# Ir–Zr phases

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

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

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

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

Table: Phases of the Ir–Zr system (11)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [BCC_A2](#phase-ir-zr-bcc-a2); _phase:ir-zr:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1047.74–2177.6 K, x(Zr) 0.93188–1 | 4 | 1 |
| [FCC_A1](#phase-ir-zr-fcc-a1); _phase:ir-zr:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2719 K, x(Zr) 0–0.08758 | 2 | 1 |
| [HCP_A3](#phase-ir-zr-hcp-a3); _phase:ir-zr:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2123.99 K, x(Zr) 0.992–1 | 2 | 1 |
| [IR2ZR_C15](#phase-ir-zr-ir2zr-c15); _phase:ir-zr:ir2zr-c15_ | Cu2Mg · C15 · cF24 · Fd-3m (227) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2358.36 K, x(Zr) 0.33333–0.33333 | 6 | 1 |
| [IR3ZR_L12](#phase-ir-zr-ir3zr-l12); _phase:ir-zr:ir3zr-l12_ | AuCu3 · L1_2 · cP4 · Pm-3m (221) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2552.99 K, x(Zr) 0.18501–0.30176 | 6 | 1 |
| [IR3ZR5](#phase-ir-zr-ir3zr5); _phase:ir-zr:ir3zr5_ | Ir3Zr5 · hP48 · P6_122 (178) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–2003.07 K, x(Zr) 0.625–0.625 | 6 | 1 |
| [IRZR_ALPHA](#phase-ir-zr-irzr-alpha); _phase:ir-zr:irzr-alpha_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–1223.02 K, x(Zr) 0.5–0.50293 | 4 | 1 |
| [IRZR_B2](#phase-ir-zr-irzr-b2); _phase:ir-zr:irzr-b2_ | CsCl · B2 · cP2 · Pm-3m (221) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1173.01–2322.86 K, x(Zr) 0.48832–0.54511 | 10 | 1 |
| [IRZR2_C16](#phase-ir-zr-irzr2-c16); _phase:ir-zr:irzr2-c16_ | Al2Cu · C16 · tI12 · I4/mcm (140) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1613 K, x(Zr) 0.66667–0.66667 | 4 | 1 |
| [IRZR3](#phase-ir-zr-irzr3); _phase:ir-zr:irzr3_ | V3S · tI32 · I-42m (121) | tier B: DFT-supported (unique MP + OQMD match) | stable in 1 of 1 calculated diagram(s): 300–1578.23 K, x(Zr) 0.75–0.75 | 6 | 1 |
| [LIQUID](#phase-ir-zr-liquid); _phase:ir-zr:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 1512.6–4000 K, x(Zr) 0–1 | 18 | 1 |

## BCC_A2 (Ir–Zr)

- Id: `phase:ir-zr: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): 1047.74–2177.6 K, x(Zr) 0.93188–1
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ir-zr:bcc-a2)

Names (3): _corpus: _corpus:phase:ir-zr:bcc-a2  
_paper: _paper:10.1016/j.jallcom.2005.06.060:bcc(Zr)  
_tdb: _tdb:IrZr-06Ran-LB.tdb:BCC_A2  


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

[IrZr-06Ran-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/IrZr-06Ran-LB.tdb): BCC_A2, type code %B, sha256 `3cccb56ac9c0e55c…`

~~~~text
36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : IR ZR% : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.06.060](https://doi.org/10.1016/j.jallcom.2005.06.060) Hongtao Ran, Zhenmin Du, Thermodynamic assessment of the Ir–Zr system, Journal of Alloys and Compounds 413, 101-105 (2006).  
_assessment that models this phase; reports values for this phase_

## FCC_A1 (Ir–Zr)

- Id: `phase:ir-zr: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): 300–2719 K, x(Zr) 0–0.08758
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ir-zr:fcc-a1)

Names (3): _corpus: _corpus:phase:ir-zr:fcc-a1  
_paper: _paper:10.1016/j.jallcom.2005.06.060:fcc(Ir)  
_tdb: _tdb:IrZr-06Ran-LB.tdb:FCC_A1  


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

[IrZr-06Ran-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/IrZr-06Ran-LB.tdb): FCC_A1, type code %A, sha256 `3cccb56ac9c0e55c…`

