Ir–Ti phases

8 phases (tier A 7, liquid 1); 8 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 · full JSON · Ir–Ti system page · Markdown · field reference

Phases of the Ir–Ti system (8)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:ir-ti:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 990–1940.98 K, x(Ti) 0.82957–1	9	1
FCC_A1 phase:ir-ti:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2725 K, x(Ti) 0–0.09969	4	1
HCP_A3 phase:ir-ti:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1939.99 K, x(Ti) 0.99558–1	5	1
IR3TI_L12 phase:ir-ti:ir3ti-l12	AuCu3 · L1_2 · cP4 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2387.95 K, x(Ti) 0.2238–0.27814	12	1
IRTI_B2 phase:ir-ti:irti-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2402.98 K, x(Ti) 0.42736–0.64635	16	1
IRTI_L10 phase:ir-ti:irti-l10	AuCu · L1_0 · tP4 · P4/mmm (123)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2023.98 K, x(Ti) 0.41624–0.56398	0	1
IRTI3_A15 phase:ir-ti:irti3-a15	Cr3Si · A15 · cP8 · Pm-3n (223)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1789.1 K, x(Ti) 0.72966–0.76187	13	1
LIQUID phase:ir-ti:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1740.19–4000 K, x(Ti) 0–1	20	1

BCC_A2 (Ir–Ti)

Id: phase:ir-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): 990–1940.98 K, x(Ti) 0.82957–1
Literature: 9 values (9 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ir-ti:bcc-a2
paper: paper:10.1007/s11669-014-0302-1:(βTi)
tdb: tdb:IrTi-14Wan.tdb:BCC_A2

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

IrTi-14Wan.tdb: BCC_A2, type code %B, sha256 b451b67f1b3cf0c9…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : IR TI% : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-014-0302-1 Cuiping Wang, Yihui Guo, Yong Lu, Xingjun Liu, Thermodynamic Assessment of the Ti-Ir System, J. Phase Equilib. Diffus. 35, 269-275 (2014).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02667568 H. Okamoto, Ir-Ti (Iridium-Titanium), J. Phase Equilib., 1992, 13, p 329-331
cited as the source of values for this phase

FCC_A1 (Ir–Ti)

Id: phase:ir-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: stable in 1 of 1 calculated diagram(s): 300–2725 K, x(Ti) 0–0.09969
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ir-ti:fcc-a1
paper: paper:10.1007/s11669-014-0302-1:(Ir)
tdb: tdb:IrTi-14Wan.tdb:FCC_A1

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

IrTi-14Wan.tdb: FCC_A1, type code %A, sha256 b451b67f1b3cf0c9…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : IR% TI : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-014-0302-1 Cuiping Wang, Yihui Guo, Yong Lu, Xingjun Liu, Thermodynamic Assessment of the Ti-Ir System, J. Phase Equilib. Diffus. 35, 269-275 (2014).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02667568 H. Okamoto, Ir-Ti (Iridium-Titanium), J. Phase Equilib., 1992, 13, p 329-331
cited as the source of values for this phase

HCP_A3 (Ir–Ti)

Id: phase:ir-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): 300–1939.99 K, x(Ti) 0.99558–1
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ir-ti:hcp-a3
paper: paper:10.1007/s11669-014-0302-1:(αTi)
tdb: tdb:IrTi-14Wan.tdb:HCP_A3

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

IrTi-14Wan.tdb: HCP_A3, type code %A, sha256 b451b67f1b3cf0c9…

41: PHASE HCP_A3 %A 2 1 0.5 !
42: CONST HCP_A3 : IR TI% : VA: !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-014-0302-1 Cuiping Wang, Yihui Guo, Yong Lu, Xingjun Liu, Thermodynamic Assessment of the Ti-Ir System, J. Phase Equilib. Diffus. 35, 269-275 (2014).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02667568 H. Okamoto, Ir-Ti (Iridium-Titanium), J. Phase Equilib., 1992, 13, p 329-331
cited as the source of values for this phase

IR3TI_L12 (Ir–Ti)

Id: phase:ir-ti:ir3ti-l12; status assigned
Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type st:l1-2-aucu3-cp4; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in IrTi-14Wan.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–2387.95 K, x(Ti) 0.2238–0.27814
Literature: 12 values (12 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ir-ti:ir3ti-l12
paper: paper:10.1007/s11669-014-0302-1:TiIr3
tdb: tdb:IrTi-14Wan.tdb:IR3TI_L12

