# Ho–Zn phases > Ho–Zn system: 12 phases (tier A 5, tier C 6, liquid 1); 10 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references. HTML: https://data.orchid-project.org/phases/pages/HO-ZN.html · Markdown: https://data.orchid-project.org/phases/pages/HO-ZN.md 12 phases (tier A 5, tier C 6, liquid 1); 10 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model). Data: [interactive registry](https://orchid-project.org/phases/?q=HO-ZN) · [full JSON](https://data.orchid-project.org/phases/systems/HO-ZN.json) · [Ho–Zn system page](https://data.orchid-project.org/systems/HO-ZN.html) · [Markdown](https://data.orchid-project.org/phases/pages/HO-ZN.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Ho–Zn system (12) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [BCC_A2](#phase-ho-zn-bcc-a2); _phase:ho-zn:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 | | [FCC_A1](#phase-ho-zn-fcc-a1); _phase:ho-zn:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 | | [HCP_A3](#phase-ho-zn-hcp-a3); _phase:ho-zn:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2498.92 K, x(Zn) 0–1 | 0 | 1 | | [HO13ZN58](#phase-ho-zn-ho13zn58); _phase:ho-zn:ho13zn58_ | Gd13Zn58 · hP142 · P6_3/mmc (194) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1197.16 K, x(Zn) 0.8169–0.8169 | 0 | 1 | | [HO2ZN17_HT](#phase-ho-zn-ho2zn17-ht); _phase:ho-zn:ho2zn17-ht_ | Th2Zn17 · hR19 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 1025.49–1177.13 K, x(Zn) 0.89474–0.89474 | 0 | 1 | | [HO2ZN17_LT](#phase-ho-zn-ho2zn17-lt); _phase:ho-zn:ho2zn17-lt_ | Ni17Th2 · hP38 · P6_3/mmc (194) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1025.49 K, x(Zn) 0.89474–0.89474 | 0 | 1 | | [HOZN_B2](#phase-ho-zn-hozn-b2); _phase:ho-zn:hozn-b2_ | CsCl · B2 · cP2 · Pm-3m (221) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1381.44 K, x(Zn) 0.5–0.5 | 0 | 1 | | [HOZN12_D2B](#phase-ho-zn-hozn12-d2b); _phase:ho-zn:hozn12-d2b_ | Mn12Th · D2_b · tI26 · I4/mmm (139) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–960.99 K, x(Zn) 0.92308–0.92308 | 0 | 1 | | [HOZN2](#phase-ho-zn-hozn2); _phase:ho-zn:hozn2_ | Hg2K · oI12 · Imma (74) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1327.8 K, x(Zn) 0.66667–0.66667 | 0 | 1 | | [HOZN3](#phase-ho-zn-hozn3); _phase:ho-zn:hozn3_ | YZn3 · oP16 · Pnma (62) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1182.03 K, x(Zn) 0.75–0.75 | 0 | 1 | | [HOZN5](#phase-ho-zn-hozn5); _phase:ho-zn:hozn5_ | ErZn5 · hP36 · P6_3/mmc (194) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1166.19 K, x(Zn) 0.83333–0.83333 | 0 | 1 | | [LIQUID](#phase-ho-zn-liquid); _phase:ho-zn:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 692.67–2500 K, x(Zn) 0–1 | 0 | 1 | ## BCC_A2 (Ho–Zn) - Id: `phase:ho-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 1 calculated diagram(s) - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-zn:bcc-a2) Names (2): _corpus: _corpus:phase:ho-zn:bcc-a2 _tdb: _tdb:HoZn-19Fre.tdb:BCC_A2 ### TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written [HoZn-19Fre.tdb](https://orchid-project.org/data/databases/sgte-binary/HoZn-19Fre.tdb): BCC_A2, type code %B, sha256 `801cc0583db17e0f…` ~~~~text 30: PHASE BCC_A2 %B 2 1 3 ! 31: CONST BCC_A2 : HO ZN : VA : ! ~~~~ ## FCC_A1 (Ho–Zn) - Id: `phase:ho-zn:fcc-a1`; status `assigned` - Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high - Stoichiometry: Zn 1.0000 - Stability: not stable in 1 calculated diagram(s) - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-zn:fcc-a1) Names (2): _corpus: _corpus:phase:ho-zn:fcc-a1 _tdb: _tdb:HoZn-19Fre.tdb:FCC_A1 ### TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written [HoZn-19Fre.tdb](https://orchid-project.org/data/databases/sgte-binary/HoZn-19Fre.tdb): FCC_A1, type code %A, sha256 `801cc0583db17e0f…` ~~~~text 25: PHASE FCC_A1 %A 2 1 1 ! 