

~~~~text
94: PHASE TI3O5:I % 3 2 1 5 !
95: CONST TI3O5:I : TI+3 : TI+4 : O-2 : !
~~~~

Example references (5 of 5; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_
- [doi:10.1007/bf02873201](https://doi.org/10.1007/bf02873201) J. L. Murray, H. A. Wriedt, The O−Ti (Oxygen-Titanium) system, JPE 8, 148-165 (1987).  
_cited as the source of values for this phase_

## TI4O7 (O–Ti)

- Id: `phase:o-ti:ti4o7`; status `needs_review`
- No structure assigned. Why: no_structure_token; off_stoichiometric_model
- Candidate (tdb_comment): Ti4O7 · aP22 · P-1 — TiO-07Can.tdb: 'Prototype Ti4O7 (aP22, P-1)'
- Candidate (tdb_comment): Ti4O7 · aP22 · P-1 — TiO-15Ham.tdb: 'Prototype Ti4O7 (aP22, P-1)'
- Candidate (tdb_comment): Ti4O7 · aP22 · P-1 — TiO-17Ila.tdb: 'Prototype Ti4O7 (aP22, P-1)'
- Candidate (tdb_comment): Ti4O7 · aP22 · P-1 — TiO-17Yan.tdb: 'Prototype Ti4O7 (aP22, P-1)'
- Stability: stable in 1 of 1 calculated diagram(s): 300–1940.4 K, x(O) 0.63636–0.63636
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:ti4o7)

Names (6): _corpus: _corpus:phase:o-ti:ti4o7  
_paper: _paper:10.1016/j.calphad.2007.01.009:Ti4O7  
_tdb: _tdb:TiO-07Can.tdb:TI4O7, tdb:TiO-15Ham.tdb:TI4O7, tdb:TiO-17Ila.tdb:TI4O7, tdb:TiO-17Yan.tdb:TI4O7  


### TDB models of TI4O7 (4): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): TI4O7, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
95: PHASE TI4O7:I % 3 2 2 7 !
96: CONST TI4O7:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): TI4O7, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
84: PHASE TI4O7:I % 3 2 2 7 !
85: CONST TI4O7:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): TI4O7, type code %, sha256 `8e488837402ac5c9…`

~~~~text
88: PHASE TI4O7:I % 3 2 2 7 !
89: CONST TI4O7:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): TI4O7, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
98: PHASE TI4O7:I % 3 2 2 7 !
99: CONST TI4O7:I : TI+3 : TI+4 : O-2 : !
~~~~

Example references (5 of 5; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_
- [doi:10.1007/bf02873201](https://doi.org/10.1007/bf02873201) J. L. Murray, H. A. Wriedt, The O−Ti (Oxygen-Titanium) system, JPE 8, 148-165 (1987).  
_cited as the source of values for this phase_

## TI5O9 (O–Ti)

- Id: `phase:o-ti:ti5o9`; status `assigned`
- Structure: Ti5O9 · aP28 · P-1 (2); type `st:ti5o9-ap28`; 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): 300.4–1950.45 K, x(O) 0.64286–0.64286
- Literature: 5 values (5 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:ti5o9)

Names (6): _corpus: _corpus:phase:o-ti:ti5o9  
_paper: _paper:10.1016/j.calphad.2007.01.009:Ti5O9  
_tdb: _tdb:TiO-07Can.tdb:TI5O9, tdb:TiO-15Ham.tdb:TI5O9, tdb:TiO-17Ila.tdb:TI5O9, tdb:TiO-17Yan.tdb:TI5O9  


### TDB models of TI5O9 (4): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): TI5O9, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
100: PHASE TI5O9:I % 3 2 3 9 !
101: CONST TI5O9:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): TI5O9, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
89: PHASE TI5O9:I % 3 2 3 9 !
90: CONST TI5O9:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): TI5O9, type code %, sha256 `8e488837402ac5c9…`

~~~~text
93: PHASE TI5O9:I % 3 2 3 9 !
94: CONST TI5O9:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): TI5O9, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
103: PHASE TI5O9:I % 3 2 3 9 !
104: CONST TI5O9:I : TI+3 : TI+4 : O-2 : !
~~~~

Example references (5 of 5; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_
- [doi:10.1007/bf02873201](https://doi.org/10.1007/bf02873201) J. L. Murray, H. A. Wriedt, The O−Ti (Oxygen-Titanium) system, JPE 8, 148-165 (1987).  
_cited as the source of values for this phase_

## TI6O11 (O–Ti)

- Id: `phase:o-ti:ti6o11`; status `needs_review`
- No structure assigned. Why: no_structure_token; off_stoichiometric_model
- Candidate (tdb_comment): Ti6O11 · aP34 · P-1 — TiO-07Can.tdb: 'Prototype Ti6O11 (aP34, P-1)'
- Candidate (tdb_comment): Ti6O11 · aP34 · P-1 — TiO-15Ham.tdb: 'Prototype Ti6O11 (aP34, P-1)'
- Candidate (tdb_comment): Ti6O11 · aP34 · P-1 — TiO-17Ila.tdb: 'Prototype Ti6O11 (aP34, P-1)'
- Candidate (tdb_comment): Ti6O11 · aP34 · P-1 — TiO-17Yan.tdb: 'Prototype Ti6O11 (aP34, P-1)'
- Stability: stable in 1 of 1 calculated diagram(s): 300.45–1954.69 K, x(O) 0.64706–0.64706
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:ti6o11)

