# Sn–Zn phases > Sn–Zn system: 6 phases (tier A 5, liquid 1); 3 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references. HTML: https://data.orchid-project.org/phases/pages/SN-ZN.html · Markdown: https://data.orchid-project.org/phases/pages/SN-ZN.md 6 phases (tier A 5, liquid 1); 3 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model). Data: [interactive registry](https://orchid-project.org/phases/?q=SN-ZN) · [full JSON](https://data.orchid-project.org/phases/systems/SN-ZN.json) · [Sn–Zn system page](https://data.orchid-project.org/systems/SN-ZN.html) · [Markdown](https://data.orchid-project.org/phases/pages/SN-ZN.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Sn–Zn system (6) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [DIAMOND_A4](#phase-sn-zn-a4-diamond); _phase:sn-zn:a4-diamond_ | C (diamond) · A4 · cF8 · Fd-3m (227) | tier A: standard phase name | not stable in 4 calculated diagram(s) | 0 | 4 | | [BCT_A5](#phase-sn-zn-a5-bct); _phase:sn-zn:a5-bct_ | beta-Sn · A5 · tI4 · I4_1/amd (141) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–505.08 K, x(Zn) 0–0.01231 | 8 | 4 | | [BCC_A2](#phase-sn-zn-bcc-a2); _phase:sn-zn:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | not stable in 4 calculated diagram(s) | 0 | 4 | | [FCC_A1](#phase-sn-zn-fcc-a1); _phase:sn-zn:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | not stable in 4 calculated diagram(s) | 0 | 4 | | [HCP_A3](#phase-sn-zn-hcp-a3); _phase:sn-zn:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–2498.93 K, x(Zn) 0.99684–1 | 8 | 4 | | [LIQUID](#phase-sn-zn-liquid); _phase:sn-zn:liquid_ | liquid | liquid | stable in 4 of 4 calculated diagram(s): 465.53–2500 K, x(Zn) 0–1 | 8 | 4 | ## DIAMOND_A4 (Sn–Zn) - Id: `phase:sn-zn:a4-diamond`; status `assigned` - Structure: C (diamond) · A4 · cF8 · Fd-3m (227); type `st:a4-c-diamond-cf8`; tier A: standard phase name; confidence high - Stability: not stable in 4 calculated diagram(s) - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-zn:a4-diamond) Names (5): _corpus: _corpus:phase:sn-zn:a4-diamond _tdb: _tdb:SnZn-93Sri.tdb:DIAMOND_A4, tdb:SnZn-96Lee.tdb:DIAMOND_A4, tdb:SnZn-98Fri-LB.tdb:DIAMOND_A4, tdb:SnZn-99Oht.tdb:DIAMOND_A4 ### TDB models of DIAMOND_A4 (4): PHASE and CONSTITUENT statements as written [SnZn-93Sri.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-93Sri.tdb): DIAMOND_A4, type code %, sha256 `a477685a7eeb967e…` ~~~~text 44: PHASE DIAMOND_A4 % 1 1 ! 45: CONST DIAMOND_A4 : SN : ! ~~~~ [SnZn-96Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-96Lee.tdb): DIAMOND_A4, type code %, sha256 `242f5b5ef74d7149…` ~~~~text 44: PHASE DIAMOND_A4 % 1 1 ! 45: CONST DIAMOND_A4 : SN% ZN : ! ~~~~ [SnZn-98Fri-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-98Fri-LB.tdb): DIAMOND_A4, type code %, sha256 `c592cd8539bbd468…` ~~~~text 40: PHASE DIAMOND_A4 % 1 1 ! 41: CONST DIAMOND_A4 : SN% ZN : ! ~~~~ [SnZn-99Oht.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-99Oht.tdb): DIAMOND_A4, type code %, sha256 `b9bc638c140accc3…` ~~~~text 43: PHASE DIAMOND_A4 % 1 1 ! 44: CONST DIAMOND_A4 : SN : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/BF02667882](https://doi.org/10.1007/BF02667882) M. Srivastava, R.C. Sharma, J. Phase Equilib., 14, 700-709(1993). _assessment that models this phase_ - [doi:10.1016/S0364-5916(97)00009-6](https://doi.org/10.1016/S0364-5916%2897%2900009-6) B.