26: CONST FCC_A1 : ZN : VA : ! ~~~~ ## HCP_A3 (Ho–Zn) - Id: `phase:ho-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 1 of 1 calculated diagram(s): 300–2498.92 K, x(Zn) 0–1 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-zn:hcp-a3) Names (2): _corpus: _corpus:phase:ho-zn:hcp-a3 _tdb: _tdb:HoZn-19Fre.tdb:HCP_A3 ### TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written [HoZn-19Fre.tdb](https://orchid-project.org/data/databases/sgte-binary/HoZn-19Fre.tdb): HCP_A3, type code %, sha256 `801cc0583db17e0f…` ~~~~text 35: PHASE HCP_A3 % 2 1 0.5 ! 36: CONST HCP_A3 : HO% ZN% : VA : ! ~~~~ ## HO13ZN58 (Ho–Zn) - Id: `phase:ho-zn:ho13zn58`; status `assigned` - Structure: Gd13Zn58 · hP142 · P6_3/mmc (194); type `st:gd13zn58-hp142`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated - Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833) - Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Ho 0.1831, Zn 0.8169 - Stability: stable in 1 of 1 calculated diagram(s): 300–1197.16 K, x(Zn) 0.8169–0.8169 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-zn:ho13zn58) Names (2): _corpus: _corpus:phase:ho-zn:ho13zn58 _tdb: _tdb:HoZn-19Fre.tdb:HO13ZN58 ### TDB models of HO13ZN58 (1): PHASE and CONSTITUENT statements as written [HoZn-19Fre.tdb](https://orchid-project.org/data/databases/sgte-binary/HoZn-19Fre.tdb): HO13ZN58, type code %, sha256 `801cc0583db17e0f…` ~~~~text 55: PHASE HO13ZN58 % 2 13 58 ! 56: CONST HO13ZN58 : HO : ZN : ! ~~~~ ## HO2ZN17_HT (Ho–Zn) - Id: `phase:ho-zn:ho2zn17-ht`; status `assigned` - Structure: Th2Zn17 · hR19 · R-3m (166); type `st:th2zn17-hr19`; 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, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Ho 0.1053, Zn 0.8947 - Stability: stable in 1 of 1 calculated diagram(s): 1025.49–1177.13 K, x(Zn) 0.89474–0.89474 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-zn:ho2zn17-ht) Names (2): _corpus: _corpus:phase:ho-zn:ho2zn17-ht _tdb: _tdb:HoZn-19Fre.tdb:HO2ZN17_HT ### TDB models of HO2ZN17_HT (1): PHASE and CONSTITUENT statements as written [HoZn-19Fre.tdb](https://orchid-project.org/data/databases/sgte-binary/HoZn-19Fre.tdb): HO2ZN17_HT, type code %, sha256 `801cc0583db17e0f…` ~~~~text 70: PHASE HO2ZN17_HT % 2 2 17 ! 71: CONST HO2ZN17_HT : HO : ZN : ! ~~~~ ## HO2ZN17_LT (Ho–Zn) - Id: `phase:ho-zn:ho2zn17-lt`; status `assigned` - Structure: Ni17Th2 · hP38 · P6_3/mmc (194); type `st:ni17th2-hp38`; 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, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Ho 0.1053, Zn 0.8947 - Stability: stable in 1 of 1 calculated diagram(s): 300–1025.49 K, x(Zn) 0.89474–0.89474 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-zn:ho2zn17-lt) Names (2): _corpus: _corpus:phase:ho-zn:ho2zn17-lt _tdb: _tdb:HoZn-19Fre.tdb:HO2ZN17_LT ### TDB models of HO2ZN17_LT (1): PHASE and CONSTITUENT statements as written [HoZn-19Fre.tdb](https://orchid-project.org/data/databases/sgte-binary/HoZn-19Fre.tdb): HO2ZN17_LT, type code %, sha256 `801cc0583db17e0f…` ~~~~text 65: PHASE HO2ZN17_LT % 2 2 17 ! 66: CONST HO2ZN17_LT : HO : ZN : ! ~~~~ ## HOZN_B2 (Ho–Zn) - Id: `phase:ho-zn:hozn-b2`; status `assigned` - Structure: CsCl · B2 · cP2 · Pm-3m (221); type `st:b2-cscl-cp2`; tier A: standard phase name; confidence high - Caveat: DFT agrees: on-hull mp-aaaaadin and oqmd-89929, space group 221 - Stoichiometry: Ho 0.5000, Zn 0.5000 - Stability: stable in 1 of 1 calculated diagram(s): 300–1381.44 K, x(Zn) 0.5–0.5 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-zn:hozn-b2) Names (4): _corpus: _corpus:phase:ho-zn:hozn-b2 _mp: _mp:mp-aaaaadin _oqmd: _oqmd:oqmd-89929 _tdb: _tdb:HoZn-19Fre.tdb:HOZN_B2 ### TDB models of HOZN_B2 (1): PHASE and CONSTITUENT statements as written [HoZn-19Fre.tdb](https://orchid-project.org/data/databases/sgte-binary/HoZn-19Fre.tdb): HOZN_B2, type code %, sha256 `801cc0583db17e0f…` ~~~~text 40: PHASE HOZN_B2 % 2 1 1 ! 