~~~~text
31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : IR% ZR : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.06.060](https://doi.org/10.1016/j.jallcom.2005.06.060) Hongtao Ran, Zhenmin Du, Thermodynamic assessment of the Ir–Zr system, Journal of Alloys and Compounds 413, 101-105 (2006).  
_assessment that models this phase; reports values for this phase_

## HCP_A3 (Ir–Zr)

- Id: `phase:ir-zr: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): 300–2123.99 K, x(Zr) 0.992–1
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ir-zr:hcp-a3)

Names (3): _corpus: _corpus:phase:ir-zr:hcp-a3  
_paper: _paper:10.1016/j.jallcom.2005.06.060:hcp(Zr)  
_tdb: _tdb:IrZr-06Ran-LB.tdb:HCP_A3  


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

[IrZr-06Ran-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/IrZr-06Ran-LB.tdb): HCP_A3, type code %A, sha256 `3cccb56ac9c0e55c…`

~~~~text
41: PHASE HCP_A3 %A 2 1 0.5 !
42: CONST HCP_A3 : IR ZR% : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.06.060](https://doi.org/10.1016/j.jallcom.2005.06.060) Hongtao Ran, Zhenmin Du, Thermodynamic assessment of the Ir–Zr system, Journal of Alloys and Compounds 413, 101-105 (2006).  
_assessment that models this phase; reports values for this phase_

## IR2ZR_C15 (Ir–Zr)

- Id: `phase:ir-zr:ir2zr-c15`; status `assigned`
- Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type `st:c15-cu2mg-cf24`; tier A: standard phase name; confidence high
- Stoichiometry: Ir 0.6667, Zr 0.3333
- Stability: stable in 1 of 1 calculated diagram(s): 300–2358.36 K, x(Zr) 0.33333–0.33333
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ir-zr:ir2zr-c15)

Names (3): _corpus: _corpus:phase:ir-zr:ir2zr-c15  
_paper: _paper:10.1016/j.jallcom.2005.06.060:Ir2Zr  
_tdb: _tdb:IrZr-06Ran-LB.tdb:IR2ZR_C15  


### TDB models of IR2ZR_C15 (1): PHASE and CONSTITUENT statements as written

[IrZr-06Ran-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/IrZr-06Ran-LB.tdb): IR2ZR_C15, type code %, sha256 `3cccb56ac9c0e55c…`

~~~~text
51: PHASE IR2ZR_C15 % 2 2 1 !
52: CONST IR2ZR_C15 : IR : ZR : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.06.060](https://doi.org/10.1016/j.jallcom.2005.06.060) Hongtao Ran, Zhenmin Du, Thermodynamic assessment of the Ir–Zr system, Journal of Alloys and Compounds 413, 101-105 (2006).  
_assessment that models this phase; reports values for this phase_

## IR3ZR_L12 (Ir–Zr)

- Id: `phase:ir-zr:ir3zr-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 IrZr-06Ran-LB.tdb also describes the disordered state
- Stability: stable in 1 of 1 calculated diagram(s): 300–2552.99 K, x(Zr) 0.18501–0.30176
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ir-zr:ir3zr-l12)

Names (3): _corpus: _corpus:phase:ir-zr:ir3zr-l12  
_paper: _paper:10.1016/j.jallcom.2005.06.060:Ir3Zr  
_tdb: _tdb:IrZr-06Ran-LB.tdb:IR3ZR_L12  