-J. Lee, Calphad, 20, 471-80(1996). _assessment that models this phase_ - [doi:10.2320/jinstmet1952.63.6_685](https://doi.org/10.2320/jinstmet1952.63.6_685) Hiroshi Ohtani, Masamitsu Miyashita, Kiyohito Ishida, Thermodynamic Study of Phase Equilibria in the Sn-Ag-Zn System, J.Japan Inst.Metals 63, 685-694 (1999). _assessment that models this phase_ ## BCT_A5 (Sn–Zn) - Id: `phase:sn-zn:a5-bct`; status `assigned` - Structure: beta-Sn · A5 · tI4 · I4_1/amd (141); type `st:a5-beta-sn-ti4`; tier A: standard phase name; confidence high - Stability: stable in 4 of 4 calculated diagram(s): 300–505.08 K, x(Zn) 0–0.01231 - Literature: 8 values (8 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-zn:a5-bct) Names (8): _corpus: _corpus:phase:sn-zn:a5-bct, corpus:phase:sn-zn:bct-a5 _paper: _paper:10.1007/bf02667882:(Sn), paper:sha256-85fd53a1a176b694:bct-A5 _tdb: _tdb:SnZn-93Sri.tdb:BCT_A5, tdb:SnZn-96Lee.tdb:BCT_A5, tdb:SnZn-98Fri-LB.tdb:BCT_A5, tdb:SnZn-99Oht.tdb:BCT_A5 ### TDB models of BCT_A5 (4): PHASE and CONSTITUENT statements as written [SnZn-93Sri.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-93Sri.tdb): BCT_A5, type code %, sha256 `a477685a7eeb967e…` ~~~~text 49: PHASE BCT_A5 % 1 1 ! 50: CONST BCT_A5 : SN% ZN : ! ~~~~ [SnZn-96Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-96Lee.tdb): BCT_A5, type code %, sha256 `242f5b5ef74d7149…` ~~~~text 49: PHASE BCT_A5 % 1 1 ! 50: CONST BCT_A5 : SN% ZN : ! ~~~~ [SnZn-98Fri-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-98Fri-LB.tdb): BCT_A5, type code %, sha256 `c592cd8539bbd468…` ~~~~text 45: PHASE BCT_A5 % 1 1 ! 46: CONST BCT_A5 : SN% ZN : ! ~~~~ [SnZn-99Oht.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-99Oht.tdb): BCT_A5, type code %, sha256 `b9bc638c140accc3…` ~~~~text 48: PHASE BCT_A5 % 1 1 ! 49: CONST BCT_A5 : SN% ZN : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/BF02667882](https://doi.org/10.1007/BF02667882) M. Srivastava, R.C. Sharma, J. Phase Equilib., 14, 700-709(1993). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/S0364-5916(97)00009-6](https://doi.org/10.1016/S0364-5916%2897%2900009-6) B.-J. Lee, Calphad, 20, 471-80(1996). _assessment that models this phase_ - [doi:10.2320/jinstmet1952.63.6_685](https://doi.org/10.2320/jinstmet1952.63.6_685) Hiroshi Ohtani, Masamitsu Miyashita, Kiyohito Ishida, Thermodynamic Study of Phase Equilibria in the Sn-Ag-Zn System, J.Japan Inst.Metals 63, 685-694 (1999). _assessment that models this phase_ ## BCC_A2 (Sn–Zn) - Id: `phase:sn-zn:bcc-a2`; status `assigned` - Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high - Stability: not stable in 4 calculated diagram(s) - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-zn:bcc-a2) Names (5): _corpus: _corpus:phase:sn-zn:bcc-a2 _tdb: _tdb:SnZn-93Sri.tdb:BCC_A2, tdb:SnZn-96Lee.tdb:BCC_A2, tdb:SnZn-98Fri-LB.tdb:BCC_A2, tdb:SnZn-99Oht.tdb:BCC_A2 ### TDB models of BCC_A2 (4): PHASE and CONSTITUENT statements as written [SnZn-93Sri.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-93Sri.tdb): BCC_A2, type code %B, sha256 `a477685a7eeb967e…` ~~~~text 34: PHASE BCC_A2 %B 2 1 3 ! 35: CONST BCC_A2 : SN ZN : VA : ! ~~~~ [SnZn-96Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-96Lee.tdb): BCC_A2, type code %B, sha256 `242f5b5ef74d7149…` ~~~~text 34: PHASE BCC_A2 %B 2 1 3 ! 35: CONST BCC_A2 : SN ZN : VA : ! ~~~~ [SnZn-98Fri-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-98Fri-LB.tdb): BCC_A2, type code %B, sha256 `c592cd8539bbd468…` ~~~~text 30: PHASE BCC_A2 %B 2 1 3 ! 31: CONST BCC_A2 : SN ZN : VA : ! ~~~~ [SnZn-99Oht.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-99Oht.tdb): BCC_A2, type code %B, sha256 `b9bc638c140accc3…` ~~~~text 33: PHASE BCC_A2 %B 2 1 3 ! 34: CONST BCC_A2 : SN ZN : VA : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/BF02667882](https://doi.org/10.1007/BF02667882) M. Srivastava, R.C. Sharma, J. Phase Equilib., 14, 700-709(1993). _assessment that models this phase_ - [doi:10.1016/S0364-5916(97)00009-6](https://doi.org/10.1016/S0364-5916%2897%2900009-6) B.