Names (6): _corpus: _corpus:phase:o-ti:ti6o11  
_paper: _paper:10.1016/j.calphad.2007.01.009:Ti6O11  
_tdb: _tdb:TiO-07Can.tdb:TI6O11, tdb:TiO-15Ham.tdb:TI6O11, tdb:TiO-17Ila.tdb:TI6O11, tdb:TiO-17Yan.tdb:TI6O11  


### TDB models of TI6O11 (4): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): TI6O11, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
105: PHASE TI6O11:I % 3 2 4 11 !
106: CONST TI6O11:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): TI6O11, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
94: PHASE TI6O11:I % 3 2 4 11 !
95: CONST TI6O11:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): TI6O11, type code %, sha256 `8e488837402ac5c9…`

~~~~text
98: PHASE TI6O11:I % 3 2 4 11 !
99: CONST TI6O11:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): TI6O11, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
108: PHASE TI6O11:I % 3 2 4 11 !
109: CONST TI6O11:I : TI+3 : TI+4 : O-2 : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_

## TI7O13 (O–Ti)

- Id: `phase:o-ti:ti7o13`; status `assigned`
- Structure: Ti7O13 · aP40 · P-1 (2); type `st:ti7o13-ap40`; 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): 300.1–1957.6 K, x(O) 0.65–0.65
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:ti7o13)

Names (6): _corpus: _corpus:phase:o-ti:ti7o13  
_paper: _paper:10.1016/j.calphad.2007.01.009:Ti7O13  
_tdb: _tdb:TiO-07Can.tdb:TI7O13, tdb:TiO-15Ham.tdb:TI7O13, tdb:TiO-17Ila.tdb:TI7O13, tdb:TiO-17Yan.tdb:TI7O13  


### TDB models of TI7O13 (4): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): TI7O13, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
110: PHASE TI7O13:I % 3 2 5 13 !
111: CONST TI7O13:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): TI7O13, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
99: PHASE TI7O13:I % 3 2 5 13 !
100: CONST TI7O13:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): TI7O13, type code %, sha256 `8e488837402ac5c9…`

~~~~text
103: PHASE TI7O13:I % 3 2 5 13 !
104: CONST TI7O13:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): TI7O13, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
113: PHASE TI7O13:I % 3 2 5 13 !
114: CONST TI7O13:I : TI+3 : TI+4 : O-2 : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_

## TI8O15 (O–Ti)

- Id: `phase:o-ti:ti8o15`; status `needs_review`
- No structure assigned. Why: no_structure_token; off_stoichiometric_model
- Candidate (tdb_comment): Ti8O15 · aP46 · P-1 — TiO-07Can.tdb: 'Prototype Ti8O15 (aP46, P-1)'
- Candidate (tdb_comment): Ti8O15 · aP46 · P-1 — TiO-15Ham.tdb: 'Prototype Ti8O15 (aP46, P-1)'
- Candidate (tdb_comment): Ti8O15 · aP46 · P-1 — TiO-17Ila.tdb: 'Prototype Ti8O15 (aP46, P-1)'
- Candidate (tdb_comment): Ti8O15 · aP46 · P-1 — TiO-17Yan.tdb: 'Prototype Ti8O15 (aP46, P-1)'
- Stability: stable in 1 of 1 calculated diagram(s): 300.1–1962.46 K, x(O) 0.65217–0.65217
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:ti8o15)

Names (6): _corpus: _corpus:phase:o-ti:ti8o15  
_paper: _paper:10.1016/j.calphad.2007.01.009:Ti8O15  
_tdb: _tdb:TiO-07Can.tdb:TI8O15, tdb:TiO-15Ham.tdb:TI8O15, tdb:TiO-17Ila.tdb:TI8O15, tdb:TiO-17Yan.tdb:TI8O15  


### TDB models of TI8O15 (4): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): TI8O15, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
115: PHASE TI8O15:I % 3 2 6 15 !
116: CONST TI8O15:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): TI8O15, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
104: PHASE TI8O15:I % 3 2 6 15 !
105: CONST TI8O15:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): TI8O15, type code %, sha256 `8e488837402ac5c9…`

~~~~text
108: PHASE TI8O15:I % 3 2 6 15 !
109: CONST TI8O15:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): TI8O15, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
118: PHASE TI8O15:I % 3 2 6 15 !
119: CONST TI8O15:I : TI+3 : TI+4 : O-2 : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_

## TI9O17 (O–Ti)

- Id: `phase:o-ti:ti9o17`; status `assigned`
- Structure: Ti9O17 · aP52 · P-1 (2); type `st:ti9o17-ap52`; 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): 300.48–1965.48 K, x(O) 0.65385–0.65385
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:ti9o17)

Names (6): _corpus: _corpus:phase:o-ti:ti9o17  
_paper: _paper:10.1016/j.calphad.2007.01.009:Ti9O17  
_tdb: _tdb:TiO-07Can.tdb:TI9O17, tdb:TiO-15Ham.tdb:TI9O17, tdb:TiO-17Ila.tdb:TI9O17, tdb:TiO-17Yan.tdb:TI9O17  


### TDB models of TI9O17 (4): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): TI9O17, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
120: PHASE TI9O17:I % 3 2 7 17 !
121: CONST TI9O17:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): TI9O17, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
109: PHASE TI9O17:I % 3 2 7 17 !
110: CONST TI9O17:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): TI9O17, type code %, sha256 `8e488837402ac5c9…`