41: CONST HOZN_B2 : HO : ZN : ! ~~~~ ## HOZN12_D2B (Ho–Zn) - Id: `phase:ho-zn:hozn12-d2b`; status `assigned` - Structure: Mn12Th · D2_b · tI26 · I4/mmm (139); type `st:d2-b-mn12th-ti26`; tier A: standard phase name; confidence high - Caveat: DFT agrees: on-hull mp-aaackuxh and oqmd-30567, space group 139 - Stoichiometry: Ho 0.0769, Zn 0.9231 - Stability: stable in 1 of 1 calculated diagram(s): 300–960.99 K, x(Zn) 0.92308–0.92308 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-zn:hozn12-d2b) Names (4): _corpus: _corpus:phase:ho-zn:hozn12-d2b _mp: _mp:mp-aaackuxh _oqmd: _oqmd:oqmd-30567 _tdb: _tdb:HoZn-19Fre.tdb:HOZN12_D2B ### TDB models of HOZN12_D2B (1): PHASE and CONSTITUENT statements as written [HoZn-19Fre.tdb](https://orchid-project.org/data/databases/sgte-binary/HoZn-19Fre.tdb): HOZN12_D2B, type code %, sha256 `801cc0583db17e0f…` ~~~~text 75: PHASE HOZN12_D2B % 2 1 12 ! 76: CONST HOZN12_D2B : HO : ZN : ! ~~~~ ## HOZN2 (Ho–Zn) - Id: `phase:ho-zn:hozn2`; status `assigned` - Structure: Hg2K · oI12 · Imma (74); type `st:hg2k-oi12`; 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 (dft_space_group_74_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Ho 0.3333, Zn 0.6667 - Stability: stable in 1 of 1 calculated diagram(s): 300–1327.8 K, x(Zn) 0.66667–0.66667 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-zn:hozn2) Names (2): _corpus: _corpus:phase:ho-zn:hozn2 _tdb: _tdb:HoZn-19Fre.tdb:HOZN2 ### TDB models of HOZN2 (1): PHASE and CONSTITUENT statements as written [HoZn-19Fre.tdb](https://orchid-project.org/data/databases/sgte-binary/HoZn-19Fre.tdb): HOZN2, type code %, sha256 `801cc0583db17e0f…` ~~~~text 45: PHASE HOZN2 % 2 1 2 ! 46: CONST HOZN2 : HO : ZN : ! ~~~~ ## HOZN3 (Ho–Zn) - Id: `phase:ho-zn:hozn3`; status `assigned` - Structure: YZn3 · oP16 · Pnma (62); type `st:yzn3-op16`; 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 (dft_space_group_62_matches_4_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Ho 0.2500, Zn 0.7500 - Stability: stable in 1 of 1 calculated diagram(s): 300–1182.03 K, x(Zn) 0.75–0.75 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-zn:hozn3) Names (2): _corpus: _corpus:phase:ho-zn:hozn3 _tdb: _tdb:HoZn-19Fre.tdb:HOZN3 ### TDB models of HOZN3 (1): PHASE and CONSTITUENT statements as written [HoZn-19Fre.tdb](https://orchid-project.org/data/databases/sgte-binary/HoZn-19Fre.tdb): HOZN3, type code %, sha256 `801cc0583db17e0f…` ~~~~text 50: PHASE HOZN3 % 2 1 3 ! 51: CONST HOZN3 : HO : ZN : ! ~~~~ ## HOZN5 (Ho–Zn) - Id: `phase:ho-zn:hozn5`; status `assigned` - Structure: ErZn5 · hP36 · P6_3/mmc (194); type `st:erzn5-hp36`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated - Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833) - Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Ho 0.1667, Zn 0.8333 - Stability: stable in 1 of 1 calculated diagram(s): 300–1166.19 K, x(Zn) 0.83333–0.83333 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-zn:hozn5) Names (2): _corpus: _corpus:phase:ho-zn:hozn5 _tdb: _tdb:HoZn-19Fre.tdb:HOZN5 ### TDB models of HOZN5 (1): PHASE and CONSTITUENT statements as written [HoZn-19Fre.tdb](https://orchid-project.org/data/databases/sgte-binary/HoZn-19Fre.tdb): HOZN5, type code %, sha256 `801cc0583db17e0f…` ~~~~text 60: PHASE HOZN5 % 2 1 5 ! 61: CONST HOZN5 : HO : ZN : ! ~~~~ ## LIQUID (Ho–Zn) - Id: `phase:ho-zn:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 692.67–2500 K, x(Zn) 0–1 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-zn:liquid) Names (2): _corpus: _corpus:phase:ho-zn:liquid _tdb: _tdb:HoZn-19Fre.tdb:LIQUID ### TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written [HoZn-19Fre.tdb](https://orchid-project.org/data/databases/sgte-binary/HoZn-19Fre.tdb): LIQUID, type code %, sha256 `801cc0583db17e0f…` ~~~~text 20: PHASE LIQUID:L % 1 1 ! 21: CONST LIQUID:L : HO ZN : ! ~~~~ ## 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).