### TDB models of IR3ZR_L12 (1): PHASE and CONSTITUENT statements as written

[IrZr-06Ran-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/IrZr-06Ran-LB.tdb): IR3ZR_L12, type code %, sha256 `3cccb56ac9c0e55c…`

~~~~text
46: PHASE IR3ZR_L12 % 2 3 1 !
47: CONST IR3ZR_L12 : IR% ZR : IR ZR% : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.06.060](https://doi.org/10.1016/j.jallcom.2005.06.060) Hongtao Ran, Zhenmin Du, Thermodynamic assessment of the Ir–Zr system, Journal of Alloys and Compounds 413, 101-105 (2006).  
_assessment that models this phase; reports values for this phase_

## IR3ZR5 (Ir–Zr)

- Id: `phase:ir-zr:ir3zr5`; status `assigned`
- Structure: Ir3Zr5 · hP48 · P6_122 (178); type `st:ir3zr5-hp48`; 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 (mp_oqmd_space_groups_differ, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Ir 0.3750, Zr 0.6250
- Stability: stable in 1 of 1 calculated diagram(s): 300–2003.07 K, x(Zr) 0.625–0.625
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ir-zr:ir3zr5)

Names (3): _corpus: _corpus:phase:ir-zr:ir3zr5  
_paper: _paper:10.1016/j.jallcom.2005.06.060:Ir3Zr5  
_tdb: _tdb:IrZr-06Ran-LB.tdb:IR3ZR5  


### TDB models of IR3ZR5 (1): PHASE and CONSTITUENT statements as written

[IrZr-06Ran-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/IrZr-06Ran-LB.tdb): IR3ZR5, type code %, sha256 `3cccb56ac9c0e55c…`

~~~~text
66: PHASE IR3ZR5 % 2 3 5 !
67: CONST IR3ZR5 : IR : ZR : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.06.060](https://doi.org/10.1016/j.jallcom.2005.06.060) Hongtao Ran, Zhenmin Du, Thermodynamic assessment of the Ir–Zr system, Journal of Alloys and Compounds 413, 101-105 (2006).  
_assessment that models this phase; reports values for this phase_

## IRZR_ALPHA (Ir–Zr)

- Id: `phase:ir-zr:irzr-alpha`; status `needs_review`
- No structure assigned. Why: no_structure_token; off_stoichiometric_model; sgte_mmc2_row_incomplete
- Candidate (dft_mp): Cmcm (63) — on-hull MP ZrIr at x(ZR)=0.5000
- Candidate (dft_oqmd): Cmcm (63) — on-hull OQMD Ir1 Zr1 at x(ZR)=0.5000
- Candidate (sgte_mmc2): (alpha-IrZr) — Hallstedt 2025 mmc2 row for IRZR_ALPHA: alpha-IrZr
- Stability: stable in 1 of 1 calculated diagram(s): 300–1223.02 K, x(Zr) 0.5–0.50293
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ir-zr:irzr-alpha)

Names (3): _corpus: _corpus:phase:ir-zr:irzr-alpha  
_paper: _paper:10.1016/j.jallcom.2005.06.060:αIrZr  
_tdb: _tdb:IrZr-06Ran-LB.tdb:IRZR_ALPHA  


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

[IrZr-06Ran-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/IrZr-06Ran-LB.tdb): IRZR_ALPHA, type code %, sha256 `3cccb56ac9c0e55c…`

~~~~text
56: PHASE IRZR_ALPHA % 2 1 1 !
57: CONST IRZR_ALPHA : IR% ZR : ZR : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.06.060](https://doi.org/10.1016/j.jallcom.2005.06.060) Hongtao Ran, Zhenmin Du, Thermodynamic assessment of the Ir–Zr system, Journal of Alloys and Compounds 413, 101-105 (2006).  
_assessment that models this phase; reports values for this phase_

## IRZR_B2 (Ir–Zr)

- Id: `phase:ir-zr:irzr-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 IrZr-06Ran-LB.tdb also describes the disordered state
- Stability: stable in 1 of 1 calculated diagram(s): 1173.01–2322.86 K, x(Zr) 0.48832–0.54511
- Literature: 10 values (10 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ir-zr:irzr-b2)

Names (3): _corpus: _corpus:phase:ir-zr:irzr-b2  
_paper: _paper:10.1016/j.jallcom.2005.06.060:βIrZr  
_tdb: _tdb:IrZr-06Ran-LB.tdb:IRZR_B2  


### TDB models of IRZR_B2 (1): PHASE and CONSTITUENT statements as written

[IrZr-06Ran-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/IrZr-06Ran-LB.tdb): IRZR_B2, type code %, sha256 `3cccb56ac9c0e55c…`

~~~~text
61: PHASE IRZR_B2 % 2 1 1 !
62: CONST IRZR_B2 : IR% ZR : IR ZR% : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.06.060](https://doi.org/10.1016/j.jallcom.2005.06.060) Hongtao Ran, Zhenmin Du, Thermodynamic assessment of the Ir–Zr system, Journal of Alloys and Compounds 413, 101-105 (2006).  
_assessment that models this phase; reports values for this phase_