-J. Lee, Calphad, 20, 471-80(1996). _assessment that models this phase_ - [doi:10.2320/jinstmet1952.63.6_685](https://doi.org/10.2320/jinstmet1952.63.6_685) Hiroshi Ohtani, Masamitsu Miyashita, Kiyohito Ishida, Thermodynamic Study of Phase Equilibria in the Sn-Ag-Zn System, J.Japan Inst.Metals 63, 685-694 (1999). _assessment that models this phase_ ## FCC_A1 (Sn–Zn) - Id: `phase:sn-zn: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 4 calculated diagram(s) - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-zn:fcc-a1) Names (5): _corpus: _corpus:phase:sn-zn:fcc-a1 _tdb: _tdb:SnZn-93Sri.tdb:FCC_A1, tdb:SnZn-96Lee.tdb:FCC_A1, tdb:SnZn-98Fri-LB.tdb:FCC_A1, tdb:SnZn-99Oht.tdb:FCC_A1 ### TDB models of FCC_A1 (4): PHASE and CONSTITUENT statements as written [SnZn-93Sri.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-93Sri.tdb): FCC_A1, type code %A, sha256 `a477685a7eeb967e…` ~~~~text 29: PHASE FCC_A1 %A 2 1 1 ! 30: CONST FCC_A1 : SN ZN : VA : ! ~~~~ [SnZn-96Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-96Lee.tdb): FCC_A1, type code %A, sha256 `242f5b5ef74d7149…` ~~~~text 29: PHASE FCC_A1 %A 2 1 1 ! 30: CONST FCC_A1 : SN ZN : VA : ! ~~~~ [SnZn-98Fri-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-98Fri-LB.tdb): FCC_A1, type code %A, sha256 `c592cd8539bbd468…` ~~~~text 25: PHASE FCC_A1 %A 2 1 1 ! 26: CONST FCC_A1 : SN ZN : VA : ! ~~~~ [SnZn-99Oht.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-99Oht.tdb): FCC_A1, type code %A, sha256 `b9bc638c140accc3…` ~~~~text 28: PHASE FCC_A1 %A 2 1 1 ! 29: CONST FCC_A1 : SN ZN : VA : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/BF02667882](https://doi.org/10.1007/BF02667882) M. Srivastava, R.C. Sharma, J. Phase Equilib., 14, 700-709(1993). _assessment that models this phase_ - [doi:10.1016/S0364-5916(97)00009-6](https://doi.org/10.1016/S0364-5916%2897%2900009-6) B.-J. Lee, Calphad, 20, 471-80(1996). _assessment that models this phase_ - [doi:10.2320/jinstmet1952.63.6_685](https://doi.org/10.2320/jinstmet1952.63.6_685) Hiroshi Ohtani, Masamitsu Miyashita, Kiyohito Ishida, Thermodynamic Study of Phase Equilibria in the Sn-Ag-Zn System, J.Japan Inst.Metals 63, 685-694 (1999). _assessment that models this phase_ ## HCP_A3 (Sn–Zn) - Id: `phase:sn-zn: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 4 of 4 calculated diagram(s): 300–2498.93 K, x(Zn) 0.99684–1 - Literature: 8 values (8 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-zn:hcp-a3) Names (7): _corpus: _corpus:phase:sn-zn:hcp-a3 _paper: _paper:10.1007/bf02667882:(Zn), paper:sha256-85fd53a1a176b694:hcp-Zn _tdb: _tdb:SnZn-93Sri.tdb:HCP_A3, tdb:SnZn-96Lee.tdb:HCP_A3, tdb:SnZn-98Fri-LB.tdb:HCP_A3, tdb:SnZn-99Oht.tdb:HCP_A3 ### TDB models of HCP_A3 (4): PHASE and CONSTITUENT statements as written [SnZn-93Sri.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-93Sri.tdb): HCP_A3, type code %A, sha256 `a477685a7eeb967e…` ~~~~text 39: PHASE HCP_A3 %A 2 1 0.5 ! 40: CONST HCP_A3 : SN ZN% : VA: ! ~~~~ [SnZn-96Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-96Lee.tdb): HCP_A3, type code %A, sha256 `242f5b5ef74d7149…` ~~~~text 39: PHASE HCP_A3 %A 2 1 0.5 ! 40: CONST HCP_A3 : SN ZN% : VA: ! ~~~~ [SnZn-98Fri-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-98Fri-LB.tdb): HCP_A3, type code %A, sha256 `c592cd8539bbd468…` ~~~~text 35: PHASE HCP_A3 %A 2 1 0.5 ! 36: CONST HCP_A3 : SN ZN% : VA: ! ~~~~ [SnZn-99Oht.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-99Oht.tdb): HCP_A3, type code %A, sha256 `b9bc638c140accc3…` ~~~~text 38: PHASE HCP_A3 %A 2 1 0.5 ! 