~~~~text
113: PHASE TI9O17:I % 3 2 7 17 !
114: CONST TI9O17:I : TI+3 : TI+4 : O-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): TI9O17, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
123: PHASE TI9O17:I % 3 2 7 17 !
124: CONST TI9O17:I : TI+3 : TI+4 : O-2 : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_

## TIO_ALPHA (O–Ti)

- Id: `phase:o-ti:tio-alpha`; status `assigned`
- Structure: alpha-TiO · mC20 · C2/m (12); type `st:alpha-tio-mc20`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_structure_token, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
- Stability: stable in 2 of 2 calculated diagram(s): 300–1211.07 K, x(O) 0.5–0.5
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:o-ti:tio-alpha)

Names (7): _corpus: _corpus:phase:o-ti:tio-alpha  
_paper: _paper:10.1016/j.calphad.2007.01.009:α-TiO  
_tdb: _tdb:TiO-07Can.tdb:TIO_ALPHA, tdb:TiO-15Ham.tdb:TIO_ALPHA, tdb:TiO-17Ila.tdb:TIO_ALPHA, tdb:TiO-17Yan.tdb:TIO_ALPHA, tdb:TiO-94Lee.tdb:TIO_ALPHA  


### TDB models of TIO_ALPHA (5): PHASE and CONSTITUENT statements as written

[TiO-07Can.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-07Can.tdb): TIO_ALPHA, type code %, sha256 `46fa6a309adf9c1c…`

~~~~text
80: PHASE TIO_ALPHA:I % 2 1 1 !
81: CONST TIO_ALPHA:I : TI+2 : O-2 : !
~~~~

[TiO-15Ham.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-15Ham.tdb): TIO_ALPHA, type code %, sha256 `e95d8422ca5608f3…`

~~~~text
69: PHASE TIO_ALPHA:I % 2 1 1 !
70: CONST TIO_ALPHA:I : TI+2 : O-2 : !
~~~~

[TiO-17Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Ila.tdb): TIO_ALPHA, type code %, sha256 `8e488837402ac5c9…`

~~~~text
73: PHASE TIO_ALPHA:I % 2 1 1 !
74: CONST TIO_ALPHA:I : TI+2 : O-2 : !
~~~~

[TiO-17Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-17Yan.tdb): TIO_ALPHA, type code %, sha256 `f79af7f26633b1d6…`

~~~~text
83: PHASE TIO_ALPHA:I % 2 1 1 !
84: CONST TIO_ALPHA:I : TI+2 : O-2 : !
~~~~

[TiO-94Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/TiO-94Lee.tdb): TIO_ALPHA, type code %, sha256 `997ef7bf750652c5…`

~~~~text
87: PHASE TIO_ALPHA:I % 2 1 1 !
88: CONST TIO_ALPHA:I : TI+2 : O-2 : !
~~~~

Example references (5 of 5; assessments first): 

- [doi:10.1016/j.calphad.2007.01.009](https://doi.org/10.1016/j.calphad.2007.01.009) M. Cancarevic, M. Zinkevich, F. Aldinger, Thermodynamic description of the Ti–O system using the associate model for the liquid phase, Calphad 31, 330-342 (2007).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0509-4](https://doi.org/10.1007/s11669-016-0509-4) Mariia Ilatovskaia, Galina Savinykh, Olga Fabrichnaya, Thermodynamic Description of the Ti-Al-O System Based on Experimental Data, J. Phase Equilib. Diffus. 38, 175-184 (2017).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.05.326](https://doi.org/10.1016/j.jallcom.2017.05.326) Yang Yang, Huahai Mao, Hai-Lin Chen, Malin Selleby, An assessment of the Ti-V-O system, Journal of Alloys and Compounds 722, 365-374 (2017).  
_assessment that models this phase_
- [doi:10.3139/146.111210](https://doi.org/10.3139/146.111210) M. Hampl, R. Schmid-Fetzer, Int. J. Mater. Res., 106, 439-53(2015).  
_assessment that models this phase_
- [doi:10.1007/bf02873201](https://doi.org/10.1007/bf02873201) J. L. Murray, H. A. Wriedt, The O−Ti (Oxygen-Titanium) system, JPE 8, 148-165 (1987).  
_cited as the source of 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).