TDB models of IR3TI_L12 (1): PHASE and CONSTITUENT statements as written

IrTi-14Wan.tdb: IR3TI_L12, type code %, sha256 b451b67f1b3cf0c9…

46: PHASE IR3TI_L12 %  2 3 1 !
47: CONST IR3TI_L12 : IR% TI : IR TI% : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-014-0302-1 Cuiping Wang, Yihui Guo, Yong Lu, Xingjun Liu, Thermodynamic Assessment of the Ti-Ir System, J. Phase Equilib. Diffus. 35, 269-275 (2014).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02667568 H. Okamoto, Ir-Ti (Iridium-Titanium), J. Phase Equilib., 1992, 13, p 329-331
cited as the source of values for this phase

IRTI_B2 (Ir–Ti)

Id: phase:ir-ti:irti-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in IrTi-14Wan.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–2402.98 K, x(Ti) 0.42736–0.64635
Literature: 16 values (16 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ir-ti:irti-b2
paper: paper:10.1007/s11669-014-0302-1:γTiIr
tdb: tdb:IrTi-14Wan.tdb:IRTI_B2

TDB models of IRTI_B2 (1): PHASE and CONSTITUENT statements as written

IrTi-14Wan.tdb: IRTI_B2, type code %, sha256 b451b67f1b3cf0c9…

56: PHASE IRTI_B2 %  2 1 1 !
57: CONST IRTI_B2 : IR% TI : IR TI% : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-014-0302-1 Cuiping Wang, Yihui Guo, Yong Lu, Xingjun Liu, Thermodynamic Assessment of the Ti-Ir System, J. Phase Equilib. Diffus. 35, 269-275 (2014).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02667568 H. Okamoto, Ir-Ti (Iridium-Titanium), J. Phase Equilib., 1992, 13, p 329-331
cited as the source of values for this phase

IRTI_L10 (Ir–Ti)

Id: phase:ir-ti:irti-l10; status assigned
Structure: AuCu · L1_0 · tP4 · P4/mmm (123); type st:l1-0-aucu-tp4; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in IrTi-14Wan.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–2023.98 K, x(Ti) 0.41624–0.56398
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ir-ti:irti-l10
tdb: tdb:IrTi-14Wan.tdb:IRTI_L10

TDB models of IRTI_L10 (1): PHASE and CONSTITUENT statements as written

IrTi-14Wan.tdb: IRTI_L10, type code %, sha256 b451b67f1b3cf0c9…

51: PHASE IRTI_L10 %  2 1 1 !
52: CONST IRTI_L10 : IR% TI : IR TI% : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-014-0302-1 Cuiping Wang, Yihui Guo, Yong Lu, Xingjun Liu, Thermodynamic Assessment of the Ti-Ir System, J. Phase Equilib. Diffus. 35, 269-275 (2014).
assessment that models this phase

IRTI3_A15 (Ir–Ti)

Id: phase:ir-ti:irti3-a15; status assigned
Structure: Cr3Si · A15 · cP8 · Pm-3n (223); type st:a15-cr3si-cp8; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in IrTi-14Wan.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–1789.1 K, x(Ti) 0.72966–0.76187
Literature: 13 values (13 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ir-ti:irti3-a15
paper: paper:10.1007/s11669-014-0302-1:Ti3Ir
tdb: tdb:IrTi-14Wan.tdb:IRTI3_A15

TDB models of IRTI3_A15 (1): PHASE and CONSTITUENT statements as written

IrTi-14Wan.tdb: IRTI3_A15, type code %, sha256 b451b67f1b3cf0c9…

61: PHASE IRTI3_A15 %  2 1 3 !
62: CONST IRTI3_A15 : IR% TI : IR TI% : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-014-0302-1 Cuiping Wang, Yihui Guo, Yong Lu, Xingjun Liu, Thermodynamic Assessment of the Ti-Ir System, J. Phase Equilib. Diffus. 35, 269-275 (2014).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02667568 H. Okamoto, Ir-Ti (Iridium-Titanium), J. Phase Equilib., 1992, 13, p 329-331
cited as the source of values for this phase

LIQUID (Ir–Ti)

Id: phase:ir-ti:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1740.19–4000 K, x(Ti) 0–1
Literature: 20 values (20 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ir-ti:liquid
paper: paper:10.1007/s11669-014-0302-1:L
tdb: tdb:IrTi-14Wan.tdb:LIQUID

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

IrTi-14Wan.tdb: LIQUID, type code %, sha256 b451b67f1b3cf0c9…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : IR TI : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-014-0302-1 Cuiping Wang, Yihui Guo, Yong Lu, Xingjun Liu, Thermodynamic Assessment of the Ti-Ir System, J. Phase Equilib. Diffus. 35, 269-275 (2014).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02667568 H. Okamoto, Ir-Ti (Iridium-Titanium), J. Phase Equilib., 1992, 13, p 329-331
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). doi: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). doi: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.

@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}
}