39: CONST HCP_A3 : SN ZN% : VA: ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/BF02667882](https://doi.org/10.1007/BF02667882) M. Srivastava, R.C. Sharma, J. Phase Equilib., 14, 700-709(1993). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/S0364-5916(97)00009-6](https://doi.org/10.1016/S0364-5916%2897%2900009-6) B.-J. Lee, Calphad, 20, 471-80(1996). _assessment that models this phase_ - [doi:10.2320/jinstmet1952.63.6_685](https://doi.org/10.2320/jinstmet1952.63.6_685) Hiroshi Ohtani, Masamitsu Miyashita, Kiyohito Ishida, Thermodynamic Study of Phase Equilibria in the Sn-Ag-Zn System, J.Japan Inst.Metals 63, 685-694 (1999). _assessment that models this phase_ ## LIQUID (Sn–Zn) - Id: `phase:sn-zn:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 4 of 4 calculated diagram(s): 465.53–2500 K, x(Zn) 0–1 - Literature: 8 values (8 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sn-zn:liquid) Names (7): _corpus: _corpus:phase:sn-zn:liquid _paper: _paper:10.1007/bf02667882:L, paper:sha256-85fd53a1a176b694:L _tdb: _tdb:SnZn-93Sri.tdb:LIQUID, tdb:SnZn-96Lee.tdb:LIQUID, tdb:SnZn-98Fri-LB.tdb:LIQUID, tdb:SnZn-99Oht.tdb:LIQUID ### TDB models of LIQUID (4): PHASE and CONSTITUENT statements as written [SnZn-93Sri.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-93Sri.tdb): LIQUID, type code %, sha256 `a477685a7eeb967e…` ~~~~text 24: PHASE LIQUID:L % 1 1 ! 25: CONST LIQUID:L : SN ZN : ! ~~~~ [SnZn-96Lee.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-96Lee.tdb): LIQUID, type code %, sha256 `242f5b5ef74d7149…` ~~~~text 24: PHASE LIQUID:L % 1 1 ! 25: CONST LIQUID:L : SN ZN : ! ~~~~ [SnZn-98Fri-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-98Fri-LB.tdb): LIQUID, type code %, sha256 `c592cd8539bbd468…` ~~~~text 20: PHASE LIQUID:L % 1 1 ! 21: CONST LIQUID:L : SN ZN : ! ~~~~ [SnZn-99Oht.tdb](https://orchid-project.org/data/databases/sgte-binary/SnZn-99Oht.tdb): LIQUID, type code %, sha256 `b9bc638c140accc3…` ~~~~text 23: PHASE LIQUID:L % 1 1 ! 24: CONST LIQUID:L : SN ZN : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/BF02667882](https://doi.org/10.1007/BF02667882) M. Srivastava, R.C. Sharma, J. Phase Equilib., 14, 700-709(1993). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/S0364-5916(97)00009-6](https://doi.org/10.1016/S0364-5916%2897%2900009-6) B.-J. Lee, Calphad, 20, 471-80(1996). _assessment that models this phase_ - [doi:10.2320/jinstmet1952.63.6_685](https://doi.org/10.2320/jinstmet1952.63.6_685) Hiroshi Ohtani, Masamitsu Miyashita, Kiyohito Ishida, Thermodynamic Study of Phase Equilibria in the Sn-Ag-Zn System, J.Japan Inst.Metals 63, 685-694 (1999). _assessment that models this phase_ ## Please cite - R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735970 - R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23736065 Also cite B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work). Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes. ```bibtex @misc{orchid_phase_registry_2026, author = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon}, title = {{ORCHID-Registry: phase registry of binary systems}}, version = {2026.10}, publisher = {Zenodo}, year = {2026}, doi = {10.5281/zenodo.23735970}, url = {https://doi.org/10.5281/zenodo.23735970}, note = {Version 1, machine-extracted} } @misc{orchid_data_2026, author = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon}, title = {{ORCHID data: umbrella record of the ORCHID datasets}}, version = {2026.10}, publisher = {Zenodo}, year = {2026}, doi = {10.5281/zenodo.23736065}, url = {https://doi.org/10.5281/zenodo.23736065}, note = {Version 1, machine-extracted} } ``` --- Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).