## IRZR2_C16 (Ir–Zr)

- Id: `phase:ir-zr:irzr2-c16`; status `assigned`
- Structure: Al2Cu · C16 · tI12 · I4/mcm (140); type `st:c16-al2cu-ti12`; tier A: standard phase name; confidence high
- Stoichiometry: Ir 0.3333, Zr 0.6667
- Stability: stable in 1 of 1 calculated diagram(s): 300–1613 K, x(Zr) 0.66667–0.66667
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ir-zr:irzr2-c16)

Names (3): _corpus: _corpus:phase:ir-zr:irzr2-c16  
_paper: _paper:10.1016/j.jallcom.2005.06.060:IrZr2  
_tdb: _tdb:IrZr-06Ran-LB.tdb:IRZR2_C16  


### TDB models of IRZR2_C16 (1): PHASE and CONSTITUENT statements as written

[IrZr-06Ran-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/IrZr-06Ran-LB.tdb): IRZR2_C16, type code %, sha256 `3cccb56ac9c0e55c…`

~~~~text
71: PHASE IRZR2_C16 % 2 1 2 !
72: CONST IRZR2_C16 : IR : ZR : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.06.060](https://doi.org/10.1016/j.jallcom.2005.06.060) Hongtao Ran, Zhenmin Du, Thermodynamic assessment of the Ir–Zr system, Journal of Alloys and Compounds 413, 101-105 (2006).  
_assessment that models this phase; reports values for this phase_

## IRZR3 (Ir–Zr)

- Id: `phase:ir-zr:irzr3`; status `assigned`
- Structure: V3S · tI32 · I-42m (121); type `st:v3s-ti32`; tier B: DFT-supported (unique MP + OQMD match); confidence high
- Stoichiometry: Ir 0.2500, Zr 0.7500
- Stability: stable in 1 of 1 calculated diagram(s): 300–1578.23 K, x(Zr) 0.75–0.75
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ir-zr:irzr3)

Names (5): _corpus: _corpus:phase:ir-zr:irzr3  
_mp: _mp:mp-aaaabtmq  
_oqmd: _oqmd:oqmd-17542  
_paper: _paper:10.1016/j.jallcom.2005.06.060:IrZr3  
_tdb: _tdb:IrZr-06Ran-LB.tdb:IRZR3  


### TDB models of IRZR3 (1): PHASE and CONSTITUENT statements as written

[IrZr-06Ran-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/IrZr-06Ran-LB.tdb): IRZR3, type code %, sha256 `3cccb56ac9c0e55c…`

~~~~text
76: PHASE IRZR3 % 2 1 3 !
77: CONST IRZR3 : IR : ZR : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.06.060](https://doi.org/10.1016/j.jallcom.2005.06.060) Hongtao Ran, Zhenmin Du, Thermodynamic assessment of the Ir–Zr system, Journal of Alloys and Compounds 413, 101-105 (2006).  
_assessment that models this phase; reports values for this phase_

## LIQUID (Ir–Zr)

- Id: `phase:ir-zr:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 1512.6–4000 K, x(Zr) 0–1
- Literature: 18 values (18 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ir-zr:liquid)

Names (3): _corpus: _corpus:phase:ir-zr:liquid  
_paper: _paper:10.1016/j.jallcom.2005.06.060:liquid  
_tdb: _tdb:IrZr-06Ran-LB.tdb:LIQUID  


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

[IrZr-06Ran-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/IrZr-06Ran-LB.tdb): LIQUID, type code %, sha256 `3cccb56ac9c0e55c…`

~~~~text
26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : IR ZR : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jallcom.2005.06.060](https://doi.org/10.1016/j.jallcom.2005.06.060) Hongtao Ran, Zhenmin Du, Thermodynamic assessment of the Ir–Zr system, Journal of Alloys and Compounds 413, 101-105 (2006).  
_assessment that models this phase; reports values for this phase_

## Please cite

- R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735970
- R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23736065

Also cite B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work).

Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

```bibtex
@misc{orchid_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_data_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23736065},
  url       = {https://doi.org/10.5281/zenodo.23736065},
  note      = {Version 1, machine-extracted}
}
```

---

Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).